@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{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,math,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.19.0"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.katex-newline{display:block}.katex .katex-base{white-space:nowrap;width:min-content;position:relative}.katex .katex-base,.katex .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;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .katex-vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .katex-thinbox{flex-direction:row;width:0;max-width:0;display:inline-flex}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline,.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-rule,.katex .katex-underline .underline-line,.katex .mfrac .frac-line{min-height:1px}.katex .mspace{display:inline-block}.katex .katex-smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.katex-inner,.katex .llap>.katex-inner,.katex .rlap>.katex-inner{position:absolute}.katex .clap>.katex-fix,.katex .llap>.katex-fix,.katex .rlap>.katex-fix{display:inline-block}.katex .llap>.katex-inner{right:0}.katex .clap>.katex-inner,.katex .rlap>.katex-inner{left:0}.katex .clap>.katex-inner>span{margin-left:-50%;margin-right:50%}.katex .katex-rule{border:0 solid;display:inline-block;position:relative}.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.katex-root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .katex-sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .katex-sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .katex-sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .katex-sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .katex-sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .katex-sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .katex-sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .katex-sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .katex-sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .katex-sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .katex-sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .katex-sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .katex-sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .katex-sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .katex-sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .katex-sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .katex-sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .katex-sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .katex-sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .katex-sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .katex-sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .katex-sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .katex-sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .katex-sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .katex-sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .katex-sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .katex-sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .katex-sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .katex-sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .katex-sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .katex-sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .katex-sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .katex-sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .katex-sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .katex-sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .katex-sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .katex-sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .katex-sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .katex-sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .katex-sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .katex-sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .katex-sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .katex-sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .katex-sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .katex-sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .katex-sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .katex-sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .katex-sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .katex-sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .katex-sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .katex-sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .katex-sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .katex-sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .katex-sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .katex-sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .katex-sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .katex-sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .katex-sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .katex-sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .katex-sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .katex-sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .katex-sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .katex-sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .katex-sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .katex-sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .katex-sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .katex-sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .katex-sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .katex-sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .katex-sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .katex-sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .katex-sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .katex-sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .katex-sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .katex-sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .katex-sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .katex-sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .katex-sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .katex-sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .katex-sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .katex-sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .katex-sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .katex-sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .katex-sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .katex-sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .katex-sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .katex-sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .katex-sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .katex-sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .katex-sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .katex-sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .katex-sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .katex-sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .katex-sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .katex-sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .katex-sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .katex-sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .katex-sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .katex-sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .katex-sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .katex-sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .katex-sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .katex-sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .katex-sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .katex-sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .katex-sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .katex-sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .katex-sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .katex-sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .katex-sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .katex-sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .katex-sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .katex-sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .katex-sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .katex-sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .katex-sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .katex-sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .katex-sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .katex-sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .katex-sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .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{width:.12em;display:inline-block}.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 .katex-accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .katex-accent .accent-body{position:relative}.katex .katex-accent .accent-body:not(.accent-full){width:0}.katex .katex-overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.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;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .katex-stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .katex-stretchy:after,.katex .katex-stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.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{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .katex-sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .reflectbox{display:inline-block;transform:scaleX(-1)}.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{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.katex-tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.katex-tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}:root{--bg:#f4f6fb;--surface:#fff;--surface-2:#f0f3f9;--surface-3:#e5eaf3;--border:#dde3ee;--text:#0f1b2d;--text-2:#3b4a63;--muted:#6a7891;--primary:#1f5eff;--primary-2:#1546c7;--primary-soft:#e6eeff;--navy:#0b2a5b;--accent:#f5a400;--accent-soft:#fff4dc;--ok:#12a150;--ok-soft:#e3f7ec;--bad:#e5484d;--bad-soft:#fdecec;--warn:#d97706;--warn-soft:#fff3e0;--violet:#7c4dff;--violet-soft:#efe9ff;--shadow:0 1px 2px #0f1b2d0d, 0 4px 16px #0f1b2d0f;--shadow-lg:0 10px 40px #0f1b2d29;--radius:14px;--radius-sm:9px;--sidebar:264px;--font:"Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--mono:"JetBrains Mono", ui-monospace, Consolas, monospace;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0a1220;--surface:#111b2e;--surface-2:#16223a;--surface-3:#1e2c48;--border:#22314f;--text:#e8eef9;--text-2:#c2cde0;--muted:#8796b0;--primary:#5b8cff;--primary-2:#7aa2ff;--primary-soft:#18284a;--accent:#fb3;--accent-soft:#33280f;--ok:#34c77b;--ok-soft:#11301f;--bad:#ff6b6f;--bad-soft:#3a1618;--warn:#f5a524;--warn-soft:#36260b;--violet:#a68bff;--violet-soft:#251c45;--shadow:0 1px 2px #0000004d, 0 4px 16px #00000040;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--bg:#0a1220;--surface:#111b2e;--surface-2:#16223a;--surface-3:#1e2c48;--border:#22314f;--text:#e8eef9;--text-2:#c2cde0;--muted:#8796b0;--primary:#5b8cff;--primary-2:#7aa2ff;--primary-soft:#18284a;--accent:#fb3;--accent-soft:#33280f;--ok:#34c77b;--ok-soft:#11301f;--bad:#ff6b6f;--bad-soft:#3a1618;--warn:#f5a524;--warn-soft:#36260b;--violet:#a68bff;--violet-soft:#251c45;--shadow:0 1px 2px #0000004d, 0 4px 16px #00000040;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:80px}body{background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;margin:0;font-size:15px;line-height:1.55}h1,h2,h3,h4{letter-spacing:-.01em;margin:0 0 .4em;line-height:1.25}h1{font-size:clamp(1.5rem,2.6vw,2rem);font-weight:800}h2{font-size:1.2rem;font-weight:700}h3{font-size:1.05rem;font-weight:700}p{margin:0 0 .8em}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}code{font-family:var(--mono);background:var(--surface-2);border-radius:5px;padding:.1em .35em;font-size:.88em}hr{border:0;border-top:1px solid var(--border);margin:12px 0}mark{background:var(--accent-soft);color:inherit;border-radius:3px;padding:0 2px}button,input,select,textarea{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.muted{color:var(--muted)}.center{justify-content:center;margin-top:16px;display:flex}.icon{flex-shrink:0}.rot-90{transform:rotate(-90deg)}.app{min-height:100vh}.topbar{z-index:20;margin-left:var(--sidebar);background:color-mix(in srgb, var(--bg) 85%, transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);align-items:center;gap:12px;height:64px;padding:0 28px;display:flex;position:sticky;top:0}.sidebar{width:var(--sidebar);z-index:40;background:var(--navy);color:#dbe5ff;flex-direction:column;padding:18px 14px;display:flex;position:fixed;inset:0 auto 0 0}.sidebar-head{justify-content:space-between;align-items:center;padding:4px 8px 20px;display:flex}.sidebar nav{flex-direction:column;flex:1;gap:2px;display:flex;overflow-y:auto}.nav-link{color:#b8c7e8;border-radius:10px;align-items:center;gap:12px;padding:10px 12px;font-weight:500;display:flex}.nav-link:hover{color:#fff;background:#ffffff12;text-decoration:none}.nav-link.active{color:#fff;box-shadow:inset 3px 0 0 var(--accent);background:#5b8cff38}.nav-section{text-transform:uppercase;letter-spacing:.08em;color:#7f93bd;align-items:center;gap:6px;margin:18px 12px 6px;font-size:.72rem;display:flex}.sidebar-foot{border-top:1px solid #ffffff1a;justify-content:space-between;align-items:center;gap:8px;padding:12px 8px 0;display:flex}.sidebar-foot .icon-btn{color:#b8c7e8}.me{align-items:center;gap:10px;min-width:0;display:flex}.me strong{color:#fff;white-space:nowrap;text-overflow:ellipsis;max-width:150px;font-size:.9rem;display:block;overflow:hidden}.me small{color:#8ea2cc}.avatar{background:linear-gradient(135deg, var(--accent), #ff7a00);color:#1b1200;border-radius:50%;flex-shrink:0;place-items:center;width:36px;height:36px;font-weight:800;display:grid}.avatar.sm{width:30px;height:30px;font-size:.85rem}.brand{color:inherit;align-items:center;gap:10px;font-size:1.05rem;display:inline-flex}.brand strong{font-weight:800}.brand small{letter-spacing:.1em;text-transform:uppercase;opacity:.65;font-size:.68rem;line-height:1;display:block}.sidebar .brand{color:#fff}.main{margin-left:var(--sidebar);min-width:0;padding:28px}.page{flex-direction:column;gap:20px;max-width:1180px;margin:0 auto;display:flex}.page.narrow{max-width:820px}.page.wide{max-width:1500px}.page-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;display:flex}.page-head h1{margin:0}.page-head p{margin:4px 0 0}.eyebrow{text-transform:uppercase;letter-spacing:.08em;color:var(--primary);align-items:center;gap:6px;margin:0 0 6px;font-size:.78rem;font-weight:700;display:inline-flex}.back-link{color:var(--muted);align-self:flex-start;align-items:center;gap:6px;font-size:.9rem;font-weight:500;display:inline-flex}.scrim{z-index:35;background:#050c1980;position:fixed;inset:0}.only-mobile{display:none!important}.search{background:var(--surface);border:1px solid var(--border);max-width:460px;color:var(--muted);border-radius:999px;flex:1;align-items:center;gap:8px;padding:0 14px;display:flex}.search input{min-width:0;height:38px;color:var(--text);background:0 0;border:0;outline:0;flex:1}.search.inline{border-radius:var(--radius-sm);max-width:340px}.topbar .search{margin-right:auto}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.card-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.card-head h2,.card-head h3{margin:0}.btn{border:1px solid var(--border);background:var(--surface);height:40px;color:var(--text);cursor:pointer;white-space:nowrap;border-radius:10px;justify-content:center;align-items:center;gap:8px;padding:0 16px;font-weight:600;transition:background .15s,border-color .15s,transform 50ms;display:inline-flex;text-decoration:none!important}.btn:hover{background:var(--surface-2)}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-2)}.btn-accent{background:var(--accent);border-color:var(--accent);color:#241700}.btn-accent:hover{background:color-mix(in srgb, var(--accent) 88%, #000)}.btn-violet{background:var(--violet);border-color:var(--violet);color:#fff}.btn-violet:hover{background:color-mix(in srgb, var(--violet) 88%, #000)}.btn-danger{color:var(--bad);border-color:color-mix(in srgb, var(--bad) 40%, var(--border))}.btn-danger:hover{background:var(--bad-soft)}.btn-ghost{background:0 0;border-color:#0000}.btn-sm{border-radius:8px;height:32px;padding:0 10px;font-size:.85rem}.btn-lg{height:48px;padding:0 22px;font-size:1rem}.btn-block{width:100%}.icon-btn{width:36px;height:36px;color:var(--text-2);cursor:pointer;background:0 0;border:0;border-radius:9px;place-items:center;display:inline-grid}.icon-btn:hover{background:var(--surface-2)}.icon-btn.danger:hover{color:var(--bad);background:var(--bad-soft)}.icon-btn:disabled{opacity:.35;cursor:not-allowed}.icon-btn.flagged{color:var(--accent)}.link{align-items:center;gap:4px;font-weight:600;display:inline-flex}.link-btn{cursor:pointer;background:0 0;border:0;padding:0}.pill{background:var(--surface-3);color:var(--text-2);white-space:nowrap;border-radius:999px;align-items:center;gap:4px;padding:2px 9px;font-size:.78rem;font-weight:600;display:inline-flex}.pill-ok{background:var(--ok-soft);color:var(--ok)}.pill-bad{background:var(--bad-soft);color:var(--bad)}.pill-warn{background:var(--warn-soft);color:var(--warn)}.pill-violet{background:var(--violet-soft);color:var(--violet)}.hero-actions{flex-wrap:wrap;gap:10px;margin-top:14px;display:flex}.loader{color:var(--muted);justify-content:center;align-items:center;gap:10px;padding:60px 0;display:flex}.spinner{border:2.5px solid var(--surface-3);border-top-color:var(--primary);border-radius:50%;width:20px;height:20px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.error-box{border-radius:var(--radius-sm);background:var(--bad-soft);color:var(--bad);align-items:center;gap:10px;padding:14px 16px;font-weight:500;display:flex}.empty{text-align:center;color:var(--muted);flex-direction:column;align-items:center;gap:8px;padding:48px 20px;display:flex}.empty strong{color:var(--text);font-size:1.05rem}.ring{flex-shrink:0;place-items:center;display:inline-grid;position:relative}.ring svg{position:absolute;inset:0}.ring-track{stroke:var(--surface-3)}.ring-value{stroke:var(--primary);transition:stroke-dashoffset .6s}.ring-label{font-weight:800;position:relative}.bar{background:var(--surface-3);border-radius:99px;width:100%;height:8px;overflow:hidden}.bar-thin{height:5px}.bar-fill{border-radius:inherit;background:var(--primary);height:100%;transition:width .5s}.bar-fill.tone-violet{background:var(--violet)}.bar-fill.tone-ok{background:var(--ok)}.stats-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;display:grid}.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);align-items:center;gap:14px;padding:16px;display:flex}.stat-icon{background:var(--primary-soft);width:44px;height:44px;color:var(--primary);border-radius:12px;place-items:center;display:grid}.stat.tone-accent .stat-icon{background:var(--accent-soft);color:var(--warn)}.stat.tone-ok .stat-icon{background:var(--ok-soft);color:var(--ok)}.stat.tone-violet .stat-icon{background:var(--violet-soft);color:var(--violet)}.stat-value{font-size:1.35rem;font-weight:800;line-height:1.1}.stat-label{color:var(--muted);font-size:.85rem}.stat-sub{color:var(--text-2);font-size:.78rem}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.activity{align-items:flex-end;gap:3px;height:120px;display:flex}.activity-col{background:var(--surface-2);border-radius:4px;flex:1;align-items:flex-end;height:100%;display:flex}.activity-bar{background:linear-gradient(to top, var(--primary), var(--violet));border-radius:4px;width:100%;min-height:0}.hero{background:radial-gradient(circle at 100% 0%, var(--primary-soft), transparent 55%), var(--surface);justify-content:space-between;align-items:center;gap:24px;padding:28px;display:flex}.hero h1,.hero h2{margin-bottom:6px}.licence-list{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.list{flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.list-link{border-bottom:1px solid var(--border);color:var(--text);justify-content:space-between;align-items:center;gap:12px;padding:10px 4px;display:flex}.list li:last-child .list-link,.list li.list-link:last-child{border-bottom:0}.list-link:hover{color:var(--primary);text-decoration:none}.module-progress-list{flex-direction:column;display:flex}.module-progress{border-bottom:1px solid var(--border);color:var(--text);grid-template-columns:40px minmax(0,1fr) 180px 48px;align-items:center;gap:14px;padding:10px 4px;display:grid}.module-progress:last-child{border-bottom:0}a.module-progress:hover{background:var(--surface-2);border-radius:8px;text-decoration:none}.module-progress-title{white-space:nowrap;text-overflow:ellipsis;font-weight:500;overflow:hidden}.module-progress-pct{text-align:right;font-size:.9rem;font-weight:700}.module-num{background:var(--primary-soft);width:36px;height:36px;color:var(--primary);border-radius:10px;flex-shrink:0;place-items:center;font-weight:800;display:grid}.table-wrap{-webkit-overflow-scrolling:touch;overflow-x:auto}.table{border-collapse:collapse;width:100%;font-size:.92rem}.table th{text-align:left;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);border-bottom:1px solid var(--border);white-space:nowrap;padding:8px 10px;font-size:.75rem;font-weight:600}.table td{border-bottom:1px solid var(--border);vertical-align:middle;padding:10px}.table tr:last-child td{border-bottom:0}.row-actions{justify-content:flex-end;gap:2px;display:flex}.user-cell{color:var(--text);align-items:center;gap:10px;display:flex}.user-cell small{display:block}.segmented{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:3px;display:inline-flex}.segmented button{cursor:pointer;color:var(--muted);background:0 0;border:0;border-radius:8px;padding:6px 14px;font-weight:600}.segmented button.active{background:var(--surface);color:var(--text);box-shadow:var(--shadow)}.tabs{border-bottom:1px solid var(--border);gap:4px;display:flex}.tabs button{color:var(--muted);cursor:pointer;background:0 0;border:0;border-bottom:2px solid #0000;margin-bottom:-1px;padding:10px 16px;font-weight:600}.tabs button.active{color:var(--primary);border-bottom-color:var(--primary)}.count{background:var(--surface-3);border-radius:99px;margin-left:4px;padding:0 7px;font-size:.75rem}.toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;display:flex}.toolbar select{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);height:40px;padding:0 10px}.form-stack{flex-direction:column;gap:14px;display:flex}.form-stack h2{margin:0}.form-row{flex-wrap:wrap;gap:14px;display:flex}.form-row>.field{flex:1;min-width:180px}.form-grid{grid-template-columns:2fr 1fr auto;align-items:end;gap:14px;display:grid}.field{flex-direction:column;gap:6px;display:flex}.field>span{color:var(--text-2);font-size:.85rem;font-weight:600}.field input,.field select,.field textarea,.choice-edit input:not([type=radio]){border:1px solid var(--border);background:var(--surface);border-radius:var(--radius-sm);outline:none;width:100%;padding:9px 12px;transition:border-color .15s,box-shadow .15s}.field input:focus,.field select:focus,.field textarea:focus,.choice-edit input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}.field input:disabled{background:var(--surface-2)}.field textarea{resize:vertical}.check{cursor:pointer;align-items:center;gap:8px;font-weight:500;display:inline-flex}.form-error{background:var(--bad-soft);color:var(--bad);border-radius:var(--radius-sm);padding:10px 12px;font-weight:500}.form-msg{margin:0;font-weight:600}.form-msg.ok{color:var(--ok)}.form-msg.bad{color:var(--bad)}.danger-zone{border-color:color-mix(in srgb, var(--bad) 30%, var(--border))}.chips{flex-wrap:wrap;gap:6px;display:flex}.chip{border:1px solid var(--border);background:var(--surface);cursor:pointer;border-radius:99px;padding:4px 12px;font-size:.85rem;font-weight:600}.chip.on{background:var(--primary);border-color:var(--primary);color:#fff}.choice-edit{align-items:center;gap:8px;display:flex}.modal-backdrop{z-index:100;background:#050c198c;place-items:center;padding:16px;animation:.15s fade;display:grid;position:fixed;inset:0}.modal{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-lg);flex-direction:column;width:min(560px,100%);max-height:calc(100vh - 32px);display:flex}.modal-wide{width:min(820px,100%)}.modal-head{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.modal-head h3{margin:0}.modal-body{padding:20px;overflow-y:auto}@keyframes fade{0%{opacity:0}}.auth-page{grid-template-columns:1.1fr 1fr;min-height:100vh;display:grid}.auth-hero{color:#e3ebff;background:radial-gradient(circle at 20% 10%,#1f4fa8 0%,#0000 50%),linear-gradient(160deg,#0b2a5b,#061733);flex-direction:column;justify-content:center;gap:24px;padding:48px clamp(24px,5vw,72px);display:flex;position:relative;overflow:hidden}.auth-hero .brand{color:#fff;position:absolute;top:32px;left:clamp(24px,5vw,72px)}.auth-hero h1{color:#fff;max-width:560px;font-size:clamp(1.8rem,3.4vw,2.8rem)}.auth-hero ul{flex-direction:column;gap:14px;max-width:520px;margin:0;padding:0;list-style:none;display:flex}.auth-hero li{align-items:center;gap:12px;font-size:1.02rem;display:flex}.auth-hero li .icon{color:var(--accent)}.auth-plane{color:#ffc84a;opacity:.8;width:100%;position:absolute;bottom:30px;left:0}.auth-panel{place-items:center;padding:32px 16px;display:grid}.auth-card{flex-direction:column;gap:14px;width:min(420px,100%);padding:32px;display:flex}.auth-card h2{margin:0;font-size:1.6rem}.auth-card>p{margin:-8px 0 4px}.auth-switch{text-align:center;color:var(--muted);margin:0}.module-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px;display:grid}.module-card{color:var(--text);flex-direction:column;gap:8px;transition:transform .15s,box-shadow .15s,border-color .15s;display:flex}.module-card:hover{box-shadow:var(--shadow-lg);border-color:color-mix(in srgb, var(--primary) 40%, var(--border));text-decoration:none;transform:translateY(-2px)}.module-card h3{margin:4px 0 0}.module-card p{flex:1;margin:0;font-size:.9rem}.module-card-top{justify-content:space-between;align-items:center;display:flex}.module-icon{background:linear-gradient(135deg, var(--primary), var(--violet));color:#fff;border-radius:13px;place-items:center;width:48px;height:48px;display:grid}.module-badge{color:var(--primary);background:var(--primary-soft);border-radius:99px;padding:3px 10px;font-size:.8rem;font-weight:800}.module-meta{color:var(--muted);flex-wrap:wrap;gap:12px;margin:4px 0;font-size:.8rem;display:flex}.clamp-2,.clamp-3{-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.clamp-2{-webkit-line-clamp:2}.clamp-3{-webkit-line-clamp:3}.module-hero .eyebrow .icon{color:var(--primary)}.exam-history{flex-wrap:wrap;gap:10px;display:flex}.exam-chip{border-radius:10px;flex-direction:column;padding:8px 14px;font-size:.8rem;display:flex}.exam-chip strong{font-size:1.15rem}.exam-chip.ok{background:var(--ok-soft);color:var(--ok)}.exam-chip.bad{background:var(--bad-soft);color:var(--bad)}.sub-list{flex-direction:column;gap:10px;display:flex}.sub-row{align-items:center;gap:18px;padding:14px 18px;display:flex}.sub-main{color:var(--text);flex:1;align-items:flex-start;gap:14px;min-width:0;display:flex}.sub-main:hover{text-decoration:none}.sub-main:hover .sub-title{color:var(--primary)}.sub-id{background:var(--surface-2);min-width:52px;height:40px;color:var(--text-2);border-radius:10px;place-items:center;padding:0 6px;font-size:.85rem;font-weight:800;display:grid}.sub-id.done{background:var(--ok-soft);color:var(--ok)}.sub-text{flex-direction:column;gap:2px;min-width:0;display:flex}.sub-title{font-weight:650}.sub-text .muted{font-size:.88rem}.sub-meta{color:var(--muted);flex-wrap:wrap;gap:14px;margin-top:4px;font-size:.8rem;display:flex}.sub-meta span{align-items:center;gap:4px;display:inline-flex}.sub-side{flex-direction:column;flex-shrink:0;gap:10px;width:230px;display:flex}.sub-actions{justify-content:flex-end;gap:6px;display:flex}.course-page{max-width:1280px}.course-layout{grid-template-columns:minmax(0,1fr) 260px;align-items:start;gap:36px;display:grid}.course{flex-direction:column;gap:18px;min-width:0;display:flex}.course-head h1{font-size:clamp(1.7rem,3vw,2.4rem)}.lead{color:var(--text-2);font-size:1.08rem}.toc{position:sticky;top:84px}.toc-inner{border-left:1px solid var(--border);max-height:calc(100vh - 110px);padding:16px;overflow-y:auto}.toc-inner>strong{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-size:.75rem}.toc-list{margin:10px 0 0;padding:0;font-size:.87rem;list-style:none}.toc-list li a{color:var(--text-2);border-radius:6px;padding:5px 8px;line-height:1.35;display:block}.toc-list li a:hover{background:var(--surface-2);text-decoration:none}.toc-list li.toc-d3 a{color:var(--muted);padding-left:22px;font-size:.83rem}.toc-list li.active a{color:var(--primary);background:var(--primary-soft);font-weight:600}.toc-actions{margin-top:16px}.toc-mobile{padding:12px 16px;display:none}.toc-mobile summary{cursor:pointer;align-items:center;gap:8px;font-weight:600;display:flex}.course-end{background:linear-gradient(135deg, var(--primary-soft), var(--violet-soft));flex-wrap:wrap;justify-content:space-between;align-items:center;gap:18px;display:flex}.course-end h3{margin:0 0 4px}.course-end p,.course-end .hero-actions{margin:0}.pager{justify-content:space-between;gap:14px;display:flex}.pager-link{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);align-items:center;gap:10px;max-width:48%;padding:12px 16px;display:flex}.pager-link small{color:var(--muted);display:block}.pager-link.next{text-align:right;margin-left:auto}.pager-link:hover{border-color:var(--primary);text-decoration:none}.md{overflow-wrap:break-word}.md-inline>p:only-child{margin:0}.md>:last-child{margin-bottom:0}.course-body{color:var(--text);font-size:1.02rem;line-height:1.75}.course-body h2{border-bottom:2px solid var(--border);margin:2.2em 0 .6em;padding-bottom:.35em;font-size:1.5rem}.course-body h2:first-child{margin-top:.5em}.course-body h3{color:var(--primary);margin:1.8em 0 .5em;font-size:1.18rem}.course-body h4{margin:1.4em 0 .4em;font-size:1.02rem}.course-body ul,.course-body ol{margin:0 0 1em;padding-left:1.4em}.course-body li{margin:.25em 0}.course-body li::marker{color:var(--primary)}.course-body strong{font-weight:700}.md table{border-collapse:collapse;width:100%;margin:.4em 0 1.2em;font-size:.93rem}.md th{background:var(--surface-2);text-align:left;font-weight:700}.md th,.md td{border:1px solid var(--border);vertical-align:top;padding:8px 12px}.md tr:nth-child(2n) td{background:color-mix(in srgb, var(--surface-2) 45%, transparent)}.md pre{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;font-size:.88rem;overflow-x:auto}.md pre code{background:0 0;padding:0}.md blockquote{border-left:4px solid var(--border);color:var(--text-2);margin:1em 0;padding:4px 16px}.md img{border-radius:var(--radius-sm);max-width:100%}.md figure{text-align:center;margin:1.4em 0}.md figure svg{max-width:100%;height:auto}.md figcaption{color:var(--muted);margin-top:8px;font-size:.85rem;font-style:italic}.md .diagram{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px}.md .katex-display{padding:8px 0;overflow:auto hidden}.mermaid-diagram{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);justify-content:center;margin:1.2em 0;padding:16px;display:flex;overflow-x:auto}.mermaid-diagram svg{max-width:100%;height:auto}.mermaid-error{color:var(--bad);white-space:pre-wrap}.callout{border-radius:var(--radius-sm);--c:var(--primary);--cs:var(--primary-soft);border:1px solid;border-left-width:4px;border-color:color-mix(in srgb, var(--c) 30%, transparent);border-left-color:var(--c);background:var(--cs);margin:1.3em 0;padding:14px 18px;position:relative}.callout:before{content:attr(data-label);text-transform:uppercase;letter-spacing:.07em;color:var(--c);margin-bottom:4px;font-size:.78rem;font-weight:800;display:block}.callout>:last-child{margin-bottom:0}.callout-tip{--c:var(--ok);--cs:var(--ok-soft)}.callout-warning,.callout-safety{--c:var(--bad);--cs:var(--bad-soft)}.callout-exam{--c:var(--violet);--cs:var(--violet-soft)}.callout-example{--c:var(--warn);--cs:var(--warn-soft)}.callout-definition{--c:var(--text-2);--cs:var(--surface-2)}.callout-formula{--c:var(--primary);--cs:var(--surface-2)}.quiz-page{max-width:860px}.quiz-top{justify-content:space-between;align-items:flex-end;gap:12px;display:flex}.quiz-top .eyebrow{margin-bottom:2px}.quiz-top-right{align-items:center;gap:10px;display:flex}.timer{font-family:var(--mono);background:var(--surface);border:1px solid var(--border);border-radius:8px;align-items:center;gap:6px;padding:4px 10px;font-weight:600;display:inline-flex}.timer.urgent{color:var(--bad);border-color:var(--bad);animation:1s infinite pulse}@keyframes pulse{50%{opacity:.6}}.question-card{padding:28px}.question-meta{justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;font-size:.82rem;display:flex}.difficulty{color:var(--accent);letter-spacing:2px;margin-left:auto}.question-text{margin-bottom:18px;font-size:1.12rem;font-weight:600;line-height:1.55}.choices{flex-direction:column;gap:10px;display:flex}.choice{text-align:left;border:1.5px solid var(--border);background:var(--surface);cursor:pointer;border-radius:12px;align-items:center;gap:14px;width:100%;padding:14px 16px;transition:border-color .12s,background .12s;display:flex}.choice:hover:not(:disabled){border-color:var(--primary);background:var(--primary-soft)}.choice:disabled{cursor:default}.choice .md{flex:1}.choice-letter{background:var(--surface-2);border-radius:8px;flex-shrink:0;place-items:center;width:30px;height:30px;font-size:.85rem;font-weight:800;display:grid}.choice.selected{border-color:var(--primary);background:var(--primary-soft)}.choice.selected .choice-letter{background:var(--primary);color:#fff}.choice.correct{border-color:var(--ok);background:var(--ok-soft)}.choice.correct .choice-letter{background:var(--ok);color:#fff}.choice.wrong{border-color:var(--bad);background:var(--bad-soft)}.choice.wrong .choice-letter{background:var(--bad);color:#fff}.choice.dim{opacity:.55}.choice-mark{margin-left:auto}.choice.correct .choice-mark{color:var(--ok)}.choice.wrong .choice-mark{color:var(--bad)}.explanation{border-left:4px solid;border-radius:12px;margin-top:18px;padding:14px 18px;animation:.2s fade}.explanation>strong{margin-bottom:4px;display:block}.explanation.ok{background:var(--ok-soft);border-color:var(--ok)}.explanation.ok>strong{color:var(--ok)}.explanation.bad{background:var(--bad-soft);border-color:var(--bad)}.explanation.bad>strong{color:var(--bad)}.explanation.neutral{background:var(--surface-2);border-color:var(--primary);margin-top:10px;font-size:.92rem}.quiz-nav{justify-content:space-between;gap:10px;margin-top:22px;display:flex}.qgrid{grid-template-columns:repeat(auto-fill,minmax(40px,1fr));gap:6px;display:grid}.qcell{border:1px solid var(--border);background:var(--surface);cursor:pointer;border-radius:8px;height:38px;font-size:.85rem;font-weight:600}.qcell.answered{background:var(--primary-soft);border-color:var(--primary);color:var(--primary)}.qcell.flag{box-shadow:inset 0 -3px 0 var(--accent)}.qcell.current{outline:2px solid var(--text);outline-offset:1px}.kbd-hint{text-align:center;font-size:.8rem}.exam-intro{text-align:center;flex-direction:column;align-items:center;gap:12px;padding:40px 28px;display:flex}.exam-intro>.icon{color:var(--violet)}.exam-rules{color:var(--text-2);flex-direction:column;gap:6px;margin:0 0 10px;padding:0;list-style:none;display:flex}.result-card{align-items:center;gap:28px;padding:28px;display:flex}.result-card h1{margin-bottom:4px}.result-card.ok .ring-value{stroke:var(--ok)}.result-card.bad .ring-value{stroke:var(--bad)}.result-card.ok>.icon{color:var(--accent)}.review-list{flex-direction:column;gap:22px;margin:0;padding-left:1.4em;display:flex}.review-list>li{border-bottom:1px solid var(--border);padding-bottom:18px}.review-list>li::marker{font-weight:800}.review-list>li.ok::marker{color:var(--ok)}.review-list>li.bad::marker{color:var(--bad)}.review-list .question-text{margin-bottom:10px;font-size:1rem}.review-choices{flex-direction:column;gap:6px;margin:0;padding:0;list-style:none;display:flex}.review-choices li{border-radius:8px;align-items:center;gap:10px;padding:6px 10px;display:flex}.review-choices li.correct{background:var(--ok-soft)}.review-choices li.correct .choice-letter{background:var(--ok);color:#fff}.review-choices li.wrong{background:var(--bad-soft)}.review-choices li.wrong .choice-letter{background:var(--bad);color:#fff}.mode-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.mode-card{text-align:left;cursor:pointer;border-width:2px;flex-direction:column;align-items:flex-start;gap:6px;display:flex}.mode-card .icon{color:var(--primary)}.mode-card.active{border-color:var(--primary);background:var(--primary-soft)}.mode-card .muted{font-size:.88rem}.fc-stack{flex-shrink:0;width:150px;height:110px;position:relative}.fc-stack div{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:14px;position:absolute;inset:0}.fc-stack div:first-child{transform:rotate(-8deg)translate(-8px,4px)}.fc-stack div:nth-child(2){transform:rotate(5deg)translate(6px,2px)}.fc-stack div:nth-child(3){background:linear-gradient(135deg, var(--violet), var(--primary));color:#fff;place-items:center;display:grid}.fc-modules{flex-direction:column;display:flex}.fc-module{border-bottom:1px solid var(--border);align-items:center;gap:14px;padding:12px 4px;display:flex}.fc-module:last-child{border-bottom:0}.fc-module-main{flex-direction:column;flex:1;gap:4px;min-width:0;display:flex}.fc-module-main .muted{font-size:.82rem}.flashcard{perspective:1400px;cursor:pointer;outline:none;min-height:340px}.flashcard-inner{min-height:340px;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,.2,.2,1);display:grid;position:relative}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-lg);text-align:center;border-radius:20px;flex-direction:column;grid-area:1/1;justify-content:center;align-items:center;padding:44px 32px 40px;font-size:1.15rem;display:flex;position:relative}.flashcard-face .md{width:100%}.flashcard-face.front .md{font-size:1.25rem;font-weight:600}.flashcard-face.back{background:linear-gradient(160deg, var(--surface), var(--violet-soft));text-align:left;font-size:1.05rem;transform:rotateY(180deg)}.flashcard-face.back .md{text-align:center}.flashcard-face .md ul,.flashcard-face .md ol{text-align:left;display:inline-block}.fc-tag{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;text-align:left;font-size:.75rem;font-weight:600;position:absolute;top:14px;left:18px;right:18px}.fc-hint{color:var(--muted);align-items:center;gap:6px;font-size:.8rem;display:inline-flex;position:absolute;bottom:14px}.grade-bar{grid-template-columns:repeat(4,1fr);gap:10px;display:grid}.grade-bar>.btn-block{grid-column:1/-1}.grade{border-width:2px;flex-direction:column;gap:0;height:60px}.grade small{opacity:.6;font-size:.72rem}.grade-bad{border-color:var(--bad);color:var(--bad)}.grade-warn{border-color:var(--warn);color:var(--warn)}.grade-ok{border-color:var(--ok);color:var(--ok)}.grade-primary{border-color:var(--primary);color:var(--primary)}.search-results{flex-direction:column;gap:10px;display:flex}.search-result{color:var(--text);flex-direction:column;gap:4px;display:flex}.search-result:hover{border-color:var(--primary);text-decoration:none}.search-result p{margin:0;font-size:.9rem}.admin-module{padding:0}.admin-module-head{justify-content:space-between;align-items:center;padding:10px 14px;display:flex}.admin-module-toggle{cursor:pointer;text-align:left;background:0 0;border:0;flex:1;align-items:center;gap:12px;min-width:0;display:flex}.admin-module-toggle small{display:block}.admin-subs{border-top:1px solid var(--border);flex-direction:column;gap:2px;padding:10px 14px 14px;display:flex}.admin-subs>.btn{align-self:flex-start;margin-top:8px}.admin-sub{border-radius:8px;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:12px;padding:6px 8px;display:grid}.admin-sub:hover{background:var(--surface-2)}.admin-sub a{color:var(--text)}.admin-sub .muted{font-size:.82rem}.admin-items{flex-direction:column;gap:12px;display:flex}.admin-cards{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:12px;display:grid}.admin-item-head{justify-content:space-between;align-items:center;margin-bottom:8px;font-size:.82rem;display:flex}.editor-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;font-size:.82rem;display:flex}.editor{gap:14px;height:70vh;display:grid}.editor.split{grid-template-columns:1fr 1fr}.code-area{resize:none;width:100%;height:100%;font-family:var(--mono);border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface-2);outline:none;padding:14px;font-size:.85rem;line-height:1.55}.editor-preview{border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px 18px;overflow-y:auto}.sticky-save{background:var(--surface);align-items:center;gap:14px;padding:12px 0 0;display:flex;position:sticky;bottom:0}@media (width<=1100px){.course-layout{grid-template-columns:minmax(0,1fr)}.toc{display:none}.toc-mobile{display:block}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=900px){.sidebar{box-shadow:var(--shadow-lg);transition:transform .25s;transform:translate(-100%)}.sidebar.open{transform:none}.topbar,.main{margin-left:0}.topbar{padding:0 12px}.only-mobile{display:inline-flex!important}.topbar .brand small,.topbar .search{display:none}.topbar>.icon-btn:last-child{margin-left:auto}.main{padding:18px 16px 40px}.grid-2{grid-template-columns:minmax(0,1fr)}.auth-page{grid-template-columns:1fr}.auth-hero{padding-top:90px;padding-bottom:40px}.auth-plane{display:none}.sub-row{flex-direction:column;align-items:stretch;gap:12px}.sub-side{width:100%}.editor.split{grid-template-columns:1fr;height:auto}.editor .code-area{height:50vh}.form-grid{grid-template-columns:1fr}}@media (width<=640px){body{font-size:14.5px}.card{padding:16px}.hero{flex-direction:column-reverse;align-items:flex-start;padding:20px}.stats-grid{gap:10px}.stat{gap:10px;padding:12px}.stat-icon{width:36px;height:36px}.stat-value{font-size:1.1rem}.module-progress{grid-template-columns:36px minmax(0,1fr) 44px}.module-progress .bar{grid-area:2/2/auto/3}.mode-grid{grid-template-columns:1fr}.result-card{text-align:center;flex-direction:column}.result-card .hero-actions{justify-content:center}.question-card{padding:18px}.question-text{font-size:1.02rem}.grade-bar{grid-template-columns:repeat(2,1fr)}.flashcard,.flashcard-inner{min-height:300px}.flashcard-face{padding:40px 18px 36px}.pager{flex-direction:column}.pager-link{max-width:100%}.course-body{font-size:.98rem}.course-body h2{font-size:1.3rem}.fc-module{flex-wrap:wrap}.fc-module .sub-actions{width:100%}.admin-sub{grid-template-columns:minmax(0,1fr) auto}.admin-sub .muted{display:none}}.md svg{font-family:var(--font);overflow:visible}.md svg text{fill:var(--text);font-size:13px}.md svg text.small{fill:var(--muted);font-size:11px}.md svg text.title{font-size:14px;font-weight:700}.md svg .ln{stroke:var(--text-2);fill:none;stroke-width:1.6px}.md svg .ln-p{stroke:var(--primary);fill:none;stroke-width:2.2px}.md svg .ln-a{stroke:var(--accent);fill:none;stroke-width:2.2px}.md svg .ln-ok{stroke:var(--ok);fill:none;stroke-width:2.2px}.md svg .ln-bad{stroke:var(--bad);fill:none;stroke-width:2.2px}.md svg .ln-v{stroke:var(--violet);fill:none;stroke-width:2.2px}.md svg .thin{stroke-width:1px}.md svg .thick{stroke-width:3.5px}.md svg .dash{stroke-dasharray:5 4}.md svg .f-p{fill:var(--primary)}.md svg .f-a{fill:var(--accent)}.md svg .f-ok{fill:var(--ok)}.md svg .f-bad{fill:var(--bad)}.md svg .f-v{fill:var(--violet)}.md svg .f-soft,.md svg .f-soft-p{fill:var(--primary-soft)}.md svg .f-soft-a{fill:var(--accent-soft)}.md svg .f-soft-ok{fill:var(--ok-soft)}.md svg .f-soft-bad{fill:var(--bad-soft)}.md svg .f-soft-v{fill:var(--violet-soft)}.md svg .f-surf{fill:var(--surface-2)}.md svg .f-text{fill:var(--text)}.md svg text.on-dark{fill:#fff}