.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);padding:1rem}.login-card{background:#fff;border-radius:16px;padding:2.5rem;width:100%;max-width:400px;box-shadow:0 25px 50px -12px #00000040}.login-header{text-align:center;margin-bottom:2rem}.login-header h1{font-size:2rem;color:var(--primary);margin-bottom:.5rem}.login-header p{color:var(--gray-500)}.login-form{display:flex;flex-direction:column;gap:1.25rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:500;color:var(--gray-700)}.error-message{background:#fef2f2;border:1px solid #fecaca;color:var(--danger);padding:.75rem 1rem;border-radius:8px;font-size:.875rem}.login-btn{width:100%;margin-top:.5rem}@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:"0.16.27"}.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}.math-editor{width:100%}.math-editor-wrapper{border:2px solid var(--gray-300, #d1d5db);border-radius:8px;overflow:hidden;background:#fff}.math-editor-wrapper:focus-within{border-color:var(--primary, #3b82f6)}.math-keyboard-toggle{display:flex;align-items:center;justify-content:center;width:100%;padding:4px;margin-top:4px;border:none;background:transparent;cursor:pointer;color:var(--gray-500, #6b7280);font-size:12px;transition:color .15s}.math-keyboard-toggle:hover:not(:disabled){color:var(--primary, #3b82f6)}.math-keyboard-toggle:disabled{opacity:.5;cursor:not-allowed}.toggle-arrow{transition:transform .2s ease}.toggle-arrow.open{transform:rotate(180deg)}.math-editor-content{min-height:50px;padding:12px 16px;font-size:18px;line-height:1.6;outline:none}.math-editor-content:empty:before{content:attr(data-placeholder);color:#9ca3af}.math-editor-content .math-field-wrapper{display:inline-block;vertical-align:middle;margin:0 4px;background:#fef3c7;border-radius:4px;padding:2px 4px}.math-editor-content .math-field-wrapper:focus-within{background:#fde68a;box-shadow:0 0 0 2px #f59e0b}.math-editor-content .math-field-wrapper .mq-editable-field{border:none!important;box-shadow:none!important;background:transparent;min-width:20px}.math-editor-content .math-field-wrapper .mq-editable-field.mq-focused{border:none!important;box-shadow:none!important}.math-editor-content .math-field-wrapper .mq-editable-field .mq-root-block{padding:2px;border:none!important}.math-keyboard{background:#fff;border:1px solid #d1d5db;border-radius:6px;padding:6px;margin-top:4px;box-shadow:0 2px 8px #0000001a}.math-keyboard-grid{display:grid;gap:2px;margin-bottom:2px}.math-keyboard-grid.five-col{grid-template-columns:repeat(5,1fr)}.math-key{padding:4px 2px;border:1px solid #e5e7eb;border-radius:4px;background:#fff;cursor:pointer;font-size:14px;min-height:28px;text-align:center;transition:all .1s}.math-key:hover{background:#fef3c7;border-color:#f59e0b}.math-key:active{transform:scale(.95)}.math-key.num{background:#f9fafb;font-weight:500}.math-key.var{background:#faf5ff;color:#7c3aed}.math-key.nav{background:#f3f4f6;font-size:18px}.math-key.nav:hover{background:#dbeafe;border-color:#3b82f6}.math-key.danger{background:#fef2f2;color:#dc2626}.math-key.primary{background:var(--primary, #3b82f6);border-color:var(--primary, #3b82f6);color:#fff}.math-key.primary:hover{background:#2563eb}@media (max-width: 480px){.math-key{padding:6px 3px;min-height:32px;font-size:13px}}.geometry-diagrams{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.5rem;padding:0;max-width:100%}.geometry-diagram{display:flex;justify-content:center;padding:0}.geometry-diagram svg{background:#fff;border-radius:4px;max-width:100%;height:auto}.geometry-diagrams .geometry-diagram svg{border:1px solid #e5e7eb}.diagram-label{font-size:12px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;fill:#374151;font-weight:500}.camera-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000f2;z-index:1000;display:flex;align-items:center;justify-content:center}.camera-container{width:100%;height:100%;max-width:600px;max-height:800px;display:flex;flex-direction:column;background:#000}@media (min-width: 768px){.camera-container{border-radius:16px;overflow:hidden;height:auto}}.camera-header{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:#000c;color:#fff}.camera-header span{font-weight:500}.camera-header .btn-icon{background:transparent;border:none;color:#fff;font-size:1.5rem;padding:.5rem;cursor:pointer}.camera-header .btn-icon:hover{opacity:.8}.camera-viewfinder{flex:1;position:relative;display:flex;align-items:center;justify-content:center;background:#111;min-height:300px}.camera-loading{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#fff;text-align:center}.camera-error{text-align:center;color:#fff;padding:2rem}.camera-error p{margin-bottom:1rem}.camera-controls{padding:1.5rem;display:flex;justify-content:center;background:#000c}.capture-button:disabled{opacity:.5;cursor:not-allowed}.practice-page{min-height:100vh;background:var(--gray-50)}.practice-content{max-width:1400px;margin:0 auto;padding:2rem}.practice-content.voice-panel-visible{padding-bottom:5rem}.session-progress{font-weight:500;color:var(--gray-700)}.user-name{font-weight:600;color:var(--primary);margin-left:1rem}.sound-toggle{background:transparent;border:none;font-size:1.25rem;cursor:pointer;padding:.25rem .15rem;border-radius:4px;transition:background .2s}.sound-toggle:hover{background:var(--gray-100)}.toggle-label{font-size:.75rem;color:var(--gray-500);text-transform:uppercase;letter-spacing:.05em;margin-left:.75rem;margin-right:0}.lesson-header-row{display:flex;align-items:center;flex-wrap:wrap;gap:.75rem 1.5rem;padding-bottom:.75rem;border-bottom:1px solid var(--gray-200);margin-bottom:.75rem}.lesson-mode{font-size:.85rem;color:var(--gray-600)}.lesson-mode-label{font-weight:600;color:var(--gray-700)}.lesson-progress{font-size:.85rem;font-weight:600;color:var(--primary);margin-left:auto}.btn-small{padding:.35rem .75rem;font-size:.85rem}.chat-header-actions{display:flex;align-items:center;gap:.5rem}.calculator-link{font-size:1.25rem;padding:.25rem .5rem;border-radius:4px;text-decoration:none;transition:background .2s}.calculator-link:hover{background:var(--gray-100)}.loading-card,.error-card,.complete-card{background:#fff;border-radius:16px;padding:3rem;text-align:center;max-width:500px;margin:0 auto;box-shadow:0 1px 3px #0000001a}.complete-card h2{color:var(--success);margin-bottom:.5rem}.session-stats{display:flex;justify-content:center;gap:2rem;margin:1.5rem 0;font-size:1.125rem;color:var(--gray-700)}.practice-layout{display:grid;grid-template-columns:1fr;gap:1.5rem}@media (min-width: 1024px){.practice-layout{grid-template-columns:1fr 350px}}.question-panel{display:flex;flex-direction:column;gap:1rem}.concept-badge{background:var(--primary);color:#fff;padding:.5rem 1rem;border-radius:8px;font-size:.875rem;font-weight:500;display:inline-block;align-self:flex-start}.follow-up-badge{background:var(--warning);color:var(--gray-900);padding:.125rem .5rem;border-radius:4px;margin-right:.5rem;font-size:.75rem}.attempt-count{opacity:.8;font-size:.75rem}.question-card{background:#fff;border-radius:16px;padding:2rem;box-shadow:0 1px 3px #0000001a}.question-card.state-working{border:2px solid var(--primary, #3b82f6)}.question-card.state-completed{border:2px solid #22c55e}.question-card.state-skipped{border:2px solid #ef4444}.question-card.show-me-mode{border:2px solid #f59e0b;padding-top:0}.show-me-banner{background:#fef3c7;color:#92400e;font-weight:600;font-size:.85rem;text-align:center;padding:.5rem 1rem;margin:0 -2rem 1rem;border-radius:14px 14px 0 0;border-bottom:1px solid #fcd34d}.btn.btn-icon{padding:.25rem .75rem;font-size:1.5rem;font-weight:700;background:var(--gray-100);border:1px solid var(--gray-300);border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;line-height:1;min-height:2.75rem}.btn.btn-icon:hover:not(:disabled){background:var(--gray-200)}.btn.btn-icon:disabled{opacity:.3;cursor:not-allowed}.btn-danger{background:#ef4444;color:#fff;border:none;padding:.5rem 1rem;border-radius:8px;cursor:pointer;font-weight:500}.btn-danger:hover:not(:disabled){background:#dc2626}.btn-danger:disabled{opacity:.5;cursor:not-allowed}.question-card h2{font-size:1rem;color:var(--gray-500);margin-bottom:1rem;text-transform:uppercase;letter-spacing:.05em}.question-text{font-size:1.25rem;line-height:1.6;color:var(--gray-900);margin-bottom:.5rem}.answer-form{display:flex;flex-direction:column;gap:1rem}.form-actions{display:flex;align-items:center;gap:.5rem;margin-bottom:.5rem}.result-card{padding:1.5rem;border-radius:12px;text-align:center;margin-bottom:1rem}.result-status{padding:.75rem 1rem;border-radius:8px;text-align:center;font-weight:600;font-size:1.1rem;margin-bottom:.5rem}.result-status.correct{background:#ecfdf5;border:1px solid #a7f3d0;color:var(--success);display:flex;flex-direction:column;align-items:center;gap:.75rem}.result-card.correct{background:#ecfdf5;border:1px solid #a7f3d0}.result-card.incorrect{background:#fef2f2;border:1px solid #fecaca}.result-card.history-view{background:transparent;border:none;padding:.5rem 0}.result-card h3{font-size:1.25rem;margin-bottom:.5rem}.result-card.correct h3{color:var(--success)}.result-card.incorrect h3{color:var(--danger)}.student-answer{font-weight:600;margin-bottom:1rem;text-align:left}.result-card p{text-align:left}.xp-earned{color:var(--warning);font-weight:600;font-size:1.125rem;margin-top:.5rem}.result-actions{display:flex;justify-content:center;gap:1rem;margin-top:1rem}.explain-prompt{background:var(--warning-light, #fef3c7);border:1px solid var(--warning, #f59e0b);border-radius:8px;padding:.75rem 1rem;margin-top:1rem;text-align:center;color:var(--gray-800)}.active-chat{background:#fff;border-radius:16px;padding:1.5rem;box-shadow:0 1px 3px #0000001a;margin-top:1rem}.chat-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--gray-200)}.chat-header h3{font-size:1rem;color:var(--gray-700);margin:0}.chat-messages{max-height:300px;overflow-y:auto;display:flex;flex-direction:column;gap:.75rem;padding:.5rem 0;margin-bottom:1rem}.chat-message{padding:.75rem 1rem;border-radius:12px;max-width:85%}.chat-message.ai{background:var(--gray-100);align-self:flex-start}.chat-message.student{background:var(--primary);color:#fff;align-self:flex-end}.chat-message.question{background:var(--gray-50, #f9fafb);border:1px solid var(--gray-200, #e5e7eb);align-self:stretch;max-width:100%}.chat-message.question .message-sender{color:var(--gray-500, #6b7280);font-style:italic}.chat-message p{font-size:.9rem;line-height:1.5;margin:0}.chat-form{display:flex;flex-direction:column;gap:.75rem;padding-top:1rem;border-top:1px solid var(--gray-200)}.camera-btn{padding:.5rem .75rem;font-size:1.25rem;line-height:1}.camera-btn:disabled{opacity:.5;cursor:not-allowed}.image-preview{position:relative;max-width:300px;margin-bottom:1rem;border-radius:8px;overflow:hidden;border:2px solid var(--gray-200)}.image-preview img{width:100%;height:auto;display:block}.preview-close{position:absolute;top:.5rem;right:.5rem;background:#0009;color:#fff;border:none;border-radius:50%;width:24px;height:24px;cursor:pointer;font-size:.875rem;display:flex;align-items:center;justify-content:center}.preview-close:hover{background:#000c}.message-image{max-width:250px;border-radius:8px;overflow:hidden}.message-image img{width:100%;height:auto;display:block}.my-work-card{background:#fff;border-radius:16px;padding:1rem 1.5rem;box-shadow:0 1px 3px #0000001a;margin-top:1rem}.my-work-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem;padding-bottom:.5rem;border-bottom:1px solid var(--gray-200)}.my-work-header h3{font-size:.9rem;color:var(--gray-700);margin:0;text-transform:uppercase;letter-spacing:.05em}.my-work-header .btn-icon{background:transparent;border:none;font-size:1rem;color:var(--gray-400);cursor:pointer;padding:.25rem .5rem;border-radius:4px;transition:all .2s}.my-work-header .btn-icon:hover{background:var(--gray-100);color:var(--gray-600)}.my-work-image{border-radius:8px;overflow:hidden;border:1px solid var(--gray-200)}.my-work-image img{width:100%;height:auto;display:block;max-height:300px;object-fit:contain;background:var(--gray-50)}.history-panel{background:#fff;border-radius:16px;padding:1.5rem;box-shadow:0 1px 3px #0000001a;height:fit-content}.history-header{margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--gray-200)}.history-header h3{font-size:1rem;color:var(--gray-700);margin:0}.history-content{color:var(--gray-600);font-size:.9rem}.history-empty{text-align:center;color:var(--gray-400);font-style:italic}.history-summary p{margin:.5rem 0}.tutor-panel{background:#fff;border-radius:16px;padding:1.5rem;box-shadow:0 1px 3px #0000001a;display:flex;flex-direction:column;height:fit-content;max-height:600px}.tutor-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--gray-200)}.tutor-panel h3{font-size:1rem;color:var(--gray-700);margin:0}.voice-toggle{background:transparent;border:none;font-size:1.25rem;cursor:pointer;padding:.25rem .5rem;border-radius:4px;transition:background .2s}.voice-toggle:hover{background:var(--gray-100)}.message-header{display:flex;justify-content:space-between;align-items:center}.speak-btn{background:transparent;border:none;font-size:.9rem;cursor:pointer;padding:.125rem .25rem;border-radius:4px;opacity:.6;transition:opacity .2s}.speak-btn:hover{opacity:1}.tutor-messages{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:1rem;padding:.5rem 0;min-height:200px;max-height:400px}.tutor-welcome{background:var(--gray-50);border-radius:8px;padding:1rem;text-align:center;color:var(--gray-600);font-size:.9rem}.tutor-welcome p{margin:.25rem 0}.tutor-message{padding:.75rem 1rem;border-radius:12px;max-width:90%}.tutor-message.ai{background:var(--gray-100);align-self:flex-start}.tutor-message.student{background:var(--primary);color:#fff;align-self:flex-end}.message-sender{font-size:.75rem;font-weight:500;display:block;margin-bottom:.25rem;opacity:.7}.tutor-message p{font-size:.9rem;line-height:1.5}.typing{font-style:italic;opacity:.7}.tutor-form{display:flex;flex-direction:column;gap:.75rem;margin-top:1rem;padding-top:1rem;border-top:1px solid var(--gray-200)}.tutor-form .input{flex:1;font-size:.9rem;padding:.5rem .75rem}.tutor-textarea{width:100%;min-height:100px;resize:vertical;font-family:inherit;line-height:1.5;border:1px solid var(--gray-300);border-radius:8px}.tutor-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.tutor-form .btn{padding:.75rem 1.5rem;align-self:flex-end}.worked-example-card{background:#fff;border-radius:16px;padding:1.5rem;box-shadow:0 4px 12px #00000026;margin-top:1rem;border:2px solid var(--primary)}.worked-example-card h3{color:var(--primary);margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--gray-200)}.example-steps{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1rem}.example-step{padding:.75rem;background:var(--gray-50);border-radius:8px;font-size:.95rem;line-height:1.5}.example-step:first-child{background:var(--primary);color:#fff;font-weight:500}.example-answer{padding:.75rem;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:8px;margin-bottom:1rem}.btn-warning{background:var(--warning);color:var(--gray-900);font-weight:500}.btn-warning:hover{opacity:.9}.ML__keyboard,.ML__popover,.ML__menu{display:none!important}.chat-input-section{background:#f8f9ff;border-radius:12px;padding:1rem;margin-top:1rem}.chat-input-section h3{margin:0 0 .75rem;font-size:1rem;color:#5b4cdb}.question-id-indicator{position:fixed;bottom:1rem;right:1rem;background:#0006;color:#fff9;padding:.25rem .5rem;border-radius:4px;font-size:.7rem;font-family:monospace;z-index:50;pointer-events:none}.phone-waiting-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000b3;z-index:1000;display:flex;align-items:center;justify-content:center}.phone-waiting-modal{background:#fff;border-radius:12px;padding:2rem;max-width:400px;text-align:center;box-shadow:0 10px 40px #0000004d}.phone-waiting-modal h3{margin:0 0 1rem;color:var(--gray-900)}.phone-waiting-modal p{margin:.5rem 0;color:var(--gray-600)}.phone-waiting-modal .waiting-status{color:var(--primary);font-weight:500;margin:1rem 0}.phone-waiting-actions{display:flex;flex-direction:column;gap:.5rem;margin-top:1.5rem}.phone-waiting-actions .btn{width:100%}.btn-outline{background:transparent;border:1px solid var(--gray-300);color:var(--gray-600)}.btn-outline:hover{background:var(--gray-50);border-color:var(--gray-400)}.icon-slashed{position:relative;display:inline-block}.icon-slashed .slash{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#dc2626;font-weight:700;font-size:1.5em;line-height:1;pointer-events:none}.voice-chat-panel{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:calc(100% - 4rem);max-width:1336px;background:linear-gradient(135deg,#1e1b4b,#312e81);border-radius:16px 16px 0 0;padding:1rem 1.25rem;box-shadow:0 -4px 12px #0000004d;z-index:100}.voice-chat-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem;padding-bottom:.5rem;border-bottom:1px solid rgba(255,255,255,.1)}.voice-chat-header.collapsed{margin-bottom:0;padding-bottom:0;border-bottom:none}.voice-chat-title{display:flex;align-items:center;gap:.5rem}.voice-chat-header h3{font-size:.9rem;color:#a5b4fc;margin:0;letter-spacing:.05em}.voice-chat-chevron{color:#a5b4fc;font-size:.75rem;transition:transform .2s ease}.voice-status{font-size:.8rem;display:flex;align-items:center;gap:.5rem}.voice-status .status-paused{color:#ffc107}.voice-pause-btn{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:4px;padding:2px 8px;font-size:.75rem;color:#fff;cursor:pointer;transition:background .2s}.voice-pause-btn:hover{background:#fff3}.voice-pause-btn.paused{background:#ffc10733;border-color:#ffc107;color:#ffc107}.voice-mode-toggle{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:4px;padding:2px 8px;font-size:1rem;cursor:pointer;transition:background .2s}.voice-mode-toggle:hover{background:#fff3}.voice-mode-toggle.listening{color:#34d399;animation:pulse 1.5s ease-in-out infinite}.voice-send-btn{background:#22c55e;border:none;border-radius:4px;padding:4px 12px;font-size:.75rem;font-weight:600;color:#fff;cursor:pointer;transition:background .2s}.voice-send-btn:hover:not(:disabled){background:#16a34a}.voice-send-btn:disabled{opacity:.5;cursor:not-allowed}.voice-input-area{display:flex;gap:.5rem;padding:.5rem;border-top:1px solid rgba(255,255,255,.1);align-items:flex-end}.voice-transcript-input{flex:1;padding:.5rem;border:1px solid rgba(255,255,255,.2);border-radius:4px;background:#0000004d;color:#e0e7ff;font-size:.85rem;resize:none;font-family:inherit}.voice-transcript-input::placeholder{color:#fff6}.voice-transcript-input:focus{outline:none;border-color:#6366f180}.chop-delete-btn{background:none;border:none;color:#ef4444;font-size:1rem;cursor:pointer;padding:0 .25rem;opacity:.7;transition:opacity .2s}.chop-delete-btn:hover{opacity:1}.utterance-edit{flex:1;background:#0000004d;border:1px solid rgba(99,102,241,.5);border-radius:4px;color:#e0e7ff;padding:.25rem .5rem;font-size:.9rem;font-family:inherit}.utterance-edit:focus{outline:none;border-color:#6366f1cc}.voice-utterance.editable{display:flex;align-items:center;gap:.5rem}.voice-status .status-listening{color:#34d399;animation:pulse 1.5s ease-in-out infinite;display:flex;align-items:center;gap:8px}.btn-pause-mic{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:4px;padding:2px 8px;font-size:14px;cursor:pointer;transition:background .2s}.btn-pause-mic:hover{background:#fff3}.btn-send-voice{background:#22c55e;border:none;border-radius:4px;padding:4px 12px;font-size:13px;font-weight:600;color:#fff;cursor:pointer;transition:background .2s}.btn-send-voice:hover:not(:disabled){background:#16a34a}.btn-send-voice:disabled{opacity:.5;cursor:not-allowed}.btn-mode-switch{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:4px;padding:2px 6px;font-size:14px;cursor:pointer;transition:background .2s}.btn-mode-switch:hover{background:#fff3}.voice-status .status-speaking{color:#fbbf24}.voice-status .status-idle{color:#94a3b8}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.voice-messages{max-height:200px;overflow-y:auto;display:flex;flex-direction:column;gap:.5rem;padding-right:.5rem}.voice-messages::-webkit-scrollbar{width:4px}.voice-messages::-webkit-scrollbar-track{background:#ffffff0d;border-radius:2px}.voice-messages::-webkit-scrollbar-thumb{background:#fff3;border-radius:2px}.voice-utterance{padding:.5rem .75rem;border-radius:8px;font-size:.9rem;line-height:1.4}.voice-utterance.student{background:#3b82f64d;border-left:3px solid #3b82f6;color:#e0e7ff}.voice-utterance.editing{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.edit-transcript-input{flex:1;min-width:150px;padding:6px 10px;border:1px solid rgba(255,255,255,.3);border-radius:4px;background:#0000004d;color:#e0e7ff;font-size:.9rem}.edit-transcript-input:focus{outline:none;border-color:#3b82f6}.btn-send-transcript{padding:6px 12px;background:#3b82f6;border:none;border-radius:4px;color:#fff;cursor:pointer;font-size:.85rem}.btn-send-transcript:hover{background:#2563eb}.btn-discard-transcript{padding:6px 10px;background:#ef44444d;border:1px solid rgba(239,68,68,.5);border-radius:4px;color:#fca5a5;cursor:pointer;font-size:.85rem}.btn-discard-transcript:hover{background:#ef444480}.btn-delete-utterance{position:absolute;left:-24px;top:50%;transform:translateY(-50%);width:20px;height:20px;padding:0;background:#ef444499;border:none;border-radius:50%;color:#fff;cursor:pointer;font-size:12px;line-height:1;opacity:.7;transition:opacity .2s}.btn-delete-utterance:hover{opacity:1;background:#ef4444e6}.voice-utterance.student{position:relative;margin-left:24px}.utterance-text.editable{cursor:pointer;border-bottom:1px dashed rgba(255,255,255,.3)}.utterance-text.editable:hover{background:#ffffff1a}.voice-utterance.sudo{background:#8b5cf64d;border-left:3px solid #8b5cf6;color:#e0e7ff}.voice-utterance.partial{opacity:.7;font-style:italic}.utterance-sender{font-weight:600;font-size:.75rem;text-transform:uppercase;letter-spacing:.03em;margin-right:.5rem;opacity:.8}.utterance-text{color:#f1f5f9}.mic-btn.recording{background:#ef4444;color:#fff;animation:pulse-red 1s ease-in-out infinite}@keyframes pulse-red{0%,to{box-shadow:0 0 #ef444466}50%{box-shadow:0 0 0 8px #ef444400}}.deferred-text{text-decoration:line-through;opacity:.6;color:#999}.dashboard-content{max-width:1200px;margin:0 auto;padding:2rem}.user-name{font-weight:500;color:var(--gray-700)}.welcome-section{text-align:center;padding:3rem 2rem;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:16px;color:#fff;margin-bottom:2rem}.welcome-section h2{font-size:2rem;margin-bottom:.5rem}.welcome-section p{opacity:.9;margin-bottom:1.5rem}.practice-btn{background:#fff;color:var(--primary);padding:1rem 2rem;font-size:1.125rem}.practice-btn:hover{background:var(--gray-100)}.stats-section{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin-bottom:2rem}.stat-card{background:#fff;border-radius:12px;padding:1.5rem;text-align:center;box-shadow:0 1px 3px #0000001a}.stat-value{font-size:2.5rem;font-weight:700;color:var(--primary)}.stat-label{color:var(--gray-500);font-size:.875rem;margin-top:.25rem}.mastery-section h3{margin-bottom:1rem;font-size:1.25rem}.mastery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}.mastery-card{background:#fff;border-radius:12px;padding:1.25rem;box-shadow:0 1px 3px #0000001a}.mastery-card.clickable{cursor:pointer;transition:all .2s}.mastery-card.clickable:hover{box-shadow:0 4px 12px #00000026;transform:translateY(-2px);border:2px solid var(--primary)}.mastery-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.lesson-number{font-size:.75rem;color:var(--gray-500);text-transform:uppercase;letter-spacing:.05em}.due-date{font-size:.75rem;color:var(--gray-500);margin-left:auto;margin-right:.5rem}.verified-badge{background:var(--success);color:#fff;font-size:.625rem;padding:.125rem .5rem;border-radius:9999px;text-transform:uppercase;font-weight:600}.mastery-card h4{font-size:.95rem;margin-bottom:.75rem;color:var(--gray-900)}.mastery-card .progress-bar{margin-bottom:.5rem}.mastery-stats{display:flex;justify-content:space-between;font-size:.75rem;color:var(--gray-500)}.streak-badge{background:linear-gradient(135deg,#ff6b35,#f7931e);color:#fff;padding:.25rem .75rem;border-radius:9999px;font-weight:600;font-size:.875rem;display:flex;align-items:center;gap:.25rem}.badges-section{margin-bottom:2rem}.badges-section h3{margin-bottom:1rem;font-size:1.25rem}.badges-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:1rem}.badge-card{background:#fff;border-radius:12px;padding:1rem;text-align:center;box-shadow:0 1px 3px #0000001a;transition:transform .2s}.badge-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.badge-icon{font-size:2rem;margin-bottom:.5rem}.badge-title{font-weight:600;font-size:.875rem;color:var(--gray-800);margin-bottom:.25rem}.badge-xp{font-size:.75rem;color:var(--success);font-weight:500}.teacher-dashboard{min-height:100vh;background:var(--gray-50)}.teacher-content{max-width:1200px;margin:0 auto;padding:2rem}.tab-nav{display:flex;gap:.5rem;margin-bottom:2rem;border-bottom:1px solid var(--gray-200);padding-bottom:.5rem}.tab-btn{padding:.75rem 1.5rem;border:none;background:transparent;color:var(--gray-500);font-weight:500;font-size:1rem;border-radius:8px 8px 0 0;transition:all .2s}.tab-btn:hover{color:var(--gray-700);background:var(--gray-100)}.tab-btn.active{color:var(--primary);background:#fff;box-shadow:0 -2px 0 var(--primary) inset}.loading-state{text-align:center;padding:3rem;color:var(--gray-500)}.students-tab h2,.tests-tab h2{margin-bottom:1.5rem}.students-table,.tests-table{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 1px 3px #0000001a}table{width:100%;border-collapse:collapse}th{text-align:left;padding:1rem;background:var(--gray-50);font-weight:600;font-size:.875rem;color:var(--gray-700);border-bottom:1px solid var(--gray-200)}td{padding:1rem;border-bottom:1px solid var(--gray-100)}tr:last-child td{border-bottom:none}tr:hover{background:var(--gray-50)}.student-name{display:flex;align-items:center;gap:.75rem}.student-name .xp-badge{font-size:.75rem;padding:.125rem .5rem}.accuracy{font-weight:600;padding:.25rem .5rem;border-radius:4px}.accuracy.high{color:var(--success);background:#ecfdf5}.accuracy.medium{color:var(--warning);background:#fffbeb}.accuracy.low{color:var(--danger);background:#fef2f2}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.status-badge{display:inline-block;padding:.25rem .75rem;border-radius:9999px;font-size:.75rem;font-weight:600;text-transform:uppercase}.status-badge.graded{background:#ecfdf5;color:var(--success)}.status-badge.pending{background:#fffbeb;color:var(--warning)}.no-tests{text-align:center;padding:3rem;color:var(--gray-500);background:#fff;border-radius:12px}.tab-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.tab-header h2{margin:0}.action-buttons{display:flex;gap:.5rem}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:#fff;border-radius:12px;padding:2rem;width:100%;max-width:400px;box-shadow:0 25px 50px -12px #00000040}.modal h3{margin:0 0 1.5rem;font-size:1.25rem}.modal .form-group{margin-bottom:1rem}.modal .form-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--gray-700)}.modal .error-message{background:#fef2f2;color:var(--danger);padding:.75rem;border-radius:8px;margin-bottom:1rem;font-size:.875rem}.modal-actions{display:flex;justify-content:flex-end;gap:.75rem;margin-top:1.5rem}.classes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}.class-card{background:#fff;border-radius:12px;padding:1.5rem;cursor:pointer;transition:all .2s;box-shadow:0 1px 3px #0000001a}.class-card:hover{box-shadow:0 4px 12px #00000026;transform:translateY(-2px)}.class-card h3{margin:0 0 .75rem;font-size:1.125rem}.class-stats{display:flex;gap:1rem;color:var(--gray-500);font-size:.875rem}.class-detail-header{display:flex;align-items:center;gap:1rem;margin-bottom:2rem}.class-detail-header h2{flex:1;margin:0}.class-sections{display:grid;grid-template-columns:1fr 1fr;gap:2rem}@media (max-width: 768px){.class-sections{grid-template-columns:1fr}}.class-section{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 1px 3px #0000001a}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.section-header h3{margin:0}.item-list{list-style:none;padding:0;margin:0;max-height:400px;overflow-y:auto}.item-list li{display:flex;justify-content:space-between;align-items:center;padding:.75rem;border-bottom:1px solid var(--gray-100)}.item-list li:last-child{border-bottom:none}.btn-remove{padding:.25rem .5rem;font-size:.75rem;color:var(--danger);background:transparent;border:1px solid var(--danger);border-radius:4px;cursor:pointer}.btn-remove:hover{background:var(--danger);color:#fff}.btn-danger{background:var(--danger);color:#fff;border:none}.btn-danger:hover{background:#b91c1c}.empty-state{color:var(--gray-500);text-align:center;padding:1rem}.modal-wide{max-width:600px}.assign-list{max-height:400px;overflow-y:auto;border:1px solid var(--gray-200);border-radius:8px;margin:1rem 0}.assign-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;cursor:pointer;border-bottom:1px solid var(--gray-100)}.assign-item:last-child{border-bottom:none}.assign-item:hover{background:var(--gray-50)}.assign-item input[type=checkbox]{width:18px;height:18px}.lessons-page{min-height:100vh;background:#f5f5f5}.lessons-page .header{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background:#fff;border-bottom:1px solid #ddd}.lessons-page .header h1{margin:0;font-size:1.5rem}.lessons-page .header-actions{display:flex;gap:.5rem}.lessons-page .error-banner{background:#fee;border:1px solid #c33;color:#c33;padding:.75rem 1rem;margin:1rem 2rem;border-radius:4px;display:flex;justify-content:space-between;align-items:center}.lessons-page .error-banner button{background:none;border:none;color:#c33;cursor:pointer;font-weight:700}.lessons-page .lessons-layout{display:grid;grid-template-columns:300px 1fr;gap:1rem;padding:1rem 2rem;min-height:calc(100vh - 80px)}.lessons-page .lessons-list{background:#fff;border-radius:8px;padding:1rem;box-shadow:0 2px 4px #0000001a}.lessons-page .lessons-list h2{margin:0 0 1rem;font-size:1.1rem;border-bottom:1px solid #eee;padding-bottom:.5rem}.lessons-page .lessons-list ul{list-style:none;padding:0;margin:0}.lessons-page .lessons-list li{padding:.75rem;border-radius:4px;cursor:pointer;margin-bottom:.25rem;display:flex;flex-direction:column;gap:.25rem;transition:background .2s}.lessons-page .lessons-list li:hover{background:#f0f0f0}.lessons-page .lessons-list li.selected{background:#6b46c1;color:#fff}.lessons-page .lesson-number{font-weight:700;font-size:.85rem}.lessons-page .lesson-title{font-size:.95rem}.lessons-page .lesson-meta{font-size:.75rem;opacity:.7}.lessons-page .lesson-detail{background:#fff;border-radius:8px;padding:1.5rem;box-shadow:0 2px 4px #0000001a}.lessons-page .lesson-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem;gap:1rem;flex-wrap:wrap}.lessons-page .lesson-header h2{margin:0;font-size:1.3rem}.lessons-page .lesson-actions{display:flex;gap:.5rem;flex-wrap:wrap}.lessons-page .lesson-description{color:#666;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid #eee}.lessons-page .lesson-detail h3{margin:0 0 1rem;font-size:1rem;color:#666}.lessons-page .no-selection{display:flex;align-items:center;justify-content:center;height:300px;color:#999}.lessons-page .questions-list{display:flex;flex-direction:column;gap:1rem}.lessons-page .question-card{border:1px solid #ddd;border-radius:8px;padding:1rem;display:flex;gap:1rem;align-items:flex-start}.lessons-page .question-number{font-weight:700;color:#6b46c1;min-width:30px}.lessons-page .question-content{flex:1}.lessons-page .question-text{font-size:1rem;margin-bottom:.5rem}.lessons-page .question-answer{font-size:.9rem;margin-bottom:.5rem}.lessons-page .question-explanation{font-size:.85rem;color:#666;margin-bottom:.5rem}.lessons-page .question-stats{font-size:.75rem;color:#999}.lessons-page .question-actions{display:flex;flex-direction:column;gap:.25rem}.lessons-page .edit-form{flex:1}.lessons-page .form-group{margin-bottom:1rem}.lessons-page .form-group label{display:block;margin-bottom:.25rem;font-weight:500;font-size:.9rem}.lessons-page .form-group input[type=text],.lessons-page .form-group input[type=number],.lessons-page .form-group textarea,.lessons-page .form-group select{width:100%;padding:.5rem;border:1px solid #ddd;border-radius:4px;font-size:1rem}.lessons-page .form-group textarea{resize:vertical}.lessons-page .form-group input[type=range]{width:calc(100% - 50px)}.lessons-page .form-actions{display:flex;gap:.5rem;margin-top:1rem}.lessons-page .modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.lessons-page .modal{background:#fff;border-radius:8px;padding:1.5rem;width:90%;max-width:500px;max-height:90vh;overflow-y:auto}.lessons-page .modal-wide{max-width:700px}.lessons-page .modal h2{margin:0 0 1rem}.lessons-page .help-text{color:#666;font-size:.9rem;margin-bottom:1rem}.lessons-page .help-text code{background:#f0f0f0;padding:.1rem .3rem;border-radius:3px}.lessons-page .bulk-textarea{font-family:monospace;font-size:.9rem}.lessons-page .btn{padding:.5rem 1rem;border:none;border-radius:4px;cursor:pointer;font-size:.9rem;transition:opacity .2s;text-decoration:none;display:inline-block}.lessons-page .btn:hover{opacity:.9}.lessons-page .btn-primary{background:#6b46c1;color:#fff}.lessons-page .btn-secondary{background:#e0e0e0;color:#333}.lessons-page .btn-danger{background:#dc3545;color:#fff}.lessons-page .btn-small{padding:.25rem .5rem;font-size:.8rem}.camera-page{min-height:100vh;background:#000;display:flex;flex-direction:column}.camera-page-header{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:#000c;color:#fff}.back-link{color:#fff;text-decoration:none;font-size:.9rem}.back-link:hover{text-decoration:underline}.camera-title{font-weight:500;font-size:1.1rem}.question-indicator{position:absolute;bottom:120px;right:1rem;background:#0009;color:#ffffff80;padding:.25rem .5rem;border-radius:4px;font-size:.75rem;font-family:monospace;z-index:10}.camera-viewport{flex:1;display:flex;align-items:center;justify-content:center;background:#111;position:relative;overflow:hidden}.camera-video{width:100%;height:100%;object-fit:cover}.camera-message{text-align:center;color:#fff;padding:2rem}.camera-message.error{color:#ff6b6b}.camera-message p{margin-bottom:1rem}.preview-container{width:100%;height:100%;position:relative}.preview-image{width:100%;height:100%;object-fit:contain}.preview-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:#000000b3;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem}.preview-overlay.success{background:#22c55ecc}.camera-controls{padding:1.5rem;display:flex;justify-content:center;background:#000c;min-height:100px}.capture-button{width:72px;height:72px;border-radius:50%;border:4px solid white;background:transparent;padding:4px;cursor:pointer;transition:transform .1s}.capture-button:hover:not(:disabled){transform:scale(1.05)}.capture-button:active:not(:disabled){transform:scale(.95)}.capture-button-inner{width:100%;height:100%;border-radius:50%;background:#fff}.capture-button:active:not(:disabled) .capture-button-inner{background:#ccc}.preview-actions{display:flex;gap:1rem;width:100%;max-width:400px}.preview-actions .btn{flex:1}.btn-large{padding:1rem 2rem;font-size:1.1rem}.uploading-indicator{color:#fff;font-size:1.1rem}.camera-page-header .btn-icon{background:transparent;border:none;color:#fff;font-size:.9rem;padding:.5rem;cursor:pointer}.camera-page-header .btn-icon:hover{opacity:.8}.app{min-height:100vh}.loading{display:flex;align-items:center;justify-content:center;min-height:100vh;font-size:1.25rem;color:var(--gray-500)}.card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 1px 3px #0000001a}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:8px;font-weight:500;font-size:1rem;border:none;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:var(--gray-100);color:var(--gray-700)}.btn-secondary:hover{background:var(--gray-200)}.btn-success{background:var(--success);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-warning{background:var(--warning);color:#fff}.btn-warning:hover{background:#d97706}.btn:disabled{opacity:.6;cursor:not-allowed}.input{width:100%;padding:.75rem 1rem;border:1px solid var(--gray-300);border-radius:8px;font-size:1rem;transition:border-color .2s}.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.header{background:#fff;border-bottom:1px solid var(--gray-200);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.header h1{font-size:1.5rem;color:var(--primary)}.header-actions{display:flex;align-items:center;gap:.25rem}.xp-badge{display:inline-flex;align-items:center;gap:.25rem;background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#fff;padding:.25rem .75rem;border-radius:9999px;font-weight:600;font-size:.875rem}.progress-bar{height:8px;background:var(--gray-200);border-radius:9999px;overflow:hidden}.progress-bar-fill{height:100%;border-radius:9999px;transition:width .3s ease}.progress-bar-fill.low{background:var(--danger)}.progress-bar-fill.medium{background:var(--warning)}.progress-bar-fill.high{background:var(--success)}*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #4f46e5;--primary-dark: #4338ca;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-500: #6b7280;--gray-700: #374151;--gray-900: #111827}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--gray-50);color:var(--gray-900);line-height:1.5}button{cursor:pointer;font-family:inherit}input,textarea{font-family:inherit}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
