@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(../media/KaTeX_AMS-Regular.25ieegmnh38ts.woff2)format("woff2"),url(../media/KaTeX_AMS-Regular.10y3kupq4t663.woff)format("woff"),url(../media/KaTeX_AMS-Regular.418dr7cz3fo2x.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(../media/KaTeX_Caligraphic-Bold.06b-ya9t43ioz.woff2)format("woff2"),url(../media/KaTeX_Caligraphic-Bold.2vmk2hva4ctha.woff)format("woff"),url(../media/KaTeX_Caligraphic-Bold.40ltxhe834pns.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(../media/KaTeX_Caligraphic-Regular.2eph4dlhid_m9.woff2)format("woff2"),url(../media/KaTeX_Caligraphic-Regular.3gxeetazf831f.woff)format("woff"),url(../media/KaTeX_Caligraphic-Regular.07-7u27-nhn_r.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(../media/KaTeX_Fraktur-Bold.2sasz-d-jtw8y.woff2)format("woff2"),url(../media/KaTeX_Fraktur-Bold.1alcy76__wdj2.woff)format("woff"),url(../media/KaTeX_Fraktur-Bold.19yqa_tc9d_gx.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(../media/KaTeX_Fraktur-Regular.2d10y4xmjvzlf.woff2)format("woff2"),url(../media/KaTeX_Fraktur-Regular.110oo81prr9n5.woff)format("woff"),url(../media/KaTeX_Fraktur-Regular.2qhy34r6a05dn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(../media/KaTeX_Main-Bold.3-rowy8o6_4ky.woff2)format("woff2"),url(../media/KaTeX_Main-Bold.0v1esh257kqpe.woff)format("woff"),url(../media/KaTeX_Main-Bold.0us_n0tnxlxu7.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(../media/KaTeX_Main-BoldItalic.14r2naom8mrec.woff2)format("woff2"),url(../media/KaTeX_Main-BoldItalic.13355ck5zr48q.woff)format("woff"),url(../media/KaTeX_Main-BoldItalic.3x_u9cepaced0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(../media/KaTeX_Main-Italic.0lig0v9j0700p.woff2)format("woff2"),url(../media/KaTeX_Main-Italic.0afv392dj4w59.woff)format("woff"),url(../media/KaTeX_Main-Italic.2hkw3230mfwcv.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(../media/KaTeX_Main-Regular.1ryvsdzh2w1_e.woff2)format("woff2"),url(../media/KaTeX_Main-Regular.15u8r3b2y7fv4.woff)format("woff"),url(../media/KaTeX_Main-Regular.0symfa7dqj6jd.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(../media/KaTeX_Math-BoldItalic.1oopuu636h4il.woff2)format("woff2"),url(../media/KaTeX_Math-BoldItalic.12pl58orkw9rg.woff)format("woff"),url(../media/KaTeX_Math-BoldItalic.0y5w36a5aq__2.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(../media/KaTeX_Math-Italic.32405s1aq8vas.woff2)format("woff2"),url(../media/KaTeX_Math-Italic.0w0b1ugh62cfr.woff)format("woff"),url(../media/KaTeX_Math-Italic.2vkekfblmz5nb.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(../media/KaTeX_SansSerif-Bold.0h3wi2z_eouyg.woff2)format("woff2"),url(../media/KaTeX_SansSerif-Bold.1ovw5p-yjp56g.woff)format("woff"),url(../media/KaTeX_SansSerif-Bold.2d03q85pwxpti.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(../media/KaTeX_SansSerif-Italic.0wkjc4dm2kcit.woff2)format("woff2"),url(../media/KaTeX_SansSerif-Italic.1qavw__2zz8gk.woff)format("woff"),url(../media/KaTeX_SansSerif-Italic.3i-q087b23-m8.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(../media/KaTeX_SansSerif-Regular.2peiewu59z3d-.woff2)format("woff2"),url(../media/KaTeX_SansSerif-Regular.1i4afx8nk8n4r.woff)format("woff"),url(../media/KaTeX_SansSerif-Regular.31pbu25feko_c.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(../media/KaTeX_Script-Regular.11h14300o9pd0.woff2)format("woff2"),url(../media/KaTeX_Script-Regular.3110jb9c-bxna.woff)format("woff"),url(../media/KaTeX_Script-Regular.28p_x7iz71ofe.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(../media/KaTeX_Size1-Regular.03lhvx36ekcou.woff2)format("woff2"),url(../media/KaTeX_Size1-Regular.1slf4bh0hc6vm.woff)format("woff"),url(../media/KaTeX_Size1-Regular.1y57-ck23ey8c.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(../media/KaTeX_Size2-Regular.14s5gg-puz6h-.woff2)format("woff2"),url(../media/KaTeX_Size2-Regular.0-kwyvx03omo8.woff)format("woff"),url(../media/KaTeX_Size2-Regular.2u0s-b07k2o9m.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(../media/KaTeX_Size3-Regular.1n1rgzz84z8r9.woff2)format("woff2"),url(../media/KaTeX_Size3-Regular.04o9a_02gu_e8.woff)format("woff"),url(../media/KaTeX_Size3-Regular.1pkn-dge4q0fv.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(../media/KaTeX_Size4-Regular.2sgotkdv3dcyv.woff2)format("woff2"),url(../media/KaTeX_Size4-Regular.3p2r1l7xmebxv.woff)format("woff"),url(../media/KaTeX_Size4-Regular.2uelkfk2yna5e.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(../media/KaTeX_Typewriter-Regular.11gr2d2wuwz77.woff2)format("woff2"),url(../media/KaTeX_Typewriter-Regular.12f8myjij3617.woff)format("woff"),url(../media/KaTeX_Typewriter-Regular.3nee9kjfy6nm8.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.17.0"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.newline{display:block}.katex .base{white-space:nowrap;width:min-content;position:relative}.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;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 .vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{flex-direction:row;display:inline-flex}.katex .thinbox{width:0;max-width:0}.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 .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{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.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;width:100%;display:inline-block}.katex .hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.root{margin-left:.277778em;margin-right:-.555556em}.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:.833333em}.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:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.33333em}.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:1.66667em}.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:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.857143em}.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:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.55429em}.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:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.888889em}.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:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.33333em}.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:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.76444em}.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:.416667em}.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:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.666667em}.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:.833333em}.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:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.555556em}.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:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.833333em}.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:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.833333em}.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:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.833173em}.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:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.833601em}.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{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 .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{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 .stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .stretchy:after,.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 .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 .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>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}
:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f5f7f3;--ink:#171a16;--muted:#667066;--line:#d8ded5;--panel:#fff;--green:#176b47;--green-soft:#e8f3ec;--blue:#245f9c;--code:#121713;--danger:#b44235}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--ink);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}code{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace}.site-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;width:100%;height:74px;margin:0 auto;padding:0 24px;display:flex}.brand{align-items:center;gap:10px;font-weight:800;display:flex}.brand-mark{background:var(--ink);color:#fff;place-items:center;width:30px;height:30px;font-size:.72rem;display:grid}nav{color:var(--muted);gap:24px;font-size:.92rem;display:flex}nav a:hover{color:var(--ink)}.feedback-nav-link{border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:999px;padding:3px 9px;font-size:.8rem;font-weight:750}.feedback-nav-link:hover{border-color:#aeb8ad}.header-cluster,.header-auth-link{align-items:center;display:flex}.header-cluster{gap:22px}.header-auth-link{border:1px solid var(--line);background:var(--panel);border-radius:6px;gap:7px;min-height:34px;padding:0 10px;font-size:.78rem;font-weight:750}.header-auth-link:hover{border-color:#aeb8ad}.header-auth-link.signed-in{max-width:230px}.header-auth-link.signed-in span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}main{max-width:1240px;margin:0 auto;padding:0 24px 64px}.hero{grid-template-columns:minmax(0,1fr) minmax(480px,.9fr);align-items:center;gap:64px;min-height:610px;padding:62px 0 76px;display:grid}.eyebrow{color:var(--green);text-transform:uppercase;margin:0 0 12px;font-size:.76rem;font-weight:850}h1,h2,h3,p{overflow-wrap:anywhere}h1{letter-spacing:0;margin:0;font-size:clamp(3.2rem,6vw,6.3rem);line-height:.96}.hero h1{font-size:clamp(2.8rem,5vw,5rem)}h2{letter-spacing:0;margin:0;font-size:clamp(2rem,3.8vw,3.5rem);line-height:1.03}h3{margin:0}.lede{max-width:660px;color:var(--muted);margin:24px 0 0;font-size:1.14rem}.actions{flex-wrap:wrap;gap:10px;margin-top:30px;display:flex}.hero-note{color:var(--muted);margin:12px 0 0;font-size:.78rem;font-weight:650}.button{border:1px solid var(--line);border-radius:7px;justify-content:center;align-items:center;gap:9px;min-height:44px;padding:0 17px;font-weight:750;display:inline-flex}.button.primary{border-color:var(--ink);background:var(--ink);color:#fff}.button.secondary{background:var(--panel)}.code-preview{background:var(--code);color:#e7efe8;border:1px solid #2b332d;border-radius:8px;overflow:hidden;box-shadow:0 24px 70px #18271d29}.preview-title,.editor-toolbar,.run-bar{justify-content:space-between;align-items:center;min-height:48px;padding:0 16px;display:flex}.preview-title{color:#bdc8bf;border-bottom:1px solid #ffffff17;font-size:.82rem}.preview-title>span:first-child{align-items:center;gap:8px;display:flex}.language-badge{color:#87cda3;text-transform:uppercase;border:1px solid;border-radius:4px;padding:3px 7px;font-size:.68rem;font-weight:800}.code-preview pre{min-height:310px;margin:0;padding:22px;font-size:.88rem;line-height:1.75;overflow:auto}.preview-result{color:#91dda9;border-top:1px solid #ffffff17;align-items:center;gap:8px;padding:15px 20px;font-size:.84rem;font-weight:750;display:flex}.section{border-top:1px solid var(--line);padding:72px 0}.section-heading{max-width:720px;margin-bottom:30px}.track-grid{border:1px solid var(--line);background:var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;display:grid}.track-card{background:var(--panel);min-height:230px;color:var(--ink);cursor:pointer;flex-direction:column;padding:20px;transition:box-shadow .15s;display:flex}.track-card:hover,.track-card:focus-visible{box-shadow:inset 0 -3px var(--blue)}.track-card:focus-visible{outline:2px solid var(--blue);outline-offset:-2px}.track-number{color:var(--blue);font:700 .75rem SFMono-Regular,monospace}.track-grid h3{margin-top:42px;font-size:1.03rem}.track-grid p{color:var(--muted);margin:9px 0 0;font-size:.88rem}.track-count{color:var(--muted);margin-top:auto;font-size:.75rem;font-weight:750}.roadmap-band{grid-template-columns:1fr .7fr;align-items:end;gap:64px;display:grid}.roadmap-band-copy{justify-items:start;gap:22px;display:grid}.roadmap-band-copy p{color:var(--muted);margin:0;font-size:1.05rem}.page-heading{max-width:900px;padding:64px 0 50px}.page-heading h1{font-size:clamp(3rem,6vw,5.4rem)}.roadmap-heading{max-width:980px}.roadmap-set-count{border:1px solid var(--line);background:var(--panel);color:var(--muted);text-transform:uppercase;border-radius:999px;margin-top:24px;padding:5px 9px;font-size:.68rem;font-weight:800;display:inline-block}.roadmap-list{display:grid}.learning-path-section{border:1px solid var(--line);background:radial-gradient(circle at 85% 0,#245f9c14,#0000 28%),linear-gradient(#fff,#fbfcfa);border-radius:12px;margin-bottom:56px;padding:32px;position:relative;overflow:hidden;box-shadow:0 18px 55px #171a160f}.learning-path-section:before{background:linear-gradient(90deg, var(--ink), var(--blue) 48%, var(--green));content:"";height:4px;position:absolute;top:0;left:0;right:0}.learning-path-heading{grid-template-columns:minmax(0,.9fr) minmax(320px,.7fr);align-items:end;gap:48px;margin-bottom:34px;display:grid}.learning-path-heading h2{font-size:clamp(1.8rem,3vw,2.8rem)}.learning-path-summary>p{color:var(--muted);margin:0;font-size:.94rem}.learning-path-summary>div{gap:7px;margin-top:14px;display:flex}.learning-path-summary>div span{border:1px solid var(--line);color:var(--muted);text-transform:uppercase;background:#ffffffb3;border-radius:999px;padding:4px 8px;font-size:.66rem;font-weight:800}.learning-path-map{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;display:grid}.learning-path-step{min-width:0;position:relative}.learning-path-station{align-items:center;height:48px;display:flex;position:relative}.learning-path-step:not(:last-child) .learning-path-station:after{z-index:0;background:linear-gradient(90deg, var(--blue), #5d8db9);content:"";border-radius:999px;height:4px;position:absolute;left:19px;right:-28px}.learning-path-station>span{z-index:1;border:4px solid var(--panel);background:var(--blue);color:#fff;width:38px;height:38px;box-shadow:0 0 0 1px var(--blue), 0 5px 16px #245f9c3d;border-radius:50%;place-items:center;font:800 .64rem SFMono-Regular,monospace;display:grid;position:relative}.learning-path-step:first-child .learning-path-station>span{background:var(--ink);box-shadow:0 0 0 1px var(--ink), 0 5px 16px #171a1633}.learning-path-step:last-child .learning-path-station>span{background:var(--green);box-shadow:0 0 0 1px var(--green), 0 5px 16px #176b473d}.learning-path-stage{border:1px solid var(--line);background:#ffffffc7;border-radius:9px;height:100%;min-height:340px;padding:20px}.learning-path-stage-label{color:var(--blue);text-transform:uppercase;font:800 .66rem SFMono-Regular,monospace}.learning-path-stage h3{margin-top:14px;font-size:1.02rem}.learning-path-stage>p{min-height:72px;color:var(--muted);margin:8px 0 16px;font-size:.78rem}.learning-path-problems{gap:8px;padding-left:11px;display:grid;position:relative}.learning-path-problems:before{content:"";background:#c8d8e7;width:2px;position:absolute;top:16px;bottom:16px;left:3px}.learning-path-problems a,.learning-path-problem-planned{border:1px solid var(--line);background:#fff;border-radius:7px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;min-height:55px;padding:9px 10px 9px 13px;display:grid;position:relative}.learning-path-problems a{transition:background .15s,border-color .15s,box-shadow .15s,transform .15s}.learning-path-problems a.solved{border-color:color-mix(in srgb, var(--green) 58%, var(--line));background:linear-gradient(90deg, color-mix(in srgb, var(--green) 18%, white), color-mix(in srgb, var(--green) 7%, white));box-shadow:inset 4px 0 0 var(--green), 0 5px 14px #176b4714}.learning-path-problems a:hover,.learning-path-problems a:focus-visible{border-color:var(--green);outline:0;transform:translateY(-2px);box-shadow:0 7px 20px #176b471a}.learning-path-problem-dot{background:var(--blue);width:10px;height:10px;box-shadow:0 0 0 1px var(--blue);border:2px solid #fff;border-radius:50%;position:absolute;top:50%;left:-16px;transform:translateY(-50%)}.learning-path-problem-dot.solved{background:var(--green);box-shadow:0 0 0 1px var(--green)}.learning-path-problem-copy{min-width:0;display:grid}.learning-path-problem-copy strong{font-size:.75rem;line-height:1.25}.learning-path-problems small{color:var(--muted);margin-top:3px;font-size:.61rem;font-weight:650}.learning-path-problems a.solved small{color:color-mix(in srgb, var(--green) 78%, var(--ink))}.learning-path-problems a>svg{color:#8d978e;transition:color .15s}.learning-path-problems a.solved>svg,.learning-path-problems a:hover>svg{color:var(--green)}.learning-path-step:last-child .learning-path-problem-dot{background:var(--green);box-shadow:0 0 0 1px var(--green)}.learning-path-outcome{background:linear-gradient(90deg, var(--green-soft), #e8f3ec47);border:1px dashed #9fc8ae;border-radius:8px;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:12px;margin-top:20px;padding:15px 17px;display:grid}.learning-path-outcome-icon{background:var(--green);color:#fff;border-radius:50%;place-items:center;width:34px;height:34px;display:grid}.learning-path-outcome>span:last-child{display:grid}.learning-path-outcome small{color:var(--green);letter-spacing:.08em;text-transform:uppercase;font-size:.61rem;font-weight:850}.learning-path-outcome strong{margin-top:1px;font-size:.8rem}.learning-path-outcome p{color:var(--muted);margin:3px 0 0;font-size:.72rem}.catalog-section{padding-bottom:30px}.problem-toolbar{grid-template-columns:minmax(260px,1fr) 190px 130px auto;align-items:center;gap:10px;margin-bottom:18px;display:grid}.problem-toolbar input,.problem-toolbar select{border:1px solid var(--line);background:var(--panel);width:100%;height:40px;color:var(--ink);border-radius:6px;padding:0 11px}.search-control{align-items:center;display:flex;position:relative}.search-control svg{color:var(--muted);position:absolute;left:12px}.search-control input{padding-left:38px}.problem-count{color:var(--muted);text-align:right;white-space:nowrap;font-size:.85rem;font-weight:750}.problem-table-head,.problem-row{grid-template-columns:minmax(280px,1fr) 170px 90px 90px;align-items:center;gap:14px;display:grid}.problem-table-head{color:var(--muted);text-transform:uppercase;padding:0 14px 7px;font-size:.68rem;font-weight:800}.problem-rows{border-top:1px solid var(--line)}.problem-row{border-bottom:1px solid var(--line);min-height:61px;color:var(--muted);padding:9px 14px}.problem-row.available{background:var(--panel);color:var(--ink)}.problem-row.available:hover{box-shadow:inset 3px 0 var(--green)}.problem-main{min-width:0}.problem-main h2{font-size:.96rem;line-height:1.2}.problem-main p{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;margin:3px 0 0;font-size:.8rem;overflow:hidden}.problem-row>span,.problem-row>strong{font-size:.79rem}.problem-row>strong{color:var(--blue)}.problem-row>strong.solved{color:var(--green)}.track-label{color:var(--green);font-weight:750}.empty-state{border-bottom:1px solid var(--line);color:var(--muted);text-align:center;padding:32px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.workspace-main{max-width:none;padding-bottom:32px}.workspace-heading{border-bottom:1px solid var(--line);min-height:54px;color:var(--muted);justify-content:space-between;align-items:center;font-size:.78rem;display:flex}.workspace-heading a{color:var(--blue);align-items:center;gap:7px;font-weight:750;display:inline-flex}.workspace-heading>div{gap:14px;display:flex}.difficulty{color:var(--green);font-weight:800}.practice-workspace{min-height:calc(100vh - 160px);display:grid}.problem-pane{min-width:0;padding:32px 28px 40px 0}.problem-pane h1{font-size:clamp(2.1rem,3.1vw,3.35rem)}.problem-summary{color:var(--muted);margin:16px 0 24px;font-size:1.02rem}.statement-tabs{border-bottom:1px solid var(--line);grid-template-columns:repeat(4,1fr);display:grid}.statement-tabs button{min-height:42px;color:var(--muted);background:0 0;border:0;border-bottom:2px solid #0000;justify-content:center;align-items:center;gap:7px;padding:0 8px;font-size:.76rem;font-weight:800;display:inline-flex}.statement-tabs button:hover{color:var(--ink)}.statement-tabs button[aria-selected=true]{border-bottom-color:var(--green);color:var(--green)}.statement-tabs button:focus-visible{outline:2px solid var(--blue);outline-offset:-3px}.practice-variant-picker{gap:7px;margin:22px 0 4px;display:grid}.practice-variant-picker>span{color:var(--muted);letter-spacing:.08em;text-transform:uppercase;font-size:.68rem;font-weight:850}.practice-variant-picker>div{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;display:grid}.practice-variant-picker button{border:1px solid var(--line);background:var(--panel);min-width:0;color:var(--muted);text-align:left;border-radius:5px;gap:3px;padding:10px;display:grid}.practice-variant-picker button:hover,.practice-variant-picker button[aria-pressed=true]{border-color:var(--green)}.practice-variant-picker button[aria-pressed=true]{background:var(--green-soft)}.practice-variant-picker strong{color:var(--ink);font-size:.76rem}.practice-variant-picker small{text-overflow:ellipsis;font-size:.66rem;line-height:1.35;overflow:hidden}.statement-view{min-height:420px}.statement-block{border-top:1px solid var(--line);padding:24px 0}.statement-view>.statement-block:first-child{border-top:0}.statement-block h2{margin-bottom:10px;font-size:1.05rem}.statement-block p,.statement-block ul{color:var(--muted);margin:0;font-size:.9rem}.statement-block ul{gap:8px;padding-left:20px;display:grid}.statement-block code{color:var(--ink)}.example-code{background:#e9ede7;border-radius:6px;margin:0;padding:16px;font-size:.82rem;overflow:auto}.math-formula{border-left:3px solid var(--green);scrollbar-width:thin;background:#e9ede7;margin:16px 0 0;padding:14px 16px;font-size:.8rem;overflow:auto hidden}.math-formula .katex-display{width:max-content;min-width:100%;margin:0}.math-symbol{color:var(--ink);display:inline-block}.notation-list{border-top:1px solid var(--line);margin:14px 0 0;display:grid}.notation-list>div{border-bottom:1px solid var(--line);grid-template-columns:minmax(190px,.3fr) minmax(0,1fr);align-items:center;gap:18px;min-height:42px;display:grid}.notation-list dt,.notation-list dd{margin:0}.notation-list dt{min-width:0;padding:8px 0;font-size:.78rem}.notation-list dt code{overflow-wrap:anywhere}.notation-list dd{min-width:0;color:var(--muted);padding:8px 0;font-size:.76rem}.pytorch-doc-link{max-width:100%;color:var(--ink);text-decoration:underline;-webkit-text-decoration-color:var(--line);text-decoration-color:var(--line);text-underline-offset:3px;grid-template-columns:minmax(0,max-content) 12px;align-items:center;gap:6px;display:inline-grid}.pytorch-doc-link svg{opacity:.6;flex:0 0 12px;width:12px;height:12px}.related-topics{flex-wrap:wrap;gap:7px;display:flex}.related-topics span,.related-topics a{border:1px solid var(--line);background:var(--panel);color:var(--muted);border-radius:4px;padding:4px 7px;font-size:.72rem;font-weight:750}.related-topics a{color:var(--green);text-decoration:none}.related-topics a:hover{border-color:var(--green)}.follow-up-intro{margin-bottom:14px!important}.follow-up-list{gap:8px;margin:0;padding:0;list-style:none;display:grid}.follow-up-list li{border:1px solid var(--line);background:var(--panel);border-radius:5px;grid-template-columns:auto minmax(0,1fr);gap:12px;padding:12px;display:grid}.follow-up-list li>span{background:var(--green-soft);width:28px;height:28px;color:var(--green);border-radius:50%;place-items:center;font-size:.68rem;font-weight:850;display:grid}.follow-up-list h3{color:var(--ink);margin:1px 0 4px;font-size:.82rem}.statement-block .follow-up-list p{font-size:.78rem;line-height:1.45}.open-follow-up{color:var(--green);background:0 0;border:0;align-items:center;gap:3px;margin-top:9px;padding:0;font-size:.72rem;font-weight:800;display:inline-flex}.open-follow-up:hover{text-decoration:underline}.learning-series>p{margin-bottom:16px}.series-path{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.series-path a{border:1px solid var(--line);color:var(--muted);border-radius:5px;grid-template-columns:auto 1fr;align-items:center;gap:2px 7px;padding:10px;text-decoration:none;display:grid}.series-path a>span{background:var(--panel);border-radius:50%;grid-row:1/3;place-items:center;width:22px;height:22px;font-size:.7rem;font-weight:800;display:grid}.series-path strong{color:var(--ink);font-size:.78rem}.series-path small{font-size:.68rem}.series-path a:hover,.series-path a[aria-current=step]{border-color:var(--green)}.series-path a[aria-current=step]{background:var(--green-soft)}.series-comparison{margin-top:20px;overflow-x:auto}.series-comparison h3{margin:0 0 8px;font-size:.86rem}.series-comparison table{border-collapse:collapse;width:100%;min-width:720px;font-size:.72rem}.series-comparison th,.series-comparison td{border:1px solid var(--line);color:var(--muted);text-align:left;vertical-align:top;padding:8px}.series-comparison thead th,.series-comparison tbody th{color:var(--ink)}.series-comparison tr.is-current{background:var(--green-soft)}.complexity-grid{border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:1fr 1fr;display:grid}.complexity-grid>div{gap:3px;padding:12px 0;display:grid}.complexity-grid>div+div{border-left:1px solid var(--line);padding-left:16px}.complexity-grid span{color:var(--muted);text-transform:uppercase;font-size:.68rem;font-weight:750}.complexity-grid strong{font:750 .84rem SFMono-Regular,monospace}.complexity-note{margin-top:12px!important;font-size:.78rem!important}.hint-list{display:grid}.hint-item{border-bottom:1px solid var(--line);grid-template-columns:26px 1fr;gap:10px;padding:13px 0;display:grid}.hint-item:first-child{border-top:1px solid var(--line)}.hint-item>span{background:var(--green-soft);width:24px;height:24px;color:var(--green);border-radius:50%;place-items:center;font-size:.7rem;font-weight:850;display:grid}.hint-item p{padding-top:1px}.reveal-hint-button{border:1px solid var(--line);background:var(--panel);min-height:36px;color:var(--ink);border-radius:6px;align-items:center;gap:7px;margin-top:14px;padding:0 11px;font-size:.76rem;font-weight:800;display:inline-flex}.reveal-hint-button:hover{border-color:var(--green);color:var(--green)}.all-hints-shown{margin-top:14px!important;font-size:.76rem!important}.resize-handle{cursor:col-resize;touch-action:none;background:0 0;border:0;width:10px;min-height:100%;padding:0;position:relative}.resize-handle:before{background:var(--line);content:"";width:1px;transition:width .12s,background .12s;position:absolute;inset:0 auto 0 50%;transform:translate(-50%)}.resize-handle span{opacity:0;background:#aeb8ad;border-radius:3px;width:4px;height:38px;margin:0 auto;transition:opacity .12s;display:block;position:sticky;top:50%;transform:translateY(-50%)}.resize-handle:hover:before,.resize-handle:focus-visible:before{background:var(--green);width:3px}.resize-handle:hover span,.resize-handle:focus-visible span{opacity:1}.resize-handle:focus-visible{outline:2px solid var(--blue);outline-offset:-2px}.is-resizing{cursor:col-resize;-webkit-user-select:none;user-select:none}.coding-pane{background:var(--code);color:#e7efe8;border:1px solid #2b332d;border-radius:8px;align-self:start;min-width:0;margin:32px 0 0 24px;overflow:hidden}.editor-toolbar{border-bottom:1px solid #ffffff17}.editor-toolbar>div{align-items:center;gap:10px;display:flex}.editor-toolbar>.editor-actions{gap:4px}.copy-status{color:#8ed7a8;text-align:right;min-width:44px;font-size:.68rem}.file-name{font:700 .78rem SFMono-Regular,monospace}.draft-save-status{color:#8f9a91;white-space:nowrap;font-size:.68rem}.draft-save-status.error{color:#f0a29a}.implementation-switch{background:#171c18;border:1px solid #3d473f;border-radius:6px;padding:2px;display:flex}.implementation-switch button{color:#9ba69d;background:0 0;border:0;border-radius:4px;align-items:center;gap:5px;min-height:26px;padding:0 9px;font-size:.7rem;font-weight:750;display:inline-flex}.implementation-switch button.active{color:#f1f6f2;background:#354139}.implementation-switch button:disabled{cursor:not-allowed;opacity:.48}.implementation-switch button span{color:#8f9a91;text-transform:uppercase;font-size:.55rem}.icon-button{color:#b7c1b9;background:0 0;border:0;border-radius:5px;place-items:center;width:32px;height:32px;display:grid}.icon-button:hover{color:#fff;background:#ffffff14}.cm-editor{font-size:13px}.run-bar{color:#9ba69d;border-top:1px solid #ffffff17;border-bottom:1px solid #ffffff17;font-size:.75rem}.run-actions{gap:8px;display:flex}.auth-run-link{text-decoration:none}.run-button,.submit-button{border-radius:6px;align-items:center;gap:8px;min-height:34px;padding:0 13px;font-size:.78rem;font-weight:850;display:inline-flex}.run-button{color:#e0e8e2;background:#283029;border:1px solid #49534b}.submit-button{color:#102117;background:#75d394;border:1px solid #75d394}.run-button:disabled,.submit-button:disabled{cursor:wait;opacity:.75}.results-panel{background:#171c18;min-height:156px}.result-placeholder{color:#8f9a91;align-items:center;gap:8px;padding:22px 18px;font-size:.8rem;display:flex}.result-summary{border-bottom:1px solid #ffffff14;justify-content:space-between;align-items:center;min-height:46px;padding:0 16px;font-size:.8rem;display:flex}.result-summary>div{align-items:center;gap:8px;display:flex}.result-summary.accepted{color:#8adca5}.result-summary.failed,.result-summary.error,.result-summary.timeout{color:#f18f83}.result-summary>span{color:#89948b;font-size:.72rem}.timing-row{color:#839087;border-bottom:1px solid #ffffff0f;flex-wrap:wrap;gap:6px 12px;min-height:32px;padding:8px 16px;font-size:.68rem;display:flex}.timing-row span:first-child{color:#9fcfac}.test-row{color:#b7c1b9;border-bottom:1px solid #ffffff0d;grid-template-columns:18px minmax(140px,1fr) minmax(180px,auto);align-items:center;gap:9px;min-height:38px;padding:0 16px;font-size:.75rem;display:grid}.test-row svg:first-child{color:#7ad298}.test-row:has(svg.lucide-x) svg{color:#ed8073}.test-row code{color:#7f8b81;text-align:right;text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.error-output{color:#f0a198;white-space:pre-wrap;max-height:170px;margin:0;padding:14px 16px;font-size:.72rem;overflow:auto}.spin{animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.auth-main{place-items:start center;min-height:calc(100vh - 74px);padding-top:72px;display:grid}.auth-panel{border:1px solid var(--line);background:var(--panel);border-radius:8px;width:min(100%,430px);padding:28px}.auth-heading h1{font-size:2rem;line-height:1.05}.auth-intro{color:var(--muted);margin-top:9px;font-size:.83rem;line-height:1.5}.auth-switch{border:1px solid var(--line);background:#eef1ec;border-radius:7px;grid-template-columns:1fr 1fr;margin:26px 0 20px;padding:3px;display:grid}.auth-switch a{min-height:34px;color:var(--muted);border-radius:5px;place-items:center;font-size:.78rem;font-weight:750;display:grid}.auth-switch a.active{background:var(--panel);color:var(--ink);box-shadow:0 1px 4px #141c151a}.auth-form{gap:8px;display:grid}.auth-form label{color:var(--muted);margin-top:8px;font-size:.76rem;font-weight:750}.auth-form input{border:1px solid var(--line);width:100%;height:42px;color:var(--ink);background:#fff;border-radius:6px;padding:0 11px}.auth-form input:focus{border-color:var(--blue);outline:2px solid #245f9c24}.auth-field-help{color:var(--muted);margin:0 0 2px;font-size:.72rem;line-height:1.45}.auth-submit{width:100%;margin-top:14px}.auth-submit:disabled{cursor:wait;opacity:.72}.auth-help-link{color:var(--blue);justify-self:end;font-size:.76rem;font-weight:750}.auth-help-link:hover{text-decoration:underline}.turnstile-field{min-height:65px;margin-top:12px}.turnstile-field>div{width:100%}.auth-back-link{color:var(--muted);align-items:center;gap:6px;margin-top:20px;font-size:.76rem;font-weight:750;display:inline-flex}.auth-back-link:hover{color:var(--ink)}.auth-notice{border-left:3px solid var(--green);background:var(--green-soft);color:#315b43;margin:0 0 12px;padding:10px 12px;font-size:.78rem}.auth-notice.error{border-left-color:var(--danger);color:#87372e;background:#faece9}.feedback-main{place-items:start center;min-height:calc(100vh - 74px);padding-top:72px;display:grid}.feedback-panel{border:1px solid var(--line);background:var(--panel);border-radius:8px;width:min(100%,570px);padding:30px}.feedback-heading{align-items:flex-start;gap:13px;display:flex}.feedback-heading>svg{color:var(--green);flex:none;margin-top:3px}.feedback-heading h1{font-size:2rem;line-height:1.05}.feedback-intro{color:var(--muted);margin:14px 0 22px 35px;font-size:.92rem}.feedback-form{gap:8px;display:grid}.feedback-form label{color:var(--muted);margin-top:8px;font-size:.76rem;font-weight:750}.feedback-form select,.feedback-form input,.feedback-form textarea{border:1px solid var(--line);width:100%;color:var(--ink);background:#fff;border-radius:6px;padding:10px 11px}.feedback-form select,.feedback-form input{height:42px}.feedback-form select{padding-top:0;padding-bottom:0}.feedback-form textarea{resize:vertical;min-height:140px}.feedback-form select:focus,.feedback-form input:focus,.feedback-form textarea:focus{border-color:var(--blue);outline:2px solid #245f9c24}.required-star{color:#ef4444;margin-left:2px}.feedback-signup-note{color:var(--muted);margin:9px 0 0;font-size:.75rem}.feedback-submit{justify-self:end;margin-top:10px}.account-main{max-width:1000px}.account-heading{padding:64px 0 42px}.account-heading h1{font-size:clamp(2rem,5vw,3.7rem)}.account-row{border-top:1px solid var(--line);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;padding:20px 0;display:flex}.account-email{gap:3px;display:grid}.account-row span{color:var(--muted);font-size:.74rem}.account-row strong{font-size:.9rem}.account-actions{flex-wrap:wrap;gap:10px;display:flex}.account-signout{appearance:none;color:var(--ink);-webkit-text-fill-color:var(--ink)}.activity-section{padding:48px 0 24px}.activity-heading,.recent-activity-heading{justify-content:space-between;align-items:end;gap:20px;display:flex}.activity-heading .eyebrow{margin-bottom:7px}.activity-heading h2,.recent-activity-heading h2{font-size:1.35rem}.activity-heading>span,.recent-activity-heading>span{color:var(--muted);font-size:.72rem}.activity-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:20px;display:grid}.activity-grid article{border:1px solid var(--line);background:var(--panel);border-radius:8px;min-height:150px;padding:18px;display:grid;position:relative}.activity-grid article>svg{color:var(--green);position:absolute;top:18px;right:18px}.activity-grid article>span{color:var(--muted);padding-right:28px;font-size:.76rem;font-weight:750}.activity-grid article>strong{align-self:end;font-size:2rem;line-height:1}.activity-grid article>small{color:var(--muted);align-self:end;font-size:.68rem}.recent-activity{margin-top:42px}.recent-activity-heading{border-bottom:1px solid var(--line);padding-bottom:14px}.submission-list>a{border-bottom:1px solid var(--line);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:20px;padding:15px 4px;display:grid}.submission-list>a:hover strong{color:var(--green)}.submission-list>a>div:first-child{gap:3px;display:grid}.submission-list strong{font-size:.86rem}.submission-list span,.submission-list small{color:var(--muted);font-size:.7rem}.submission-result{justify-items:end;gap:4px;display:grid}.submission-status{text-transform:capitalize;border-radius:999px;padding:2px 7px;font-weight:800}.submission-status.accepted{background:var(--green-soft);color:var(--green)}.submission-status.failed,.submission-status.error,.submission-status.timeout{color:var(--danger);background:#faece9}.activity-empty,.activity-unavailable{border-bottom:1px solid var(--line);color:var(--muted);padding:28px 4px;font-size:.82rem}.activity-unavailable{border-top:1px solid var(--line);margin-top:20px}.solution-lock-overlay{border:1px solid var(--line);background:radial-gradient(circle at 50% 50%, #176b470a, transparent 60%), var(--panel);text-align:center;border-radius:8px;justify-content:center;align-items:center;min-height:380px;padding:32px;display:flex;box-shadow:0 8px 30px #171a160a}.lock-content{flex-direction:column;align-items:center;gap:16px;max-width:320px;display:flex}.lock-icon-container{background:var(--green-soft);width:64px;height:64px;color:var(--green);border-radius:999px;place-items:center;display:grid}.lock-content h3{color:var(--ink);margin:0;font-size:1.2rem;font-weight:800}.lock-content p{color:var(--muted);margin:0;font-size:.88rem;line-height:1.5}.editorial-loading,.editorial-error{min-height:250px;color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:.88rem;display:flex}.editorial-code-wrapper{border:1px solid var(--line);background:var(--code);border-radius:6px;margin-top:10px;overflow:hidden}.editorial-explanation h2{margin-top:10px}.markdown-content p{color:var(--muted);font-size:.88rem;line-height:1.6}@media (max-width:1040px){.hero,.practice-workspace{grid-template-columns:1fr!important}.hero{min-height:auto}.track-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-path-map{grid-template-columns:repeat(4,minmax(230px,1fr));padding-bottom:10px;overflow-x:auto}.problem-pane{border-right:0;padding-right:0}.resize-handle{display:none}.coding-pane{margin-left:0}}@media (max-width:720px){.site-header{gap:12px;height:auto;min-height:68px}.brand{white-space:nowrap}.header-cluster{gap:9px}nav{gap:14px;font-size:.82rem}.site-header nav a:first-child,.site-header nav a:nth-child(3),.header-auth-link.signed-in span{display:none}main{padding-left:16px;padding-right:16px}h1{font-size:3rem}.hero{grid-template-columns:1fr;gap:38px;padding-top:42px}.hero .code-preview{display:none}.track-grid{grid-template-columns:1fr}.track-card{min-height:180px}.roadmap-band{grid-template-columns:1fr;gap:24px}.learning-path-section{padding:25px 18px}.learning-path-heading{grid-template-columns:1fr;gap:14px}.learning-path-map{grid-template-columns:1fr;gap:0;padding-bottom:0;overflow:visible}.learning-path-step{grid-template-columns:42px minmax(0,1fr);gap:10px;padding-bottom:20px;display:grid}.learning-path-step:last-child{padding-bottom:0}.learning-path-station{align-items:flex-start;height:100%}.learning-path-step:not(:last-child) .learning-path-station:after{background:linear-gradient(180deg, var(--blue), #5d8db9);width:4px;height:auto;inset:19px auto -20px 17px}.learning-path-stage{min-height:0;padding:18px}.learning-path-stage>p{min-height:0}.problem-toolbar{grid-template-columns:1fr 1fr}.search-control{grid-column:1/-1}.problem-count{text-align:left}.problem-table-head{display:none}.problem-row{grid-template-columns:1fr auto;gap:5px 12px}.problem-main{grid-column:1/-1}.problem-main p{white-space:normal}.workspace-heading{flex-direction:column;justify-content:center;align-items:flex-start;gap:6px}.workspace-heading>div{flex-wrap:wrap}.practice-workspace{display:block}.problem-pane{padding-top:24px}.statement-view{min-height:0}.notation-list>div{grid-template-columns:1fr;align-items:start;gap:0;min-height:0;padding:10px 0}.notation-list dt,.notation-list dd{padding:0}.notation-list dd{margin-top:6px}.coding-pane{margin-top:0}.editor-toolbar>div{gap:7px;min-width:0}.file-name,.draft-save-status{display:none}.implementation-switch button{padding:0 7px}.run-bar>span{display:none}.test-row{grid-template-columns:18px 1fr;padding:8px 14px}.test-row code{text-align:left;grid-column:2}.auth-main{padding-top:34px}.auth-panel{padding:22px}.feedback-main{padding-top:34px}.feedback-panel{padding:22px}.account-row{flex-direction:column;align-items:flex-start}.account-actions{width:100%}.activity-heading{align-items:flex-start}.activity-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.submission-list>a{gap:12px}}@media (max-width:480px){.site-header nav a:nth-child(2){display:none}.activity-grid{grid-template-columns:1fr}.activity-grid article{min-height:130px}.submission-list>a{grid-template-columns:1fr}.submission-result{justify-items:start}}.pytorch-doc-link:hover{color:var(--primary)!important;-webkit-text-decoration-color:var(--primary)!important;text-decoration-color:var(--primary)!important}