@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;position:relative;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.47"}.katex .katex-mathml{border:0;-webkit-clip-path:inset(50%);clip-path:inset(50%);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 .smash{display:inline;line-height:0}.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;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex svg{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}.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{color-scheme:light;--accent: #4d6bfe;--accent-strong: #3451d1;--bg: #f5f6fa;--panel: #ffffff;--panel-subtle: #fafafa;--text: #171923;--muted: #687085;--border: #e2e5ec;--danger: #d34242;--success: #1f9d62;--warning: #b7791f;--shadow: 0 1px 2px rgba(15, 23, 42, .06);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root[data-theme=dark]{color-scheme:dark;--bg: #0e1117;--panel: #151922;--panel-subtle: #11151d;--text: #e9edf5;--muted: #8f98aa;--border: #262c38;--shadow: 0 1px 2px rgba(0, 0, 0, .24)}*{box-sizing:border-box}html,body{scrollbar-width:none}html::-webkit-scrollbar,body::-webkit-scrollbar{display:none;height:0;width:0}body{margin:0;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.app-shell{min-height:100vh}.topbar{align-items:center;background:var(--panel);border-bottom:1px solid var(--border);display:flex;gap:14px;height:52px;padding:0 16px;position:sticky;top:0;z-index:10}.brand{align-items:center;color:var(--accent);display:inline-flex;font-weight:750;gap:8px;min-width:122px}.main-nav{align-items:center;display:flex;flex:1;gap:4px}.main-nav a{border-radius:6px;color:var(--muted);font-size:14px;padding:7px 10px}.main-nav a.active,.main-nav a:hover{background:color-mix(in srgb,var(--accent) 10%,transparent);color:var(--text)}.topbar-actions{align-items:center;display:flex;gap:8px;margin-left:auto}.auth-actions{align-items:center;display:flex;gap:4px}.auth-link-button,.auth-signup-button{align-items:center;border:0;border-radius:6px;cursor:pointer;display:inline-flex;gap:6px;height:34px;padding:0 10px}.auth-link-button{background:transparent;color:var(--text)}.auth-signup-button{background:var(--accent);color:#fff;font-weight:700}.theme-toggle{flex:0 0 auto}.main-content{min-height:calc(100vh - 52px)}.site-footer{align-items:center;background:var(--panel);border-top:1px solid var(--border);color:color-mix(in srgb,var(--muted) 78%,transparent);display:grid;gap:5px;justify-items:center;padding:10px max(16px,7vw) 12px;text-align:center}.site-footer>div,.site-footer nav{align-items:center;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.site-footer strong{color:var(--accent)}.site-footer nav a{color:var(--muted);font-size:11px;font-weight:700}.site-footer p{font-size:10px;line-height:1.35;margin:0;max-width:980px}.site-footer span{font-size:11px}.legal-page{margin:0 auto;max-width:980px;padding:40px 20px 72px}.legal-card{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);display:grid;gap:18px;padding:28px}.legal-card section{border-top:1px solid var(--border);padding-top:16px}.legal-document-text{background:transparent;border:0;font-family:inherit;font-size:14px;line-height:1.75;margin:0;padding:0}.legal-document-text>*:last-child{margin-bottom:0}.legal-document-text h1{font-size:30px;margin:18px 0 10px}.legal-document-text h2{border-top:1px solid var(--border);font-size:21px;margin:28px 0 12px;padding-top:18px}.legal-document-text h3{font-size:16px;margin:20px 0 8px}.legal-document-text p,.legal-document-text ul,.legal-document-text ol,.legal-document-text blockquote,.legal-document-text table{margin-bottom:14px}.legal-document-text ul,.legal-document-text ol{padding-left:22px}.legal-document-text li{margin-bottom:6px}.legal-document-text table{border-collapse:collapse;display:block;overflow-x:auto;width:100%}.legal-document-text th,.legal-document-text td{border:1px solid var(--border);padding:9px 10px;text-align:left;vertical-align:top}.legal-document-text th{background:var(--panel-subtle)}.legal-document-text blockquote{border-left:3px solid var(--accent);color:var(--muted);padding-left:12px}.legal-document-text code{background:var(--panel-subtle);border:1px solid var(--border);border-radius:5px;padding:1px 5px}.legal-document-text pre{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;overflow-x:auto;padding:12px}.legal-document-text pre code{background:transparent;border:0;padding:0}.legal-back{align-items:center;color:var(--accent);display:inline-flex;font-weight:850;gap:7px}.registration-success-page{align-items:center;display:grid;min-height:calc(100vh - 54px);padding:28px;place-items:center;text-align:center}.registration-success-page>div{align-items:center;display:grid;gap:10px;justify-items:center}.registration-success-page svg{color:var(--success)}.registration-success-page h1{font-size:28px;margin:0}.registration-success-page p{color:var(--muted);margin:0}.landing-page{background:var(--bg)}.landing-hero{align-items:center;background:#0f1724;color:#fff;display:flex;min-height:min(760px,calc(100vh - 96px));overflow:hidden;padding:72px 7vw 78px;position:relative}.landing-hero:after{background:#080d187a;content:"";inset:0;position:absolute}.hero-workspace-preview{color:#d8e0ef;display:grid;gap:0;grid-template-rows:46px 1fr;height:517.5px;left:auto;opacity:.9;position:absolute;right:clamp(44px,4vw,82px);top:clamp(74px,10vh,112px);transform:perspective(1100px) rotateY(-8deg) rotateX(1.5deg);transform-origin:center;width:920px}.hero-preview-topbar{align-items:center;background:#151d2cf5;border:1px solid rgba(255,255,255,.12);border-bottom:0;border-radius:8px 8px 0 0;display:flex;gap:18px;height:46px;padding:0 18px}.hero-preview-topbar span,.hero-preview-topbar b,.hero-preview-panel small{color:#aebbd3;font-size:12px;font-weight:800}.hero-preview-topbar b{color:#78a6ff}.hero-preview-grid{display:grid;grid-template-columns:minmax(240px,.4fr) minmax(360px,.6fr);height:100%;min-height:0}.hero-preview-panel{background:#0d1421eb;border:1px solid rgba(255,255,255,.12);display:grid;gap:14px;min-width:0;overflow:hidden;padding:20px}.hero-preview-panel h3{color:#fff;font-size:24px;margin-bottom:0}.hero-preview-panel p{color:#b9c5d8;margin-bottom:0}.problem-preview{border-radius:0 0 0 8px}.editor-preview{background:#0a101bf5;grid-template-rows:auto 1fr}.hero-preview-right{display:grid;grid-template-rows:1fr 190px;min-width:0}.hero-preview-right .hero-preview-panel{border-left:0}.result-preview{border-radius:0 0 8px;border-top:0;gap:10px;padding:16px 18px}.hero-score-list{border-top:1px solid rgba(255,255,255,.12);display:grid;gap:8px;grid-template-columns:1fr 28px;padding-top:12px}.hero-score-list span{color:#b9c5d8;font-size:13px}.hero-score-list b{color:#78a6ff;text-align:right}.hero-editor-tab,.hero-runbar{align-items:center;display:flex;justify-content:space-between}.hero-editor-tab span,.hero-editor-tab b{color:#aebbd3;font-size:13px}.editor-preview pre,.result-preview pre{background:transparent;border:0;color:#e7edf8;font-size:14px;line-height:1.7;margin:0;padding:0;white-space:pre}.result-preview pre{color:#b9c5d8;font-size:12px;line-height:1.45}.hero-runbar{border-top:1px solid rgba(255,255,255,.12);padding-top:12px}.hero-runbar span,.hero-runbar b,.accepted-pill{border-radius:999px;font-size:12px;font-weight:800;padding:6px 10px}.hero-runbar span{background:#ffffff14;color:#d8e0ef}.hero-runbar b{background:#4d6bfe;color:#fff}.result-preview strong{color:#fff;display:block;font-size:20px;margin-top:3px}.hero-result-tabs,.hero-result-grid{align-items:center;display:flex;justify-content:space-between}.hero-result-tabs{justify-content:flex-start;gap:12px}.hero-result-tabs b{color:#79d8a8;font-size:13px}.hero-result-tabs span{color:#aebbd3;font-size:13px}.accepted-pill{background:#1f9d622e;color:#79d8a8;width:fit-content}.hero-ai-bubble{align-self:end;background:#ffffff14;border:1px solid rgba(255,255,255,.12);border-radius:8px;color:#dbe5f4;font-size:13px;line-height:1.5;padding:12px}.landing-hero-copy{max-width:640px;position:relative;z-index:1}.eyebrow{color:#aebbd3;font-size:13px;font-weight:800;letter-spacing:0;margin-bottom:12px;text-transform:uppercase}.landing-hero h1{color:#fff;font-size:clamp(46px,7vw,86px);line-height:.95;margin-bottom:18px}.landing-hero p{color:#d8e0ef;font-size:18px;max-width:590px}.landing-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}.landing-cta{min-height:42px}.landing-flow{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin:0 auto;max-width:min(1680px,calc(100vw - 96px));padding:56px 20px 88px;width:100%}.landing-feature-card{background:color-mix(in srgb,var(--panel) 88%,#eef5ff);border:1px solid color-mix(in srgb,var(--border) 74%,#cfe1ff);border-radius:8px;box-shadow:0 14px 44px #4060a014;display:grid;gap:11px;min-height:214px;padding:28px}.landing-feature-icon{align-items:center;background:color-mix(in srgb,var(--accent) 10%,var(--panel));border:1px solid color-mix(in srgb,var(--accent) 22%,var(--border));border-radius:8px;color:var(--accent);display:inline-flex;height:42px;justify-content:center;width:42px}.landing-feature-card small{color:var(--accent);font-size:13px;font-weight:800}.landing-feature-card h2{font-size:23px;margin-bottom:0}.landing-feature-card p{margin-bottom:0}.page{margin:0 auto;max-width:1180px;padding:28px 20px}.page-header{align-items:center;display:flex;gap:18px;justify-content:space-between;margin-bottom:18px}.study-page{margin:0 auto;max-width:1360px;padding:30px 20px 54px}.study-header{align-items:center;display:flex;gap:18px;justify-content:space-between;margin-bottom:20px}.study-header p{margin-bottom:0}.study-stats{display:grid;gap:12px;grid-template-columns:repeat(3,minmax(0,1fr));margin-bottom:18px}.study-stats div,.study-panel{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow)}.study-stats div{display:grid;gap:4px;min-height:86px;padding:16px}.study-stats span,.study-panel-title span{color:var(--muted);font-size:13px;font-weight:800}.study-stats strong{font-size:28px}.study-layout{display:grid;gap:16px;grid-template-columns:minmax(0,1.45fr) minmax(300px,.82fr)}.study-panel{min-width:0;padding:18px}.study-panel-title{align-items:center;display:flex;justify-content:space-between;margin-bottom:14px}.study-panel-title h2{margin-bottom:0}.study-panel-title a{color:var(--accent);font-size:13px;font-weight:800}.knowledge-map,.study-queue{display:grid;gap:10px}.knowledge-row{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:10px;padding:12px}.knowledge-row div:first-child{align-items:center;display:flex;gap:10px;justify-content:space-between}.knowledge-row span{color:var(--muted);font-size:13px}.progress-track{background:color-mix(in srgb,var(--muted) 12%,transparent);border-radius:999px;height:8px;overflow:hidden}.progress-track span{background:var(--accent);display:block;height:100%}.study-queue-row{align-items:center;background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:7px;grid-template-columns:auto 1fr 18px;padding:12px}.study-queue-row:hover{border-color:color-mix(in srgb,var(--accent) 42%,var(--border))}.study-queue-row strong{grid-column:2 / 3}.study-queue-row small{color:var(--muted);grid-column:2 / 4}.study-queue-row svg{color:var(--muted);grid-column:3;grid-row:1 / 3}.study-path-panel{grid-column:1 / 3}.study-path{display:grid;gap:12px;grid-template-columns:repeat(3,minmax(0,1fr))}.study-path div{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:8px;min-height:138px;padding:14px}.study-path svg{color:var(--accent)}.study-path span{color:var(--muted);font-size:14px;line-height:1.5}.study-topbar,.study-section-title,.study-card-head{align-items:center;display:flex;gap:14px;justify-content:space-between}.study-topbar{margin-bottom:32px}.study-topbar p,.study-section-title h2,.study-card-head h2{margin-bottom:0}.study-view-actions{background:var(--panel);border:1px solid var(--border);border-radius:8px;display:flex;gap:4px;padding:4px}.study-view-actions button{align-items:center;background:transparent;border:0;border-radius:6px;color:var(--muted);cursor:pointer;display:inline-flex;font-weight:800;gap:4px;min-height:34px;padding:0 12px}.study-view-actions button.active{background:var(--panel-subtle);color:var(--text)}.study-featured{display:grid;gap:18px}.study-section-title span{color:var(--muted);font-size:13px;font-weight:700}.study-plan-grid{display:grid;gap:16px;grid-template-columns:repeat(4,minmax(0,1fr))}.study-plan-card{border:0;border-radius:8px;color:#fff;cursor:pointer;display:grid;min-height:238px;overflow:hidden;padding:20px;position:relative;text-align:left}.study-plan-card.green,.study-detail-hero.green,.setup-illustration.green{background:linear-gradient(135deg,#2f7b47,#14563d)}.study-plan-card.blue,.study-detail-hero.blue,.setup-illustration.blue{background:linear-gradient(135deg,#087da4,#173b7a)}.study-plan-card.violet,.study-detail-hero.violet,.setup-illustration.violet{background:linear-gradient(135deg,#9b3cc8,#4f147d)}.study-plan-card.rose,.study-detail-hero.rose,.setup-illustration.rose{background:linear-gradient(135deg,#d444a0,#6f117c)}.study-plan-card.slate,.study-detail-hero.slate,.setup-illustration.slate{background:linear-gradient(135deg,#536078,#161b28)}.study-plan-card h3{color:#fff;font-size:19px;margin:8px 0 6px}.study-plan-card p{color:#ffffffc2;font-size:13px;margin-bottom:0}.study-plan-card>div:first-child{position:relative;z-index:1}.study-plan-card>div:first-child span,.study-plan-card small{color:#ffffffd1;font-size:12px;font-weight:850}.study-plan-card small{align-self:end;position:relative;z-index:1}.study-plan-icon{aspect-ratio:1;border-radius:8px;bottom:24px;box-shadow:0 18px 38px #0000002e;height:98px;object-fit:contain;position:absolute;right:22px;width:98px}.study-plan-icon.large{bottom:auto;height:210px;justify-self:center;position:relative;right:auto;width:210px}.study-plan-icon.mini{bottom:auto;height:58px;position:relative;right:auto;width:58px}.study-plan-icon.tiny{bottom:auto;height:34px;position:relative;right:auto;width:34px}.study-plan-art{bottom:24px;height:98px;position:absolute;right:22px;width:118px}.study-plan-art span{background:#ffffff5c;border-radius:999px;box-shadow:0 10px 24px #0000003d;display:block;height:18px;position:absolute;width:18px}.study-plan-art span:nth-child(1){left:10px;top:60px}.study-plan-art span:nth-child(2){left:54px;top:24px}.study-plan-art span:nth-child(3){right:10px;top:62px}.study-plan-art:before,.study-plan-art:after{background:#ffffff59;border-radius:999px;content:"";height:9px;position:absolute;transform-origin:left center}.study-plan-art:before{left:24px;top:66px;transform:rotate(-39deg);width:58px}.study-plan-art:after{left:68px;top:39px;transform:rotate(38deg);width:52px}.custom-plan-panel{align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);display:flex;gap:16px;justify-content:space-between;margin-top:22px;padding:20px}.custom-plan-panel h2,.custom-plan-panel p{margin-bottom:0}.study-plan-kicker{align-items:center;color:var(--accent);display:inline-flex;font-size:13px;font-weight:850;gap:6px;margin-bottom:8px}.dark-action{align-items:center;background:#18181b;border:0;border-radius:999px;color:#fff;cursor:pointer;display:inline-flex;font-weight:850;gap:7px;min-height:38px;padding:0 18px}.study-detail-page{margin:0 auto;max-width:1240px;padding:28px 20px 58px}.study-back{margin-bottom:14px}.study-detail-hero{align-items:center;border-radius:8px;color:#fff;display:grid;gap:40px;grid-template-columns:minmax(240px,.85fr) minmax(0,1.15fr);min-height:290px;overflow:hidden;padding:42px 70px;position:relative}.study-detail-hero h1{color:#fff;font-size:34px;margin-bottom:10px}.study-detail-hero p{color:#ffffffc7;max-width:560px}.study-detail-hero .study-plan-kicker{color:#ffffffd6}.study-plan-art.large{bottom:auto;height:180px;position:relative;right:auto;width:230px}.study-plan-art.large span{height:38px;width:38px}.study-plan-art.large span:nth-child(1){left:34px;top:120px}.study-plan-art.large span:nth-child(2){left:105px;top:42px}.study-plan-art.large span:nth-child(3){right:36px;top:122px}.study-plan-art.large:before{left:68px;top:136px;width:104px}.study-plan-art.large:after{left:136px;top:70px;width:96px}.study-detail-grid{display:grid;gap:28px;grid-template-columns:minmax(0,1fr) 330px;margin-top:28px}.study-task-table{background:var(--panel);border:1px solid var(--border);border-radius:8px;overflow:hidden}.study-task-table header,.study-task-row{align-items:center;border-bottom:1px solid var(--border);display:grid;gap:12px;grid-template-columns:24px minmax(0,1fr) 80px;min-height:54px;padding:0 18px}.study-task-table header{background:var(--panel-subtle);grid-template-columns:1fr auto}.study-task-table header span{color:var(--muted);font-size:13px}.study-task-row span{border:2px solid color-mix(in srgb,var(--muted) 45%,transparent);border-radius:999px;height:16px;width:16px}.study-task-row:hover{background:color-mix(in srgb,var(--accent) 6%,transparent)}.study-detail-aside{display:grid;gap:20px}.study-detail-aside section,.study-calendar-card,.study-analytics-card,.study-problem-stats,.my-study-main section{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);padding:18px}.study-detail-aside li{color:var(--muted);line-height:1.7}.study-badge-row{align-items:center;display:grid;gap:12px;grid-template-columns:58px 1fr}.study-plan-art.mini{border-radius:8px;bottom:auto;height:58px;position:relative;right:auto;width:58px}.study-plan-art.mini.green{background:#14563d}.study-plan-art.mini.blue{background:#173b7a}.study-plan-art.mini.violet{background:#4f147d}.study-plan-art.mini.rose{background:#6f117c}.study-plan-art.mini.slate{background:#161b28}.study-plan-art.mini span{height:10px;width:10px}.study-plan-art.mini span:nth-child(1){left:12px;top:36px}.study-plan-art.mini span:nth-child(2){left:25px;top:14px}.study-plan-art.mini span:nth-child(3){right:10px;top:36px}.study-plan-art.mini:before{left:20px;top:40px;width:22px}.study-plan-art.mini:after{left:34px;top:23px;width:20px}.related-plans{display:grid;gap:10px}.related-plans button{align-items:center;background:transparent;border:0;color:var(--text);cursor:pointer;display:grid;gap:10px;grid-template-columns:30px minmax(0,1fr) 16px;min-height:42px;padding:0;text-align:left}.plan-dot{border-radius:8px;display:block;height:30px;width:30px}.plan-dot.green{background:#2f7b47}.plan-dot.blue{background:#087da4}.plan-dot.violet{background:#8730b1}.plan-dot.rose{background:#b82e95}.my-study-layout{display:grid;gap:22px;grid-template-columns:minmax(0,1fr) 380px}.my-study-main{display:grid;gap:22px}.my-study-main h2{margin-bottom:14px}.empty-plan-box,.empty-ended-plan{align-items:center;color:var(--muted);display:grid;gap:12px;justify-items:center;min-height:180px;text-align:center}.active-plan-list{display:grid;gap:12px}.active-study-card{align-items:center;background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:14px;grid-template-columns:58px minmax(0,1fr) auto;padding:10px}.active-study-card.selected{border-color:color-mix(in srgb,var(--accent) 42%,var(--border))}.active-study-card small{color:var(--muted)}.plan-select-button{background:transparent;border:0;color:var(--text);cursor:pointer;font-size:15px;font-weight:850;padding:0;text-align:left}.ended-plan-list{display:grid;gap:10px}.ended-plan-list article{align-items:center;background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:10px;grid-template-columns:34px minmax(0,1fr) auto;padding:10px}.ended-plan-list span{color:var(--muted);font-size:12px}.schedule-list{display:grid;gap:10px}.schedule-list article{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:12px;grid-template-columns:78px minmax(0,1fr);padding:12px}.schedule-list article.today{border-color:color-mix(in srgb,var(--accent) 38%,var(--border))}.schedule-list time{color:var(--accent);font-weight:850}.schedule-list article div{display:flex;flex-wrap:wrap;gap:8px}.schedule-list a,.schedule-list article div span{background:var(--panel);border:1px solid var(--border);border-radius:999px;color:var(--text);font-size:13px;padding:4px 8px}.study-overview{display:grid;gap:18px}.calendar-grid{display:grid;gap:6px;grid-template-columns:repeat(7,1fr)}.calendar-grid span,.calendar-grid button{align-items:center;background:transparent;border:0;border-radius:999px;color:var(--muted);display:flex;font-size:13px;height:34px;justify-content:center}.calendar-grid button{cursor:pointer}.calendar-grid button:disabled{cursor:default;opacity:1}.calendar-weekdays span{font-weight:800;height:26px}.calendar-grid button.today{background:var(--accent);color:#fff;font-weight:900}.calendar-grid button.scheduled:not(.today){background:color-mix(in srgb,#111827 12%,var(--panel-subtle));color:var(--text)}.calendar-grid button.selected{background:#111827;color:#fff;font-weight:900}[data-theme=dark] .calendar-grid button.selected{background:color-mix(in srgb,var(--accent) 70%,black)}.calendar-empty{visibility:hidden}.calendar-goal-row{align-items:center;border-top:1px solid var(--border);display:flex;gap:10px;margin:14px -18px 0;min-height:56px;padding:0 18px}.calendar-goal-row span{border:3px solid var(--border);border-radius:999px;height:22px;width:22px}.selected-day-plan{border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:8px;margin:0 -18px -18px;padding:14px 18px}.selected-day-plan strong{flex:0 0 100%}.selected-day-plan a,.selected-day-plan span{background:var(--panel-subtle);border:1px solid var(--border);border-radius:999px;color:var(--text);font-size:12px;padding:5px 9px;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.overview-main-stat{display:grid;gap:4px;margin-top:16px}.overview-main-stat span,.overview-main-stat small{color:var(--muted)}.overview-main-stat strong{color:var(--accent);font-size:32px}.overview-difficulty-row{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.study-chart{align-items:end;border-bottom:1px solid var(--border);display:grid;gap:10px;grid-template-columns:repeat(7,1fr);min-height:100px;padding:12px 8px 0}.study-chart i{background:color-mix(in srgb,var(--accent) 70%,var(--panel));border-radius:999px 999px 0 0;display:block;min-height:8px}.study-problem-table-head,.study-problem-stat-row{align-items:center;border-bottom:1px solid var(--border);display:grid;gap:10px;grid-template-columns:minmax(72px,.75fr) minmax(0,1fr) 32px;min-height:40px}.study-problem-table-head{color:var(--muted);font-size:12px;font-weight:800}.study-problem-stat-row{color:var(--text);font-size:13px}.study-problem-stat-row span,.study-problem-stat-row b{align-items:center;color:var(--muted);display:inline-flex;font-size:12px;font-weight:700;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.study-problem-stat-row strong{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.study-problem-stat-row b{color:var(--success);justify-content:center}.study-setup-modal{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 24px 80px #00000047;display:grid;gap:18px;max-width:560px;padding:18px;width:100%}.study-setup-modal header,.study-setup-modal header div,.daily-target-control,.study-setup-modal footer{align-items:center;display:flex;gap:10px;justify-content:space-between}.study-setup-modal header div{justify-content:flex-start}.setup-illustration{align-items:center;border-radius:8px;color:#ffffffdb;display:flex;height:160px;justify-content:center}.daily-target-control{justify-content:center}.daily-target-control input{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);height:40px;padding:0 10px;width:74px}.weekday-picker{display:grid;gap:10px;grid-template-columns:repeat(7,minmax(0,1fr))}.weekday-picker button{background:var(--panel);border:1px solid var(--border);border-radius:8px;color:var(--muted);cursor:pointer;display:grid;font-weight:800;gap:4px;min-height:72px;place-items:center}.weekday-picker button.active{border-color:#18181b;color:var(--text)}.weekday-picker b{color:var(--text);font-size:18px}.knowledge-picker{display:grid;gap:10px}.knowledge-picker>div:first-child{align-items:center;display:flex;justify-content:space-between}.knowledge-picker>div:first-child button{background:transparent;border:0;color:var(--accent);cursor:pointer;font-weight:800}.knowledge-picker>div:last-child{display:flex;flex-wrap:wrap;gap:8px}.knowledge-picker>div:last-child button{background:var(--panel-subtle);border:1px solid var(--border);border-radius:999px;color:var(--muted);cursor:pointer;font-weight:750;min-height:30px;padding:0 10px;text-transform:capitalize}.knowledge-picker>div:last-child button.active{background:color-mix(in srgb,var(--accent) 12%,var(--panel));border-color:color-mix(in srgb,var(--accent) 42%,var(--border));color:var(--accent)}h1,h2,h3,p{margin-top:0}h1{font-size:28px;letter-spacing:0;margin-bottom:8px}h2{font-size:17px;margin-bottom:8px}h3{font-size:14px;margin-bottom:8px}p{color:var(--muted);line-height:1.58}.search-input,.auth-form input{background:var(--panel);border:1px solid var(--border);border-radius:6px;color:var(--text);height:34px;padding:0 10px}.search-input{min-width:min(340px,45vw)}.search-popover{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 18px 45px #0f172a29;max-width:min(560px,calc(100vw - 24px));padding:10px;position:fixed;right:16px;top:62px;width:520px;z-index:30}.search-popover form{align-items:center;display:grid;gap:8px;grid-template-columns:20px 1fr auto 34px}.search-popover svg{color:var(--muted)}.search-popover input{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);height:36px;padding:0 10px}.small-icon{height:34px;min-height:34px;min-width:34px;width:34px}.problemset-page{display:grid;gap:28px;grid-template-columns:240px minmax(0,1060px);margin:0 auto;max-width:1360px;padding:24px 20px 44px}.problemset-sidebar{align-self:start;display:grid;gap:18px;position:sticky;top:76px}.problemset-menu{border-bottom:1px solid var(--border);display:grid;gap:4px;padding-bottom:14px}.problemset-menu a{align-items:center;border-radius:6px;color:var(--muted);display:flex;font-weight:700;gap:10px;min-height:38px;padding:0 10px}.problemset-menu a.active,.problemset-menu a:hover{background:var(--panel);color:var(--text)}.problemset-progress{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:14px}.problemset-progress span,.sidebar-tags>span{color:var(--muted);display:block;font-size:12px;font-weight:800;margin-bottom:8px;text-transform:uppercase}.problemset-progress strong{display:block;font-size:28px;margin-bottom:2px}.problemset-progress p{margin-bottom:0}.sidebar-tags{display:grid;gap:6px}.sidebar-tags button{align-items:center;background:transparent;border:0;border-radius:6px;color:var(--muted);cursor:pointer;display:flex;justify-content:space-between;min-height:32px;padding:0 9px;text-align:left}.sidebar-tags button b{color:var(--muted);font-size:12px}.sidebar-tags button.active,.sidebar-tags button:hover{background:var(--panel);color:var(--text)}.problemset-main{min-width:0}.problemset-header{align-items:flex-end;display:flex;gap:20px;justify-content:space-between;margin-bottom:18px}.problemset-header h1{margin-bottom:6px}.problemset-header p{margin-bottom:0}.problemset-stats{align-items:center;display:flex;gap:10px;white-space:nowrap}.problemset-stats span{align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:999px;color:var(--muted);display:inline-flex;font-size:13px;gap:5px;min-height:30px;padding:0 10px}.topic-strip{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.topic-strip button,.segmented-filter button,.active-search{align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:999px;color:var(--muted);cursor:pointer;display:inline-flex;gap:7px;min-height:34px;padding:0 12px;text-transform:capitalize}.topic-strip button b{color:var(--muted);font-size:12px}.topic-strip button.active,.segmented-filter button.active,.active-search{background:color-mix(in srgb,var(--accent) 10%,var(--panel));border-color:color-mix(in srgb,var(--accent) 38%,var(--border));color:var(--accent)}.filter-bar{align-items:stretch;border-bottom:1px solid var(--border);display:grid;gap:10px;grid-template-columns:1fr;grid-auto-flow:row;margin-bottom:14px;padding-bottom:14px}.filter-bar>*{grid-column:1 / -1;width:100%}.segmented-filter{display:flex;flex-wrap:wrap;gap:6px;width:100%}.problem-table{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);overflow:hidden}.table-row{align-items:center;border-bottom:1px solid var(--border);display:grid;grid-template-columns:72px minmax(220px,1.4fr) 120px 90px minmax(180px,1fr);gap:12px;min-height:48px;padding:0 16px}.table-row:last-child{border-bottom:0}.table-head{background:var(--panel-subtle);color:var(--muted);font-size:13px;font-weight:650}a.table-row:hover{background:color-mix(in srgb,var(--accent) 7%,transparent)}.problem-title{display:grid;gap:3px;font-weight:650}.problem-title small{color:var(--muted);font-size:12px;font-weight:500;text-transform:capitalize}.status-dot{border:1px solid var(--border);border-radius:999px;display:inline-block;height:12px;width:12px}.status-dot.solved{background:var(--success)}.status-dot.attempted{background:var(--warning)}.difficulty{border-radius:999px;display:inline-flex;font-size:12px;font-weight:700;justify-content:center;padding:4px 9px;text-transform:capitalize;width:fit-content}.difficulty.easy{background:color-mix(in srgb,var(--success) 12%,transparent);color:var(--success)}.difficulty.medium{background:color-mix(in srgb,var(--warning) 15%,transparent);color:var(--warning)}.difficulty.hard{background:color-mix(in srgb,var(--danger) 12%,transparent);color:var(--danger)}.tag-list{display:flex;flex-wrap:wrap;gap:6px;overflow:hidden}.tag-list b{background:var(--panel-subtle);border:1px solid var(--border);border-radius:999px;color:var(--muted);font-size:12px;padding:3px 8px}.admin-problem-row .tag-list{max-height:52px}.admin-problem-row .tag-list b{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.workspace{display:grid;gap:0;grid-template-columns:minmax(320px,var(--workspace-left, 40%)) 8px minmax(0,1fr);height:calc(100vh - 52px);overflow:hidden;padding:8px}.workspace[data-mode=exam]{grid-template-columns:minmax(320px,var(--workspace-left, 40%)) 8px minmax(0,1fr)}.problem-pane,.editor-pane{background:var(--panel);border:1px solid var(--border);border-radius:8px;min-width:0;overflow:hidden}.editor-pane{display:flex;flex-direction:column}.workspace-column-resizer{align-items:center;cursor:col-resize;display:flex;justify-content:center;touch-action:none}.workspace-column-resizer span{background:color-mix(in srgb,var(--muted) 25%,transparent);border-radius:999px;display:block;height:42px;width:3px}.workspace-column-resizer:hover span,.resizing-workspace .workspace-column-resizer span{background:var(--accent)}.resizing-workspace{cursor:col-resize;-webkit-user-select:none;user-select:none}.tabbar{background:var(--panel);border-bottom:1px solid var(--border);display:flex;height:44px;padding:0 10px}.tabbar button{background:transparent;border:0;border-bottom:2px solid transparent;color:var(--muted);cursor:pointer;padding:0 12px}.tabbar button.active{border-color:var(--accent);color:var(--text);font-weight:700}.problem-copy,.scoring-list,.community-panel{height:calc(100% - 44px);overflow:auto;padding:22px}.problem-heading{align-items:center;display:flex;gap:10px;justify-content:space-between}.problem-copy h1{font-size:24px}.example-box{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;margin-top:16px;padding:14px}pre{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);font-family:JetBrains Mono,SFMono-Regular,Consolas,monospace;font-size:13px;line-height:1.55;overflow:auto;padding:10px;white-space:pre-wrap}.scoring-row{align-items:center;border-bottom:1px solid var(--border);display:grid;gap:10px;grid-template-columns:20px 1fr 42px;padding:12px 0}.scoring-row svg{color:var(--accent)}.community-panel{display:grid;gap:14px}.community-section{border-bottom:1px solid var(--border);display:grid;gap:10px;padding-bottom:14px}.community-section-title{align-items:center;display:flex;gap:10px;justify-content:space-between}.community-section-title h2{margin-bottom:0}.community-section-title span{color:var(--muted);font-size:12px;font-weight:700}.community-section:last-child{border-bottom:0;padding-bottom:0}.difficulty-votes{display:grid;gap:8px;grid-template-columns:repeat(3,minmax(0,1fr))}.difficulty-votes.compact button{min-height:42px}.difficulty-votes button{align-items:center;background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);cursor:pointer;display:grid;gap:3px;min-height:52px;padding:7px;text-transform:capitalize}.difficulty-votes button.active{border-color:var(--accent);color:var(--accent)}.difficulty-results{display:grid;gap:7px}.difficulty-results>div{align-items:center;color:var(--muted);display:grid;font-size:13px;gap:8px;grid-template-columns:56px minmax(0,1fr) 28px 44px}.difficulty-results>div.active{color:var(--accent);font-weight:800}.vote-bar{background:var(--panel-subtle);border-radius:999px;height:8px;overflow:hidden}.vote-bar i{background:var(--accent);display:block;height:100%}.leaderboard-list,.comment-list{display:grid;gap:8px}.leaderboard-row{align-items:center;background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;display:grid;gap:8px;grid-template-columns:24px minmax(0,1fr) auto;min-height:42px;padding:8px}.leaderboard-row small{color:var(--muted);grid-column:2 / 4}.leaderboard-detail-link{align-items:center;color:var(--accent);display:inline-flex;font-size:13px;font-weight:800;gap:3px;width:fit-content}.problem-ranking-list{display:grid;gap:8px}.problem-ranking-row{align-items:center;background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:8px;grid-template-columns:42px 24px minmax(0,1fr) auto;min-height:44px;padding:8px 10px}.problem-ranking-row.rank-1,.leaderboard-table-row.rank-1:not(.leaderboard-table-head){background:color-mix(in srgb,#facc15 12%,var(--panel));border-color:color-mix(in srgb,#facc15 34%,var(--border))}.problem-ranking-row.rank-2,.leaderboard-table-row.rank-2:not(.leaderboard-table-head){background:color-mix(in srgb,#94a3b8 12%,var(--panel));border-color:color-mix(in srgb,#94a3b8 28%,var(--border))}.problem-ranking-row.rank-3,.leaderboard-table-row.rank-3:not(.leaderboard-table-head){background:color-mix(in srgb,#fb923c 11%,var(--panel));border-color:color-mix(in srgb,#fb923c 28%,var(--border))}.problem-ranking-row strong,.problem-ranking-row b{font-weight:900}.problem-ranking-row span,.problem-ranking-row small{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.problem-ranking-row small{color:var(--muted);grid-column:3 / 5}.leaderboard-table{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);overflow:hidden}.leaderboard-table-row{align-items:center;border-bottom:1px solid var(--border);display:grid;gap:12px;grid-template-columns:80px minmax(180px,1fr) 110px 130px 110px minmax(190px,1fr);min-height:50px;padding:0 16px}.leaderboard-table-row:not(.leaderboard-table-head){background:var(--panel)}.leaderboard-table-row:last-child{border-bottom:0}.leaderboard-table-head{background:var(--panel-subtle);color:var(--muted);font-size:13px;font-weight:650}.leaderboard-user-cell{align-items:center;display:inline-flex;gap:9px;min-width:0}.leaderboard-user-cell b{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.leaderboard-periods{background:var(--panel);border:1px solid var(--border);border-radius:999px;display:flex;gap:4px;padding:4px}.leaderboard-periods button{background:transparent;border:0;border-radius:999px;color:var(--muted);cursor:pointer;font-weight:800;min-height:30px;padding:0 12px}.leaderboard-periods button.active{background:var(--panel-subtle);color:var(--text)}.comment-box{display:grid;gap:8px}.comment-box textarea{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);min-height:82px;padding:9px;resize:vertical}.comment-item{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;padding:10px}.comment-item header{align-items:center;display:flex;gap:8px;justify-content:space-between;margin-bottom:6px}.comment-item small{color:var(--muted);font-size:12px}.comment-item p{color:var(--text);font-size:14px;margin-bottom:0;white-space:pre-wrap}.submission-history{align-content:start;display:grid;gap:8px;grid-auto-rows:minmax(54px,max-content);height:calc(100% - 44px);overflow:auto;padding:16px}.submission-row{align-items:center;background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;display:grid;gap:8px;grid-template-columns:92px 64px 78px;min-height:54px;padding:9px}.submission-row:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--border))}.submission-row small{color:var(--muted);grid-column:1 / 4}.editor-wrap{flex:1;min-height:0}.editor-toolbar{align-items:center;border-bottom:1px solid var(--border);display:flex;gap:12px;justify-content:space-between;min-height:44px;padding:0 10px}.editor-toolbar-title{align-items:center;color:var(--text);display:flex;font-weight:800;gap:7px;min-width:136px}.editor-toolbar-title svg{color:var(--success)}.editor-toolbar-title small{color:var(--muted);font-size:13px;font-weight:600}.editor-toolbar-actions{align-items:center;display:flex;gap:8px;min-width:0}.runner-resizer{align-items:center;background:var(--bg);cursor:row-resize;display:flex;flex:0 0 9px;justify-content:center;touch-action:none}.runner-resizer span{background:color-mix(in srgb,var(--muted) 28%,transparent);border-radius:999px;display:block;height:3px;width:38px}.runner-resizer:hover span,.resizing-runner .runner-resizer span{background:var(--accent)}.resizing-runner{cursor:row-resize;-webkit-user-select:none;user-select:none}.runner-pane{display:flex;flex:0 0 auto;flex-direction:column;min-height:170px;overflow:hidden}.runner-tabs{align-items:center;border-bottom:1px solid var(--border);display:flex;gap:4px;min-height:40px;padding:0 10px}.runner-tabs button{align-items:center;background:transparent;border:0;border-bottom:2px solid transparent;color:var(--muted);cursor:pointer;display:inline-flex;font-weight:700;height:40px;padding:0 10px}.runner-tabs button.active{border-color:var(--accent);color:var(--text)}.runner-content{flex:1;min-height:0;overflow:hidden}.stdin-panel{background:var(--panel);display:flex;flex-direction:column;gap:8px;height:100%;padding:10px 12px}.stdin-panel-header{align-items:center;color:var(--muted);display:flex;font-size:13px;font-weight:700;justify-content:space-between}.stdin-panel-header>div{align-items:center;display:flex;gap:10px}.case-mode-tabs,.case-tabs{align-items:center;display:flex;gap:6px}.case-mode-tabs button,.case-tabs button,.add-case-button{background:transparent;border:0;border-radius:8px;color:var(--muted);cursor:pointer;font-weight:750;min-height:34px;padding:0 12px}.case-mode-tabs button.active,.case-tabs button.active{background:var(--panel-subtle);color:var(--text)}.add-case-button{color:var(--muted);font-size:20px;min-width:34px;padding:0}.case-input-view,.source-input-view{display:flex;flex:1;flex-direction:column;gap:12px;min-height:0}.case-field,.source-input-view{display:flex;flex:1;flex-direction:column;gap:8px;min-height:0}.case-field span,.source-input-view span{color:var(--muted);font-size:13px;font-weight:700}.stdin-panel textarea,.case-field textarea,.source-input-view textarea{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);flex:1;font-family:JetBrains Mono,SFMono-Regular,Consolas,monospace;font-size:13px;line-height:1.45;min-height:0;padding:8px;resize:none}.text-button{background:transparent;border:0;color:var(--accent);cursor:pointer;font-size:13px;font-weight:700;padding:0}.switch-row{align-items:center;color:var(--muted);display:inline-flex;gap:6px;white-space:nowrap}.switch-row input{accent-color:var(--accent)}.exam-strip{background:color-mix(in srgb,var(--warning) 13%,var(--panel));border-bottom:1px solid var(--border);color:var(--text);font-size:13px;padding:9px 14px}.primary-button,.secondary-button,.ghost-button,.icon-button{align-items:center;border:1px solid transparent;border-radius:6px;cursor:pointer;display:inline-flex;gap:7px;justify-content:center;min-height:34px;padding:0 13px}.primary-button{background:var(--accent);color:#fff;font-weight:700}.primary-button:hover{background:var(--accent-strong)}.secondary-button{background:var(--panel-subtle);border-color:var(--border);color:var(--text)}.ghost-button{background:transparent;color:var(--muted)}.icon-button{background:var(--panel-subtle);border-color:var(--border);color:var(--text);min-width:34px;padding:0}.icon-button.filled{background:var(--accent);color:#fff}.small{min-height:30px;padding:0 10px}button:disabled{cursor:not-allowed;opacity:.62}.result-panel{height:100%;overflow:auto;padding:12px}.result-section{display:grid;gap:9px;margin-bottom:14px}.result-section:last-child{margin-bottom:0}.result-section h3{color:var(--muted);font-size:13px;margin:0}.result-section.error-first h3{color:var(--danger);font-size:18px}.result-summary{align-items:center;display:flex;justify-content:space-between;margin-bottom:2px}.result-status{border-radius:999px;font-size:12px;font-weight:800;padding:4px 8px;text-transform:uppercase}.result-status.accepted{background:color-mix(in srgb,var(--success) 12%,transparent);color:var(--success)}.result-status.partial{background:color-mix(in srgb,var(--warning) 15%,transparent);color:var(--warning)}.result-status.failed,.result-status.error{background:color-mix(in srgb,var(--danger) 12%,transparent);color:var(--danger)}.case-result{border:1px solid var(--border);border-radius:8px;margin-top:8px}.case-result summary{align-items:center;cursor:pointer;display:flex;justify-content:space-between;padding:10px}.point-list{border-top:1px solid var(--border);padding:8px 10px}.point-list div{align-items:center;display:flex;justify-content:space-between;padding:5px 0}.point-list .passed{color:var(--success)}.point-list .failed{color:var(--danger)}.stdout,.stderr,.input-output{margin:0}.stderr{background:color-mix(in srgb,var(--danger) 8%,var(--panel-subtle));color:var(--danger)}.ai-title{align-items:center;border-bottom:1px solid var(--border);display:flex;font-weight:700;gap:8px;height:42px;padding:0 12px}.ai-title .ghost-icon{margin-left:auto}.ai-launcher{align-items:center;background:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 80%,white);border-radius:999px;bottom:18px;box-shadow:0 12px 28px #2548d63d;color:#fff;cursor:pointer;display:inline-flex;font-weight:800;gap:7px;min-height:42px;padding:0 15px;position:fixed;right:18px;z-index:30}.ai-launcher.active{background:var(--accent-strong)}.ai-drawer{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 18px 48px #0f172a3d;contain:layout paint;display:flex;flex-direction:column;min-height:0;overscroll-behavior:contain;overflow:hidden;position:fixed;z-index:34}.ai-title{align-items:center;background:var(--panel-subtle);border-bottom:1px solid var(--border);cursor:move;display:flex;gap:8px;min-height:38px;padding:0 10px;-webkit-user-select:none;user-select:none}.ai-title span{flex:1;font-weight:900}.ai-messages{flex:1;min-height:0;overscroll-behavior:contain;overflow:auto;overflow-anchor:none;padding:12px;scrollbar-width:none}.ai-messages::-webkit-scrollbar,.ai-input textarea::-webkit-scrollbar{display:none;height:0;width:0}.ai-message-row{display:flex;margin-bottom:10px}.ai-message-row.user{justify-content:flex-end}.ai-message-row.assistant{justify-content:flex-start}.ai-bubble{border-radius:8px;font-size:14px;line-height:1.55;min-width:54px;padding:10px;overflow-wrap:anywhere}.ai-bubble.user{background:color-mix(in srgb,var(--accent) 12%,transparent);max-width:calc(50% - 8px)}.ai-bubble.assistant{background:var(--panel-subtle);border:1px solid var(--border);max-width:100%;width:100%}.ai-input{border-top:1px solid var(--border);display:grid;align-items:end;gap:8px;grid-template-columns:1fr 36px;padding:10px 24px 14px 10px}.ai-input textarea{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);line-height:1.45;min-height:38px;overscroll-behavior:contain;padding:8px 9px;resize:none;scrollbar-width:none}.ai-resize-handle{border-bottom:3px solid color-mix(in srgb,var(--muted) 45%,transparent);border-right:3px solid color-mix(in srgb,var(--muted) 45%,transparent);bottom:3px;cursor:nwse-resize;height:14px;position:absolute;right:3px;width:14px;z-index:2}.ai-bubble p,.ai-bubble ul,.ai-bubble ol,.ai-bubble pre{margin-bottom:10px}.ai-bubble p:last-child,.ai-bubble ul:last-child,.ai-bubble ol:last-child,.ai-bubble pre:last-child{margin-bottom:0}.ai-bubble code{background:color-mix(in srgb,var(--accent) 8%,var(--panel));border:1px solid var(--border);border-radius:5px;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:.92em;padding:1px 4px}.ai-code-block{border:1px solid var(--border);border-radius:8px;overflow:hidden}.ai-code-head{align-items:center;background:var(--panel);border-bottom:1px solid var(--border);color:var(--muted);display:flex;font-size:12px;font-weight:800;justify-content:space-between;min-height:30px;padding:0 8px}.ai-code-head button{align-items:center;background:transparent;border:0;color:var(--muted);cursor:pointer;display:inline-flex;font-size:12px;gap:4px}.ai-code-block pre,.ai-mermaid-error{background:#0f1724;color:#dbe6ff;margin:0;overflow:auto;padding:10px}.ai-mermaid-error{border:1px solid var(--border);border-radius:8px;max-height:180px;white-space:pre-wrap}.ai-code-block pre code{background:transparent;border:0;color:inherit;padding:0}.ai-mermaid{background:var(--panel);border:1px solid var(--border);border-radius:8px;color:var(--text);cursor:zoom-in;display:block;font:inherit;overflow:auto;padding:10px;text-align:left;width:100%}.ai-mermaid img{display:block;max-width:100%}.ai-thinking{align-items:center;display:inline-flex;gap:5px;height:20px}.ai-thinking i{animation:ai-thinking-bounce 1s infinite ease-in-out;background:var(--muted);border-radius:999px;display:block;height:6px;width:6px}.ai-thinking i:nth-child(2){animation-delay:.12s}.ai-thinking i:nth-child(3){animation-delay:.24s}@keyframes ai-thinking-bounce{0%,80%,to{opacity:.36;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}.diagram-modal{align-items:center;background:#050912d1;display:flex;inset:0;justify-content:center;overflow:hidden;padding:44px;position:fixed;z-index:80}.diagram-modal-content{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 24px 80px #00000057;max-height:82vh;max-width:86vw;overflow:auto;padding:24px;transform-origin:center;transition:transform .08s ease}.diagram-modal-content img{display:block;height:auto;max-width:none}.diagram-close{align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:999px;color:var(--text);cursor:pointer;display:flex;height:38px;justify-content:center;position:fixed;right:26px;top:24px;width:38px;z-index:81}.auth-chip{align-items:center;background:var(--panel-subtle);border:1px solid var(--border);border-radius:999px;display:flex;gap:7px;padding:4px 8px}.user-avatar{align-items:center;background:linear-gradient(135deg,var(--accent),#111827);border-radius:999px;color:#fff;display:inline-flex;flex:0 0 auto;font-weight:950;justify-content:center;overflow:hidden}.user-avatar img{display:block;height:100%;object-fit:cover;width:100%}.user-avatar.tiny{font-size:12px;height:22px;width:22px}.user-avatar.medium{font-size:22px;height:48px;width:48px}.user-avatar.large{box-shadow:inset 0 0 0 1px #ffffff38;font-size:34px;height:92px;margin-bottom:8px;width:92px}.ghost-icon,.link-button{background:transparent;border:0;color:var(--muted);cursor:pointer;padding:2px}.auth-error,.error-line{color:var(--danger);font-size:12px}.auth-help{color:var(--muted);font-size:12px;line-height:1.4;margin:-4px 0 0}.modal-backdrop{align-items:center;background:#090e1885;display:flex;inset:0;justify-content:center;padding:18px;position:fixed;z-index:40}.auth-modal{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 24px 80px #0000003d;display:grid;gap:16px;max-width:420px;padding:18px;width:100%}.auth-modal-head{align-items:start;display:flex;gap:14px;justify-content:space-between}.auth-modal-head p{font-size:13px;margin-bottom:2px}.auth-modal-head h1{font-size:24px;margin-bottom:0}.auth-tabs{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:4px;grid-template-columns:1fr 1fr;padding:4px}.auth-tabs button{align-items:center;background:transparent;border:0;border-radius:6px;color:var(--muted);cursor:pointer;display:flex;gap:6px;justify-content:center;min-height:34px}.auth-tabs button.active{background:var(--panel);box-shadow:var(--shadow);color:var(--text);font-weight:800}.oauth-section{display:grid;gap:7px}.oauth-button{align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:8px;color:var(--text);cursor:pointer;display:flex;font-weight:850;gap:10px;height:40px;justify-content:center}.oauth-privacy-note{color:var(--muted);font-size:11px;line-height:1.45;margin:0}.oauth-privacy-note a{color:var(--accent);font-weight:800}.google-logo{background:#fff;border-radius:999px;box-shadow:0 0 0 1px #0f172a14;height:22px;padding:3px;width:22px}.auth-form{display:grid;gap:12px}.auth-form label{display:grid;gap:6px}.auth-form label span{color:var(--muted);font-size:13px;font-weight:700}.auth-form input{background:var(--panel-subtle);height:38px}.turnstile-box{min-height:65px}.muted{color:var(--muted);font-size:14px}.empty-state{align-items:center;color:var(--muted);display:flex;justify-content:center;min-height:180px;padding:24px}.empty-state.compact{align-items:flex-start;justify-content:flex-start}.error-card{background:color-mix(in srgb,var(--danger) 8%,var(--panel));border:1px solid color-mix(in srgb,var(--danger) 24%,var(--border));border-radius:8px;color:var(--danger);margin-bottom:14px;padding:12px}.settings-panel{background:var(--panel);border:1px solid var(--border);border-radius:8px;display:grid;gap:12px;max-width:460px;margin-bottom:16px;padding:16px}.profile-page{display:grid;gap:24px;grid-template-columns:300px minmax(0,1fr);margin:0 auto;max-width:1360px;padding:28px 20px 56px}.profile-sidebar{align-self:start;display:grid;gap:14px;position:sticky;top:76px}.profile-user-card,.profile-menu,.profile-progress-card,.profile-badge-card,.profile-contribution-card,.profile-mock-card,.profile-activity-card,.profile-settings-card{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow)}.profile-user-card{display:grid;gap:7px;padding:18px}.profile-avatar-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.profile-avatar{align-items:center;background:linear-gradient(135deg,var(--accent),#111827);border-radius:8px;color:#fff;display:flex;font-size:34px;font-weight:950;height:86px;justify-content:center;margin-bottom:8px;width:86px}.profile-user-card span,.profile-user-card p{color:var(--muted);margin-bottom:0}.profile-user-card .user-avatar{color:#fff}.avatar-modal{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 24px 80px #00000042;display:grid;gap:16px;max-width:560px;padding:18px;width:min(100%,560px)}.avatar-crop-layout{align-items:center;display:grid;gap:18px;grid-template-columns:1fr 128px}.avatar-crop-stage,.avatar-crop-preview{background:var(--panel-subtle);border:1px solid var(--border);overflow:hidden;position:relative}.avatar-crop-stage{aspect-ratio:1;border-radius:8px;touch-action:none}.avatar-crop-image{height:100%;object-fit:contain;width:100%}.avatar-crop-circle{align-items:center;border:2px solid rgba(255,255,255,.96);border-radius:999px;box-shadow:0 0 0 999px #090e187a,0 10px 30px #0003;color:#fff;cursor:grab;display:flex;font-size:12px;font-weight:900;justify-content:center;position:absolute;-webkit-user-select:none;user-select:none}.avatar-crop-circle:active{cursor:grabbing}.avatar-crop-circle span{background:#0f172ab8;border-radius:999px;padding:5px 9px}.avatar-crop-preview{align-items:center;aspect-ratio:1;border-radius:999px;display:flex;justify-content:center}.avatar-crop-preview img{height:100%;object-fit:cover;width:100%}.avatar-crop-empty{align-items:center;color:var(--muted);display:flex;font-weight:800;height:100%;justify-content:center}.avatar-controls{display:grid;gap:12px}.avatar-controls p{color:var(--muted);font-size:13px;margin-bottom:0}.avatar-upload-button{align-items:center;background:var(--panel-subtle);border:1px dashed var(--border);border-radius:8px;cursor:pointer;display:inline-flex;font-weight:800;gap:8px;justify-content:center;min-height:42px}.avatar-upload-button input{display:none}.avatar-modal-actions{display:flex;gap:10px;justify-content:flex-end}.profile-menu{display:grid;gap:4px;padding:8px}.profile-menu button{align-items:center;background:transparent;border:0;border-radius:6px;color:var(--muted);cursor:pointer;display:flex;font-weight:800;gap:9px;min-height:38px;padding:0 10px}.profile-menu button.active,.profile-menu button:hover{background:var(--panel-subtle);color:var(--text)}.profile-main{display:grid;gap:18px;min-width:0}.profile-summary-grid{display:grid;gap:18px;grid-template-columns:minmax(0,1fr) minmax(260px,.55fr)}.profile-progress-card{align-items:center;display:grid;gap:22px;grid-template-columns:230px minmax(0,1fr);min-height:210px;padding:24px}.profile-ring{align-items:center;background:radial-gradient(circle,var(--panel) 58%,transparent 59%),conic-gradient(var(--accent) var(--profile-progress, 0%),color-mix(in srgb,var(--accent) 12%,var(--border)) 0);border-radius:999px;display:grid;height:168px;justify-items:center;place-content:center;width:168px}.profile-ring strong{font-size:34px}.profile-ring strong span{color:var(--muted);font-size:18px}.profile-ring small{color:var(--muted);font-weight:800}.profile-difficulty-stack{display:grid;gap:12px}.profile-difficulty-stack div{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:7px;grid-template-columns:78px 1fr;padding:10px}.profile-difficulty-stack b{justify-self:end}.profile-difficulty-stack i{background:color-mix(in srgb,var(--accent) 58%,var(--panel));border-radius:999px;display:block;grid-column:1 / 3;height:7px}.profile-badge-card{display:grid;min-height:210px;padding:24px}.profile-badge-card span,.profile-section-head span{color:var(--muted);font-size:13px;font-weight:800}.profile-badge-card strong{font-size:48px}.profile-badge-card p{align-self:end;margin-bottom:0}.profile-section-head{align-items:center;display:flex;gap:14px;justify-content:space-between;margin-bottom:16px}.profile-section-head h2{margin-bottom:0}.profile-section-head a{color:var(--accent);font-weight:800}.profile-contribution-card,.profile-mock-card,.profile-activity-card,.profile-settings-card{padding:20px}.mock-progress-chart{display:grid;gap:12px}.mock-progress-chart svg{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;height:180px;overflow:visible;padding:10px;width:100%}.mock-progress-chart polyline{fill:none;stroke:var(--accent);stroke-linecap:round;stroke-linejoin:round;stroke-width:3;vector-effect:non-scaling-stroke}.mock-progress-chart circle{fill:var(--panel);stroke:var(--accent);stroke-width:2;vector-effect:non-scaling-stroke}.profile-mock-row,.mock-result-row{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px}.profile-mock-row strong{color:var(--accent);font-weight:900}.profile-mock-row small{color:var(--muted);font-size:12px}.profile-mock-row{align-items:center;display:grid;gap:10px;grid-template-columns:minmax(0,1fr) 64px minmax(150px,auto);margin-top:8px;min-height:42px;padding:8px 10px}.profile-mock-row span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.contribution-grid{display:grid;gap:4px;grid-auto-flow:column;grid-template-rows:repeat(7,10px);justify-content:start;overflow:hidden}.contribution-grid span{background:var(--panel-subtle);border-radius:2px;display:block;height:10px;width:10px}.contribution-grid .intensity-1{background:color-mix(in srgb,var(--accent) 28%,var(--panel-subtle))}.contribution-grid .intensity-2{background:color-mix(in srgb,var(--accent) 48%,var(--panel-subtle))}.contribution-grid .intensity-3{background:color-mix(in srgb,var(--accent) 68%,var(--panel-subtle))}.contribution-grid .intensity-4{background:var(--accent)}.profile-usage-row{border-top:1px solid var(--border);color:var(--muted);display:flex;flex-wrap:wrap;gap:16px;margin-top:16px;padding-top:14px}.profile-activity-row{align-items:center;border-top:1px solid var(--border);color:var(--text);display:grid;gap:12px;grid-template-columns:94px minmax(0,1fr) 70px minmax(170px,auto);min-height:50px;padding:10px 0}.profile-activity-row small{color:var(--muted);justify-self:end}.profile-settings-card .settings-panel{box-shadow:none}.settings-panel label{display:grid;gap:6px}.settings-panel label span{color:var(--muted);font-size:13px;font-weight:700}.settings-panel input{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);height:36px;padding:0 10px}.admin-import{max-width:920px}.admin-main-content{min-height:100vh}.admin-login-page{background:radial-gradient(circle at 18% 12%,color-mix(in srgb,var(--accent) 18%,transparent),transparent 32%),var(--bg);min-height:100vh;padding:22px}.admin-login-shell{align-items:center;display:flex;justify-content:space-between;margin:0 auto;max-width:1120px}.admin-login-card{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);display:grid;gap:14px;margin:13vh auto 0;max-width:420px;padding:24px}.admin-login-card h1{margin-bottom:0}.admin-login-card p,.admin-kicker{color:var(--muted)}.admin-kicker{font-size:12px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.admin-login-card label{display:grid;gap:6px}.admin-login-card label span{color:var(--muted);font-size:13px;font-weight:800}.admin-login-card input{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);height:40px;padding:0 10px}.admin-page{background:var(--bg);min-height:100vh;padding:0 20px 48px}.admin-topbar{align-items:center;background:color-mix(in srgb,var(--panel) 94%,transparent);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;margin:0 -20px 24px;min-height:52px;padding:0 20px;position:sticky;top:0;z-index:20}.admin-topbar-actions{align-items:center;color:var(--muted);display:flex;gap:12px;font-size:13px;font-weight:800}.admin-page-header,.admin-page .admin-problems,.admin-page .admin-users,.admin-tabs,.admin-page .settings-panel{margin-left:auto;margin-right:auto;max-width:1180px}.admin-tabs{display:flex;gap:8px;margin-bottom:18px}.admin-tabs button{align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:8px;color:var(--muted);cursor:pointer;display:inline-flex;font-weight:900;gap:8px;min-height:40px;padding:0 14px}.admin-tabs button.active,.admin-tabs button:hover{background:var(--panel-subtle);color:var(--text)}.admin-users{display:grid;gap:14px}.admin-user-search{align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:8px;display:grid;gap:8px;grid-template-columns:18px minmax(180px,260px) auto;padding:6px 8px}.admin-user-search input{background:transparent;border:0;color:var(--text);height:30px;outline:none}.admin-user-layout{align-items:start;display:grid;gap:16px;grid-template-columns:minmax(0,1fr) 320px}.admin-user-table,.admin-user-editor{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);overflow:auto}.admin-user-row{align-items:center;border-bottom:1px solid var(--border);display:grid;gap:12px;grid-template-columns:minmax(220px,1.25fr) minmax(118px,.6fr) 82px 96px minmax(150px,.85fr) minmax(190px,1fr);min-height:58px;min-width:920px;padding:10px 14px}.admin-user-row>span,.admin-user-row>div{min-width:0;overflow:hidden}.admin-user-row:last-child{border-bottom:0}.admin-user-row.selected{background:color-mix(in srgb,var(--accent) 8%,var(--panel))}.admin-user-head{background:var(--panel-subtle);color:var(--muted);font-size:13px;font-weight:800;min-height:42px}.admin-user-identity,.admin-selected-user,.admin-user-actions{align-items:center;display:flex;gap:10px;min-width:0}.admin-user-actions{flex-wrap:wrap}.admin-user-identity strong,.admin-user-identity small,.admin-selected-user strong,.admin-selected-user small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.admin-user-identity small,.admin-selected-user small{color:var(--muted);font-size:12px}.role-badge{border-radius:999px;font-size:12px;font-weight:900;padding:5px 9px;text-transform:capitalize;width:fit-content}.role-badge.admin{background:color-mix(in srgb,var(--accent) 14%,var(--panel));color:var(--accent)}.role-badge.student{background:var(--panel-subtle);color:var(--muted)}.admin-user-editor{display:grid;gap:12px;min-width:0;padding:18px}.admin-user-editor h2{margin-bottom:0}.admin-user-editor p{color:var(--muted);margin-bottom:0}.admin-user-editor label{display:grid;gap:6px}.admin-user-editor label span{color:var(--muted);font-size:13px;font-weight:800}.admin-user-editor input{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);height:36px;padding:0 10px}.admin-import textarea,.admin-import input{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text)}.admin-import textarea{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:13px;line-height:1.5;min-height:520px;padding:12px;resize:vertical}.admin-import input{height:38px;padding:0 10px}.admin-prompt-preview{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;padding:10px 12px}.admin-prompt-preview summary{cursor:pointer;font-weight:900}.admin-prompt-preview pre{color:var(--muted);font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:12px;max-height:260px;overflow:auto;white-space:pre-wrap}.admin-problems{margin-bottom:18px}.admin-section-title{align-items:center;display:flex;justify-content:space-between;margin-bottom:8px;max-width:1100px}.admin-section-title h2{margin-bottom:0}.admin-problem-table{background:var(--panel);border:1px solid var(--border);border-radius:8px;max-width:100%;overflow-x:auto;overflow-y:hidden}.admin-problem-row{align-items:center;border-bottom:1px solid var(--border);display:grid;gap:12px;grid-template-columns:96px minmax(124px,.55fr) minmax(190px,1.05fr) minmax(130px,.75fr) minmax(82px,.45fr) minmax(170px,1fr) minmax(240px,1.2fr);min-height:54px;min-width:1040px;padding:10px 14px}.admin-problem-row:last-child{border-bottom:0}.admin-problem-row span{min-width:0;overflow:hidden}.admin-problem-row strong,.admin-problem-row small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.admin-id-cell{color:var(--muted);font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:11px;overflow:hidden;text-overflow:ellipsis}.copy-id-button{align-items:center;background:transparent;border:0;color:var(--muted);cursor:pointer;display:grid;gap:5px;grid-template-columns:minmax(0,1fr) 14px auto;max-width:100%;padding:0;text-align:left;width:100%}.copy-id-button span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.copy-id-button b{font-family:inherit;font-size:10px;font-weight:900}.admin-problem-row small{color:var(--muted);font-size:12px;margin-top:3px}.admin-problem-head{background:var(--panel-subtle);color:var(--muted);font-size:13px;font-weight:700;min-height:42px}.publish-badge{border-radius:999px;display:inline-flex;font-size:12px;font-weight:800;justify-content:center;padding:4px 8px;width:fit-content}.publish-badge.published{background:color-mix(in srgb,var(--success) 12%,transparent);color:var(--success)}.publish-badge.draft{background:color-mix(in srgb,var(--muted) 12%,transparent);color:var(--muted)}.success-line{color:var(--success);font-size:13px;margin:0}.danger-zone{border-color:color-mix(in srgb,var(--danger) 28%,var(--border))}.danger-zone p{margin-bottom:0}.danger-button{align-items:center;background:var(--danger);border:1px solid transparent;border-radius:6px;color:#fff;cursor:pointer;display:inline-flex;font-weight:700;justify-content:center;min-height:34px;padding:0 13px;width:fit-content}.danger-button.small{font-size:12px;min-height:30px;padding:0 10px}.admin-form-actions{display:flex;flex-wrap:wrap;gap:10px}.admin-activity-panel{border-top:1px solid var(--border);display:grid;gap:8px;margin-top:8px;padding-top:12px}.admin-activity-row{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;display:grid;gap:3px;padding:8px}.admin-activity-row span,.admin-activity-row small{color:var(--muted);font-size:12px}.agent-scope-list{display:flex;flex-wrap:wrap;gap:8px}.agent-scope-list b,.agent-scope-list span{background:var(--panel-subtle);border:1px solid var(--border);border-radius:999px;color:var(--muted);font-size:12px;font-weight:800;padding:6px 10px}.agent-key-output{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);overflow-x:auto;padding:12px}.admin-assets{max-width:1180px}.admin-assets .admin-section-title{max-width:none}.asset-list,.agent-key-list{display:grid;gap:10px}.asset-row{align-items:center;background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:12px;grid-template-columns:64px minmax(0,1fr) auto;padding:10px}.asset-row img{aspect-ratio:1;border-radius:8px;object-fit:cover;width:64px}.asset-row small{color:var(--muted);display:block;font-size:12px;margin-top:2px}.agent-key-list{border-top:1px solid var(--border);margin-top:8px;padding-top:12px}.agent-key-list article{background:var(--panel-subtle);border:1px solid var(--border);border-radius:8px;display:grid;gap:10px;grid-template-columns:minmax(160px,.7fr) minmax(0,1fr) minmax(150px,auto) auto;padding:10px}.agent-key-list article.revoked{opacity:.62}.agent-key-list small{color:var(--muted);display:block;font-size:12px}.mock-result-list,.mock-question-results{display:grid;gap:12px}.mock-result-row{align-items:center;color:var(--text);display:grid;gap:12px;grid-template-columns:28px minmax(0,1fr) 72px 90px 18px;min-height:62px;padding:12px}.mock-result-row small,.mock-result-row em{color:var(--muted);font-style:normal}.mock-result-row b{color:var(--accent);font-size:20px}.mock-result-hero{align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);display:flex;gap:20px;justify-content:space-between;margin:18px 0;padding:20px}.mock-result-hero span,.mock-result-hero p,.mock-question-card header span{color:var(--muted)}.mock-score-card{background:color-mix(in srgb,var(--accent) 10%,var(--panel));border:1px solid color-mix(in srgb,var(--accent) 30%,var(--border));border-radius:8px;display:grid;justify-items:center;min-width:148px;padding:18px}.mock-score-card strong{color:var(--accent);font-size:38px}.mock-question-card{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);display:grid;gap:16px;padding:18px}.mock-question-card header{align-items:center;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;padding-bottom:12px}.mock-question-card header strong{color:var(--accent);font-size:24px}.mock-answer-grid{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr))}.security-events h2{font-size:16px;margin-bottom:0}.security-event{border-top:1px solid var(--border);display:grid;gap:4px;padding-top:10px}.security-event span,.security-event small{color:var(--muted);font-size:12px}.exam-grid{display:grid;gap:10px}.exam-row{align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:8px;display:grid;gap:14px;grid-template-columns:28px 1fr 120px 110px;padding:14px}.exam-row h2{font-size:17px;margin-bottom:3px}.exam-row p{margin-bottom:0}.exam-row>span{align-items:center;color:var(--muted);display:inline-flex;gap:5px}.exam-page{height:calc(100vh - 52px);overflow:hidden}.exam-header{align-items:center;background:var(--panel);border-bottom:1px solid var(--border);display:flex;gap:12px;height:48px;padding:0 12px}.exam-header>span{color:var(--accent);font-weight:800;min-width:58px}.exam-page .workspace{height:calc(100vh - 100px)}.exam-switcher{display:flex;flex:1;gap:6px}.exam-switcher button{background:var(--panel-subtle);border:1px solid var(--border);border-radius:6px;color:var(--text);cursor:pointer;height:30px;min-width:38px}.exam-switcher button.active{border-color:var(--accent);color:var(--accent);font-weight:800}.split-page{display:grid;gap:20px;grid-template-columns:1fr 1fr}.code-readonly{min-height:440px}@media(max-width:1720px){.hero-workspace-preview{opacity:.82;right:-260px}}@media(max-width:1380px){.hero-workspace-preview{right:-360px}}@media(max-width:1120px){.study-layout,.study-path{grid-template-columns:1fr}.study-plan-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.study-detail-grid,.my-study-layout,.profile-page,.profile-summary-grid{grid-template-columns:1fr}.profile-sidebar{position:static}.study-path-panel{grid-column:auto}.problemset-page{grid-template-columns:200px minmax(0,1fr)}.workspace,.workspace[data-mode=exam]{grid-template-columns:1fr;grid-template-rows:minmax(0,42%) minmax(0,58%);height:calc(100vh - 52px)}.workspace-column-resizer{display:none}.problem-pane,.editor-pane,.editor-wrap{min-height:0}}@media(max-width:760px){.topbar{flex-wrap:wrap;height:auto;padding:8px}.brand{min-width:112px}.main-nav{flex:0 0 100%;order:3;overflow-x:auto;width:100%}.topbar-actions{gap:6px}.auth-link-button,.auth-signup-button{padding:0 8px}.search-popover{left:8px;right:8px;top:92px;width:auto}.search-popover form{grid-template-columns:20px 1fr 34px}.search-popover .secondary-button{display:none}.landing-hero{min-height:660px;padding:58px 20px 72px}.hero-workspace-preview{display:none}.landing-hero h1{font-size:52px}.landing-flow{grid-template-columns:1fr;padding:32px 20px 56px}.landing-feature-card{min-height:190px;padding:22px}.problemset-page{grid-template-columns:1fr;padding:18px 12px 34px}.study-page{padding:22px 12px 38px}.study-header{align-items:flex-start}.study-topbar,.custom-plan-panel,.study-detail-hero{align-items:stretch;display:grid;grid-template-columns:1fr}.study-view-actions{overflow-x:auto}.study-plan-grid,.weekday-picker{grid-template-columns:1fr}.study-detail-hero{padding:28px}.study-plan-art.large,.study-plan-icon.large{display:none}.study-stats{grid-template-columns:1fr}.knowledge-row div:first-child{align-items:flex-start;display:grid}.problemset-sidebar{position:static}.sidebar-tags{display:none}.problemset-header{align-items:stretch;display:grid}.problemset-stats{flex-wrap:wrap}.filter-bar{align-items:stretch;display:grid}.table-row{grid-template-columns:36px 1fr 88px}.table-head span:first-child{visibility:hidden}.table-row span:nth-child(4),.table-row span:nth-child(5),.table-head span:nth-child(4),.table-head span:nth-child(5){display:none}.leaderboard-table-row{grid-template-columns:56px 1fr 72px}.leaderboard-table-row span:nth-child(4),.leaderboard-table-row span:nth-child(5),.leaderboard-table-row span:nth-child(6),.leaderboard-table-head span:nth-child(4),.leaderboard-table-head span:nth-child(5),.leaderboard-table-head span:nth-child(6){display:none}.page-header,.exam-row,.split-page,.mock-answer-grid,.mock-result-hero,.profile-progress-card{align-items:stretch;grid-template-columns:1fr}.mock-result-hero{display:grid}.mock-result-row,.profile-mock-row,.agent-key-list article,.asset-row{grid-template-columns:1fr}.profile-activity-row{grid-template-columns:1fr}.profile-activity-row small{justify-self:start}.contribution-grid{grid-template-rows:repeat(7,8px)}.contribution-grid span{height:8px;width:8px}.admin-user-layout{grid-template-columns:1fr}.admin-tabs{overflow-x:auto}.admin-problem-row{grid-template-columns:96px minmax(124px,.55fr) minmax(190px,1.05fr) minmax(130px,.75fr) minmax(82px,.45fr) minmax(170px,1fr) minmax(240px,1.2fr)}}