@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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) format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.28"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);border:0;height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.6666666667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}:root{--primary: #2dd528;--primary-dark: #15de29;--text-main: #2D3436;--white: #FFFFFF;--nav-height: 80px;--transition: all .3s cubic-bezier(.165, .84, .44, 1)}.nav-v2{position:fixed;top:0;left:0;width:100%;z-index:1000;transition:background .3s ease,box-shadow .3s ease;display:flex;flex-direction:column;align-items:stretch;background:#fffffff7;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);animation:navFadeIn .6s ease-out}@keyframes navFadeIn{0%{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}.nav-v2.scrolled{background:#fffffff5;-webkit-backdrop-filter:blur(20px) saturate(1.4);backdrop-filter:blur(20px) saturate(1.4);box-shadow:0 1px 3px #0000000a,0 8px 24px #0000000f}.nav-container{width:100%;max-width:1280px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;height:var(--nav-height);padding:0 5%;flex-shrink:0}.logo-text{font-size:1.5rem;font-weight:800;color:var(--text-main);letter-spacing:-.5px;cursor:pointer;transition:opacity .2s ease}.logo-text:hover{opacity:.75}.logo-text span{color:var(--primary)}.nav-logo{display:flex;align-items:center;cursor:pointer;transition:transform .25s cubic-bezier(.34,1.56,.64,1)}.nav-logo:hover{transform:scale(1.04)}.nav-desktop{list-style:none;display:flex;align-items:center;gap:6px}.nav-desktop li button{background:none;border:none;font-size:.88rem;font-weight:600;color:var(--text-main);cursor:pointer;padding:8px 16px;border-radius:10px;position:relative;white-space:nowrap;transition:var(--transition);letter-spacing:-.15px}.nav-desktop li button:hover{background:#2dd52812;color:var(--primary)}.nav-desktop li button.active{background:#2dd5281a;color:var(--primary);box-shadow:0 1px 3px #2dd5281f}.btn-login{display:flex;align-items:center;gap:8px;background:var(--primary)!important;color:#fff!important;padding:10px 22px!important;border-radius:100px!important;font-weight:700!important;transition:var(--transition);box-shadow:0 4px 12px #2dd52838}.btn-login:hover{transform:translateY(-2px);background:var(--primary-dark)!important;box-shadow:0 6px 18px #2dd52852}.nav-mobile-toggle{display:none;background:none;border:none;color:var(--text-main);cursor:pointer}.logo{height:40px;width:auto}.user-menu-container{position:relative;display:flex;align-items:center}.user-menu-button{display:flex;align-items:center;gap:8px;background:none;border:none;color:var(--text-main);cursor:pointer;padding:8px 12px;border-radius:6px;font-weight:600;font-size:.95rem;transition:var(--transition)}.user-menu-button:hover{background-color:#2dd5281a;color:var(--primary)}.user-menu-button .username{display:inline;font-size:.9rem}.user-menu-dropdown{position:absolute;top:100%;right:0;background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:16px;box-shadow:0 12px 40px #0000001a,0 2px 8px #0000000a;min-width:260px;margin-top:10px;z-index:1001;overflow:hidden;animation:slideDown .3s cubic-bezier(.34,1.56,.64,1)}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}.user-info{padding:18px 16px;border-bottom:1px solid rgba(0,0,0,.05);background:linear-gradient(135deg,#2dd52808,#2dd52803)}.user-full-name{font-weight:700;color:var(--text-main);margin:0 0 3px;font-size:.92rem}.user-email{color:#888;margin:0 0 4px;font-size:.8rem}.user-level{color:var(--primary);margin:0;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em}.menu-divider{border:none;border-top:1px solid rgba(0,0,0,.05);margin:0}.settings-button{width:100%;display:flex;align-items:center;justify-content:flex-start;gap:10px;background:none;border:none;color:#555;cursor:pointer;padding:12px 18px;font-weight:600;font-size:.88rem;transition:var(--transition)}.settings-button:hover{background:#2dd5280d;color:var(--primary)}.settings-button svg{color:#aaa;transition:var(--transition)}.settings-button:hover svg{color:var(--primary)}.exit-session-button{width:100%;display:flex;align-items:center;justify-content:flex-start;gap:10px;background:none;border:none;color:#d32f2f;cursor:pointer;padding:12px 18px;font-weight:600;font-size:.88rem;transition:var(--transition)}.exit-session-button:hover{background:#d32f2f0d;color:#c62828}@media(max-width:1024px){.nav-desktop{display:none}.nav-mobile-toggle{display:flex;align-items:center;justify-content:center}.user-menu-container,.nav-upgrade-btn,.nav-premium-badge{display:none}}.nav-mobile-wrapper{width:100%;background:#fff;border-top:1px solid rgba(0,0,0,.07);padding:6px 0 14px;animation:mobileSlide .25s ease-out;box-shadow:0 8px 24px #00000014;overflow-y:auto;max-height:calc(100vh - var(--nav-height))}@keyframes mobileSlide{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.nav-mobile{list-style:none;display:flex;flex-direction:column;padding:0 16px;gap:2px}.nav-mobile li button{width:100%;text-align:left;background:none;border:none;font-size:.92rem;font-weight:600;color:var(--text-main);cursor:pointer;padding:12px 14px;border-radius:10px;transition:var(--transition)}.nav-mobile li button:hover{background:#2dd5280f;color:var(--primary)}.nav-mobile li button.active{background:#2dd5281a;color:var(--primary)}.mobile-user-section{border-top:1px solid rgba(0,0,0,.05);padding:12px 16px;margin-top:6px}.mobile-user-name{font-weight:700;color:var(--text-main);margin:0 0 8px;font-size:.88rem}.mobile-exit-session{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;background:#d32f2f0f;border:1px solid rgba(211,47,47,.12);color:#d32f2f;cursor:pointer;padding:10px 12px;font-weight:600;font-size:.85rem;border-radius:10px;transition:var(--transition)}.mobile-exit-session:hover{background:#d32f2f1a;color:#c62828}.mobile-upgrade-btn{width:calc(100% - 32px);display:flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;border-radius:12px;padding:.85rem;font-size:.92rem;font-weight:700;cursor:pointer;margin:0 16px 10px;box-shadow:0 4px 16px #2dd52838;transition:all .2s ease}.mobile-upgrade-btn:hover{transform:translateY(-1px);box-shadow:0 6px 20px #2dd5284d}.mobile-premium-badge{display:flex;align-items:center;justify-content:center;gap:6px;background:#2dd5280f;color:#2dd528;border:1px solid rgba(45,213,40,.15);border-radius:12px;padding:.75rem;font-size:.88rem;font-weight:700;margin:0 16px 10px}.nav-upgrade-btn{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,#2dd528,#1ec21a);color:#fff;border:none;border-radius:100px;padding:8px 18px;font-size:.82rem;font-weight:700;cursor:pointer;transition:all .2s cubic-bezier(.34,1.56,.64,1);margin-right:8px;white-space:nowrap;box-shadow:0 2px 10px #2dd52840}.nav-upgrade-btn:hover{transform:translateY(-2px) scale(1.03);box-shadow:0 4px 16px #2dd52861}.nav-premium-badge{display:inline-flex;align-items:center;gap:5px;background:#2dd52814;color:#2dd528;border:1px solid rgba(45,213,40,.18);border-radius:100px;padding:6px 14px;font-size:.78rem;font-weight:700;cursor:default;margin-right:8px;white-space:nowrap;transition:all .2s ease}.nav-premium-badge:hover{background:#2dd5281f}.animated-page{animation:pageEnter .55s cubic-bezier(.22,1,.36,1) forwards;will-change:opacity,transform}@keyframes pageEnter{0%{opacity:0;transform:translateY(30px) scale(.96);filter:blur(2px)}to{opacity:1;transform:translateY(0) scale(1);filter:blur(0)}}.reveal-up{animation:revealUp .7s cubic-bezier(.22,1,.36,1) both}.reveal-up-d1{animation-delay:.1s}.reveal-up-d2{animation-delay:.2s}.reveal-up-d3{animation-delay:.3s}.reveal-up-d4{animation-delay:.4s}.reveal-up-d5{animation-delay:.5s}.reveal-left{animation:revealLeft .7s cubic-bezier(.22,1,.36,1) both}@keyframes revealLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}.reveal-scale{animation:revealScale .6s cubic-bezier(.22,1,.36,1) both}@keyframes revealScale{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}.tilt-3d{transition:transform .35s cubic-bezier(.22,1,.36,1);transform-style:preserve-3d}.tilt-3d:hover{transform:perspective(900px) rotateX(2deg) rotateY(-2deg) translateY(-6px)}.stagger-reveal>*{opacity:0;animation:revealUp .5s cubic-bezier(.22,1,.36,1) forwards}.stagger-reveal>*:nth-child(1){animation-delay:.05s}.stagger-reveal>*:nth-child(2){animation-delay:.12s}.stagger-reveal>*:nth-child(3){animation-delay:.19s}.stagger-reveal>*:nth-child(4){animation-delay:.26s}.stagger-reveal>*:nth-child(5){animation-delay:.33s}.stagger-reveal>*:nth-child(6){animation-delay:.4s}.stagger-reveal>*:nth-child(7){animation-delay:.47s}.stagger-reveal>*:nth-child(8){animation-delay:.54s}.fade-in-section{opacity:0;transform:translateY(30px);transition:opacity .6s cubic-bezier(.22,1,.36,1),transform .6s cubic-bezier(.22,1,.36,1)}.fade-in-section.visible{opacity:1;transform:translateY(0)}.reveal-3d{opacity:0;transform:perspective(1000px) rotateX(15deg) translateY(40px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1)}.reveal-3d.visible{opacity:1;transform:perspective(1000px) rotateX(0) translateY(0)}.reveal-3d-left{opacity:0;transform:perspective(1000px) rotateY(-15deg) translate(-40px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1)}.reveal-3d-left.visible{opacity:1;transform:perspective(1000px) rotateY(0) translate(0)}.reveal-3d-scale{opacity:0;transform:perspective(1000px) scale(.9) translateY(30px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1)}.reveal-3d-scale.visible{opacity:1;transform:perspective(1000px) scale(1) translateY(0)}:root{--primary: #2dd528;--primary-dark: #15de29;--secondary: #F8F1E9;--text-main: #2D3436;--text-muted: #636E72;--white: #FFFFFF;--transition: all .4s cubic-bezier(.165, .84, .44, 1)}.home-wrapper{overflow-x:hidden;font-family:Inter,Poppins,sans-serif;color:var(--text-main);background:var(--white)}.hero-section{position:relative;min-height:90vh;display:flex;align-items:center;padding:80px 4%;background:linear-gradient(180deg,#2dd5280a,#fff0)}.hero-container{display:grid;grid-template-columns:1.2fr 1fr;gap:60px;max-width:1400px;width:100%;margin:0 auto;position:relative;z-index:1}.badge{display:inline-block;padding:6px 16px;background:#2dd5281a;color:var(--primary-dark);border-radius:100px;font-weight:600;font-size:.85rem;margin-bottom:24px;letter-spacing:.5px;animation:slideInLeft .8s ease-out}.hero-title{font-size:4.5rem;line-height:1.05;font-weight:800;margin-bottom:24px;animation:slideInUp .8s ease-out .1s both}.hero-title .highlight{color:var(--primary);position:relative}.hero-subtitle{font-size:1.35rem;color:var(--text-muted);line-height:1.6;max-width:620px;margin-bottom:40px;animation:slideInUp .8s ease-out .2s both}.hero-actions{display:flex;gap:16px;animation:slideInUp .8s ease-out .3s both}.btn-primary{background:var(--primary);color:#fff;padding:16px 32px;border-radius:12px;font-weight:600;font-size:1.1rem;border:none;cursor:pointer;display:flex;align-items:center;gap:10px;transition:var(--transition);box-shadow:0 10px 20px #2dd52833}.btn-primary:hover{transform:translateY(-4px);background:var(--primary-dark);box-shadow:0 15px 30px #2dd5284d}.btn-secondary{background:transparent;color:var(--text-main);padding:16px 32px;border-radius:12px;font-weight:600;font-size:1.1rem;border:2px solid #E0E0E0;cursor:pointer;transition:var(--transition)}.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}.hero-visual{position:relative;display:flex;justify-content:center;align-items:center;animation:fadeIn 1.2s ease-out .4s both}.floating-card-container{position:relative;width:100%;height:450px}.hero-main-image{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:320px;height:320px}.main-circle{width:100%;height:100%;background:var(--primary);border-radius:30% 70% 70% 30%/30% 30% 70% 70%;display:flex;align-items:center;justify-content:center;animation:morph 8s ease-in-out infinite;box-shadow:0 20px 40px #2dd5284d}.formula{color:#fff;font-family:serif;font-size:2.5rem;font-weight:700}@keyframes morph{0%,to{border-radius:30% 70% 70% 30%/30% 30% 70% 70%}50%{border-radius:70% 30% 30% 70%/70% 70% 30% 30%}}.floating-card{position:absolute;background:#fff;padding:16px 20px;border-radius:16px;display:flex;align-items:center;gap:15px;box-shadow:0 10px 30px #00000014;z-index:2;animation:float 4s ease-in-out infinite}.floating-card h4{margin:0;font-size:1rem}.floating-card p{margin:0;font-size:.8rem;color:var(--text-muted)}.icon-box{width:40px;height:40px;background:#2dd5281a;border-radius:10px;display:flex;align-items:center;justify-content:center}.card-1{top:10%;left:0;animation-delay:0s}.card-2{bottom:10%;right:0;animation-delay:1.5s}.features-section{padding:120px 4%;background:var(--white)}.section-header{text-align:center;max-width:720px;margin:0 auto 80px}.section-header h2{font-size:2.8rem;font-weight:800;margin-bottom:16px}.section-header p{color:var(--text-muted);font-size:1.15rem}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:30px;max-width:1400px;margin:0 auto}.feature-item{position:relative;background:#f9fafb;padding:50px 40px;border-radius:24px;transition:var(--transition);cursor:pointer;border:1px solid transparent;transform-style:preserve-3d}.feature-item:hover{background:#fff;transform:perspective(900px) rotateX(1deg) rotateY(-1deg) translateY(-8px);box-shadow:0 20px 40px #0000000d;border-color:#2dd52833}.feature-icon{width:70px;height:70px;background:#fff;border-radius:20px;display:flex;align-items:center;justify-content:center;color:var(--primary);margin-bottom:30px;box-shadow:0 8px 16px #0000000a;transition:var(--transition)}.feature-item:hover .feature-icon{background:var(--primary);color:#fff}.feature-item h3{font-size:1.5rem;margin-bottom:16px;color:var(--text-main)}.feature-item p{color:var(--text-muted);line-height:1.6}.feature-hover-line{position:absolute;bottom:0;left:0;width:0;height:4px;background:var(--primary);border-radius:0 0 0 24px;transition:var(--transition)}.feature-item:hover .feature-hover-line{width:100%}.stats-section{padding:80px 4%;background:var(--primary);color:#fff}.stats-container{display:grid;grid-template-columns:repeat(3,1fr);max-width:1200px;margin:0 auto;text-align:center}.stat-number{display:block;font-size:3.5rem;font-weight:800;margin-bottom:8px}.stat-label{font-size:1.1rem;opacity:.9;font-weight:500}.footer-v2{padding:60px 4%;border-top:1px solid #EFEFEF;text-align:center}.footer-logo{font-size:1.5rem;font-weight:800;color:var(--primary);margin-bottom:16px}.quick-actions-section{padding:80px 4%;background:linear-gradient(180deg,#fff,#f0fdf4)}.quick-actions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;max-width:1300px;margin:0 auto}.quick-action-card{background:#ffffffd9;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(40,224,40,.12);border-radius:18px;padding:32px 24px;text-align:center;cursor:pointer;box-shadow:0 2px 12px #00000008;transition:transform .3s,box-shadow .3s;transform-style:preserve-3d}.quick-action-card:hover{transform:perspective(900px) rotateX(2deg) rotateY(-2deg) translateY(-6px) scale(1.03);box-shadow:0 12px 36px #28e02826}.qa-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin:0 auto 14px}.quick-action-card h3{font-size:16px;font-weight:700;color:#111;margin-bottom:6px}.quick-action-card p{font-size:13px;color:#888;margin:0}.hero-anim-delay-1{animation:heroFadeUp .5s .2s cubic-bezier(.22,1,.36,1) both}.hero-anim-delay-2{animation:heroFadeUp .5s .3s cubic-bezier(.22,1,.36,1) both}.hero-anim-delay-3{animation:heroFadeUp .5s .4s cubic-bezier(.22,1,.36,1) both}.hero-anim-delay-4{animation:heroFadeUp .5s .5s cubic-bezier(.22,1,.36,1) both}.hero-anim-delay-5{animation:heroFadeRight .6s .6s cubic-bezier(.22,1,.36,1) both}@keyframes heroFadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes heroFadeRight{0%{opacity:0;transform:translate(40px)}to{opacity:1;transform:translate(0)}}.floating-card.card-1{animation:floatY 4s ease-in-out infinite}.floating-card.card-2{animation:floatY 5s ease-in-out 1s infinite}.floating-card.card-3{animation:floatY 3.5s ease-in-out .5s infinite}@keyframes floatY{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.quick-action-card{transition:transform .2s,box-shadow .2s}.quick-action-card:hover{transform:scale(1.03) translateY(-4px);box-shadow:0 8px 30px #28e0281f}.quick-action-card:active{transform:scale(.97)}.feature-item{transition:transform .2s}.feature-item:hover{transform:translateY(-6px)}.stat-card{transition:transform .2s}.stat-card:hover{transform:scale(1.05)}@keyframes slideInUp{0%{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-40px)}to{opacity:1;transform:translate(0)}}@media(max-width:1024px){.hero-title{font-size:3rem}.hero-container{gap:40px}}@media(max-width:768px){.hero-container{grid-template-columns:1fr;text-align:center}.hero-subtitle{margin:0 auto 40px}.hero-actions{justify-content:center}.hero-visual{display:none}.stats-container{grid-template-columns:1fr;gap:40px}.feature-item{padding:40px 30px}}.about-wrapper{min-height:100vh;background:linear-gradient(180deg,#f8fdf8,#fff 30%,#f4fbf4);padding-top:90px;padding-bottom:60px;position:relative;overflow-x:hidden}.about-container{max-width:1400px;margin:0 auto;padding:0 4%}.about-back{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;background:#28e02814;color:#22c522;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;margin-bottom:16px;transition:all .2s}.about-back:hover{background:#28e02826}.reveal-3d.visible .about-hero-badge,.reveal-3d-scale.visible .about-hero-badge{animation:revealUp .6s cubic-bezier(.22,1,.36,1) both}.reveal-3d.visible .about-hero-title,.reveal-3d-scale.visible .about-hero-title{animation:revealUp .6s .1s cubic-bezier(.22,1,.36,1) both}.reveal-3d.visible .about-hero-desc,.reveal-3d-scale.visible .about-hero-desc{animation:revealUp .6s .2s cubic-bezier(.22,1,.36,1) both}.reveal-3d.visible .about-hero-stats,.reveal-3d-scale.visible .about-hero-stats{animation:revealUp .6s .3s cubic-bezier(.22,1,.36,1) both}.reveal-3d.visible .section-title,.reveal-3d-scale.visible .section-title,.reveal-3d-left.visible .section-title{animation:revealUp .6s cubic-bezier(.22,1,.36,1) both}.reveal-3d-scale.visible .mission-card,.reveal-3d-left.visible .feature-item{animation:revealUp .5s cubic-bezier(.22,1,.36,1) both}.reveal-3d-scale.visible .mission-card:nth-child(1){animation-delay:.05s}.reveal-3d-scale.visible .mission-card:nth-child(2){animation-delay:.12s}.reveal-3d-scale.visible .mission-card:nth-child(3){animation-delay:.19s}.reveal-3d-left.visible .feature-item:nth-child(1){animation-delay:.04s}.reveal-3d-left.visible .feature-item:nth-child(2){animation-delay:.08s}.reveal-3d-left.visible .feature-item:nth-child(3){animation-delay:.12s}.reveal-3d-left.visible .feature-item:nth-child(4){animation-delay:.16s}.reveal-3d-left.visible .feature-item:nth-child(5){animation-delay:.2s}.reveal-3d-left.visible .feature-item:nth-child(6){animation-delay:.24s}.about-bg-symbols{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}.math-symbol{position:absolute;font-size:2.5rem;font-weight:800;color:#2dd5280f;-webkit-user-select:none;user-select:none;animation:symbolFloat 8s ease-in-out infinite}.sym-1{top:15%;left:8%;animation-delay:0s}.sym-2{top:25%;right:10%;animation-delay:1.5s;font-size:3rem}.sym-3{top:55%;left:5%;animation-delay:3s}.sym-4{top:65%;right:8%;animation-delay:2s;font-size:3.5rem}.sym-5{top:80%;left:15%;animation-delay:4s}.sym-6{top:40%;right:5%;animation-delay:2.5s}@keyframes symbolFloat{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-20px) rotate(5deg)}}.about-hero{position:relative;z-index:1;padding:40px 0 60px;text-align:center}.about-hero-inner{max-width:1000px;margin:0 auto}.about-hero-badge{display:inline-flex;align-items:center;gap:8px;background:#2dd52814;color:#22c522;padding:8px 20px;border-radius:100px;font-size:.85rem;font-weight:700;margin-bottom:24px;border:1px solid rgba(45,213,40,.15)}.about-hero-title{font-size:3.6rem;font-weight:800;line-height:1.1;color:#111;margin-bottom:20px;letter-spacing:-1px}.gradient-text{background:linear-gradient(135deg,#28e028,#15de29,#0ebb0e);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.about-hero-desc{font-size:1.25rem;color:#555;line-height:1.7;max-width:720px;margin:0 auto 40px}.about-hero-stats{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}.hero-stat{display:flex;flex-direction:column;align-items:center;gap:4px}.hero-stat-num{font-size:2rem;font-weight:800;color:#111}.hero-stat-label{font-size:.85rem;color:#888;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.hero-stat-divider{width:1px;height:40px;background:#0000001a}.section-title{text-align:center;font-size:2rem;font-weight:800;color:#111;margin-bottom:48px;position:relative;z-index:1}.about-mission{padding:32px 0 48px;position:relative;z-index:1}.mission-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;max-width:1200px;margin:0 auto}.mission-card{background:#fff;border-radius:24px;padding:36px 32px;border:1px solid rgba(0,0,0,.04);box-shadow:0 4px 24px #00000008;transition:all .35s cubic-bezier(.22,1,.36,1);position:relative;overflow:hidden}.mission-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#28e028,#22c522);transform:scaleX(0);transition:transform .35s cubic-bezier(.22,1,.36,1)}.mission-card:hover{transform:perspective(900px) rotateX(1deg) rotateY(-1deg) translateY(-8px);box-shadow:0 20px 50px #00000014}.mission-card:hover:before{transform:scaleX(1)}.mission-icon-wrap{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,#28e028,#22c522);display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:20px}.mission-card h3{font-size:1.2rem;font-weight:700;color:#111;margin-bottom:10px}.mission-card p{font-size:.95rem;color:#666;line-height:1.6}.about-features{padding:32px 0 48px;position:relative;z-index:1}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;max-width:1300px;margin:0 auto}.feature-item{background:#fff;border-radius:20px;padding:28px;border:1px solid rgba(0,0,0,.04);box-shadow:0 2px 12px #00000005;transition:all .3s cubic-bezier(.22,1,.36,1);display:flex;flex-direction:column;gap:12px}.feature-item:hover{transform:perspective(900px) rotateX(1deg) rotateY(-1deg) translateY(-4px);box-shadow:0 12px 32px #0000000f;border-color:#2dd52826}.feature-icon{width:44px;height:44px;border-radius:12px;background:#2dd52814;display:flex;align-items:center;justify-content:center;color:#22c522}.feature-item h4{font-size:1.05rem;font-weight:700;color:#111}.feature-item p{font-size:.9rem;color:#777;line-height:1.5}.about-cta{padding:32px 0 20px;position:relative;z-index:1}.about-cta-card{max-width:900px;margin:0 auto;background:linear-gradient(135deg,#1a1a2e,#16213e);border-radius:28px;padding:52px 40px;text-align:center;color:#fff;position:relative;overflow:hidden}.about-cta-card:before{content:"";position:absolute;top:-50%;right:-30%;width:400px;height:400px;background:radial-gradient(circle,rgba(45,213,40,.15) 0%,transparent 70%);border-radius:50%}.about-cta-card h2{font-size:1.8rem;font-weight:800;margin-bottom:12px;position:relative;z-index:1}.about-cta-card p{font-size:1rem;color:#ffffffb3;position:relative;z-index:1}@media(max-width:768px){.about-hero-title{font-size:2.2rem}.about-hero-stats{flex-direction:column;gap:20px}.hero-stat-divider{display:none}.mission-grid,.features-grid{grid-template-columns:1fr}.about-cta-card{padding:36px 24px}}.footer{background:#111827;color:#e5e7eb;padding:36px 6% 18px;width:100%;box-sizing:border-box;margin-top:auto}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px;max-width:1180px;margin:0 auto;text-align:left}.footer h3,.footer h4{color:#fff;margin:0 0 10px}.footer p{margin:0 0 8px;color:#cbd5e1;line-height:1.55;font-size:.92rem}.footer a{display:block;color:#d1fae5;text-decoration:none;font-weight:500;margin-bottom:8px}.footer a:hover{color:#2dd528}.footer-contact{font-weight:600}.rights{color:#9ca3af;max-width:1180px;margin:24px auto 0;padding-top:16px;border-top:1px solid rgba(255,255,255,.1);text-align:center}@media(max-width:760px){.footer-grid{grid-template-columns:1fr}}:root{--primary: #2dd528;--primary-dark: #15de29;--bg-soft: #fcfdfc;--text-main: #2D3436;--text-muted: #636E72;--white: #FFFFFF;--shadow-md: 0 10px 30px rgba(0, 0, 0, .08);--transition: all .3s cubic-bezier(.165, .84, .44, 1)}.select-wrapper{min-height:100vh;background:var(--bg-soft);font-family:Inter,Poppins,sans-serif;color:var(--text-main);position:relative;display:flex;flex-direction:column;padding-top:90px}.select-header{padding:24px 4%;max-width:1400px;margin:0 auto;width:100%}.select-intro{text-align:center;margin-bottom:48px;padding:0 24px}.select-intro .select-badge{display:inline-flex;align-items:center;gap:6px;background:#2dd5281a;color:#22c522;border-radius:100px;padding:6px 14px;font-weight:600;font-size:.75rem;text-transform:uppercase;margin-bottom:16px;animation:revealUp .6s cubic-bezier(.22,1,.36,1) both}.select-title{font-size:3.2rem;font-weight:800;margin-bottom:12px;animation:revealUp .6s .1s cubic-bezier(.22,1,.36,1) both}.select-title .highlight{color:var(--primary)}.select-subtitle{color:var(--text-muted);font-size:1.15rem;max-width:560px;margin:0 auto;animation:revealUp .6s .2s cubic-bezier(.22,1,.36,1) both}.select-container{flex:1;max-width:1300px;width:100%;margin:0 auto;padding:20px 4% 60px}.select-options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}.option-card{background:var(--white);padding:32px 28px;border-radius:22px;display:flex;flex-direction:column;align-items:flex-start;gap:18px;cursor:pointer;border:1px solid #F0F0F0;transition:var(--transition);transform-style:preserve-3d;animation:revealUp .5s cubic-bezier(.22,1,.36,1) both}.select-options-grid .option-card:nth-child(1){animation-delay:.05s}.select-options-grid .option-card:nth-child(2){animation-delay:.1s}.select-options-grid .option-card:nth-child(3){animation-delay:.15s}.select-options-grid .option-card:nth-child(4){animation-delay:.2s}.select-options-grid .option-card:nth-child(5){animation-delay:.25s}.option-card:hover{transform:perspective(900px) rotateX(2deg) rotateY(-2deg) translateY(-6px);box-shadow:var(--shadow-md);border-color:#2dd52840}.option-card .option-top{display:flex;align-items:center;justify-content:space-between;width:100%}.option-icon-wrapper{width:56px;height:56px;background:#2dd52814;border-radius:16px;display:flex;align-items:center;justify-content:center;color:var(--primary);transition:var(--transition)}.option-card:hover .option-icon-wrapper{background:linear-gradient(135deg,#28e028,#22c522);color:var(--white);box-shadow:0 8px 20px #2dd52840}.option-arrow{color:#ccc;transition:var(--transition)}.option-card:hover .option-arrow{color:var(--primary);transform:translate(4px)}.option-content h3{font-size:1.3rem;margin-bottom:6px;font-weight:700;color:#111}.option-content p{color:var(--text-muted);font-size:.95rem;line-height:1.5;margin:0}.select-footer{text-align:center;padding:24px;color:#999;font-size:.9rem}@media(max-width:768px){.select-options-grid{grid-template-columns:1fr}.select-title{font-size:2.2rem}.select-container{padding:20px 4% 40px}}.questions-page{min-height:100vh;background:var(--bg-page);color:var(--text-main);font-family:Inter,Poppins,sans-serif;padding-top:90px}.questions-container{max-width:1100px;margin:0 auto;padding:20px 4%}.questions-header{margin-bottom:32px;animation:revealUp .6s cubic-bezier(.22,1,.36,1) both}.questions-header h1{font-size:2.2rem;font-weight:800}.questions-header p{color:var(--text-muted);font-size:1.05rem}.questions-grid{display:grid;grid-template-columns:1fr;gap:20px}.question-card{background:#fff;border-radius:22px;box-shadow:var(--shadow-card);border:1px solid rgba(0,0,0,.06);overflow:hidden;transition:var(--transition);transform-style:preserve-3d}.question-card:hover{transform:perspective(900px) rotateX(.5deg) rotateY(-.5deg) translateY(-3px);box-shadow:var(--shadow-hover)}.card-q-header{padding:16px 24px;background:#fdfdfd;border-bottom:1px solid #f0f0f0;display:flex;justify-content:space-between;align-items:center}.difficulty-tag{font-size:.75rem;padding:4px 10px;background:#eefbee;color:var(--primary);border-radius:6px;font-weight:600}.q-body{padding:24px}.q-number{font-size:1rem;font-weight:700;color:var(--text-muted);margin-bottom:8px}.label{display:block;font-size:.7rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;margin-bottom:10px}.q-text p{font-size:1.25rem;line-height:1.5;font-weight:500}.q-text .math{display:block;margin:16px 0;white-space:normal;overflow-wrap:break-word}.q-text .math *{white-space:normal!important}.q-divider{height:1px;background:#d6d6d6;margin:24px 0}.answer-box{background:#f8faf8;padding:20px;border-radius:16px;border:1px dashed rgba(45,213,40,.3)}.answer-box p{font-size:1.2rem;font-weight:600;color:var(--primary-dark)}.answer-box .math{display:block;margin:12px 0;white-space:normal;overflow-wrap:break-word}.answer-box .math *{white-space:normal!important}.card-footer{padding:16px 24px;display:flex;justify-content:space-between;align-items:center;background:#fafafa}.btn-notes{background:none;border:none;color:var(--primary);font-weight:600;cursor:pointer;font-size:.9rem}.pagination-v2{margin-top:40px;display:flex;align-items:center;justify-content:center;gap:24px}.pag-btn{width:50px;height:50px;border-radius:50%;border:1px solid #e0e0e0;background:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition)}.pag-btn:hover:not(:disabled){border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}.pag-btn:disabled{opacity:.3}.pag-info span{font-weight:700;color:var(--text-main)}.hub-footer{margin-top:40px;text-align:center}.hub-footer .hint{display:inline-flex;align-items:center;gap:8px;color:#999;font-size:.9rem;background:#fff;padding:12px 20px;border-radius:100px;box-shadow:var(--shadow-card)}@media(max-width:768px){.hub-header h1{font-size:2.2rem}}.su-wrapper{margin-top:14px}.su-toggle-btn{display:inline-flex;align-items:center;gap:6px;background:transparent;border:1.5px solid rgba(45,213,40,.3);color:#22a81e;border-radius:8px;padding:6px 13px;font-size:.78rem;font-weight:600;cursor:pointer;transition:all .15s}.su-toggle-btn:hover{background:#2dd5280f;border-color:#2dd528}.su-count-badge{background:#2dd5281f;color:#22a81e;border-radius:10px;padding:1px 6px;font-size:.7rem;font-weight:700}.su-limit-note{font-size:.8rem;color:#f59e0b;background:#fffbeb;border:1px solid #fde68a;border-radius:8px;padding:8px 12px}.su-panel{margin-top:10px;background:#fff;border:1px solid rgba(0,0,0,.07);border-radius:12px;padding:16px;box-shadow:0 2px 12px #0000000d;display:flex;flex-direction:column;gap:12px}.su-feedback{display:flex;align-items:center;gap:8px;padding:9px 12px;border-radius:8px;font-size:.82rem;font-weight:500}.su-feedback.ok{background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}.su-feedback.err{background:#fff1f2;color:#991b1b;border:1px solid #fecaca}.su-add-btn{align-self:flex-start;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;border-radius:8px;padding:8px 16px;font-size:.82rem;font-weight:700;cursor:pointer;transition:all .2s;box-shadow:0 3px 10px #2dd52838;display:inline-flex;align-items:center;gap:6px}.su-add-btn:hover{transform:translateY(-1px);box-shadow:0 5px 16px #2dd52852}.su-modal-overlay{position:fixed;inset:0;background:#00000080;z-index:10000;display:flex;align-items:center;justify-content:center;padding:20px}.su-modal{background:#fff;border-radius:18px;padding:32px 28px;max-width:420px;width:100%;text-align:center;box-shadow:0 20px 60px #0003}.su-modal-icon{color:#e05050;margin-bottom:16px;display:flex;justify-content:center}.su-modal h3{font-size:1.1rem;font-weight:800;color:#1a1a2e;margin:0 0 10px}.su-modal p{font-size:.85rem;color:#555;margin:0 0 10px;line-height:1.5}.su-modal-reason{background:#fff1f2;border-radius:8px;padding:8px 12px;font-size:.8rem;color:#e05050}.su-modal-warning{background:#fffbeb;border-radius:8px;padding:8px 12px;font-size:.8rem;color:#92400e}.su-modal-btn{display:inline-flex;align-items:center;gap:6px;margin-top:16px;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;border-radius:10px;padding:10px 24px;font-size:.88rem;font-weight:700;cursor:pointer;box-shadow:0 4px 14px #2dd52840}.su-blocked-banner{display:flex;align-items:center;gap:8px;padding:10px 14px;background:#fff1f2;border:1px solid #fecaca;border-radius:9px;font-size:.82rem;color:#b91c1c}.su-form-layout{display:grid;grid-template-columns:1fr 260px;gap:16px;align-items:start}@media(max-width:680px){.su-form-layout{grid-template-columns:1fr}}.su-form{background:#f9fdf9;border:1px solid rgba(45,213,40,.15);border-radius:10px;padding:16px;display:flex;flex-direction:column;gap:10px}.su-form-header{display:flex;justify-content:space-between;align-items:center;font-size:.88rem;font-weight:700;color:#222}.su-form-close{background:none;border:none;cursor:pointer;color:#bbb;display:flex;align-items:center}.su-form-close:hover{color:#777}.su-url-input{border:1.5px solid rgba(0,0,0,.12);border-radius:8px;padding:10px 13px;font-size:.87rem;outline:none;background:#fff;width:100%;box-sizing:border-box;transition:border-color .2s;font-family:Courier New,monospace}.su-url-input:focus{border-color:#2dd528}.su-spin-sm{width:13px;height:13px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:su-spin .6s linear infinite;display:inline-block}.su-instructions{background:#f8faf8;border:1px solid rgba(45,213,40,.12);border-radius:10px;padding:14px;display:flex;flex-direction:column;gap:10px}.su-inst-title{display:flex;align-items:center;gap:6px;font-size:.82rem;font-weight:700;color:#22a81e}.su-inst-list{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:5px;font-size:.78rem;color:#555;line-height:1.45}.su-inst-list a{color:#2dd528;text-decoration:none;font-weight:600}.su-inst-list a:hover{text-decoration:underline}.su-inst-tip{font-size:.75rem;color:#777;background:#fff;border-radius:7px;padding:8px 10px;line-height:1.5;border:1px solid rgba(0,0,0,.06)}.su-inst-policy{display:flex;align-items:flex-start;gap:5px;font-size:.72rem;color:#e05050;line-height:1.4}.su-submit-btn{display:flex;align-items:center;justify-content:center;gap:7px;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;border-radius:8px;padding:9px;font-size:.85rem;font-weight:700;cursor:pointer;transition:all .2s;box-shadow:0 3px 10px #2dd52833}.su-submit-btn:disabled{opacity:.55;cursor:not-allowed}.su-submit-btn:not(:disabled):hover{transform:translateY(-1px)}.su-loading{display:flex;align-items:center;gap:8px;font-size:.8rem;color:#aaa;padding:6px 0}.su-spinner{width:14px;height:14px;border:2px solid rgba(45,213,40,.2);border-top-color:#2dd528;border-radius:50%;animation:su-spin .7s linear infinite}@keyframes su-spin{to{transform:rotate(360deg)}}.su-empty{font-size:.8rem;color:#bbb;text-align:center;padding:10px 0}.su-solution-card{background:#fff;border:1px solid rgba(0,0,0,.07);border-radius:10px;padding:12px;display:flex;flex-direction:column;gap:8px;box-shadow:0 1px 6px #0000000a}.su-sol-header{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.su-sol-avatar{width:28px;height:28px;background:#2dd5281a;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#22a81e;flex-shrink:0}.su-sol-author{font-size:.8rem;font-weight:600;color:#333;display:block}.su-sol-time{font-size:.7rem;color:#bbb;display:flex;align-items:center;gap:3px;margin-top:1px}.su-sol-answer{margin-left:auto;font-size:.78rem;color:#666;white-space:nowrap}.su-sol-answer strong{color:#166534}.su-sol-img{max-width:100%;max-height:220px;border-radius:8px;object-fit:contain;border:1px solid rgba(0,0,0,.07);cursor:zoom-in;display:block}.su-sol-img-wrap{display:flex;flex-direction:column;gap:6px}.su-view-btn{display:inline-flex;align-items:center;gap:5px;background:#2dd52814;border:1px solid rgba(45,213,40,.2);color:#22a81e;border-radius:7px;padding:5px 12px;font-size:.78rem;font-weight:600;cursor:pointer;text-decoration:none;align-self:flex-start;transition:all .15s}.su-view-btn:hover{background:#2dd528;color:#fff;border-color:#2dd528}.su-sol-actions{display:flex;gap:8px}.su-action-btn{display:flex;align-items:center;gap:5px;background:#f5f5f5;border:1px solid rgba(0,0,0,.08);border-radius:7px;padding:5px 11px;font-size:.76rem;color:#777;cursor:pointer;transition:all .15s}.su-action-btn:hover{background:#f0fdf4;border-color:#2dd52840;color:#22a81e}.su-action-btn.upvoted{background:#f0fdf4;border-color:#2dd528;color:#166534;font-weight:600}.su-report-btn{color:#f59e0b}.su-report-btn:hover:not(:disabled){background:#fffbeb;border-color:#f59e0b}.su-report-btn.reported{color:#e05050;border-color:#dc505033;background:#fff1f2;cursor:not-allowed}.su-report-btn:disabled{opacity:.6;cursor:not-allowed}.su-report-count{font-size:.68rem;color:#e05050}.su-removed-tag{margin-left:auto;font-size:.7rem;color:#e05050;background:#fff1f2;border:1px solid #fecaca;border-radius:5px;padding:1px 7px}.su-no-image{background:#f9f9f9;border:1px dashed #ddd;border-radius:8px;padding:14px;text-align:center;font-size:.8rem;color:#bbb}.su-no-comments{font-size:.78rem;color:#ccc;margin:0 0 6px}.su-comments{background:#f9f9f9;border:1px solid rgba(0,0,0,.06);border-radius:8px;padding:10px;display:flex;flex-direction:column;gap:7px}.su-comment{font-size:.79rem;color:#555;line-height:1.45}.su-comment strong{color:#333}.su-c-time{font-size:.68rem;color:#ccc;margin-left:8px}.su-comment-input-row{display:flex;gap:6px;margin-top:4px}.su-comment-input{flex:1;border:1.5px solid rgba(0,0,0,.1);border-radius:7px;padding:6px 10px;font-size:.78rem;outline:none;background:#fff}.su-comment-input:focus{border-color:#2dd528}.su-comment-send{background:#2dd5281a;border:1px solid rgba(45,213,40,.2);border-radius:7px;width:30px;height:30px;display:flex;align-items:center;justify-content:center;color:#22a81e;cursor:pointer;transition:background .15s;flex-shrink:0}.su-comment-send:hover{background:#2dd528;color:#fff;border-color:#2dd528}:root{--primary: #2dd528;--primary-dark: #15de29;--bg-page: #f9fbf9;--text-main: #2D3436;--text-muted: #636E72;--white: #FFFFFF;--shadow-sm: 0 4px 12px rgba(0, 0, 0, .05);--shadow-md: 0 12px 30px rgba(0, 0, 0, .08);--transition: all .3s cubic-bezier(.165, .84, .44, 1)}.formulas-wrapper{min-height:100vh;background:var(--bg-page);color:var(--text-main);font-family:Inter,Poppins,sans-serif;padding:90px 4% 40px}.formulas-container{max-width:1400px;margin:0 auto;position:relative}.formulas-title-section{margin-top:24px}.formulas-badge{display:inline-block;padding:6px 14px;background:#2dd5281a;color:var(--primary-dark);border-radius:100px;font-weight:700;font-size:.75rem;text-transform:uppercase}.formulas-main-title{font-size:3rem;font-weight:800;margin-top:10px;animation:revealUp .6s cubic-bezier(.22,1,.36,1) both}.formulas-main-title .highlight{color:var(--primary)}.formulas-content{display:grid;grid-template-columns:280px 1fr;gap:40px;margin-top:40px}.formulas-sidebar{background:#fff;padding:24px;border-radius:24px;box-shadow:var(--shadow-sm);border:1px solid rgba(0,0,0,.03);position:sticky;top:40px}.sidebar-label{font-size:.75rem;color:var(--text-muted);font-weight:700;margin-bottom:20px}.chapter-list{display:flex;flex-direction:column;gap:10px}.chapter-pill{display:flex;align-items:center;gap:14px;padding:14px 18px;border-radius:14px;border:1px solid transparent;background:transparent;cursor:pointer;transition:var(--transition)}.chapter-pill .pill-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:#f8fbf8;color:var(--text-muted);border-radius:10px}.chapter-pill.active{background:#f1fbf1;color:var(--primary-dark)}.chapter-pill.active .pill-icon{background:var(--primary);color:#fff;box-shadow:0 4px 10px #2dd5284d}.results-header h2{font-size:2rem;font-weight:800}.formula-card{background:#fff;border-radius:24px;padding:32px;box-shadow:var(--shadow-sm);margin-bottom:24px}.formula-render{padding:40px 20px;background:#fdfdfd;border-radius:16px;border:1px solid #f6f6f6;overflow-x:auto;display:flex;justify-content:center}.btn-copy{background:none;border:none;color:var(--primary);font-weight:600;cursor:pointer}:root{--primary: #2dd528;--primary-dark: #22c522;--primary-soft: rgba(45, 213, 40, .1);--bg-page: #f8fbf8;--text-main: #1a1a1a;--text-muted: #636e72;--white: #ffffff;--border: #f0f0f0;--shadow-sm: 0 4px 12px rgba(0, 0, 0, .04);--shadow-md: 0 12px 40px rgba(0, 0, 0, .08);--transition: all .3s cubic-bezier(.165, .84, .44, 1)}*{box-sizing:border-box;margin:0;padding:0}body,html{min-height:100vh;background:var(--bg-page);color:var(--text-main);font-family:Inter,-apple-system,sans-serif;line-height:1.5}.test-wrapper{min-height:100vh;display:flex;justify-content:center;align-items:flex-start;padding:90px 4% 60px}.test-container{max-width:1000px;width:100%}.setup-pane{background:var(--white);border-radius:32px;padding:48px;box-shadow:var(--shadow-md);border:1px solid var(--border);animation:slideUp .6s ease forwards}.setup-header{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:36px}.setup-icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,#28e028,#22c522);display:flex;align-items:center;justify-content:center;color:#fff}.setup-header h1{font-size:2rem;font-weight:800;letter-spacing:-.5px;color:#111}.setup-header p{font-size:1rem;color:#777}.setup-field{margin-bottom:28px}.setup-field label{display:block;font-weight:700;font-size:.9rem;color:#333;margin-bottom:10px;text-transform:uppercase;letter-spacing:.5px}.setup-input-row{display:flex;align-items:center;gap:12px}.setup-input-row input{padding:12px 16px;border-radius:12px;border:2px solid #eee;width:100px;font-size:1rem;font-weight:700;text-align:center;outline:none;transition:var(--transition)}.setup-input-row input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2dd5281a}.setup-hint{font-size:.85rem;color:#999}.chapter-pills-grid{display:flex;flex-wrap:wrap;gap:10px}.chapter-pill{padding:10px 20px;border-radius:100px;background:#f8fbf8;border:1.5px solid #f0f3f0;font-weight:600;font-size:.9rem;cursor:pointer;color:#333;transition:var(--transition)}.chapter-pill:hover{border-color:var(--primary);color:var(--primary-dark);background:#fff}.chapter-pill.selected{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 6px 16px #2dd52840}.btn-start{display:inline-flex;align-items:center;gap:8px;margin-top:12px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;border:none;padding:16px 40px;border-radius:14px;font-weight:700;font-size:1.05rem;cursor:pointer;transition:var(--transition);box-shadow:0 10px 24px #2dd52840}.btn-start:hover{transform:translateY(-2px);box-shadow:0 14px 32px #2dd52859}.results-screen{display:flex;justify-content:center;animation:fadeIn .5s ease forwards}.results-card{background:#fff;border-radius:32px;padding:48px;box-shadow:var(--shadow-md);border:1px solid var(--border);width:100%;max-width:640px;display:flex;flex-direction:column;align-items:center;gap:28px;animation:slideUp .6s ease forwards}.results-header{text-align:center}.results-trophy{color:#ffc107;margin-bottom:12px;animation:trophyPop .6s cubic-bezier(.68,-.55,.265,1.55) both}.results-header h1{font-size:1.8rem;font-weight:800;color:#111;margin-bottom:6px}.results-header p{font-size:1rem;color:#777}@keyframes trophyPop{0%{transform:scale(0) rotate(-20deg);opacity:0}to{transform:scale(1) rotate(0);opacity:1}}.performance-ring-wrap{position:relative;width:180px;height:180px;display:flex;align-items:center;justify-content:center}.performance-ring{transform:rotate(-90deg)}.ring-bg{fill:none;stroke:#f0f0f0;stroke-width:10}.ring-progress{fill:none;stroke:url(#ringGradient);stroke-width:10;stroke-linecap:round}.ring-label{position:absolute;display:flex;flex-direction:column;align-items:center}.ring-percent{font-size:2.4rem;font-weight:800;color:#111}.ring-sub{font-size:.85rem;color:#888;font-weight:600}.results-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;width:100%}.result-stat{background:#f8fbf8;border-radius:18px;padding:20px 12px;display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center;border:1px solid rgba(0,0,0,.03);transition:var(--transition)}.result-stat:hover{transform:translateY(-3px);box-shadow:0 8px 20px #0000000d}.result-stat-icon{width:36px;height:36px;border-radius:10px;background:#2dd52814;display:flex;align-items:center;justify-content:center;color:#22c522}.result-stat-icon.fire{background:#ff572214;color:#ff5722}.result-stat-icon.gold{background:#ffc1071f;color:#ffc107}.result-stat-value{font-size:1.3rem;font-weight:800;color:#111}.result-stat-label{font-size:.75rem;color:#888;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.chapter-breakdown{width:100%;background:#f8fbf8;border-radius:18px;padding:24px;border:1px solid rgba(0,0,0,.03)}.chapter-breakdown h3{font-size:.9rem;font-weight:700;color:#333;margin-bottom:16px;display:flex;align-items:center;gap:8px;text-transform:uppercase;letter-spacing:.5px}.breakdown-row{display:flex;align-items:center;gap:12px;margin-bottom:12px}.breakdown-name{font-size:.85rem;font-weight:600;color:#555;min-width:100px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.breakdown-bar-wrap{flex:1;display:flex;align-items:center;gap:10px}.breakdown-bar{flex:1;height:8px;background:#eee;border-radius:4px;overflow:hidden}.breakdown-fill{height:100%;background:linear-gradient(90deg,#28e028,#22c522);border-radius:4px;transition:width 1s ease-out}.breakdown-pct{font-size:.8rem;font-weight:700;color:#333;min-width:36px;text-align:right}.results-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;width:100%}.results-actions button{display:inline-flex;align-items:center;gap:6px;padding:12px 24px;border-radius:12px;font-weight:700;font-size:.9rem;cursor:pointer;transition:var(--transition);border:none}.btn-review{background:linear-gradient(135deg,#28e028,#22c522);color:#fff;box-shadow:0 6px 16px #2dd52840}.btn-review:hover{transform:translateY(-2px);box-shadow:0 10px 24px #2dd52859}.btn-retry{background:#f8fbf8;color:#333;border:1.5px solid #eee!important}.btn-retry:hover{background:#f0f0f0}.btn-home{background:#1a1a2e;color:#fff}.btn-home:hover{background:#2a2a3e}.review-screen{animation:fadeIn .4s ease forwards}.review-card{background:#fff;border-radius:28px;padding:36px;box-shadow:var(--shadow-md);border:1px solid var(--border)}.review-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px}.review-header h2{font-size:1.3rem;font-weight:800;color:#111;display:flex;align-items:center;gap:8px}.btn-close-review{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:10px;background:#f8f8f8;color:#555;font-weight:600;font-size:.85rem;border:none;cursor:pointer;transition:var(--transition)}.btn-close-review:hover{background:#eee}.review-list{display:flex;flex-direction:column;gap:14px}.review-item{background:#fafafa;border-radius:16px;padding:20px;border:2px solid transparent;transition:var(--transition)}.review-item.correct{border-color:#2dd52833;background:#2dd52808}.review-item.wrong{border-color:#e74c3c33;background:#e74c3c08}.review-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.review-num{font-size:.8rem;font-weight:800;color:#888;text-transform:uppercase;letter-spacing:.5px}.review-icon.correct{color:#28e028}.review-icon.wrong{color:#e74c3c}.review-q{font-size:1rem;font-weight:600;color:#222;margin-bottom:10px;line-height:1.4}.review-meta{display:flex;gap:16px;flex-wrap:wrap}.review-ans{font-size:.85rem;color:#666;font-weight:500}.review-correct{font-size:.85rem;color:#28e028;font-weight:700}.exam-container{max-width:1100px;width:100%;margin:0 auto;animation:fadeIn .4s ease forwards}.exam-topbar{display:flex;align-items:center;justify-content:space-between;background:#fff;border-radius:16px;padding:16px 24px;box-shadow:var(--shadow-sm);border:1px solid var(--border);margin-bottom:20px;gap:16px;flex-wrap:wrap}.exam-progress-info{display:flex;align-items:center;gap:16px;flex:1;min-width:200px}.exam-q-num{font-size:1.1rem;font-weight:800;color:#111;white-space:nowrap}.exam-q-total{font-weight:500;color:#aaa}.exam-progress-bar{flex:1;height:8px;background:#f0f0f0;border-radius:4px;overflow:hidden}.exam-progress-fill{height:100%;background:linear-gradient(90deg,#28e028,#22c522);border-radius:4px;transition:width .3s ease}.exam-timer{display:flex;align-items:center;gap:8px;font-size:1.1rem;font-weight:800;color:#22c522;font-family:JetBrains Mono,monospace;background:#2dd5280f;padding:8px 14px;border-radius:10px}.exam-timer.urgent{color:#e74c3c;background:#e74c3c0f;animation:pulseUrgent 1s ease infinite}@keyframes pulseUrgent{0%,to{opacity:1}50%{opacity:.6}}.exam-body{display:grid;grid-template-columns:220px 1fr;gap:24px}.exam-sidebar{background:#fff;border-radius:20px;padding:24px;height:fit-content;position:sticky;top:20px;box-shadow:var(--shadow-sm);border:1px solid var(--border);display:flex;flex-direction:column;gap:20px}.sidebar-title{font-size:.8rem;font-weight:700;color:#888;text-transform:uppercase;letter-spacing:1px}.question-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.q-grid-btn{width:36px;height:36px;border-radius:10px;border:2px solid #eee;background:#fff;font-size:.8rem;font-weight:700;color:#666;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;padding:0}.q-grid-btn:hover{border-color:#ccc}.q-grid-btn.active{border-color:var(--primary);background:var(--primary);color:#fff;box-shadow:0 4px 12px #2dd5284d}.q-grid-btn.answered{border-color:#2dd52866;background:#2dd5280f;color:var(--primary-dark)}.q-grid-btn.answered.active{background:var(--primary);color:#fff}.sidebar-summary{display:flex;flex-direction:column;gap:8px;padding-top:12px;border-top:1px solid #f0f0f0}.sum-row{display:flex;align-items:center;gap:8px;font-size:.8rem;color:#666;font-weight:500}.sum-dot{width:10px;height:10px;border-radius:50%;background:#eee;border:2px solid #ddd}.sum-dot.answered{background:#2dd52833;border-color:var(--primary)}.btn-submit-sidebar{display:flex;align-items:center;justify-content:center;gap:6px;padding:12px;border-radius:12px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;font-weight:700;font-size:.9rem;border:none;cursor:pointer;transition:var(--transition);margin-top:4px}.btn-submit-sidebar:hover{transform:translateY(-2px);box-shadow:0 8px 20px #2dd5284d}.exam-main{width:100%}.question-pane{background:#fff;border-radius:24px;padding:40px;box-shadow:var(--shadow-md);border:1px solid var(--border);display:flex;flex-direction:column;gap:28px}.q-badge{display:inline-block;width:fit-content;background:#2dd52814;color:#22c522;padding:6px 14px;border-radius:8px;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.q-content{font-size:1.4rem;font-weight:600;line-height:1.45;color:#111}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.option-btn{background:#fdfdfd;border:2px solid #f0f0f0;padding:18px 20px;border-radius:16px;font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);text-align:left;display:flex;align-items:center;gap:12px}.option-btn:hover{border-color:#2dd5284d;background:#fff}.option-btn.selected{border-color:var(--primary);background:#2dd5280a;color:var(--primary-dark);box-shadow:0 4px 12px #2dd52814}.opt-label{width:32px;height:32px;border-radius:50%;background:#f0f0f0;display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:700;color:#666;flex-shrink:0;transition:var(--transition)}.option-btn.selected .opt-label{background:linear-gradient(135deg,#28e028,#22c522);color:#fff}.opt-text{line-height:1.4}.exam-nav{display:flex;gap:12px;margin-top:8px}.btn-prev,.btn-next,.btn-submit{display:inline-flex;align-items:center;gap:6px;padding:14px 28px;border-radius:14px;font-weight:700;font-size:.95rem;cursor:pointer;transition:var(--transition);border:none}.btn-prev{background:#f8f8f8;color:#333;border:1.5px solid #eee!important}.btn-prev:hover:not(:disabled){background:#f0f0f0}.btn-prev:disabled{opacity:.4;cursor:not-allowed}.btn-next{background:linear-gradient(135deg,#28e028,#22c522);color:#fff;margin-left:auto;box-shadow:0 6px 16px #2dd52840}.btn-next:hover{transform:translateY(-2px);box-shadow:0 10px 24px #2dd52859}.btn-submit{background:linear-gradient(135deg,#1a1a2e,#2a2a3e);color:#fff;margin-left:auto}.btn-submit:hover{transform:translateY(-2px);box-shadow:0 10px 24px #0003}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media(max-width:900px){.exam-body{grid-template-columns:1fr}.exam-sidebar{position:static;flex-direction:row;flex-wrap:wrap}.question-grid{grid-template-columns:repeat(8,1fr)}.results-stats-grid{grid-template-columns:repeat(2,1fr)}.options-grid{grid-template-columns:1fr}.setup-pane{padding:32px}}@media(max-width:480px){.setup-header h1{font-size:1.6rem}.q-content{font-size:1.15rem}.results-card{padding:28px}.question-pane{padding:24px}.exam-topbar{padding:12px 16px}.results-stats-grid{grid-template-columns:repeat(2,1fr);gap:10px}.result-stat-value{font-size:1.1rem}.performance-ring-wrap{transform:scale(.85)}}.difficulty-pills{display:flex;gap:10px;flex-wrap:wrap}.diff-pill{padding:9px 20px;border-radius:100px;border:2px solid #eee;background:#f8fbf8;font-weight:600;font-size:.88rem;cursor:pointer;transition:var(--transition);color:#555}.diff-pill.selected,.diff-pill:hover{border-color:var(--primary);color:var(--primary-dark);background:#fff}.diff-pill.selected{background:var(--primary);color:#fff;box-shadow:0 4px 12px #2dd52840}.diff-pill.diff-easy.selected{background:#2ecc71;border-color:#2ecc71;box-shadow:0 4px 12px #2ecc714d}.diff-pill.diff-medium.selected{background:#f39c12;border-color:#f39c12;box-shadow:0 4px 12px #f39c124d}.diff-pill.diff-hard.selected{background:#e74c3c;border-color:#e74c3c;box-shadow:0 4px 12px #e74c3c4d}.diff-pill.diff-mixed.selected{background:linear-gradient(135deg,#28e028,#22c522);border-color:transparent}.chapters-label-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.chapters-label-row label{margin-bottom:0}.chapter-actions{display:flex;gap:8px}.ch-action-btn{padding:4px 12px;border-radius:8px;border:1.5px solid #ddd;background:#fff;font-size:.78rem;font-weight:700;color:#555;cursor:pointer;transition:var(--transition)}.ch-action-btn:hover{border-color:var(--primary);color:var(--primary-dark)}.chapters-loading{display:flex;align-items:center;gap:10px;color:#888;font-size:.9rem;padding:16px 0}.spin-icon{animation:spinAnim 1s linear infinite}@keyframes spinAnim{to{transform:rotate(360deg)}}.chapters-empty{display:flex;flex-direction:column;align-items:center;gap:10px;padding:32px 20px;border:2px dashed rgba(45,213,40,.2);border-radius:16px;background:#2dd52805;color:#888;text-align:center}.chapters-empty.error{border-color:#e74c3c33;background:#e74c3c05;color:#c0392b}.chapters-empty h3{font-size:1rem;font-weight:700;color:#444;margin:0}.chapters-empty p{font-size:.88rem;color:#777;max-width:380px}.chapters-empty code{background:#f0f0f0;padding:6px 14px;border-radius:8px;font-size:.82rem;color:#333;font-family:JetBrains Mono,monospace}.setup-error{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#e74c3c0f;border:1px solid rgba(231,76,60,.2);border-radius:10px;color:#c0392b;font-size:.88rem;font-weight:500;margin-bottom:8px}.btn-start:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}.q-meta-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.q-diff-badge{display:inline-block;padding:4px 10px;border-radius:6px;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.q-diff-badge.diff-easy{background:#2ecc711a;color:#27ae60}.q-diff-badge.diff-medium{background:#f39c121a;color:#d68910}.q-diff-badge.diff-hard{background:#e74c3c1a;color:#c0392b}.review-chapter{font-size:.75rem;font-weight:600;color:#aaa;background:#f0f0f0;padding:2px 8px;border-radius:6px}.review-options{display:flex;flex-direction:column;gap:6px;margin-top:10px}.review-opt{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:10px;font-size:.88rem;background:#f8f8f8;border:1.5px solid transparent}.review-opt.correct-opt{background:#2dd5280f;border-color:#2dd5284d;color:#1a7a1a;font-weight:600}.review-opt.wrong-opt{background:#e74c3c0d;border-color:#e74c3c40;color:#c0392b}.review-opt-label{width:24px;height:24px;border-radius:50%;background:#e8e8e8;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;flex-shrink:0}.review-opt.correct-opt .review-opt-label{background:#28e028;color:#fff}.review-opt.wrong-opt .review-opt-label{background:#e74c3c;color:#fff}.review-explanation{margin-top:10px;padding:10px 14px;background:#3498db0f;border-left:3px solid #3498db;border-radius:0 8px 8px 0;font-size:.85rem;color:#2c3e50;line-height:1.5}.katex{font-size:1.05em}.math-block{display:block;text-align:center;margin:6px 0;overflow-x:auto}.opt-text .katex-display,.review-opt .katex-display{overflow-x:auto;overflow-y:hidden;max-width:100%}.q-content .katex{font-size:1.1em}.review-explanation .katex{font-size:1em}.forum-wrapper{padding:90px 4% 40px;min-height:100vh;position:relative;background:linear-gradient(135deg,#f0fdf4,#fff,#ecfdf5)}.forum-container{max-width:1200px;margin:0 auto}.forum-header{margin-bottom:24px}.back-link{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;background:#28e02814;color:#22c522;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;margin-bottom:16px;transition:all .2s}.auth-prompt{background:linear-gradient(135deg,#fff3cd,#ffeeba);border:1px solid #ffc107;color:#856404;padding:10px 16px;border-radius:10px;font-size:13px;margin-bottom:12px;animation:authPop .3s ease}@keyframes authPop{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.forum-intro h1{font-size:2.6rem;font-weight:800;color:#111;margin-bottom:6px;animation:revealUp .6s cubic-bezier(.22,1,.36,1) both}.forum-intro .highlight{background:linear-gradient(135deg,#28e028,#22c522);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}.forum-intro p{color:#666;font-size:1.05rem;animation:revealUp .6s .1s cubic-bezier(.22,1,.36,1) both}.forum-badge{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;padding:6px 14px;border-radius:20px;font-size:12px;font-weight:600;margin-bottom:10px;animation:revealUp .5s cubic-bezier(.22,1,.36,1) both}.forum-toolbar{display:flex;gap:12px;margin-bottom:16px;align-items:center}.search-bar{flex:1;display:flex;align-items:center;gap:10px;background:#fffc;border:1px solid rgba(40,224,40,.12);border-radius:12px;padding:10px 14px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.search-bar input{flex:1;border:none;outline:none;font-size:14px;background:transparent;color:#333}.search-bar input::placeholder{color:#aaa}.btn-create-post{display:flex;align-items:center;gap:6px;padding:10px 18px;border:none;border-radius:12px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;font-size:14px;font-weight:600;cursor:pointer;box-shadow:0 4px 14px #28e02859;white-space:nowrap}.tag-filter-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:20px;padding:10px 14px;background:#ffffffb3;border:1px solid rgba(40,224,40,.1);border-radius:12px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.tag-pill{padding:5px 12px;border-radius:20px;border:1px solid rgba(40,224,40,.2);background:#fff;font-size:12px;color:#555;cursor:pointer;transition:all .2s}.tag-pill.active{background:linear-gradient(135deg,#28e028,#22c522);color:#fff;border-color:transparent;box-shadow:0 2px 8px #28e0284d}.create-post-card{background:#ffffffd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(40,224,40,.15);border-radius:16px;padding:20px;margin-bottom:20px;box-shadow:0 4px 20px #0000000d;overflow:hidden}.create-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.create-header h3{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600;color:#222}.close-btn{width:28px;height:28px;border-radius:50%;border:none;background:#0000000d;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#666}.create-input,.create-textarea{width:100%;padding:12px 14px;border:2px solid rgba(40,224,40,.12);border-radius:10px;font-size:14px;outline:none;margin-bottom:10px;background:#fff;transition:all .2s}.create-input:focus,.create-textarea:focus{border-color:#28e028;box-shadow:0 0 0 3px #28e02814}.create-textarea{resize:vertical;min-height:80px}.tag-select{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:12px;font-size:13px;color:#666}.tag-choices{display:flex;flex-wrap:wrap;gap:6px}.tag-choice{padding:5px 10px;border-radius:16px;border:1px solid rgba(40,224,40,.25);background:#fff;font-size:12px;color:#555;cursor:pointer;transition:all .2s}.tag-choice.selected{background:linear-gradient(135deg,#28e028,#22c522);color:#fff;border-color:transparent}.image-upload-row{display:flex;align-items:center;gap:12px;margin:10px 0}.image-upload-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border:1px dashed rgba(40,224,40,.4);background:#28e0280d;color:#22c522;border-radius:10px;font-size:13px;cursor:pointer;transition:all .2s}.image-upload-btn:hover{background:#28e0281a}.image-preview{position:relative;width:60px;height:60px;border-radius:8px;overflow:hidden;border:1px solid rgba(40,224,40,.15)}.image-preview img{width:100%;height:100%;object-fit:cover}.remove-image{position:absolute;top:2px;right:2px;width:18px;height:18px;border:none;border-radius:50%;background:#00000080;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;padding:0}.btn-submit{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:12px;border:none;border-radius:10px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;font-size:14px;font-weight:600;cursor:pointer;box-shadow:0 4px 14px #28e0284d}.posts-feed{display:flex;flex-direction:column;gap:14px}.feed-loading,.feed-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:#888;gap:12px}.feed-spinner{width:32px;height:32px;border:3px solid rgba(40,224,40,.15);border-top-color:#28e028;border-radius:50%;animation:spin 1s linear infinite}.feed-empty h3{font-size:18px;color:#555;margin:0}.feed-empty p{font-size:14px;color:#999}.post-card{background:#fffffff2;border:1px solid rgba(40,224,40,.1);border-radius:18px;padding:22px;box-shadow:0 2px 12px #00000008;transition:transform .3s,box-shadow .3s;transform-style:preserve-3d}.post-card:hover{transform:perspective(900px) rotateX(.5deg) rotateY(-.5deg) translateY(-3px);box-shadow:0 8px 24px #0000000f}.post-header{margin-bottom:10px}.post-author{display:flex;align-items:center;gap:10px}.author-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#28e028,#22c522);display:flex;align-items:center;justify-content:center;color:#fff}.author-name{font-size:13px;font-weight:600;color:#333;display:block}.post-time{font-size:11px;color:#999;display:flex;align-items:center;gap:4px}.post-title{font-size:17px;font-weight:700;color:#111;margin:0 0 6px;line-height:1.3}.post-content{font-size:14px;color:#555;line-height:1.5;margin-bottom:10px}.post-image{margin:10px 0;border-radius:10px;overflow:hidden;max-height:340px;cursor:pointer;position:relative}.post-image img{width:100%;height:100%;object-fit:contain;object-position:center;background:#f8f8f8;display:block;max-height:340px;transition:opacity .2s}.post-image:hover img{opacity:.92}.post-image:after{content:"🔍 Click to expand";position:absolute;bottom:8px;right:10px;background:#00000073;color:#fff;font-size:11px;padding:3px 8px;border-radius:6px;pointer-events:none;opacity:0;transition:opacity .2s}.post-image:hover:after{opacity:1}.lightbox-overlay{position:fixed;inset:0;background:#000000e0;z-index:9999;display:flex;align-items:center;justify-content:center;padding:20px;animation:lbFadeIn .2s ease;cursor:zoom-out}@keyframes lbFadeIn{0%{opacity:0}to{opacity:1}}.lightbox-overlay img{max-width:92vw;max-height:90vh;object-fit:contain;border-radius:10px;box-shadow:0 20px 60px #0009;animation:lbZoomIn .2s cubic-bezier(.22,1,.36,1);cursor:default}@keyframes lbZoomIn{0%{transform:scale(.88);opacity:0}to{transform:scale(1);opacity:1}}.lightbox-close{position:fixed;top:16px;right:20px;width:38px;height:38px;border-radius:50%;border:none;background:#ffffff26;color:#fff;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s;z-index:10000}.lightbox-close:hover{background:#ffffff47}.post-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}.post-tag{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:12px;font-size:11px;font-weight:500}.post-actions{display:flex;gap:14px;padding-top:10px;border-top:1px solid rgba(0,0,0,.05)}.action-btn{display:flex;align-items:center;gap:5px;padding:6px 12px;border:none;background:#00000008;border-radius:8px;font-size:13px;color:#666;cursor:pointer;transition:all .2s}.action-btn:hover{background:#28e0281a;color:#28e028}.action-btn.like:hover svg{fill:#28e028;stroke:#28e028}.comments-section{margin-top:12px;padding-top:12px;border-top:1px solid rgba(0,0,0,.05);overflow:hidden}.comment-input-wrap{display:flex;gap:8px;margin-bottom:10px}.comment-input{flex:1;padding:10px 14px;border:1px solid rgba(40,224,40,.15);border-radius:10px;font-size:14px;outline:none;background:#fff}.comment-input:focus{border-color:#28e028}.comment-send{width:38px;height:38px;border-radius:10px;border:none;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0}.comments-list{display:flex;flex-direction:column;gap:8px}.no-comments{font-size:13px;color:#aaa;text-align:center;padding:10px 0}.comment-item{display:flex;gap:10px;padding:10px;background:#00000005;border-radius:10px}.comment-avatar{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,#22c522,#1a9e1a);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.comment-body{flex:1}.comment-meta{display:flex;align-items:center;gap:8px;margin-bottom:2px}.comment-author{font-size:12px;font-weight:600;color:#333}.comment-time{font-size:11px;color:#aaa}.comment-text{font-size:13px;color:#555;margin:0;line-height:1.4}@media(max-width:640px){.forum-wrapper{padding:20px 4% 24px}.forum-toolbar{flex-direction:column;align-items:stretch}.btn-create-post{justify-content:center}.forum-intro h1{font-size:1.8rem}}:root{--primary: #2dd528;--primary-dark: #15de29;--bg-page: #f9fbf9;--text-main: #2D3436;--text-muted: #636E72;--shadow-md: 0 12px 30px rgba(0, 0, 0, .08)}.contact-wrapper{min-height:100vh;background:var(--bg-page);color:var(--text-main);font-family:Inter,sans-serif;padding:90px 4% 80px}.contact-header{padding:16px 0 32px;max-width:1200px;margin:0 auto}.back-link{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;background:#28e02814;color:#22c522;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;margin-bottom:20px;transition:all .2s}.contact-intro h1{font-size:2.8rem;font-weight:800;margin-bottom:12px;animation:revealUp .6s cubic-bezier(.22,1,.36,1) both}.contact-intro p{animation:revealUp .6s .1s cubic-bezier(.22,1,.36,1) both}.contact-intro .highlight{color:var(--primary)}.contact-badge{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;padding:6px 14px;border-radius:20px;font-size:12px;font-weight:600;margin-bottom:12px;animation:revealUp .5s cubic-bezier(.22,1,.36,1) both}.contact-grid{display:grid;grid-template-columns:320px 1fr;gap:40px;max-width:1200px;margin:0 auto;padding:0}@media(max-width:768px){.contact-grid{grid-template-columns:1fr}.contact-intro h1{font-size:2rem}}.info-card,.form-card{background:#fff;padding:40px;border-radius:32px;box-shadow:var(--shadow-md);border:1px solid rgba(0,0,0,.03)}.info-text span{font-weight:600;color:var(--primary)}.input-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}.input-group{display:flex;align-items:center;background:#f8faf8;border:1.5px solid #f0f3f0;border-radius:16px;padding:0 16px;transition:.3s}.input-group:focus-within{border-color:var(--primary);background:#fff}.input-group input,.input-group textarea{width:100%;border:none;background:transparent;padding:16px 12px;font-size:.95rem;outline:none}.btn-submit{width:100%;display:flex;align-items:center;justify-content:center;gap:12px;background:var(--primary);color:#fff;border:none;padding:16px;border-radius:14px;font-weight:700;cursor:pointer;transition:.3s;box-shadow:0 10px 20px #2dd52833}.btn-submit:hover{transform:translateY(-3px);background:var(--primary-dark)}.success-hint{display:flex;align-items:center;gap:10px;background:linear-gradient(135deg,#2dd5281f,#2dd5280d);color:#137a13;border:1px solid rgba(45,213,40,.22);border-radius:14px;padding:13px 14px;margin:0 0 16px;font-weight:700;box-shadow:0 8px 18px #2dd52814;animation:revealUp .35s cubic-bezier(.22,1,.36,1) both}.error-hint{color:#c62828;background:#ffebee;border:1px solid rgba(198,40,40,.16);border-radius:12px;padding:12px 14px;margin:0 0 16px;font-weight:600}.submission-card-v2{background:#fff;padding:24px;border-radius:24px;display:flex;gap:20px;border:1px solid #f0f0f0;transition:.3s;margin-top:16px}.sub-avatar{width:44px;height:44px;background:#f1fbf1;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--primary-dark)}:root{--primary: #2dd528;--primary-dark: #15de29;--bg-page: #f9fbf9;--text-main: #2D3436;--text-muted: #636E72;--white: #FFFFFF;--shadow-card: 0 4px 20px rgba(0, 0, 0, .04);--shadow-hover: 0 12px 30px rgba(45, 213, 40, .1);--transition: all .3s cubic-bezier(.165, .84, .44, 1)}.pre-exercise-page{min-height:100vh;background:var(--bg-page);color:var(--text-main);font-family:Inter,Poppins,sans-serif;padding-top:90px}.page-header{padding:16px 4%;display:flex;justify-content:space-between;align-items:center;max-width:1400px;margin:0 auto}.back-link{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;background:#28e02814;color:#22c522;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s}.back-link:hover{background:#28e02826}.topic-indicator{display:flex;align-items:center;gap:10px;font-size:.9rem;color:var(--text-muted);background:#fff;padding:8px 16px;border-radius:100px;box-shadow:var(--shadow-card)}.topic-indicator .dot{width:8px;height:8px;background:var(--primary);border-radius:50%;box-shadow:0 0 8px var(--primary)}.header-actions{display:flex;align-items:center;gap:16px}.hub-container{max-width:1200px;margin:0 auto;padding:24px 4% 60px}.hub-header{text-align:center;margin-bottom:48px}.hub-badge{display:inline-block;padding:6px 14px;background:#2dd5281a;color:#22c522;border-radius:100px;font-weight:700;font-size:.7rem;text-transform:uppercase;margin-bottom:16px;animation:revealUp .6s cubic-bezier(.22,1,.36,1) both}.hub-header h1{font-size:3.2rem;font-weight:800;animation:revealUp .6s .1s cubic-bezier(.22,1,.36,1) both}.hub-header p{animation:revealUp .6s .2s cubic-bezier(.22,1,.36,1) both}.hub-header .highlight{color:var(--primary)}.topic-cards-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.topic-card-v2{background:#fff;padding:22px 24px;border-radius:18px;display:flex;align-items:center;gap:16px;cursor:pointer;border:1px solid rgba(0,0,0,.03);box-shadow:var(--shadow-card);transition:var(--transition);transform-style:preserve-3d;animation:revealUp .5s cubic-bezier(.22,1,.36,1) both}.topic-cards-grid .topic-card-v2:nth-child(1){animation-delay:.04s}.topic-cards-grid .topic-card-v2:nth-child(2){animation-delay:.08s}.topic-cards-grid .topic-card-v2:nth-child(3){animation-delay:.12s}.topic-cards-grid .topic-card-v2:nth-child(4){animation-delay:.16s}.topic-cards-grid .topic-card-v2:nth-child(5){animation-delay:.2s}.topic-cards-grid .topic-card-v2:nth-child(6){animation-delay:.24s}.topic-cards-grid .topic-card-v2:nth-child(7){animation-delay:.28s}.topic-cards-grid .topic-card-v2:nth-child(8){animation-delay:.32s}.topic-card-v2:hover{transform:perspective(900px) rotateX(1deg) rotateY(-1deg) translateY(-6px);box-shadow:var(--shadow-hover);border-color:#2dd52833}.topic-icon-ring{width:48px;height:48px;background:#2dd5280f;border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--primary);transition:var(--transition);flex-shrink:0}.topic-card-v2:hover .topic-icon-ring{background:var(--primary);color:#fff}.topic-info h3{margin:0;font-size:1.1rem;font-weight:700;color:var(--text-main)}.topic-info p{margin:4px 0 0;font-size:.82rem;color:var(--text-muted)}.topic-arrow{color:var(--text-muted);transition:var(--transition);flex-shrink:0}.topic-card-v2:hover .topic-arrow{color:var(--primary);transform:translate(4px)}.chapter-view{display:flex;max-width:1400px;margin:24px auto;padding:0 4%;gap:32px}.pdf-sidebar{flex:0 0 300px;background:#fff;border-radius:20px;padding:24px;box-shadow:var(--shadow-card);border:1px solid rgba(0,0,0,.03)}.pdf-sidebar h2{margin:0 0 20px;font-size:1.4rem;font-weight:700;color:var(--text-main)}.pdf-list{display:flex;flex-direction:column;gap:10px}.pdf-link{display:flex;align-items:center;gap:12px;padding:12px 16px;background:#2dd5280d;border-radius:12px;text-decoration:none;color:var(--text-main);transition:var(--transition);border:1px solid transparent;font-weight:500}.pdf-link:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-hover)}.content-area{flex:1;background:#fff;border-radius:20px;padding:40px;box-shadow:var(--shadow-card);border:1px solid rgba(0,0,0,.03)}.content-area h1{margin:0 0 16px;font-size:2.2rem;font-weight:800;color:var(--text-main)}.content-area p{font-size:1.05rem;color:var(--text-muted);line-height:1.6}@media(max-width:768px){.chapter-view{flex-direction:column;padding:0 4%}.pdf-sidebar{flex:1;width:100%}.hub-header h1{font-size:2.2rem}}.registration-container{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#fff,#e6f9e6);padding:20px;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.registration-card{background:#fff;border-radius:12px;box-shadow:0 10px 40px #00000014;padding:40px;max-width:500px;width:100%;animation:slideIn .5s ease-out;transition:all .3s ease;border:1px solid #eaeaea}.registration-card h1{font-size:28px;color:#1a1a1a;margin-bottom:10px;text-align:center;font-weight:700}.registration-form{display:flex;flex-direction:column;gap:20px}.form-group input,.form-group select{padding:12px 15px;border:1px solid #e0e0e0;border-radius:6px;font-size:14px;transition:all .3s ease;font-family:inherit;color:#333}.form-group input:focus,.form-group select:focus{outline:none;border-color:#28e028;box-shadow:0 0 0 3px #28e0281a}.form-group input:disabled,.form-group select:disabled{background-color:#f9f9f9;cursor:not-allowed;opacity:.7}.form-group small{font-size:12px;color:#999;margin-top:6px}.form-checkbox{display:flex;align-items:center;gap:10px;margin:10px 0}.form-checkbox input{width:18px;height:18px;cursor:pointer;accent-color:#28e028}.form-checkbox label{margin:0;font-size:14px;color:#555;cursor:pointer;font-weight:400}.register-button{padding:12px 20px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;border:none;border-radius:6px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;margin-top:10px}.register-button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 5px 20px #28e0284d}.register-button:disabled{opacity:.6;cursor:not-allowed;background:#a1eea1}.login-link{text-align:center;margin-top:25px;font-size:14px;color:#666}.login-link a{color:#22c522;text-decoration:none;font-weight:600;transition:color .3s ease}.login-link a:hover{color:#1a1a1a;text-decoration:underline}@media(max-width:600px){.registration-card{padding:30px 20px}.registration-card h1{font-size:24px}.registration-container{padding:10px}}.login-container{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#fff,#e6f9e6);padding:20px;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.login-card{background:#fff;border-radius:12px;box-shadow:0 10px 40px #00000014;padding:40px;max-width:450px;width:100%;animation:slideIn .5s ease-out;transition:all .3s ease;border:1px solid #eaeaea}.login-card.access-denied{border-left:5px solid #28e028}.login-card h1{font-size:28px;color:#1a1a1a;margin-bottom:10px;text-align:center;font-weight:700}.message{padding:12px 15px;border-radius:4px;margin-bottom:20px;font-size:14px}.info-message{background-color:#f0fff0;border-left:4px solid #28e028;color:#060}.login-form{display:flex;flex-direction:column;gap:20px}.login-form .form-group{display:flex;flex-direction:column}.login-form .form-group label{font-size:14px;font-weight:600;color:#1a1a1a;margin-bottom:8px}.login-form .form-group input{padding:12px 15px;border:1px solid #e0e0e0;border-radius:6px;font-size:14px;transition:all .3s ease;font-family:inherit;color:#333}.login-form .form-group input:focus{outline:none;border-color:#28e028;box-shadow:0 0 0 3px #28e0281a}.login-form .form-group input:disabled{background-color:#f9f9f9;cursor:not-allowed;opacity:.7}.login-button{padding:12px 20px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;border:none;border-radius:6px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;margin-top:10px}.login-button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 5px 20px #28e0284d}.login-button:disabled{opacity:.6;cursor:not-allowed;background:#a1eea1}.login-footer{text-align:center;margin-top:25px;font-size:14px;color:#666}.login-footer a{color:#22c522;text-decoration:none;font-weight:600;transition:color .3s ease}.login-footer a:hover{color:#1a1a1a;text-decoration:underline}.access-denied-notice{background-color:#fff1f1;border:1px solid #ffcccc;border-radius:6px;padding:15px;margin-top:20px;text-align:center;color:#c00}.access-denied-notice p{margin:0 0 5px;font-weight:600;font-size:16px}.access-denied-notice small{color:#ff4d4d;font-size:12px}@media(max-width:600px){.login-card{padding:30px 20px}.login-card h1{font-size:24px}.login-container{padding:10px}}.forgot-password-container{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#fff,#e6f9e6);padding:20px;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.forgot-password-card{background:#fff;border-radius:12px;box-shadow:0 10px 40px #00000014;padding:40px;max-width:450px;width:100%;animation:slideIn .5s ease-out;transition:all .3s ease;border:1px solid #eaeaea}.forgot-password-card h1{font-size:28px;color:#1a1a1a;margin-bottom:10px;text-align:center;font-weight:700}.forgot-password-form{display:flex;flex-direction:column;gap:20px}.forgot-password-button{padding:12px 20px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;border:none;border-radius:6px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;margin-top:10px}.forgot-password-button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 5px 20px #28e0284d}.forgot-password-button:disabled{opacity:.6;cursor:not-allowed;background:#a1eea1}.forgot-password-footer{text-align:center;margin-top:25px;font-size:14px;color:#666}.forgot-password-footer a{color:#22c522;text-decoration:none;font-weight:600;transition:color .3s ease}.forgot-password-footer a:hover{color:#1a1a1a;text-decoration:underline}@media(max-width:600px){.forgot-password-card{padding:30px 20px}.forgot-password-card h1{font-size:24px}.forgot-password-container{padding:10px}}.reset-password-container{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#fff,#e6f9e6);padding:20px;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.reset-password-card{background:#fff;border-radius:12px;box-shadow:0 10px 40px #00000014;padding:40px;max-width:450px;width:100%;animation:slideIn .5s ease-out;transition:all .3s ease;border:1px solid #eaeaea}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.reset-password-card h1{font-size:28px;color:#1a1a1a;margin-bottom:10px;text-align:center;font-weight:700}.subtitle{font-size:14px;color:#555;text-align:center;margin-bottom:30px;line-height:1.5}.error-message{background-color:#fff1f1;border-left:4px solid #ff4d4d;color:#c00;padding:12px 15px;border-radius:4px;margin-bottom:20px;font-size:14px;animation:shake .5s ease}.success-message{background-color:#f0fff0;border-left:4px solid #28e028;color:#060;padding:12px 15px;border-radius:4px;margin-bottom:20px;font-size:14px}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}.reset-password-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column}.form-group label{font-size:14px;font-weight:600;color:#1a1a1a;margin-bottom:8px}.form-group input{padding:12px 15px;border:1px solid #e0e0e0;border-radius:6px;font-size:14px;transition:all .3s ease;font-family:inherit;color:#333}.form-group input:focus{outline:none;border-color:#28e028;box-shadow:0 0 0 3px #28e0281a}.form-group input:disabled{background-color:#f9f9f9;cursor:not-allowed;opacity:.7}.password-toggle{margin-top:8px}.password-toggle label{font-size:14px;color:#666;cursor:pointer;display:flex;align-items:center;gap:8px}.password-toggle input[type=checkbox]{width:16px;height:16px;accent-color:#28e028;cursor:pointer}.reset-password-button{padding:12px 20px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;border:none;border-radius:6px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;margin-top:10px}.reset-password-button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 5px 20px #28e0284d}.reset-password-button:disabled{opacity:.6;cursor:not-allowed;background:#a1eea1}.reset-password-footer{text-align:center;margin-top:25px;font-size:14px;color:#666}.reset-password-footer a{color:#22c522;text-decoration:none;font-weight:600;transition:color .3s ease}.reset-password-footer a:hover{color:#1a1a1a;text-decoration:underline}@media(max-width:600px){.reset-password-card{padding:30px 20px}.reset-password-card h1{font-size:24px}.reset-password-container{padding:10px}}.dashboard-wrapper{padding:90px 4% 40px;max-width:1400px;margin:0 auto;min-height:100vh;background:linear-gradient(135deg,#f0fdf4,#fff,#ecfdf5)}.dashboard-loader{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:16px;color:#555;background:linear-gradient(135deg,#f0fdf4,#fff)}.spinner{width:40px;height:40px;border:3px solid rgba(40,224,40,.15);border-top-color:#28e028;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.stat-card-glass{transition:transform .2s,box-shadow .2s}.stat-card-glass:hover{transform:scale(1.03) translateY(-4px);box-shadow:0 8px 24px #28e0281f}.simple-bar-chart{display:flex;flex-direction:column;gap:10px}.bar-row{display:flex;align-items:center;gap:8px}.bar-label{width:40px;font-size:12px;color:#666;text-align:right;flex-shrink:0}.bar-track{flex:1;height:10px;background:#0000000d;border-radius:5px;overflow:hidden}.bar-fill{height:100%;border-radius:5px;transition:width .8s ease}.bar-value{width:24px;font-size:12px;color:#333;text-align:right;flex-shrink:0}.h-bar-chart{display:flex;flex-direction:column;gap:10px}.h-bar-row{display:flex;align-items:center;gap:10px}.h-bar-label{width:110px;font-size:12px;color:#555;text-align:right;flex-shrink:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.h-bar-track{flex:1;height:10px;background:#0000000d;border-radius:5px;overflow:hidden}.h-bar-fill{height:100%;background:linear-gradient(90deg,#28e028,#22c522);border-radius:5px;transition:width .8s ease}.h-bar-value{width:36px;font-size:12px;color:#28e028;font-weight:600;text-align:right;flex-shrink:0}.donut-chart{display:flex;justify-content:center;margin-bottom:8px}.donut-svg{width:160px;height:160px}.sparkline-svg{width:100%;height:120px}.dashboard-header{margin-bottom:32px}.dash-back{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;background:#28e02814;color:#22c522;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;margin-bottom:16px;transition:all .2s}.dash-back:hover{background:#28e02826}.dashboard-header h1{display:flex;align-items:center;gap:12px;font-size:2.2rem;font-weight:800;color:#111;margin-bottom:6px}.dash-icon{color:#28e028}.dashboard-header p{color:#666;font-size:15px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:16px;margin-bottom:32px}.stat-card-glass{background:#ffffffb3;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(40,224,40,.12);border-radius:16px;padding:20px;display:flex;align-items:center;gap:14px;box-shadow:0 2px 12px #0000000a;cursor:default}.stat-icon-wrap{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.stat-text{display:flex;flex-direction:column}.stat-value{font-size:20px;font-weight:700;color:#111;line-height:1.2}.stat-label{font-size:12px;color:#888;margin-top:2px}.stat-sub{font-size:11px;color:#aaa;margin-top:2px}.charts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));gap:24px}.chart-card{background:#ffffffbf;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(40,224,40,.1);border-radius:16px;padding:20px;box-shadow:0 2px 16px #0000000a}.chart-card h3{font-size:16px;font-weight:600;color:#222;margin-bottom:16px}.pie-legend{display:flex;flex-wrap:wrap;gap:10px 16px;margin-top:8px;justify-content:center}.legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#555}.dot{width:10px;height:10px;border-radius:50%}@media(max-width:768px){.dashboard-wrapper{padding:80px 4% 24px}.charts-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}}.chart-empty-state{display:flex;align-items:center;justify-content:center;min-height:100px;color:#bbb;font-size:13px;text-align:center;padding:20px;border:1px dashed rgba(40,224,40,.2);border-radius:10px;background:#28e02805}.solver-wrapper{padding:90px 4% 40px;min-height:100vh;position:relative;background:linear-gradient(135deg,#f0fdf4,#fff 40%,#e6f9e6)}.solver-container{max-width:1000px;margin:0 auto}.solver-back{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;background:#28e02814;color:#22c522;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;margin-bottom:16px;transition:all .2s}.solver-back:hover{background:#28e02826}.solver-header{text-align:center;margin-bottom:24px}.solver-badge{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;margin-bottom:12px;animation:revealUp .5s cubic-bezier(.22,1,.36,1) both}.solver-header h1{font-size:2.4rem;font-weight:800;color:#111;margin-bottom:8px;animation:revealUp .6s cubic-bezier(.22,1,.36,1) both}.solver-header p{color:#666;font-size:1.05rem;animation:revealUp .6s .1s cubic-bezier(.22,1,.36,1) both}@keyframes revealUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}.solver-mode-tabs{display:flex;gap:8px;margin-bottom:20px;justify-content:center;flex-wrap:wrap}.mode-tab{display:flex;align-items:center;gap:6px;padding:10px 18px;border:1px solid rgba(40,224,40,.15);background:#fff;border-radius:10px;font-size:14px;color:#555;cursor:pointer;transition:all .2s}.mode-tab.active{background:linear-gradient(135deg,#28e028,#22c522);color:#fff;border-color:transparent;box-shadow:0 4px 14px #28e0284d}.mode-tab{transition:transform .15s}.mode-tab:hover{transform:scale(1.02)}.mode-tab:active{transform:scale(.97)}.solver-input-card{background:#fffc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(40,224,40,.12);border-radius:16px;padding:20px;box-shadow:0 4px 20px #0000000a}.solver-input{width:100%;padding:14px 16px;border:2px solid rgba(40,224,40,.15);border-radius:12px;font-size:16px;outline:none;transition:all .2s;background:#fff;color:#222}.solver-input:focus{border-color:#28e028;box-shadow:0 0 0 3px #28e0281a}.suggestions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.suggestion-chip{padding:6px 12px;border:1px solid rgba(40,224,40,.2);background:#28e0280d;border-radius:20px;font-size:12px;color:#22c522;cursor:pointer;transition:all .2s}.suggestion-chip:hover{background:#28e0281f}.quad-inputs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}.quad-field{display:flex;flex-direction:column;align-items:center}.quad-field label{font-size:11px;color:#888;margin-bottom:2px}.quad-field input{width:60px;padding:8px;border:2px solid rgba(40,224,40,.15);border-radius:8px;text-align:center;font-size:16px;outline:none}.quad-field input:focus{border-color:#28e028}.quad-x{font-size:16px;color:#555;font-weight:500}.solve-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;margin-top:14px;padding:14px;border:none;border-radius:12px;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;font-size:16px;font-weight:600;cursor:pointer;box-shadow:0 4px 14px #28e02859;transition:transform .15s}.solve-btn:hover{transform:scale(1.02)}.solve-btn:active{transform:scale(.97)}.result-card{background:#ffffffd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(40,224,40,.15);border-radius:16px;padding:20px;margin-top:16px;box-shadow:0 4px 20px #0000000d;animation:resultPop .4s cubic-bezier(.22,1,.36,1) both}@keyframes resultPop{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.step-item{animation:stepSlide .4s cubic-bezier(.22,1,.36,1) both}@keyframes stepSlide{0%{opacity:0;transform:translate(-10px)}to{opacity:1;transform:translate(0)}}.history-item{animation:histSlide .4s cubic-bezier(.22,1,.36,1) both}@keyframes histSlide{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}.result-card.error{border-color:#e74c3c4d}.result-header{display:flex;align-items:center;gap:8px;margin-bottom:10px}.result-header h3{font-size:16px;font-weight:600;color:#111}.result-value{font-size:24px;font-weight:700;color:#28e028;background:#28e02814;padding:10px 16px;border-radius:10px;margin-bottom:14px;font-family:Courier New,monospace}.result-error{display:flex;align-items:center;gap:10px;color:#e74c3c;font-size:14px}.steps-list h4{display:flex;align-items:center;gap:6px;font-size:13px;color:#888;margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}.step-item{display:flex;align-items:flex-start;gap:10px;padding:8px 0;border-bottom:1px solid rgba(0,0,0,.04);font-size:14px;color:#444}.step-num{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,#28e028,#22c522);color:#fff;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.history-section{margin-top:24px}.history-section h3{font-size:14px;color:#888;margin-bottom:10px;text-transform:uppercase;letter-spacing:.5px}.history-list{display:flex;flex-direction:column;gap:6px}.history-item{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;background:#ffffffb3;border:1px solid rgba(40,224,40,.08);border-radius:10px;font-size:14px}.hist-input{color:#555;font-family:Courier New,monospace}.hist-result{color:#28e028;font-weight:600}.wide-tabs{gap:6px}.wide-tabs .mode-tab{padding:8px 12px;font-size:12px}.wide-tabs .mode-tab span{display:none}@media(min-width:768px){.wide-tabs .mode-tab span{display:inline}}.submode-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}.submode-tab{padding:6px 12px;border:1px solid rgba(40,224,40,.2);background:#fff;border-radius:8px;font-size:12px;color:#555;cursor:pointer;transition:all .2s}.submode-tab.active{background:linear-gradient(135deg,#28e028,#22c522);color:#fff;border-color:transparent}.submode-tab:hover{background:#28e02814}.multi-input-row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}.multi-input-row .quad-field input{width:80px}.graph-btn{background:linear-gradient(135deg,#28e028,#22c522)!important;color:#fff!important}.hint-text{font-size:12px;color:#888;margin-top:6px;text-align:center}.solver-capabilities{margin-top:40px}.solver-capabilities h3{text-align:center;font-size:1.1rem;font-weight:700;color:#111;margin-bottom:20px;text-transform:uppercase;letter-spacing:.5px}.capability-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.capability-card{background:#fff;border:1px solid rgba(40,224,40,.1);border-radius:18px;padding:22px;display:flex;align-items:flex-start;gap:14px;box-shadow:0 2px 12px #00000008;transition:transform .35s cubic-bezier(.22,1,.36,1),box-shadow .35s;transform-style:preserve-3d;animation:revealUp .5s cubic-bezier(.22,1,.36,1) both}.capability-card:hover{transform:perspective(900px) rotateX(1deg) rotateY(-1deg) translateY(-5px);box-shadow:0 10px 24px #0000000f;border-color:#28e02840}.capability-icon{width:44px;height:44px;border-radius:12px;background:#28e02814;color:#28e028;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .2s,color .2s}.capability-card:hover .capability-icon{background:#28e028;color:#fff}.capability-info h4{margin:0 0 4px;font-size:1rem;font-weight:700;color:#111}.capability-info p{margin:0;font-size:.85rem;color:#666;line-height:1.45}.solver-input-card{transform-style:preserve-3d;transition:transform .4s cubic-bezier(.22,1,.36,1),box-shadow .4s}.solver-input-card:hover{transform:perspective(900px) rotateX(.5deg) rotateY(-.5deg) translateY(-2px);box-shadow:0 12px 30px #0000000f}@media(max-width:640px){.solver-header h1{font-size:24px}.quad-inputs{gap:6px}.multi-input-row .quad-field input{width:60px}.capability-grid{grid-template-columns:1fr}}.graphing-wrapper{padding:90px 4% 40px;max-width:1200px;margin:0 auto;min-height:100vh;background:linear-gradient(135deg,#f0fdf4,#fff,#ecfdf5)}.solver-back{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;background:#2dd52814;color:#22c522;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;margin-bottom:16px;transition:all .2s}.solver-back:hover{background:#2dd52826}.graphing-header{margin-bottom:20px}.graphing-header h1{font-size:2.2rem;font-weight:800;color:#1a1a2e;margin:12px 0 4px}.graphing-header p{color:#666;font-size:1.05rem}.graphing-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:12px;flex-wrap:wrap}.view-toggle{display:flex;gap:4px;background:#0000000a;padding:4px;border-radius:10px}.view-btn{padding:6px 20px;border:none;background:transparent;border-radius:8px;font-size:13px;color:#666;cursor:pointer;transition:all .2s;font-weight:600}.view-btn.active{background:#2dd528;color:#fff;box-shadow:0 2px 10px #2dd5284d;font-weight:700}.graph-controls{display:flex;gap:6px}.ctrl-btn{width:34px;height:34px;border:1px solid rgba(45,213,40,.2);background:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#2dd528;transition:all .2s}.ctrl-btn:hover{background:#2dd52814}.equation-panel{background:#fff;border:1px solid rgba(45,213,40,.15);border-radius:12px;padding:14px;margin-bottom:14px;display:flex;flex-direction:column;gap:8px;box-shadow:0 2px 12px #2dd5280f}.eq-row{display:flex;align-items:center;gap:10px}.eq-dot{width:12px;height:12px;border-radius:50%;flex-shrink:0}.eq-input{flex:1;padding:10px 12px;border:1.5px solid rgba(0,0,0,.1);border-radius:10px;font-size:15px;outline:none;background:#fafafa;color:#222;font-family:Courier New,monospace;transition:border-color .2s}.eq-input::placeholder{color:#bbb}.eq-input:focus{border-color:#2dd528;background:#fff}.canvas-wrap{background:#fff;border:1px solid rgba(45,213,40,.15);border-radius:12px;overflow:hidden;box-shadow:0 4px 20px #2dd52812;margin-bottom:14px}.graph-canvas{width:100%;height:auto;display:block;cursor:crosshair}.range-panel{background:#fff;border:1px solid rgba(45,213,40,.15);border-radius:12px;padding:14px;display:flex;gap:20px;flex-wrap:wrap;align-items:center;box-shadow:0 2px 12px #2dd5280f}.range-row{display:flex;align-items:center;gap:8px;flex:1}.range-row label{font-size:13px;color:#2dd528;font-weight:700;width:20px}.range-row input{width:70px;padding:8px;border:1.5px solid rgba(0,0,0,.1);border-radius:8px;font-size:14px;text-align:center;outline:none;background:#fafafa;color:#333;transition:border-color .2s}.range-row input:focus{border-color:#2dd528;background:#fff}.range-row span{font-size:12px;color:#999}@media(max-width:768px){.graphing-wrapper{padding:80px 12px 24px}.range-panel{flex-direction:column;gap:10px}}.pp-coming-soon-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f0fdf4,#fff,#ecfdf5);padding:2rem 1rem}.pp-cs-card{background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:20px;padding:2.5rem 2rem;max-width:440px;width:100%;text-align:center;box-shadow:0 4px 30px #0000000f;position:relative}.pp-cs-card:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:180px;height:1px;background:linear-gradient(90deg,transparent,rgba(45,213,40,.35),transparent)}.pp-cs-icon-ring{width:80px;height:80px;border-radius:50%;background:#2dd52814;border:2px solid rgba(45,213,40,.2);display:flex;align-items:center;justify-content:center;margin:0 auto 1.2rem;color:#2dd528;animation:pp-cs-pulse 3s ease-in-out infinite}@keyframes pp-cs-pulse{0%,to{box-shadow:0 0 #2dd52826}50%{box-shadow:0 0 0 12px #2dd52800}}.pp-cs-badge{display:inline-flex;align-items:center;gap:5px;background:#2dd5280f;color:#2dd528;border:1px solid rgba(45,213,40,.18);border-radius:20px;padding:4px 12px;font-size:.72rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;margin-bottom:1rem}.pp-cs-title{font-size:1.6rem;font-weight:800;color:#2d3436;margin-bottom:.75rem}.pp-cs-subtitle{font-size:.875rem;color:#888;line-height:1.65;margin-bottom:1.4rem}.pp-cs-features{display:grid;grid-template-columns:1fr 1fr;gap:.6rem;margin-bottom:1.5rem}.pp-cs-feat{display:flex;align-items:center;gap:7px;background:#2dd52808;border:1px solid rgba(45,213,40,.08);border-radius:8px;padding:.5rem .7rem;font-size:.78rem;color:#555}.pp-cs-feat svg{color:#2dd528;flex-shrink:0}.pp-cs-notify-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;border-radius:10px;padding:.85rem 1.5rem;font-size:.95rem;font-weight:700;cursor:pointer;transition:all .2s ease;margin-bottom:.75rem;box-shadow:0 4px 20px #2dd52840}.pp-cs-notify-btn:hover{transform:translateY(-1px);box-shadow:0 6px 28px #2dd52859}.pp-cs-back-btn{width:100%;background:transparent;border:1px solid rgba(0,0,0,.08);color:#aaa;border-radius:10px;padding:.7rem 1.5rem;font-size:.875rem;cursor:pointer;transition:all .2s ease}.pp-cs-back-btn:hover{border-color:#2dd52833;color:#2dd528}:root{--pp-primary: #2dd528;--pp-primary-dark: #22c522;--pp-bg: #f9fbf9;--pp-text: #2D3436;--pp-muted: #636E72;--pp-white: #FFFFFF;--pp-shadow: 0 4px 20px rgba(0, 0, 0, .04);--pp-shadow-hover: 0 12px 30px rgba(45, 213, 40, .1);--pp-transition: all .3s cubic-bezier(.165, .84, .44, 1)}.past-papers-wrapper{min-height:100vh;background:linear-gradient(135deg,#f0fdf4,#fff 40%,#f4fbf4);padding-top:90px;padding-bottom:60px;font-family:Inter,Poppins,sans-serif;color:var(--pp-text)}.past-papers-container{max-width:1200px;margin:0 auto;padding:0 4%}.pp-back{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;background:#28e02814;color:#22c522;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;margin-bottom:20px;transition:all .2s}.pp-back:hover{background:#28e02826}.pp-header{text-align:center;margin-bottom:36px}.pp-badge{display:inline-flex;align-items:center;gap:6px;background:#2dd5281a;color:#22c522;border-radius:100px;padding:6px 14px;font-weight:700;font-size:.75rem;text-transform:uppercase;margin-bottom:14px}.pp-header h1{font-size:2.6rem;font-weight:800;margin-bottom:10px;color:#111}.pp-header p{color:var(--pp-muted);font-size:1.05rem;max-width:560px;margin:0 auto;line-height:1.55}.pp-country-title{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}.pp-country-flag-lg{font-size:3rem;line-height:1}.pp-country-title>div{text-align:left}.pp-country-title h1{margin:4px 0 0;font-size:2rem}.pp-search-bar{position:relative;max-width:480px;margin:0 auto 32px}.pp-search-bar svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:#aaa;pointer-events:none}.pp-search-bar input{width:100%;padding:14px 42px;border:2px solid rgba(40,224,40,.15);border-radius:14px;font-size:15px;outline:none;background:#fff;color:#222;transition:all .2s}.pp-search-bar input:focus{border-color:#28e028;box-shadow:0 0 0 3px #28e0281a}.pp-search-clear{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:none;border:none;color:#aaa;cursor:pointer;padding:4px}.pp-countries-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}.pp-country-card{background:var(--pp-white);border:1px solid rgba(0,0,0,.04);border-radius:18px;padding:18px 20px;display:flex;align-items:center;gap:14px;cursor:pointer;box-shadow:var(--pp-shadow);transition:var(--pp-transition);transform-style:preserve-3d}.pp-country-card:hover{transform:perspective(900px) rotateX(1deg) rotateY(-1deg) translateY(-5px);box-shadow:var(--pp-shadow-hover);border-color:#2dd52833}.pp-country-flag{font-size:2rem;flex-shrink:0}.pp-country-info{flex:1;min-width:0}.pp-country-info h3{margin:0;font-size:1rem;font-weight:700;color:#111}.pp-country-info span{font-size:.8rem;color:var(--pp-muted)}.pp-boards-list{display:flex;flex-direction:column;gap:14px;max-width:800px;margin:0 auto}.pp-board-card{background:var(--pp-white);border:1px solid rgba(0,0,0,.04);border-radius:18px;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;box-shadow:var(--pp-shadow);transition:var(--pp-transition);transform-style:preserve-3d}.pp-board-card:hover{transform:perspective(900px) rotateX(1deg) rotateY(-1deg) translateY(-5px);box-shadow:var(--pp-shadow-hover);border-color:#2dd52833}.pp-board-main{display:flex;align-items:center;gap:14px}.pp-board-icon{width:48px;height:48px;border-radius:14px;background:#28e02814;color:var(--pp-primary-dark);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .2s}.pp-board-card:hover .pp-board-icon{background:var(--pp-primary);color:#fff}.pp-board-info h3{margin:0 0 2px;font-size:1.05rem;font-weight:700;color:#111}.pp-board-info p{margin:0;font-size:.85rem;color:var(--pp-muted)}.pp-board-meta{display:flex;align-items:center;gap:10px;color:var(--pp-muted);font-size:.85rem;font-weight:500}.pp-filters{display:flex;gap:12px;justify-content:center;align-items:center;margin-bottom:24px;flex-wrap:wrap}.pp-math-only{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--pp-primary-dark);background:#28e0281a;padding:8px 14px;border-radius:100px}.pp-filter-group{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid rgba(40,224,40,.15);border-radius:10px;padding:8px 12px;color:var(--pp-muted)}.pp-filter-group select{border:none;background:none;font-size:14px;font-weight:600;color:#111;outline:none;cursor:pointer}.pp-papers-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}.pp-paper-card{background:var(--pp-white);border:1px solid rgba(0,0,0,.04);border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--pp-shadow);transition:var(--pp-transition)}.pp-paper-card:hover{transform:translateY(-3px);box-shadow:var(--pp-shadow-hover);border-color:#2dd52833}.pp-paper-top{display:flex;justify-content:space-between;align-items:center}.pp-paper-subject{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--pp-primary-dark);background:#28e02814;padding:4px 10px;border-radius:100px}.pp-paper-year{font-size:.8rem;font-weight:700;color:var(--pp-muted)}.pp-paper-title{margin:0;font-size:.95rem;font-weight:700;color:#111}.pp-paper-footer{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:8px;border-top:1px solid rgba(0,0,0,.04)}.pp-paper-status{font-size:.75rem;font-weight:600;padding:4px 10px;border-radius:100px}.pp-paper-status.coming-soon{background:#0000000a;color:var(--pp-muted)}.pp-paper-status.available{background:#28e0281a;color:#22c522}.pp-paper-download{display:inline-flex;align-items:center;gap:4px;font-size:.8rem;font-weight:600;color:var(--pp-primary-dark);text-decoration:none;padding:6px 10px;border-radius:8px;transition:all .2s}.pp-paper-download:hover{background:#28e0281a}@media(max-width:640px){.pp-header h1{font-size:1.8rem}.pp-country-title h1{font-size:1.5rem}.pp-countries-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}.pp-board-card{flex-direction:column;align-items:flex-start;gap:12px}.pp-board-meta{width:100%;justify-content:space-between}.pp-papers-grid{grid-template-columns:1fr}}.admin-login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:#f5f7fa}.admin-login-card{background:#fff;padding:40px 32px;border-radius:16px;box-shadow:0 8px 32px #00000014;width:100%;max-width:400px;text-align:center}.admin-login-icon{color:#22c522;margin-bottom:16px}.admin-login-card h2{margin:0 0 8px;font-size:22px;color:#1a1a2e}.admin-login-card p{color:#666;margin:0 0 24px;font-size:14px}.admin-password-input{width:100%;padding:12px 14px;border:1px solid #ddd;border-radius:10px;font-size:15px;margin-bottom:12px;box-sizing:border-box}.admin-password-input:focus{outline:none;border-color:#22c522}.admin-error{color:#d32f2f;font-size:13px;margin-bottom:12px}.admin-login-btn{width:100%;padding:12px;background:#22c522;color:#fff;border:none;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:background .2s}.admin-login-btn:hover{background:#1a9e1a}.admin-back-link{margin-top:16px;background:none;border:none;color:#666;font-size:13px;cursor:pointer;display:inline-flex;align-items:center;gap:4px}.admin-back-link:hover{color:#22c522}.admin-panel-page{background:#f5f7fa;min-height:100vh;padding-top:var(--nav-height, 80px)}.admin-panel-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:var(--nav-height, 80px);z-index:100}.admin-header-left{display:flex;align-items:center;gap:16px}.admin-header-left h1{display:flex;align-items:center;gap:8px;margin:0;font-size:18px;color:#1a1a2e}.admin-back-btn{display:flex;align-items:center;gap:4px;background:none;border:none;color:#666;cursor:pointer;font-size:13px;padding:6px 10px;border-radius:6px}.admin-back-btn:hover{background:#f0f0f0}.admin-header-right{display:flex;align-items:center;gap:12px}.server-pill{display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:20px;font-size:12px;font-weight:600;text-transform:capitalize}.server-pill.up{background:#e8f5e9;color:#1b5e20}.server-pill.down{background:#ffebee;color:#c62828}.admin-logout-btn{display:flex;align-items:center;gap:6px;background:#ffebee;color:#c62828;border:none;padding:6px 12px;border-radius:8px;font-size:13px;cursor:pointer;font-weight:500}.admin-logout-btn:hover{background:#ffcdd2}.admin-tabs{display:flex;gap:8px;padding:12px 24px;background:#fff;border-bottom:1px solid #e5e7eb;overflow-x:auto}.admin-tab{display:flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid #ddd;border-radius:8px;background:#fff;color:#555;font-size:13px;cursor:pointer;white-space:nowrap;transition:all .2s}.admin-tab:hover{border-color:#22c522;color:#22c522}.admin-tab.active{background:#22c522;color:#fff;border-color:#22c522}.admin-panel-body{padding:24px;max-width:900px;margin:0 auto}.admin-result{display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:10px;margin-bottom:20px;font-size:14px}.admin-result.success{background:#e8f5e9;color:#1b5e20}.admin-result.error{background:#ffebee;color:#c62828}.result-close{margin-left:auto;background:none;border:none;cursor:pointer;opacity:.6}.result-close:hover{opacity:1}.admin-form{background:#fff;padding:24px;border-radius:12px;box-shadow:0 2px 12px #0000000a}.admin-form h3{margin:0 0 20px;font-size:17px;color:#1a1a2e}.form-hint{color:#666;font-size:13px;margin:-8px 0 16px}.admin-form label{display:block;font-size:13px;font-weight:500;color:#444;margin:14px 0 6px}.admin-form input,.admin-form textarea,.admin-form select{width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:8px;font-size:14px;box-sizing:border-box;font-family:inherit}.admin-form input:focus,.admin-form textarea:focus,.admin-form select:focus{outline:none;border-color:#22c522}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.checkbox-label{display:flex!important;align-items:center;gap:8px;cursor:pointer}.checkbox-label input{width:auto!important}.admin-submit{margin-top:20px;width:100%;padding:12px;background:#22c522;color:#fff;border:none;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px}.admin-submit:hover:not(:disabled){background:#1a9e1a}.admin-submit:disabled{opacity:.6;cursor:not-allowed}.admin-manage h3{margin:0 0 16px;font-size:16px;color:#1a1a2e}.empty-state{color:#888;font-size:14px}.announcement-list{display:flex;flex-direction:column;gap:12px}.announcement-card{background:#fff;padding:16px;border-radius:10px;border-left:4px solid #22c522;box-shadow:0 2px 8px #00000008}.announcement-card.type-warning{border-left-color:#ff9800}.announcement-card.type-error{border-left-color:#f44336}.announcement-card.type-feature{border-left-color:#2196f3}.announcement-meta{display:flex;gap:10px;align-items:center;margin-bottom:8px}.badge{padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600;text-transform:uppercase}.badge.info{background:#e8f5e9;color:#1b5e20}.badge.warning{background:#fff3e0;color:#e65100}.badge.error{background:#ffebee;color:#c62828}.badge.feature{background:#e3f2fd;color:#1565c0}.announcement-card h4{margin:0 0 6px;font-size:15px}.announcement-card p{margin:0;font-size:13px;color:#555}.announcement-actions{margin-top:10px}.announcement-delete{display:inline-flex;align-items:center;gap:4px;padding:6px 12px;background:#ffebee;color:#c62828;border:none;border-radius:6px;font-size:12px;cursor:pointer}.status-card{display:flex;align-items:center;gap:16px;background:#fff;padding:20px;border-radius:10px;box-shadow:0 2px 8px #00000008}.status-card.up{border-left:4px solid #22c522}.status-card.down{border-left:4px solid #f44336}.status-icon{color:inherit}.status-card div strong{display:block;font-size:15px;margin-bottom:4px}.status-card div p{margin:0;font-size:13px;color:#666}.refresh-btn{margin-left:auto;padding:8px 14px;background:#f0f0f0;border:none;border-radius:8px;font-size:13px;cursor:pointer}.refresh-btn:hover{background:#e0e0e0}@media(max-width:640px){.admin-panel-header{flex-direction:column;gap:10px;align-items:flex-start}.form-row{grid-template-columns:1fr}}.settings-page{min-height:100vh;background:#f5f7fa;padding-bottom:40px}.settings-header{display:flex;align-items:center;gap:16px;padding:16px 24px;background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:50}.settings-header h1{margin:0;font-size:20px;color:#1a1a2e}.settings-back{display:flex;align-items:center;gap:4px;background:none;border:none;color:#666;font-size:14px;cursor:pointer;padding:6px 10px;border-radius:8px}.settings-back:hover{background:#f0f0f0}.settings-saved{margin-left:auto;display:flex;align-items:center;gap:4px;color:#22c522;font-size:13px;font-weight:600;animation:fadeInOut 1.5s ease}@keyframes fadeInOut{0%{opacity:0;transform:translateY(4px)}20%{opacity:1;transform:translateY(0)}80%{opacity:1}to{opacity:0}}.settings-container{max-width:700px;margin:0 auto;padding:24px;display:flex;flex-direction:column;gap:20px}.settings-section{background:#fff;border-radius:14px;padding:20px 24px;box-shadow:0 2px 12px #0000000a}.settings-section h2{display:flex;align-items:center;gap:8px;margin:0 0 16px;font-size:16px;color:#1a1a2e}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid #f0f0f0}.setting-row:last-child{border-bottom:none}.setting-info strong{display:block;font-size:15px;color:#222;margin-bottom:3px}.setting-info p{margin:0;font-size:13px;color:#888}.toggle-switch{width:44px;height:24px;border-radius:12px;border:none;background:#ddd;position:relative;cursor:pointer;padding:0;flex-shrink:0;transition:background .25s ease}.toggle-switch.on{background:#22c522}.toggle-knob{position:absolute;top:2px;left:2px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #0003;transition:transform .25s ease}.toggle-switch.on .toggle-knob{transform:translate(20px)}.settings-danger-btn{display:flex;align-items:center;gap:6px;padding:8px 14px;background:#ffebee;color:#c62828;border:none;border-radius:8px;font-size:13px;cursor:pointer;font-weight:500}.settings-danger-btn:hover{background:#ffcdd2}.settings-action-btn{padding:8px 18px;background:#22c522;color:#fff;border:none;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer}.settings-action-btn:hover{background:#1a9e1a}.admin-row{background:#e8f5e9;border-radius:10px;padding:14px 16px;margin:0 -4px}.info-section p{margin:0;font-size:14px;color:#555;line-height:1.6}.notification-banner-container{position:fixed;top:0;left:0;right:0;z-index:10000;display:flex;flex-direction:column;gap:0}.notification-banner{display:flex;align-items:center;gap:12px;padding:10px 20px;font-size:14px;animation:bannerSlideDown .3s ease;position:relative}@keyframes bannerSlideDown{0%{transform:translateY(-100%);opacity:0}to{transform:translateY(0);opacity:1}}.notification-banner.server-alert{background:#fff3cd;color:#856404;border-bottom:2px solid #ffc107}.notification-banner.type-info{background:#e8f5e9;color:#1b5e20;border-bottom:2px solid #22c522}.notification-banner.type-warning{background:#fff3e0;color:#e65100;border-bottom:2px solid #ff9800}.notification-banner.type-error{background:#ffebee;color:#c62828;border-bottom:2px solid #f44336}.notification-banner.type-feature{background:#e3f2fd;color:#1565c0;border-bottom:2px solid #2196f3}.banner-content{flex:1;display:flex;flex-wrap:wrap;align-items:center;gap:8px}.banner-content strong{font-weight:600}.banner-msg{opacity:.9}.banner-link{display:inline-flex;align-items:center;gap:4px;color:inherit;text-decoration:underline;font-weight:500;opacity:.85}.banner-link:hover{opacity:1}.banner-actions{display:flex;gap:6px;align-items:center}.banner-close{background:#00000014;border:none;border-radius:4px;padding:4px;cursor:pointer;color:inherit;display:flex;align-items:center;justify-content:center;transition:background .2s}.banner-close:hover{background:#00000026}.notification-banner-container~*{margin-top:var(--banner-height, 0)}.pricing-wrapper{min-height:100vh;background:linear-gradient(135deg,#f0fdf4,#fff,#ecfdf5);padding-top:70px}.pricing-hero{text-align:center;padding:4rem 1rem 3rem}.pricing-hero-badge{display:inline-flex;align-items:center;gap:6px;background:#2dd52814;color:#2dd528;border:1px solid rgba(45,213,40,.2);border-radius:20px;padding:5px 14px;font-size:.78rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;margin-bottom:1.2rem}.pricing-hero-title{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;color:#2d3436;line-height:1.2;margin-bottom:1rem}.pricing-highlight{background:linear-gradient(90deg,#2dd528,#22c522);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.pricing-hero-sub{font-size:1.05rem;color:#636e72;max-width:460px;margin:0 auto}.pricing-cards-section{padding:1.5rem 1rem 4rem}.pricing-cards-row{display:flex;gap:1.5rem;max-width:820px;margin:0 auto;align-items:flex-start;flex-wrap:wrap;justify-content:center}.pricing-card{border-radius:20px;padding:2rem;flex:1;min-width:280px;max-width:380px;position:relative;background:#fff;border:1px solid rgba(0,0,0,.06);box-shadow:0 4px 24px #0000000d}.pricing-card-premium{border:1px solid rgba(45,213,40,.25);box-shadow:0 4px 30px #2dd52814,0 8px 30px #0000000f}.pc-popular-badge{position:absolute;top:-12px;left:50%;transform:translate(-50%);background:linear-gradient(90deg,#2dd528,#22c522);color:#fff;border-radius:20px;padding:4px 14px;font-size:.72rem;font-weight:700;display:inline-flex;align-items:center;gap:5px;white-space:nowrap}.pc-header{margin-bottom:1.5rem}.pc-plan-name{font-size:1rem;font-weight:600;color:#888;text-transform:uppercase;letter-spacing:.08em;margin-bottom:.75rem}.premium-name{display:inline-flex;align-items:center;gap:6px;color:#2dd528}.pc-price-block{display:flex;align-items:baseline;gap:4px;margin-bottom:.6rem}.pc-currency{font-size:1rem;font-weight:600;color:#888}.pc-amount{font-size:2.8rem;font-weight:800;color:#2d3436;line-height:1}.pc-period{font-size:.8rem;color:#aaa}.premium-curr,.premium-amt{color:#2dd528}.premium-period{color:#888}.pc-desc{font-size:.84rem;color:#888;margin:0}.premium-desc{color:#666}.pc-features-list{list-style:none;padding:0;margin:0 0 1.5rem;display:flex;flex-direction:column;gap:.6rem}.pc-features-list li{display:flex;align-items:center;gap:9px;font-size:.875rem;padding:.4rem 0}.pc-features-list li.included{color:#555}.pc-features-list li.excluded{color:#bbb}.check-icon{color:#2dd528;flex-shrink:0}.lock-icon{color:#ccc;flex-shrink:0}.pc-premium-features{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.pc-pf-item{display:flex;align-items:flex-start;gap:12px;padding:.65rem .75rem;background:#2dd5280a;border:1px solid rgba(45,213,40,.1);border-radius:10px}.pc-pf-icon{width:32px;height:32px;border-radius:8px;background:#2dd5281a;color:#2dd528;display:flex;align-items:center;justify-content:center;flex-shrink:0}.pc-pf-label{font-size:.875rem;font-weight:600;color:#2d3436;margin:0 0 2px}.pc-pf-desc{font-size:.78rem;color:#888;margin:0}.pc-btn{width:100%;padding:.85rem 1.5rem;border-radius:10px;font-size:.925rem;font-weight:600;cursor:pointer;border:none;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:7px}.pc-btn-free{background:#f0f0f0;color:#bbb;cursor:not-allowed}.pc-btn-premium{background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;box-shadow:0 4px 20px #2dd5284d}.pc-btn-premium:hover{background:linear-gradient(135deg,#32f032,#2dd528);transform:translateY(-1px);box-shadow:0 6px 28px #2dd52866}.pc-active-badge{display:flex;align-items:center;justify-content:center;gap:8px;background:#2dd52814;color:#2dd528;border:1px solid rgba(45,213,40,.2);border-radius:10px;padding:.75rem;font-size:.9rem;font-weight:600}.pc-support-note{text-align:center;font-size:.72rem;color:#999;margin:.75rem 0 0;line-height:1.4}.pricing-trust{background:#f9fbf9;border-top:1px solid rgba(0,0,0,.05);border-bottom:1px solid rgba(0,0,0,.05);padding:2.5rem 1rem}.pricing-trust-items{display:flex;justify-content:center;gap:2rem;flex-wrap:wrap;max-width:800px;margin:0 auto}.pt-item{display:flex;align-items:flex-start;gap:12px}.pt-icon{font-size:1.6rem;line-height:1}.pt-item strong{display:block;font-size:.9rem;color:#2d3436;margin-bottom:2px}.pt-item p{font-size:.8rem;color:#888;margin:0}.pricing-faq{padding:4rem 1rem;max-width:800px;margin:0 auto}.pricing-faq h2{text-align:center;font-size:1.6rem;font-weight:700;color:#2d3436;margin-bottom:2rem}.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.faq-item{background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:12px;padding:1.2rem 1.4rem}.faq-item h4{font-size:.9rem;font-weight:600;color:#2d3436;margin:0 0 .5rem}.faq-item p{font-size:.83rem;color:#888;margin:0;line-height:1.55}@media(max-width:600px){.faq-grid{grid-template-columns:1fr}.pricing-trust-items{flex-direction:column;align-items:flex-start;gap:1.2rem}}.checkout-wrapper{min-height:100vh;background:linear-gradient(135deg,#f0fdf4,#fff,#ecfdf5);padding:90px 1.5rem 4rem;display:flex;align-items:flex-start;justify-content:center}.checkout-layout{display:grid;grid-template-columns:1fr 1fr;gap:2rem;width:100%;max-width:860px;align-items:flex-start}.checkout-card.already-premium{background:#fff;border:1px solid rgba(45,213,40,.15);border-radius:20px;padding:2.5rem 2rem;max-width:420px;width:100%;text-align:center;box-shadow:0 4px 24px #0000000f}.already-premium h2{font-size:1.4rem;font-weight:700;color:#2d3436;margin-bottom:.5rem}.already-premium p{color:#888;margin-bottom:1.5rem}.co-crown-ring{width:68px;height:68px;border-radius:50%;background:#2dd5281a;border:2px solid rgba(45,213,40,.25);display:flex;align-items:center;justify-content:center;margin:0 auto 1.2rem;color:#2dd528}.co-card-section{display:flex;flex-direction:column;gap:1.5rem}.co-info-panel{background:#fff;border:1px solid rgba(0,0,0,.07);border-radius:18px;padding:1.75rem;box-shadow:0 4px 20px #0000000a;display:flex;flex-direction:column;gap:1.2rem}.co-info-header{display:flex;align-items:center;gap:10px;font-size:1.05rem;font-weight:700;color:#2dd528}.co-info-desc{font-size:.88rem;color:#555;line-height:1.6;margin:0}.co-features-grid{display:flex;flex-direction:column;gap:.6rem}.co-feat-item{display:flex;align-items:center;gap:9px;font-size:.85rem;color:#444}.co-feat-item svg:nth-child(2){color:#2dd528;flex-shrink:0}.co-safepay-info{display:flex;align-items:flex-start;gap:7px;font-size:.78rem;color:#888;line-height:1.5;background:#2dd5280d;border:1px solid rgba(45,213,40,.15);border-radius:9px;padding:.65rem .85rem}.co-safepay-info svg{flex-shrink:0;margin-top:1px;color:#2dd528}.co-safepay-info strong{color:#2d3436}.co-feat-item{display:flex;align-items:flex-start;gap:9px;font-size:.85rem;color:#444}.co-feat-label{display:block;font-weight:600;color:#2d3436;font-size:.85rem}.co-feat-desc{display:block;font-size:.75rem;color:#888;margin-top:1px}.co-feat-item svg:nth-child(2){color:#2dd528;flex-shrink:0;margin-top:2px}.co-freemius-badge{text-align:center;font-size:.75rem;color:#aaa;margin-bottom:.75rem}.co-freemius-badge strong{color:#555}.co-plan-period{font-size:.75rem;font-weight:400;color:#aaa}.co-card-preview{width:100%;max-width:340px;height:200px;perspective:1000px;margin:0 auto;position:relative}.co-card-front,.co-card-back{position:absolute;inset:0;border-radius:18px;backface-visibility:hidden;transition:transform .6s cubic-bezier(.4,0,.2,1);box-shadow:0 20px 60px #00000040}.co-card-front{background:linear-gradient(135deg,#1a1a2e,#16213e 40%,#0f3460);padding:1.4rem 1.6rem;display:flex;flex-direction:column;justify-content:space-between;transform:rotateY(0)}.co-card-back{background:linear-gradient(135deg,#16213e,#0f3460);transform:rotateY(180deg);display:flex;flex-direction:column;justify-content:center}.co-card-preview.flipped .co-card-front{transform:rotateY(-180deg)}.co-card-preview.flipped .co-card-back{transform:rotateY(0)}.co-card-chip{width:42px;height:32px;background:linear-gradient(135deg,#d4af37,#f0d060,#d4af37);border-radius:6px;position:relative;overflow:hidden}.co-card-chip:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent,transparent 8px,rgba(0,0,0,.1) 8px,rgba(0,0,0,.1) 9px)}.co-card-brand{position:absolute;top:1.2rem;right:1.4rem}.co-brand-svg{width:52px;height:18px}.co-brand-svg.mc{width:42px;height:28px}.co-card-number-display{font-family:Courier New,monospace;font-size:1.15rem;letter-spacing:.18em;color:#ffffffeb;text-shadow:0 1px 3px rgba(0,0,0,.4);margin-top:.5rem}.co-card-bottom{display:flex;justify-content:space-between;align-items:flex-end}.co-card-label{font-size:.6rem;text-transform:uppercase;letter-spacing:.1em;color:#ffffff80;margin-bottom:2px}.co-card-value{font-size:.82rem;font-weight:600;color:#ffffffe6;letter-spacing:.04em;text-transform:uppercase}.co-card-stripe{height:44px;background:#0009;margin-bottom:1.2rem}.co-cvv-row{display:flex;align-items:center;justify-content:flex-end;gap:.75rem;padding:0 1.4rem}.co-cvv-label{font-size:.7rem;color:#ffffff80;text-transform:uppercase;letter-spacing:.08em}.co-cvv-box{background:#fff;color:#333;border-radius:5px;padding:4px 14px;font-family:Courier New,monospace;font-size:.9rem;letter-spacing:.15em;min-width:60px;text-align:center}.co-form{background:#fff;border:1px solid rgba(0,0,0,.07);border-radius:18px;padding:1.5rem;box-shadow:0 4px 20px #0000000a;display:flex;flex-direction:column;gap:1rem}.co-form-group{display:flex;flex-direction:column;gap:5px;flex:1}.co-form-group label{font-size:.75rem;font-weight:600;color:#555;text-transform:uppercase;letter-spacing:.06em}.co-form-group input{border:1.5px solid rgba(0,0,0,.1);border-radius:9px;padding:.65rem .85rem;font-size:.92rem;color:#2d3436;outline:none;transition:border-color .2s,box-shadow .2s;background:#fafafa;width:100%;box-sizing:border-box}.co-form-group input:focus{border-color:#2dd528;box-shadow:0 0 0 3px #2dd5281f;background:#fff}.co-form-group input::placeholder{color:#bbb}.co-input-wrap{position:relative}.co-input-icon{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:#aaa;pointer-events:none}.co-input-wrap input{padding-left:2.4rem}.co-form-row{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.co-secure-note{display:flex;align-items:flex-start;gap:7px;font-size:.73rem;color:#aaa;line-height:1.5;padding-top:.25rem}.co-secure-note svg{flex-shrink:0;margin-top:1px;color:#2dd528}.co-summary-section{position:sticky;top:90px}.co-order-card{background:#fff;border:1px solid rgba(0,0,0,.07);border-radius:18px;padding:1.75rem;box-shadow:0 4px 24px #0000000a;display:flex;flex-direction:column;gap:0}.co-order-header{display:flex;align-items:center;gap:8px;font-size:.95rem;font-weight:700;color:#2dd528;margin-bottom:1.2rem}.co-plan-row{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:1rem}.co-plan-name{font-size:.95rem;font-weight:600;color:#2d3436;margin:0 0 3px}.co-plan-desc{font-size:.78rem;color:#888;margin:0}.co-plan-price{font-size:1rem;font-weight:700;color:#2dd528;white-space:nowrap}.co-divider{height:1px;background:#0000000f;margin:1rem 0}.co-features-list{display:flex;flex-direction:column;gap:.55rem;margin-bottom:.25rem}.co-feat-row{display:flex;align-items:center;gap:8px;font-size:.83rem;color:#555}.co-feat-check{width:18px;height:18px;border-radius:50%;background:#2dd5281f;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#2dd528}.co-feat-row svg:nth-child(2){color:#2dd528;flex-shrink:0}.co-total-row{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:1.2rem}.co-total-row>span{font-size:.9rem;color:#888;font-weight:500}.co-total-amount{font-size:1.4rem;font-weight:800;color:#2dd528;text-align:right}.co-total-usd{font-size:.72rem;color:#aaa;text-align:right}.co-error-box{display:flex;align-items:flex-start;gap:8px;background:#ff50500f;border:1px solid rgba(255,80,80,.2);color:#e05050;border-radius:9px;padding:.7rem .9rem;font-size:.82rem;margin-bottom:1rem;line-height:1.5}.co-error-box svg{flex-shrink:0;margin-top:1px}.co-pay-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:9px;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;border-radius:12px;padding:.95rem 1.5rem;font-size:1rem;font-weight:700;cursor:pointer;transition:all .2s ease;margin-bottom:1rem;box-shadow:0 4px 22px #2dd5284d;min-height:52px}.co-pay-btn:hover:not(:disabled){background:linear-gradient(135deg,#32f032,#2dd528);transform:translateY(-1px);box-shadow:0 6px 30px #2dd52866}.co-pay-btn:disabled{opacity:.7;cursor:not-allowed;transform:none}.co-spinner{width:20px;height:20px;border:2.5px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:co-spin .7s linear infinite;flex-shrink:0}@keyframes co-spin{to{transform:rotate(360deg)}}.co-card-logos{display:flex;align-items:center;gap:.6rem;margin-bottom:1rem;flex-wrap:wrap}.co-card-logo{background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:7px;display:flex;align-items:center;justify-content:center;padding:5px 10px;box-shadow:0 2px 6px #0000000d}.co-card-logo svg{width:48px;height:16px}.co-card-logo.mc svg{width:36px;height:24px}.co-safepay-badge{font-size:.7rem;color:#aaa;font-weight:500;margin-left:auto}.co-back-link{background:none;border:none;color:#aaa;font-size:.82rem;cursor:pointer;padding:0;transition:color .2s;display:block;width:100%;text-align:center;margin-bottom:.5rem}.co-back-link:hover{color:#2dd528}.co-dev-btn{color:#ccc;font-size:.75rem;margin-top:.25rem}@media(max-width:700px){.checkout-layout{grid-template-columns:1fr}.co-summary-section{position:static}}.ps-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f0fdf4,#fff,#ecfdf5);padding:2rem 1rem}.ps-card{background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:20px;padding:2.5rem 2rem;max-width:460px;width:100%;text-align:center;box-shadow:0 4px 30px #0000000f;position:relative}.ps-card:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:180px;height:1px;background:linear-gradient(90deg,transparent,rgba(45,213,40,.35),transparent)}.ps-icon{width:80px;height:80px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1.2rem}.ps-icon-loading{background:#2dd5280f;border:2px solid rgba(45,213,40,.18);color:#2dd52899}.ps-icon-success{background:#2dd5281a;border:2px solid rgba(45,213,40,.3);color:#2dd528}.ps-icon-pending{background:#ffc8280f;border:2px solid rgba(255,200,40,.2);color:#dcb400b3}.ps-icon-error{background:#ff50500f;border:2px solid rgba(255,80,80,.2);color:#dc3c3ccc}.ps-confetti-ring{position:relative;width:fit-content;margin:0 auto}@keyframes ps-pulse{0%,to{box-shadow:0 0 #2dd52833}50%{box-shadow:0 0 0 14px #2dd52800}}.ps-icon-success{animation:ps-pulse 2s ease-in-out infinite}.ps-success-badge{display:inline-flex;align-items:center;gap:5px;background:#2dd52814;color:#2dd528;border:1px solid rgba(45,213,40,.2);border-radius:20px;padding:4px 12px;font-size:.72rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;margin-bottom:1rem}.ps-card h2{font-size:1.6rem;font-weight:800;color:#2d3436;margin-bottom:.75rem}.ps-card p{font-size:.875rem;color:#888;line-height:1.6;margin-bottom:1.5rem}.ps-subtitle{font-size:.875rem!important}.ps-features{display:grid;grid-template-columns:1fr 1fr;gap:.6rem;margin-bottom:1.5rem}.ps-feature{display:flex;align-items:center;gap:7px;background:#2dd5280a;border:1px solid rgba(45,213,40,.1);border-radius:8px;padding:.5rem .7rem;font-size:.78rem;color:#555;text-align:left}.ps-feature svg{color:#2dd528;flex-shrink:0}.ps-primary-btn{width:100%;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;border-radius:10px;padding:.85rem 1.5rem;font-size:.95rem;font-weight:700;cursor:pointer;transition:all .2s ease;margin-bottom:.75rem;box-shadow:0 4px 20px #2dd5284d}.ps-primary-btn:hover{background:linear-gradient(135deg,#32f032,#2dd528);transform:translateY(-1px);box-shadow:0 6px 28px #2dd52866}.ps-secondary-btn{width:100%;background:transparent;border:1px solid rgba(0,0,0,.1);color:#888;border-radius:10px;padding:.7rem 1.5rem;font-size:.875rem;cursor:pointer;transition:all .2s ease}.ps-secondary-btn:hover{border-color:#2dd52840;color:#2dd528}.ps-tracker{background:#2dd5280f;color:#2dd528;padding:2px 7px;border-radius:5px;font-size:.78rem;word-break:break-all}@keyframes ps-spin{to{transform:rotate(360deg)}}.ps-spin{animation:ps-spin .9s linear infinite}.pcancel-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f0fdf4,#fff,#ecfdf5);padding:2rem 1rem}.pcancel-card{background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:20px;padding:2.5rem 2rem;max-width:420px;width:100%;text-align:center;box-shadow:0 4px 24px #0000000f}.pcancel-icon{width:78px;height:78px;border-radius:50%;background:#ff50500f;border:2px solid rgba(255,80,80,.18);color:#dc3c3cb3;display:flex;align-items:center;justify-content:center;margin:0 auto 1.2rem}.pcancel-card h2{font-size:1.5rem;font-weight:700;color:#2d3436;margin-bottom:.7rem}.pcancel-card p{font-size:.875rem;color:#888;line-height:1.6;margin-bottom:1.5rem}.pcancel-retry-btn,.pcancel-plans-btn,.pcancel-home-btn{width:100%;border-radius:10px;padding:.8rem 1.5rem;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:.7rem;border:none}.pcancel-retry-btn{background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;box-shadow:0 4px 18px #2dd52840}.pcancel-retry-btn:hover{transform:translateY(-1px);box-shadow:0 6px 26px #2dd52859}.pcancel-plans-btn{background:#2dd5280f;color:#2dd528;border:1px solid rgba(45,213,40,.18)}.pcancel-plans-btn:hover{background:#2dd5281a}.pcancel-home-btn{background:transparent;color:#aaa;border:1px solid rgba(0,0,0,.08)}.pcancel-home-btn:hover{color:#888}.legal-wrapper{min-height:100vh;background:#f7faf7;padding:110px 20px 48px}.legal-card{max-width:860px;margin:0 auto;background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:8px;padding:34px;box-shadow:0 8px 30px #0000000d}.legal-back{display:inline-block;color:#168f16;text-decoration:none;font-weight:700;margin-bottom:18px}.legal-card h1{margin:0 0 22px;color:#111827;font-size:2rem}.legal-card section{border-top:1px solid #eef2f0;padding-top:18px;margin-top:18px}.legal-card h2{margin:0 0 8px;color:#1f2937;font-size:1.05rem}.legal-card p{margin:0;color:#4b5563;line-height:1.7}@media(max-width:640px){.legal-wrapper{padding:92px 14px 36px}.legal-card{padding:24px}}.sr-list-wrapper{min-height:100vh;background:linear-gradient(135deg,#f0fdf4,#fff 60%,#ecfdf5);padding:90px 5% 60px;max-width:1000px;margin:0 auto}.sr-back{display:inline-flex;align-items:center;gap:6px;background:transparent;border:1.5px solid rgba(0,0,0,.12);color:#555;border-radius:8px;padding:7px 14px;font-size:.85rem;font-weight:600;cursor:pointer;margin-bottom:28px;transition:all .18s}.sr-back:hover{border-color:#2dd528;color:#2dd528;background:#2dd5280a}.sr-list-intro{margin-bottom:24px}.sr-badge{display:inline-flex;align-items:center;gap:6px;background:#2dd52814;border:1px solid rgba(45,213,40,.2);color:#22a81e;border-radius:20px;padding:4px 13px;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;margin-bottom:12px}.sr-list-intro h1{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;color:#1a1a2e;margin:0 0 8px}.sr-highlight{color:#2dd528}.sr-list-intro p{color:#666;font-size:.95rem;max-width:540px}.sr-err-banner{background:#fff3cd;border:1px solid #ffc107;border-radius:10px;padding:10px 14px;font-size:.83rem;color:#856404;margin-bottom:18px}.sr-list-body{display:grid;grid-template-columns:320px 1fr;gap:24px;align-items:start}@media(max-width:700px){.sr-list-body{grid-template-columns:1fr}}.sr-create-card{background:#fff;border:1px solid rgba(45,213,40,.15);border-radius:16px;padding:22px;box-shadow:0 4px 20px #2dd52812}.sr-create-card h3{display:flex;align-items:center;gap:7px;color:#1a1a2e;font-size:.92rem;font-weight:700;margin:0 0 14px}.sr-divider-hr{border:none;border-top:1px solid rgba(0,0,0,.07);margin:16px 0}.sr-create-form{display:flex;flex-direction:column;gap:9px}.sr-input{background:#f8faf8;border:1.5px solid rgba(0,0,0,.1);border-radius:9px;padding:10px 13px;color:#333;font-size:.88rem;outline:none;width:100%;box-sizing:border-box;transition:border-color .18s,background .18s}.sr-input::placeholder{color:#bbb}.sr-input:focus{border-color:#2dd528;background:#fff}.sr-input-code{text-transform:uppercase;letter-spacing:.1em;font-weight:700}.sr-create-btn{display:flex;align-items:center;justify-content:center;gap:7px;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;border-radius:9px;padding:11px;font-size:.88rem;font-weight:700;cursor:pointer;box-shadow:0 4px 14px #2dd52840;transition:all .18s}.sr-create-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 20px #2dd52859}.sr-create-btn:disabled{opacity:.6;cursor:not-allowed}.sr-join-code-btn{background:#f4f4f4;border:1.5px solid rgba(0,0,0,.1);color:#333;border-radius:9px;padding:10px;font-size:.88rem;font-weight:600;cursor:pointer;transition:all .18s;text-align:center}.sr-join-code-btn:hover{border-color:#2dd528;color:#2dd528;background:#2dd5280a}.sr-rooms-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:#aaa;margin-bottom:12px}.sr-loading,.sr-empty{text-align:center;padding:40px 20px;background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:14px;color:#bbb;display:flex;flex-direction:column;align-items:center;gap:10px;font-size:.88rem}.sr-spinner{width:24px;height:24px;border:2.5px solid rgba(45,213,40,.15);border-top-color:#2dd528;border-radius:50%;animation:sr-spin .8s linear infinite}@keyframes sr-spin{to{transform:rotate(360deg)}}.sr-rooms-grid{display:flex;flex-direction:column;gap:9px}.sr-room-card{background:#fff;border:1px solid rgba(0,0,0,.07);border-radius:12px;padding:14px 16px;display:flex;align-items:center;gap:12px;box-shadow:0 2px 8px #0000000a;transition:all .18s}.sr-room-card:hover{border-color:#2dd528;box-shadow:0 4px 18px #2dd5281a;transform:translateY(-1px)}.src-icon{width:40px;height:40px;border-radius:10px;background:#2dd5281a;color:#2dd528;display:flex;align-items:center;justify-content:center;flex-shrink:0}.src-info{flex:1;min-width:0}.src-name{font-weight:700;color:#1a1a2e;font-size:.92rem}.src-topic{font-size:.76rem;color:#888;margin-top:2px}.src-code{font-size:.72rem;color:#bbb;margin-top:3px}.src-code strong{color:#2dd528;letter-spacing:.08em}.src-actions{display:flex;align-items:center;gap:7px}.src-copy-btn{width:32px;height:32px;border-radius:8px;background:#f4f4f4;border:1px solid rgba(0,0,0,.09);color:#888;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}.src-copy-btn:hover{background:#e8fce8;border-color:#2dd5284d;color:#2dd528}.src-join-btn{background:#2dd52814;border:1px solid rgba(45,213,40,.2);color:#22a81e;border-radius:8px;padding:6px 13px;font-size:.8rem;font-weight:700;cursor:pointer;white-space:nowrap;transition:all .15s}.src-join-btn:hover{background:#2dd528;color:#fff;border-color:#2dd528}.sr-room-wrapper{display:flex;flex-direction:column;height:100vh;overflow:hidden;background:#f7f8f7}.sr-topbar{display:flex;align-items:center;gap:8px;padding:7px 14px;background:#fff;border-bottom:1px solid rgba(0,0,0,.08);flex-shrink:0;flex-wrap:wrap;box-shadow:0 1px 6px #0000000d;min-height:48px}.sr-back-sm{display:flex;align-items:center;gap:5px;background:transparent;border:1.5px solid rgba(0,0,0,.1);color:#555;border-radius:7px;padding:5px 10px;font-size:.8rem;font-weight:600;cursor:pointer;white-space:nowrap;transition:all .15s}.sr-back-sm:hover{border-color:#2dd528;color:#2dd528}.sr-room-title{flex:1;font-weight:700;color:#1a1a2e;font-size:.92rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.sr-room-topic{color:#2dd528;font-weight:500;font-size:.82rem}.sr-tbtn{display:inline-flex;align-items:center;gap:5px;background:#f4f4f4;border:1px solid rgba(0,0,0,.1);color:#555;border-radius:7px;padding:5px 9px;font-size:.75rem;font-weight:600;cursor:pointer;transition:all .14s;white-space:nowrap}.sr-tbtn:hover{background:#e8fce8;border-color:#2dd5284d;color:#22a81e}.sr-tbtn.on{background:#e8fce8;border-color:#2dd528;color:#22a81e}.sr-tbtn.off{color:#e05050}.sr-tbtn-label{font-size:.75rem}.sr-tbtn-icon{background:transparent;border:none;color:#777;cursor:pointer;display:flex;align-items:center;padding:2px;transition:color .14s}.sr-tbtn-icon:hover{color:#2dd528}.sr-timer{display:flex;align-items:center;gap:5px;background:#f4f4f4;border:1px solid rgba(0,0,0,.1);border-radius:8px;padding:4px 9px}.sr-timer-display{font-family:Courier New,monospace;font-size:.88rem;font-weight:700;color:#333;min-width:46px;text-align:center}.sr-timer-display.done{color:#e05050;animation:pulse .6s infinite alternate}@keyframes pulse{to{opacity:.35}}.sr-timer-preset{background:transparent;border:none;color:#888;font-size:.73rem;cursor:pointer;outline:none}.sr-timer-preset option{background:#fff}.sr-canvas-area{flex:1;display:flex;overflow:hidden;position:relative}.sr-toolbar{display:flex;flex-direction:column;align-items:center;gap:3px;background:#fff;border-right:1px solid rgba(0,0,0,.08);padding:10px 6px;width:50px;flex-shrink:0;overflow-y:auto;box-shadow:1px 0 5px #0000000a}.sr-tool-group,.sr-color-group,.sr-width-group{display:flex;flex-direction:column;align-items:center;gap:3px;width:100%}.sr-width-group{flex-direction:row;justify-content:center;gap:3px}.sr-width-label{font-size:.68rem;color:#999;min-width:14px;text-align:center}.sr-divider{width:70%;height:1px;background:#00000014;margin:5px auto}.sr-tool-btn{width:36px;height:36px;background:#f7f7f7;border:1.5px solid transparent;border-radius:8px;color:#666;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .14s}.sr-tool-btn:hover{background:#e8fce8;color:#2dd528;border-color:#2dd5284d}.sr-tool-btn.active{background:#e8fce8;border-color:#2dd528;color:#22a81e}.sr-tool-btn.danger:hover{background:#fff0f0;color:#e05050;border-color:#dc50504d}.sr-color-btn{width:22px;height:22px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:transform .14s,border-color .14s;box-shadow:0 1px 4px #0000002e}.sr-color-btn.selected{border-color:#333;transform:scale(1.25)}.sr-canvas{flex:1;display:block;width:100%;height:100%}.sr-participants-panel{position:absolute;top:12px;right:12px;width:200px;background:#fff;border:1px solid rgba(0,0,0,.09);border-radius:12px;box-shadow:0 6px 24px #00000017;z-index:50;overflow:hidden}.sr-pp-header{display:flex;align-items:center;justify-content:space-between;padding:9px 13px;background:#f8faf8;border-bottom:1px solid rgba(0,0,0,.07);font-size:.78rem;font-weight:700;color:#444}.sr-pp-close{background:none;border:none;color:#bbb;cursor:pointer;display:flex;align-items:center}.sr-pp-close:hover{color:#555}.sr-pp-you,.sr-pp-row{display:flex;align-items:center;gap:8px;padding:7px 13px;border-bottom:1px solid rgba(0,0,0,.04)}.sr-pp-you-tag{font-size:.65rem;color:#bbb}.sr-pp-avatar{width:28px;height:28px;border-radius:50%;background:#2dd5281a;color:#22a81e;font-size:.72rem;font-weight:800;display:flex;align-items:center;justify-content:center;border:2px solid rgba(45,213,40,.2);flex-shrink:0}.sr-pp-avatar.online{border-color:#2dd528}.sr-pp-name{flex:1;font-size:.78rem;color:#333;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sr-pp-dot{width:7px;height:7px;border-radius:50%;background:#2dd528;flex-shrink:0}.sr-pp-empty{text-align:center;font-size:.77rem;color:#bbb;padding:14px 13px}.sr-symbols-panel{position:absolute;bottom:14px;left:58px;width:330px;background:#fff;border:1px solid rgba(0,0,0,.09);border-radius:12px;box-shadow:0 6px 24px #00000017;z-index:50;overflow:hidden}.sr-sp-header{display:flex;align-items:center;justify-content:space-between;padding:9px 14px;background:#f8faf8;border-bottom:1px solid rgba(0,0,0,.07);font-size:.78rem;font-weight:700;color:#444}.sr-symbols-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:3px;padding:10px}.sr-sym-btn{height:31px;background:#f7f7f7;border:1px solid rgba(0,0,0,.07);border-radius:5px;color:#333;font-size:.88rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .12s}.sr-sym-btn:hover{background:#e8fce8;border-color:#2dd5284d;color:#22a81e}@media(max-width:640px){.sr-topbar{gap:5px;padding:5px 8px}.sr-timer,.sr-tbtn-label{display:none}.sr-toolbar{width:44px}.sr-tool-btn{width:32px;height:32px}.sr-symbols-panel{width:calc(100vw - 60px);left:50px}.sr-symbols-grid{grid-template-columns:repeat(6,1fr)}}.sr-mic-err{background:#e05050;color:#fff;border-radius:50%;width:14px;height:14px;font-size:.65rem;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0}.sr-remote-cursor{position:absolute;pointer-events:none;z-index:40;transform:translate(-2px,-2px);display:flex;flex-direction:column;align-items:flex-start;gap:2px}.sr-cursor-name{font-size:.65rem;font-weight:700;color:#fff;border-radius:4px;padding:1px 5px;white-space:nowrap;margin-left:4px;box-shadow:0 1px 4px #0003}.mcw-fab{position:fixed;bottom:28px;right:28px;z-index:9999;width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px #2dd52873;transition:transform .2s ease,box-shadow .2s ease}.mcw-fab:hover{transform:scale(1.08);box-shadow:0 6px 28px #2dd5288c}.mcw-fab.mcw-fab-open{background:linear-gradient(135deg,#e05050,#c84040);box-shadow:0 4px 20px #dc505066}.mcw-panel{position:fixed;bottom:94px;right:28px;z-index:9998;width:340px;background:#1a1a2e;border-radius:18px;box-shadow:0 16px 56px #00000080;border:1px solid rgba(255,255,255,.07);overflow:hidden;animation:mcw-slide-up .22s cubic-bezier(.34,1.56,.64,1)}@keyframes mcw-slide-up{0%{opacity:0;transform:translateY(16px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}.mcw-panel-header{display:flex;align-items:center;gap:8px;padding:10px 14px 8px;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;font-size:.85rem;font-weight:700}.mcw-panel-header span{flex:1}.mcw-header-badges{display:flex;gap:5px}.mcw-badge{font-size:.65rem;font-weight:700;padding:2px 6px;border-radius:5px;background:#fff3;color:#ffffffb3;letter-spacing:.04em}.mcw-badge.active{background:#ffffffe6;color:#1a8a17}.mcw-close{background:none;border:none;color:#ffffffd9;cursor:pointer;display:flex;align-items:center;padding:2px;border-radius:6px;transition:background .15s}.mcw-close:hover{background:#fff3}.mcw-display{background:#0d0d1a;padding:10px 14px 8px;text-align:right;border-bottom:1px solid rgba(255,255,255,.06)}.mcw-expr{font-size:.72rem;color:#ffffff59;min-height:16px;font-family:Courier New,monospace;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mcw-main-display{font-size:1.7rem;font-weight:300;color:#f0f0f0;font-family:Courier New,monospace;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;letter-spacing:-.01em;transition:color .15s}.mcw-main-display.err{color:#ff6b6b}.mcw-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:#ffffff0d;padding:1px}.mcw-btn{padding:0;height:42px;border:none;cursor:pointer;font-size:.78rem;font-weight:600;border-radius:0;transition:background .12s,color .12s,transform .1s;display:flex;align-items:center;justify-content:center;letter-spacing:.01em;-webkit-user-select:none;user-select:none}.mcw-btn:active{transform:scale(.93)}.mcw-btn-digit{background:#252540;color:#e8e8f0}.mcw-btn-digit:hover{background:#2e2e55}.mcw-btn-op{background:#1e3a2a;color:#2dd528}.mcw-btn-op:hover{background:#244830}.mcw-btn-eq{background:#2dd528;color:#0d2210;font-size:1rem}.mcw-btn-eq:hover{background:#35e030}.mcw-btn-clear{background:#3a1a1a;color:#ff6b6b}.mcw-btn-clear:hover{background:#4a2020}.mcw-btn-fn{background:#1a1a35;color:#a0a8d8}.mcw-btn-fn:hover{background:#202045;color:#c8d0ff}.mcw-btn-mem{background:#16162a;color:#7878b0;font-size:.72rem}.mcw-btn-mem:hover{background:#1e1e38;color:#9898c8}.mcw-btn-const{background:#1a2a1a;color:#5fd85a}.mcw-btn-const:hover{background:#203020}.mcw-btn.active{background:#2dd528!important;color:#0d2210!important}.mcw-btn.deg-active{background:#1e3a2a!important;color:#2dd528!important}.mcw-memory-bar{text-align:center;padding:5px 14px;font-size:.7rem;color:#2dd528b3;background:#2dd5280d;border-top:1px solid rgba(45,213,40,.1);font-family:Courier New,monospace}.gcw-fab{position:fixed;bottom:28px;left:28px;z-index:9999;width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,#2dd528,#22c522);color:#fff;border:none;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;box-shadow:0 4px 20px #2dd52873;transition:transform .2s ease,box-shadow .2s ease}.gcw-fab:hover{transform:scale(1.08);box-shadow:0 6px 28px #2dd5288c}.gcw-fab-label{font-size:.5rem;font-weight:700;letter-spacing:.03em;line-height:1}@media(max-width:640px){.mcw-panel{right:8px;width:calc(100vw - 16px);bottom:80px}.mcw-fab{right:12px;bottom:14px;width:46px;height:46px}.gcw-fab{left:12px;bottom:14px;width:46px;height:46px}.mcw-btn{height:36px;font-size:.68rem}.mcw-main-display{font-size:1.3rem}}