@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-bg: #f5ead8;--color-surface: #ebddc5;--color-text: #201e1d;--color-accent: #c67139;--color-accent-2: #7a8a5e;--color-divider: color-mix(in srgb, #201e1d 16%, transparent);--color-neutral-100: #f9f4ed;--color-neutral-200: #eee7db;--color-neutral-300: #dcd3c4;--color-neutral-700: #645c50;--color-neutral-800: #474238;--color-neutral-900: #2e2b25;--color-accent-200: #ffe1d0;--color-accent-300: #f0b48a;--color-accent-2-200: #e1eecc;--color-accent-2-800: #3d472b;--shadow-sm: 0 1px 4px color-mix(in srgb, #2e2b25 12%, transparent);--font-heading: "Caprasimo", Georgia, serif;--font-body: "Figtree", "Segoe UI", system-ui, sans-serif;--space-2: .55rem;--space-3: .825rem;--space-4: 1.1rem;--space-6: 1.65rem;--space-8: 2.2rem;--radius-sm: 8px;--radius-md: 16px;--radius-lg: 28px;--shadow-md: 0 3px 10px color-mix(in srgb, #2e2b25 16%, transparent);--shadow-lg: 0 12px 32px color-mix(in srgb, #2e2b25 22%, transparent)}*,*:before,*:after{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;background:radial-gradient(circle at 90% 10%,var(--color-accent-200),transparent 42%),radial-gradient(circle at 8% 88%,var(--color-accent-2-200),transparent 40%),var(--color-bg);color:var(--color-text);font-family:var(--font-body);line-height:1.5}h1,h2,h3{font-family:var(--font-heading);font-weight:400;margin:0}a{color:var(--color-accent-2-800)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:44px;padding:.7rem 1.2rem;border-radius:999px;border:1px solid transparent;font:inherit;font-weight:600;cursor:pointer;text-decoration:none}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--color-accent-2-800);color:var(--color-neutral-100)}.btn-secondary{background:transparent;border-color:color-mix(in srgb,var(--color-text) 28%,transparent);color:var(--color-text)}.btn-ghost{background:transparent;color:var(--color-text)}.btn-block{width:100%}.input{width:100%;min-height:44px;padding:.65rem .9rem;border-radius:var(--radius-sm);border:1px solid color-mix(in srgb,var(--color-text) 22%,transparent);background:var(--color-neutral-100);font:inherit}.input:focus{outline:2px solid var(--color-accent);outline-offset:1px}.label{display:block;font-size:.9rem;font-weight:600;margin-bottom:.35rem}.field{margin-bottom:var(--space-4)}.field-error{color:#8c2f1a;font-size:.85rem;margin-top:.3rem}.form-error{background:#fde8e2;border-radius:var(--radius-sm);padding:.75rem .9rem;margin-bottom:var(--space-4);color:#8c2f1a}.card{background:color-mix(in srgb,var(--color-neutral-100) 88%,transparent);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:var(--space-6)}.tag{display:inline-flex;align-items:center;padding:.2rem .65rem;border-radius:999px;background:var(--color-accent-2-200);color:var(--color-accent-2-800);font-size:.8rem;font-weight:600}.site-header,.site-footer{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-4) var(--space-6)}.brand{font-family:var(--font-heading);font-size:1.6rem;text-decoration:none;color:inherit}.brand-mark{width:2.5rem;height:2.5rem;border-radius:1rem;background:var(--color-accent-2-800);color:var(--color-neutral-100);display:grid;place-items:center;font-family:var(--font-heading);font-size:1.4rem}.nav-actions{display:flex;gap:.5rem;flex-wrap:wrap}.welcome{max-width:56rem;margin:0 auto;padding:var(--space-8) var(--space-6) var(--space-8)}.welcome-hero{display:grid;gap:var(--space-6)}.welcome-hero h1{font-size:clamp(2.4rem,6vw,4rem);line-height:1.05;max-width:12ch}.lede{font-size:1.15rem;color:var(--color-neutral-700);max-width:36ch}.cta-row{display:flex;flex-wrap:wrap;gap:.75rem}.auth-split{min-height:100vh;display:grid}@media(min-width:900px){.auth-split{grid-template-columns:1fr 1fr}}.auth-aside{background:var(--color-accent-2-800);color:var(--color-neutral-100);padding:var(--space-8);display:grid;align-content:center;gap:var(--space-4)}.auth-aside h1{font-size:clamp(2rem,4vw,3rem);line-height:1.1}.auth-panel{padding:var(--space-8) var(--space-6);display:grid;align-content:center}.auth-panel-inner{width:min(100%,26rem);margin:0 auto}.auth-panel h1{font-size:2rem;margin-bottom:.35rem}.muted{color:var(--color-neutral-700)}.password-row{display:grid;grid-template-columns:1fr auto;gap:.5rem;align-items:center}.strength{height:6px;border-radius:999px;background:var(--color-neutral-300);overflow:hidden;margin-top:.45rem}.strength>span{display:block;height:100%;background:var(--color-accent-2)}.social-stack{display:grid;gap:.5rem;margin:var(--space-4) 0}.divider{display:grid;grid-template-columns:1fr auto 1fr;gap:.75rem;align-items:center;color:var(--color-neutral-700);font-size:.85rem;margin:var(--space-4) 0}.divider:before,.divider:after{content:"";height:1px;background:var(--color-divider)}.app-shell{min-height:100vh;display:grid;grid-template-rows:auto 1fr auto}.nav-shell,.nav-app-shell{grid-template-rows:auto auto 1fr auto}.nav-pill{position:sticky;top:0;z-index:40;padding:1.25rem var(--space-4) 0;display:flex;justify-content:center;pointer-events:none}.nav-pill-inner{pointer-events:auto;width:min(100%,1060px);min-height:3.875rem;display:flex;align-items:center;gap:1rem;flex-wrap:nowrap;padding:.625rem .75rem .625rem 1.625rem;background:var(--color-surface);border-radius:999px;box-shadow:var(--shadow-sm);box-sizing:border-box}.nav-brand{display:inline-flex;align-items:center;gap:.6rem;flex:none}.nav-brand-text{font-family:var(--font-heading);font-size:1.25rem}.nav-pill-tabs{display:none;align-items:center;gap:.25rem;margin-left:.5rem;flex-wrap:wrap;min-width:0}.nav-pill-tab{display:inline-flex;align-items:center;justify-content:center;min-height:2.25rem;padding:.55rem 1rem;border-radius:999px;border:none;background:transparent;color:var(--color-text);text-decoration:none;font-family:var(--font-body);font-weight:600;font-size:.9rem;white-space:nowrap;cursor:pointer}.nav-pill-tab.is-disabled,.nav-pill-tab:disabled{opacity:.45;cursor:not-allowed}.nav-pill-tab.is-active,.nav-pill-tab-current{background:var(--color-accent-200)}.nav-pill-end{margin-left:auto;display:flex;align-items:center;gap:.65rem;flex:none}.nav-pill-action{display:none;min-height:2.75rem;padding-inline:1.25rem}.nav-pill-menu-btn{display:inline-flex}.nav-tag-student{background:var(--color-accent-2-200);color:var(--color-accent-2-800);flex:none}.nav-tag-teacher{background:var(--color-accent-200);color:var(--color-accent);flex:none}.nav-tag-parent{background:var(--color-neutral-300);color:var(--color-neutral-900);flex:none}.nav-role-tag{cursor:default;-webkit-user-select:none;user-select:none;pointer-events:none}.nav-account{position:relative;flex:none}.nav-account-trigger{display:inline-flex;align-items:center;gap:.5rem;margin:0;padding:.2rem .65rem .2rem .2rem;border:none;border-radius:999px;background:transparent;color:inherit;font:inherit;cursor:pointer}.nav-account-trigger:hover{background:var(--color-neutral-200)}.nav-account-disc{width:2.5rem;height:2.5rem;border-radius:999px;border:none;background:var(--color-accent-2-800);color:var(--color-neutral-100);font-family:var(--font-heading);font-weight:700;font-size:1rem;display:grid;place-items:center;flex:none}.nav-account-label{font-family:var(--font-body);font-size:.95rem;font-weight:600;padding-right:.15rem}.nav-account-menu{position:absolute;right:0;top:calc(100% + .45rem);min-width:14rem;background:var(--color-neutral-100);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);padding:.5rem;z-index:50}.nav-account-meta{padding:.5rem .65rem .75rem;border-bottom:1px solid var(--color-divider);margin-bottom:.35rem}.nav-account-name{font-weight:700}.nav-account-item{display:block;width:100%;text-align:left;border:none;background:transparent;padding:.55rem .65rem;border-radius:var(--radius-sm);font:inherit;color:inherit;text-decoration:none;cursor:pointer}.nav-account-item:hover:not(:disabled){background:color-mix(in srgb,var(--color-text) 6%,transparent)}.nav-account-item:disabled{opacity:.45;cursor:not-allowed}.nav-account-item-danger{color:var(--color-accent);font-weight:600}.nav-depth-slot{width:min(100%,58rem);margin:.75rem auto 0;padding:0 var(--space-6)}.nav-mobile-backdrop,.nav-sheet-backdrop{position:fixed;inset:0;z-index:60;background:color-mix(in srgb,var(--color-neutral-900) 45%,transparent);display:flex;align-items:flex-end;justify-content:center;padding:var(--space-4)}.nav-mobile-sheet,.nav-sheet{width:min(100%,26rem);padding:var(--space-4)}.nav-mobile-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:.75rem}.nav-mobile-tabs,.nav-sheet-tabs{display:grid;gap:.35rem}.nav-mobile-tab,.nav-sheet-tab{display:block;width:100%;text-align:left;padding:.75rem .85rem;border-radius:var(--radius-sm);border:none;background:transparent;font:inherit;font-weight:600;color:inherit;text-decoration:none;cursor:pointer}.nav-mobile-tab.is-disabled,.nav-sheet-tab:disabled{opacity:.45;cursor:not-allowed}.nav-mobile-primary{width:100%;margin-top:.75rem}.nav-mobile-signout{width:100%;margin-top:.5rem;color:var(--color-accent)}.nav-depth{margin:0;font-size:.95rem}.app-footer{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:.45rem .65rem;padding:var(--space-6) var(--space-4) var(--space-8);font-size:.9rem}.app-footer-link{border:none;background:none;padding:0;font:inherit;color:inherit;text-decoration:none;cursor:pointer}.app-footer-link:disabled{opacity:.5;cursor:not-allowed}@media(min-width:720px){.nav-pill-tabs{display:flex}.nav-pill-action{display:inline-flex}.nav-pill-menu-btn{display:none}}.app-main{width:min(100%,52rem);margin:0 auto;padding:var(--space-6);display:grid;gap:var(--space-4)}.app-main.hub-main{width:min(100%,58rem);gap:var(--space-6)}.ws-rail-home-row{padding:0 .85rem .65rem}.ws-rail-home-row .nav-brand{display:inline-flex;align-items:center;gap:.45rem;font-size:1.15rem}.ws-rail-home-row .brand-mark{width:2rem;height:2rem;border-radius:.85rem;font-size:1.1rem}.brand-home-mark{display:grid;place-items:center;text-decoration:none;color:inherit}.brand-home-mark .brand-mark{width:2.5rem;height:2.5rem}.ws-rail-collapsed{flex:none;display:flex;flex-direction:column;align-items:center;gap:8px;padding-top:2px}.app-grid{display:grid;gap:var(--space-4)}@media(min-width:720px){.app-grid{grid-template-columns:1fr 1fr}}.banner{background:var(--color-accent-200);border-radius:var(--radius-md);padding:var(--space-4)}.hub-email{max-width:16rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.hub-greet h1{font-size:clamp(2rem,5vw,2.75rem);display:flex;flex-wrap:wrap;align-items:center;gap:.65rem .85rem}.hub-chip{display:inline-flex;align-items:center;padding:.25rem .75rem;border-radius:999px;background:var(--color-accent-2-200);color:var(--color-accent-2-800);font-family:var(--font-body);font-size:.8rem;font-weight:600}.hub-intro{margin:.65rem 0 0;max-width:42rem;font-size:1.05rem}.hub-entry-grid{display:grid;gap:var(--space-4)}@media(min-width:800px){.hub-entry-grid{grid-template-columns:1fr 1fr;align-items:stretch}}.hub-entry-card{display:flex;flex-direction:column;gap:.65rem;min-height:100%}.hub-entry-card h2{font-size:1.55rem;margin:0}.hub-entry-own{background:var(--color-accent-2-800);color:var(--color-neutral-100);box-shadow:var(--shadow-lg)}.hub-entry-own .muted{color:color-mix(in srgb,var(--color-neutral-100) 78%,transparent)}.hub-entry-own .btn-primary{background:var(--color-accent);color:var(--color-text)}.hub-entry-card.is-focus{outline:2px solid var(--color-accent);outline-offset:2px}.card-kicker{display:block;font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--color-neutral-700)}.hub-kicker-own{color:var(--color-accent-300)}.hub-pill-row{display:flex;flex-wrap:wrap;gap:.45rem;margin:.25rem 0 1rem}.hub-pill{display:inline-flex;padding:.3rem .7rem;border-radius:999px;background:color-mix(in srgb,var(--color-neutral-100) 14%,transparent);font-size:.8rem;font-weight:600}.hub-pill-action{border:none;font:inherit;color:inherit;cursor:pointer}.hub-pill-action:hover{background:color-mix(in srgb,var(--color-neutral-100) 28%,transparent)}.hub-pill-action:focus-visible{outline:2px solid var(--color-accent-2-200);outline-offset:2px}.hub-join-form{display:flex;flex-wrap:wrap;gap:.65rem;align-items:flex-start;margin-top:auto}.hub-waiting{display:grid;gap:var(--space-3)}.hub-section-label{font-size:.85rem;letter-spacing:.06em;text-transform:uppercase;color:var(--color-neutral-700);font-family:var(--font-body);font-weight:700}.hub-waiting-grid{display:grid;gap:var(--space-3)}@media(min-width:720px){.hub-waiting-grid{grid-template-columns:1fr 1fr}}.hub-waiting-row{background:color-mix(in srgb,var(--color-neutral-100) 70%,transparent);border-radius:var(--radius-md);padding:var(--space-4);box-shadow:var(--shadow-sm)}.hub-waiting-title{font-family:var(--font-heading);font-size:1.15rem;margin-bottom:.25rem}.hub-nudge{margin:0;font-size:.95rem}.hub-section{display:grid;gap:var(--space-3)}.hub-section-head{display:flex;flex-wrap:wrap;align-items:center;gap:.65rem}.hub-section-head h2{font-size:1.5rem}.hub-course-list{list-style:none;margin:0;padding:0;display:grid;gap:var(--space-3)}.hub-course-card{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--space-3);padding:var(--space-4)}.hub-course-title{font-family:var(--font-heading);font-size:1.25rem;margin-bottom:.35rem}.hub-text-btn{background:none;border:none;padding:0;font:inherit;font-weight:700;color:var(--color-accent-2-800);text-decoration:underline;text-underline-offset:3px;cursor:pointer}.hub-skeleton{padding:var(--space-4)}.hub-error-banner{background:#fde8e2}.hub-dialog-backdrop{position:fixed;inset:0;z-index:40;background:color-mix(in srgb,#2e2b25 45%,transparent);display:grid;place-items:center;padding:var(--space-4)}.hub-dialog{width:min(100%,35rem);max-height:calc(100vh - 2rem);overflow:auto;background:var(--color-neutral-100)}.hub-dialog-head{display:flex;align-items:flex-start;justify-content:space-between;gap:.75rem;margin-bottom:.35rem}.hub-dialog-title{font-size:1.45rem;margin:0;flex:1;min-width:0}.hub-dialog-close{flex:none;margin:-.25rem -.35rem 0 0;font-size:1.5rem;line-height:1}.hub-textarea{min-height:6rem;resize:vertical}.hub-symbol-row{display:flex;flex-wrap:wrap;gap:.35rem;margin:.75rem 0}.hub-symbol{min-width:2.25rem;min-height:2.25rem;border-radius:var(--radius-sm);border:1px solid color-mix(in srgb,var(--color-text) 18%,transparent);background:var(--color-neutral-100);font:inherit;font-weight:600;cursor:pointer}.epi-math-preview{margin:.65rem 0 .25rem;padding:.75rem 1rem;border-radius:var(--radius-sm);background:color-mix(in srgb,var(--color-neutral-100) 70%,transparent);border:1px solid color-mix(in srgb,var(--color-text) 12%,transparent);font-size:1.25rem;line-height:1.4;overflow-x:auto}.epi-math-preview .katex-display{margin:0}.hub-dialog-actions{display:flex;flex-direction:column;align-items:stretch;gap:.65rem;margin-top:1.25rem}.hub-dialog-action{width:100%;cursor:pointer}.hub-dialog-action-hint{font-size:.85rem;padding:0 .25rem;margin-top:-.25rem}.hub-toast{position:fixed;bottom:1.25rem;left:50%;transform:translate(-50%);z-index:50;display:flex;flex-wrap:wrap;align-items:center;gap:.75rem;max-width:min(36rem,calc(100% - 2rem));padding:.85rem 1rem;border-radius:var(--radius-md);background:var(--color-neutral-900);color:var(--color-neutral-100);box-shadow:var(--shadow-lg)}.hub-toast .btn-ghost{color:var(--color-neutral-100)}.tag-accent-2{background:var(--color-accent-200);color:var(--color-accent)}.hub-course-tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.5rem}.hub-resume{margin:0 0 1.5rem}.hub-resume h2{margin:0;font-size:1.25rem}.hub-resume-statement{margin:0;font-weight:600;font-size:1.05rem}.course-breadcrumb{font-size:.9rem;margin:0 0 1rem}.course-breadcrumb a{color:var(--color-accent-2-800);font-weight:600;text-decoration:none}.course-breadcrumb a:hover{text-decoration:underline}.course-hero h1{margin:0 0 .5rem;font-size:clamp(1.75rem,3vw,2.25rem)}.course-problem-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.85rem}.course-problem-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem;padding:var(--space-4)}.course-problem-statement{font-weight:600;margin-bottom:.45rem}.course-skel-line{height:1rem;border-radius:var(--radius-sm);background:color-mix(in srgb,var(--color-text) 10%,transparent);margin-bottom:.65rem;max-width:16rem}.course-skel-short{max-width:9rem}.course-skel-row{height:3.5rem;border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-text) 8%,transparent);margin:.75rem 0}.teacher-hub{display:grid;gap:var(--space-5)}.teacher-verify-banner{background:var(--color-accent-200);border:1px solid color-mix(in srgb,var(--color-accent-800) 22%,transparent)}.teacher-verify-title{font-family:var(--font-heading);font-size:1.1rem;margin-bottom:.25rem;color:var(--color-accent-900)}.teacher-verify-copy{margin:0 0 .75rem;font-size:.95rem;line-height:1.55;color:var(--color-accent-800)}.teacher-first-card,.teacher-next-card{gap:.75rem}.teacher-primary-cta{align-self:flex-start;font-size:1.05rem;padding:.9rem 1.6rem;min-height:52px}.teacher-locked-hint{margin:.35rem 0 0;font-size:.9rem}.teacher-mode-pill{background:color-mix(in srgb,var(--color-accent-2-200) 70%,transparent);color:var(--color-accent-2-800)}.teacher-setup-steps{list-style:none;margin:0;padding:0;display:grid;gap:var(--space-3)}.teacher-setup-step{display:grid;grid-template-columns:auto 1fr;gap:.85rem;align-items:start;padding:var(--space-4);border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-neutral-100) 70%,transparent);box-shadow:var(--shadow-sm)}.teacher-step-n{display:inline-grid;place-items:center;width:2rem;height:2rem;border-radius:999px;background:var(--color-accent-2-800);color:var(--color-neutral-100);font-weight:700;font-size:.9rem}.teacher-step-title{font-family:var(--font-heading);font-size:1.15rem;margin-bottom:.2rem}.teacher-setup-note{margin:0;font-size:.95rem}.teacher-preview-grid{display:grid;gap:var(--space-3)}@media(min-width:800px){.teacher-preview-grid{grid-template-columns:repeat(3,1fr)}}.teacher-course-card{align-items:flex-start}.teacher-course-link{display:block;color:inherit;text-decoration:none;width:100%}.teacher-course-link:hover .hub-course-title{color:var(--color-accent-2-800)}.teacher-next-actions{flex-wrap:wrap}.teacher-also-here{margin:0;font-size:.95rem}.teacher-reports-hint{display:block;margin-top:.35rem;font-size:.9rem}.teacher-mode-fieldset{border:none;margin:1rem 0 0;padding:0}.teacher-mode-choices{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:.45rem}.teacher-mode-choices .btn.is-selected{border-color:var(--color-accent-2-800);background:color-mix(in srgb,var(--color-accent-2-200) 55%,transparent)}.teacher-join-code{margin:0 0 1rem;padding:.9rem 1rem;border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-neutral-100) 80%,transparent);text-align:center;font-size:1.45rem;letter-spacing:.12em;font-weight:700}.teacher-join-code code{font-family:var(--font-body)}.teacher-attention-list{list-style:none;margin:0;padding:0;display:grid;gap:var(--space-2)}.teacher-hub-shell .hub-dialog-actions{flex-direction:row;flex-wrap:wrap;justify-content:flex-end}.teacher-hub-shell .hub-dialog-actions .btn{width:auto}.teacher-course{display:grid;gap:var(--space-5)}.teacher-back{margin:0;font-size:.95rem}.teacher-back a{color:var(--color-accent-2-800);text-decoration:none;font-weight:600}.teacher-back a:hover{text-decoration:underline}.teacher-course-header h1{font-family:var(--font-heading);font-size:clamp(1.75rem,3vw,2.35rem);margin:0 0 .5rem;line-height:1.15}.teacher-course-meta{margin:.5rem 0 .85rem}.teacher-join-row{display:flex;flex-wrap:wrap;align-items:center;gap:.55rem;margin-bottom:.5rem}.teacher-join-chip{display:inline-block;padding:.35rem .75rem;border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-neutral-100) 80%,transparent);font-family:var(--font-body);font-weight:700;letter-spacing:.12em;font-size:1.1rem}.teacher-course-header-actions{flex-wrap:wrap}.teacher-cta-band{gap:0}.teacher-empty-block{gap:.75rem}.teacher-empty-block h3{margin:0;font-family:var(--font-heading);font-size:1.25rem}.teacher-problem-list,.teacher-student-list{list-style:none;margin:0;padding:0;display:grid;gap:var(--space-3)}.teacher-problem-row,.teacher-student-row{display:grid;grid-template-columns:auto 1fr auto;gap:.85rem;align-items:start}@media(max-width:640px){.teacher-problem-row,.teacher-student-row{grid-template-columns:auto 1fr}.teacher-row-actions{grid-column:1 / -1;justify-content:flex-start}}.teacher-problem-n{display:inline-grid;place-items:center;width:2rem;height:2rem;border-radius:999px;background:var(--color-accent-2-800);color:var(--color-neutral-100);font-weight:700;font-size:.9rem}.teacher-problem-statement{font-weight:600;line-height:1.45}.teacher-problem-answer{margin:.35rem 0 .5rem;font-size:.95rem}.teacher-row-actions{display:flex;flex-wrap:wrap;gap:.25rem}.teacher-student-initials{display:inline-grid;place-items:center;width:2.4rem;height:2.4rem;border-radius:999px;background:color-mix(in srgb,var(--color-accent-200) 80%,transparent);color:var(--color-accent-900);font-weight:700;font-size:.85rem}.teacher-student-name{font-weight:600}.teacher-student-row .btn{align-self:center}.teacher-course-skeleton{display:grid;gap:.5rem}.tag-outline{background:transparent;border:1px solid color-mix(in srgb,var(--color-text) 22%,transparent)}.ws-shell{height:100vh;box-sizing:border-box;display:flex;gap:14px;padding:14px;background:var(--color-bg);color:var(--color-text)}.ws-rail{width:274px;flex:none;background:var(--color-surface);border-radius:calc(var(--radius-lg) * 1.15);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;overflow:hidden}.ws-rail-top{padding:16px 16px 10px;display:flex;gap:8px;align-items:center}.ws-new-btn{flex:1;min-height:46px;font-size:15px}.btn-icon{flex:none;width:44px;height:44px;min-height:44px;padding:0;border-radius:999px}.ws-rail-kicker{padding:12px 20px 8px}.ws-rail-list{flex:1;overflow-y:auto;padding:0 10px 10px;display:flex;flex-direction:column;gap:4px}.ws-rail-msg{margin:.5rem .75rem;font-size:.9rem}.ws-rail-item{text-align:left;width:100%;box-sizing:border-box;border:none;background:transparent;font-family:var(--font-body);cursor:pointer;padding:12px 14px;border-radius:var(--radius-lg);display:flex;gap:11px;align-items:flex-start;position:relative;color:inherit}.ws-rail-item:hover{background:var(--color-neutral-200)}.ws-rail-item.is-active{background:var(--color-accent-2-200)}.ws-rail-item-icon{flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;margin-top:1px;font-weight:700}.ws-rail-item-body{min-width:0;flex:1}.ws-rail-item-title{display:block;font-size:14.5px;font-weight:600;line-height:1.35;max-height:2.7em;overflow:hidden}.ws-rail-item-title .katex{font-size:1.05em;text-align:left}.ws-rail-item-title .katex-html{white-space:nowrap}.ws-rail-item-status{display:block;font-size:12.5px;margin-top:2px}.ws-rail-footer{border-top:1px solid var(--color-divider);padding:12px 16px;display:flex;align-items:center;gap:10px}.ws-avatar{flex:none;width:32px;height:32px;border-radius:50%;background:var(--color-accent-2);color:var(--color-neutral-100);display:grid;place-items:center;font-family:var(--font-heading);font-size:15px}.ws-rail-name{font-size:14px;font-weight:600;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ws-center{flex:1;min-width:0;display:flex;flex-direction:column}.ws-center-card{flex:1;background:var(--color-neutral-100);border-radius:calc(var(--radius-lg) * 1.15);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;min-height:0;overflow:hidden}.ws-center-head{display:flex;align-items:flex-start;gap:12px;padding:14px 22px 12px;border-bottom:1px solid var(--color-divider)}.ws-problem-title{font-family:Georgia,Times New Roman,serif;font-size:clamp(1.5rem,3vw,2.25rem);font-weight:400;margin:.25rem 0 0;line-height:1.25;overflow-x:auto}.ws-problem-title .katex-display{margin:.15em 0}.ws-problem-title .katex{font-size:1.15em;text-align:left}.ws-coach{padding:16px 22px 0;margin:0;font-size:.95rem}.ws-composer-stub{margin-top:auto;padding:16px 22px 20px;font-size:.9rem;border-top:1px dashed var(--color-divider)}.ws-center-scroll{flex:1;min-height:0;overflow-y:auto;padding:8px 22px 0}.ws-timeline{list-style:none;margin:0;padding:0 0 12px;display:flex;flex-direction:column;gap:10px}.ws-timeline-item{display:flex;gap:12px;align-items:flex-start}.ws-timeline-n{flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:700}.ws-timeline-body{min-width:0;flex:1}.ws-timeline-tex{font-size:1.15rem;overflow-x:auto}.ws-timeline-tag{display:inline-block;margin-top:4px;font-size:12.5px;font-weight:600}.ws-composer{margin-top:auto;padding:12px 16px 16px;border-top:1px solid var(--color-divider);display:flex;flex-direction:column;gap:8px}.ws-composer-input{min-height:3.5rem;resize:vertical;font-family:Georgia,Times New Roman,serif;font-size:1.1rem}.ws-composer-preview{margin:0}.ws-composer-bar{display:flex;align-items:center;justify-content:space-between;gap:12px}.ws-feedback-list{display:flex;flex-direction:column;gap:10px}.ws-feedback-card{border:1px solid var(--color-divider);border-radius:calc(var(--radius-lg) * .85);background:var(--color-neutral-100);overflow:hidden}.ws-feedback-head{width:100%;display:flex;align-items:center;gap:10px;padding:12px 14px 8px;border:none;background:transparent;font:inherit;cursor:pointer;text-align:left;color:inherit}.ws-feedback-dot{width:8px;height:8px;border-radius:50%;flex:none}.ws-feedback-title{flex:1;font-size:13.5px;font-weight:500}.ws-feedback-body{padding:0 14px 12px 32px}.ws-persist-error{margin-top:12px;padding:10px 12px;border-radius:var(--radius-sm);background:color-mix(in srgb,var(--color-accent) 14%,transparent)}.ws-tools{width:100%;flex:1;min-height:0;background:var(--color-surface);border-radius:calc(var(--radius-lg) * 1.15);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;overflow:hidden}.ws-right{width:min(320px,32vw);flex:none;display:flex;flex-direction:column;gap:10px;min-height:0;align-self:stretch}.ws-right-profile{flex:none;display:flex;justify-content:flex-end;align-items:center;min-height:2.75rem}.ws-right-profile .nav-account-trigger{background:var(--color-surface);box-shadow:var(--shadow-sm)}.ws-right-profile .nav-account-trigger:hover{background:var(--color-neutral-100)}.ws-right-profile .nav-account-menu{z-index:60}.ws-tools-tabs{display:flex;gap:4px;padding:12px 12px 0;flex-wrap:wrap}.ws-tab{border:none;background:transparent;font:inherit;font-weight:600;font-size:13px;padding:8px 12px;border-radius:999px;cursor:pointer;color:var(--color-neutral-700)}.ws-tab.is-active{background:var(--color-neutral-100);color:var(--color-text)}.ws-tab:disabled{opacity:.45;cursor:not-allowed}.ws-tools-body{flex:1;min-height:0;display:flex;flex-direction:column;padding:16px;gap:12px}.ws-ai-scroll{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain}.ws-tools-footer{flex:none;padding-top:4px;border-top:1px solid var(--color-divider)}.ep-scroll{scrollbar-width:thin}@media(max-width:900px){.ws-shell{flex-direction:column;height:auto;min-height:100vh}.ws-rail,.ws-right,.ws-tools{width:100%}.ws-center{min-height:50vh}}