@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_AMS-Regular.BQhdFMY1.woff2)format("woff2"),url(/_astro/KaTeX_AMS-Regular.DMm9YOAa.woff)format("woff"),url(/_astro/KaTeX_AMS-Regular.DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/_astro/KaTeX_Caligraphic-Bold.Dq_IR9rO.woff2)format("woff2"),url(/_astro/KaTeX_Caligraphic-Bold.BEiXGLvX.woff)format("woff"),url(/_astro/KaTeX_Caligraphic-Bold.ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Caligraphic-Regular.Di6jR-x-.woff2)format("woff2"),url(/_astro/KaTeX_Caligraphic-Regular.CTRA-rTL.woff)format("woff"),url(/_astro/KaTeX_Caligraphic-Regular.wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/_astro/KaTeX_Fraktur-Bold.CL6g_b3V.woff2)format("woff2"),url(/_astro/KaTeX_Fraktur-Bold.BsDP51OF.woff)format("woff"),url(/_astro/KaTeX_Fraktur-Bold.BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Fraktur-Regular.CTYiF6lA.woff2)format("woff2"),url(/_astro/KaTeX_Fraktur-Regular.Dxdc4cR9.woff)format("woff"),url(/_astro/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(/_astro/KaTeX_Main-Bold.Cx986IdX.woff2)format("woff2"),url(/_astro/KaTeX_Main-Bold.Jm3AIy58.woff)format("woff"),url(/_astro/KaTeX_Main-Bold.waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/_astro/KaTeX_Main-BoldItalic.DxDJ3AOS.woff2)format("woff2"),url(/_astro/KaTeX_Main-BoldItalic.SpSLRI95.woff)format("woff"),url(/_astro/KaTeX_Main-BoldItalic.DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/_astro/KaTeX_Main-Italic.NWA7e6Wa.woff2)format("woff2"),url(/_astro/KaTeX_Main-Italic.BMLOBm91.woff)format("woff"),url(/_astro/KaTeX_Main-Italic.3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Main-Regular.B22Nviop.woff2)format("woff2"),url(/_astro/KaTeX_Main-Regular.Dr94JaBh.woff)format("woff"),url(/_astro/KaTeX_Main-Regular.ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/_astro/KaTeX_Math-BoldItalic.CZnvNsCZ.woff2)format("woff2"),url(/_astro/KaTeX_Math-BoldItalic.iY-2wyZ7.woff)format("woff"),url(/_astro/KaTeX_Math-BoldItalic.B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/_astro/KaTeX_Math-Italic.t53AETM-.woff2)format("woff2"),url(/_astro/KaTeX_Math-Italic.DA0__PXp.woff)format("woff"),url(/_astro/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(/_astro/KaTeX_SansSerif-Bold.D1sUS0GD.woff2)format("woff2"),url(/_astro/KaTeX_SansSerif-Bold.DbIhKOiC.woff)format("woff"),url(/_astro/KaTeX_SansSerif-Bold.CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/_astro/KaTeX_SansSerif-Italic.C3H0VqGB.woff2)format("woff2"),url(/_astro/KaTeX_SansSerif-Italic.DN2j7dab.woff)format("woff"),url(/_astro/KaTeX_SansSerif-Italic.YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_SansSerif-Regular.DDBCnlJ7.woff2)format("woff2"),url(/_astro/KaTeX_SansSerif-Regular.CS6fqUqJ.woff)format("woff"),url(/_astro/KaTeX_SansSerif-Regular.BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Script-Regular.D3wIWfF6.woff2)format("woff2"),url(/_astro/KaTeX_Script-Regular.D5yQViql.woff)format("woff"),url(/_astro/KaTeX_Script-Regular.C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Size1-Regular.mCD8mA8B.woff2)format("woff2"),url(/_astro/KaTeX_Size1-Regular.C195tn64.woff)format("woff"),url(/_astro/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(/_astro/KaTeX_Size2-Regular.Dy4dx90m.woff2)format("woff2"),url(/_astro/KaTeX_Size2-Regular.oD1tc_U0.woff)format("woff"),url(/_astro/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(/_astro/KaTeX_Size3-Regular.CTq5MqoE.woff)format("woff"),url(/_astro/KaTeX_Size3-Regular.DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Size4-Regular.Dl5lxZxV.woff2)format("woff2"),url(/_astro/KaTeX_Size4-Regular.BF-4gkZK.woff)format("woff"),url(/_astro/KaTeX_Size4-Regular.DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Typewriter-Regular.CO6r4hn1.woff2)format("woff2"),url(/_astro/KaTeX_Typewriter-Regular.C0xS9mPB.woff)format("woff"),url(/_astro/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{-webkit-clip-path:inset(50%);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{--paper:#f3ebdd;--paper-deep:#eadfcb;--card:#fdf9f2;--card-2:#f7f0e4;--grid:#8c6c4613;--ink:#2b231d;--ink-2:#66584b;--line:#e2d5c0;--line-strong:#cdbca2;--blue:#2b4c9b;--blue-deep:#1f3a7c;--blue-soft:#e3e8f4;--terracotta:#b9532c;--terracotta-deep:#8e3b1c;--terracotta-soft:#f4e0d1;--saffron:#b47a0e;--saffron-soft:#f8ead0;--green:#3d7a4f;--green-soft:#e1eedd;--red:#b0322a;--red-soft:#f6dcd6;--plum:#7b3f6c;--plum-soft:#f1e1ea;--teal:#2f6f68;--teal-soft:#dcece8;--shadow-sm:0 1px 2px #4a341e0f;--shadow:0 1px 2px #4a341e0d, 0 6px 18px -8px #4a341e2e;--radius:16px;--radius-sm:11px;--sidebar-w:288px;--font-display:Fraunces, "Iowan Old Style", Georgia, serif;--font-body:Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;color-scheme:light}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:80px}body{color:var(--ink);font-family:var(--font-body);-webkit-font-smoothing:antialiased;background-color:var(--paper);background-image:linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);background-size:26px 26px;margin:0;font-size:16px;line-height:1.6}::selection{background:var(--saffron-soft)}a{color:var(--blue)}h1,h2,h3{color:var(--ink);margin:0 0 .4em;line-height:1.2}.display{font-family:var(--font-display);letter-spacing:-.015em;font-variation-settings:"opsz" 96;font-weight:600}h1.display{font-size:clamp(1.85rem,3.6vw,2.7rem)}h2.display{font-size:clamp(1.4rem,2.6vw,1.8rem)}.display em{color:var(--terracotta);font-style:italic}button{font:inherit;color:inherit}.muted{color:var(--ink-2)}.small{font-size:.875rem}.tiny{font-size:.75rem;line-height:1.4}.icon{flex-shrink:0}.eyebrow{text-transform:uppercase;letter-spacing:.12em;color:var(--terracotta);margin:0 0 8px;font-size:.72rem;font-weight:700}.lead{color:var(--ink-2);max-width:62ch;margin:0;font-size:1.05rem}.section-title{font-family:var(--font-display);margin:36px 0 14px;font-size:1.35rem;font-weight:600}.section-intro{margin:-6px 0 14px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.shell{grid-template-columns:var(--sidebar-w) minmax(0, 1fr);min-height:100vh;transition:grid-template-columns .25s;display:grid}.sidebar{background:var(--paper-deep);border-right:1px solid var(--line);flex-direction:column;height:100vh;display:flex;position:sticky;top:0}.sidebar-brand{padding:20px 20px 14px}.sidebar-scroll{scrollbar-width:thin;flex:1;padding:4px 12px 16px;overflow-y:auto}.sidebar-foot{border-top:1px solid var(--line);flex-direction:column;gap:6px;padding:14px 20px 18px;display:flex}.brand{color:var(--ink);align-items:center;gap:10px;text-decoration:none;display:flex}.brand-text{flex-direction:column;line-height:1.1;display:flex}.brand-name{font-family:var(--font-display);letter-spacing:-.01em;font-size:1.3rem;font-weight:700}.brand-accent{color:var(--terracotta)}.brand-tag{color:var(--ink-2);margin-top:2px;font-size:.72rem}.nav-eyebrow{letter-spacing:.12em;text-transform:uppercase;color:var(--terracotta);margin:6px 8px 2px;font-size:.68rem;font-weight:700;display:block}.nav-course{color:var(--ink);font-family:var(--font-display);margin:0 8px 8px;font-size:1.05rem;font-weight:600;text-decoration:none;display:block}.nav-group{margin-top:14px}.nav-heading{letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);align-items:center;gap:6px;margin:0 8px 6px;font-size:.72rem;font-weight:700;display:flex}.nav-list{flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.nav-item{color:var(--ink);border:1px solid #0000;border-radius:10px;align-items:flex-start;gap:10px;padding:8px 10px;font-size:.9rem;line-height:1.35;text-decoration:none;transition:background .15s;display:flex}a.nav-item:hover{background:#ffffff73}.nav-item.active{background:var(--card);border-color:var(--line);box-shadow:var(--shadow-sm);font-weight:600}.nav-item.disabled{color:var(--ink-2);opacity:.6}.nav-num{background:var(--card-2);border:1px solid var(--line);width:24px;height:24px;color:var(--ink-2);border-radius:7px;flex-shrink:0;place-items:center;font-size:.75rem;font-weight:700;display:grid}.nav-item.active .nav-num{background:var(--terracotta);border-color:var(--terracotta);color:#fff8ee}.nav-num.defi{color:var(--plum)}.nav-num.ok{background:var(--green);border-color:var(--green);color:#fff}.nav-label{flex-direction:column;flex:1;gap:6px;min-width:0;padding-top:2px;display:flex}.nav-label .pbar{height:4px}.nav-back{color:var(--ink-2);align-items:center;gap:6px;margin:2px 8px 10px;font-size:.85rem;text-decoration:none;display:inline-flex}.nav-back:hover{color:var(--ink)}.nav-chapter{background:var(--card);border:1px solid var(--line);color:var(--ink);box-shadow:var(--shadow-sm);border-radius:14px;align-items:center;gap:12px;padding:12px;text-decoration:none;display:flex}.nav-chapter>span{flex-direction:column;min-width:0;display:flex}.nav-chapter .nav-eyebrow{margin:0}.nav-chapter.active{border-color:var(--terracotta)}.nav-chapter-title{font-family:var(--font-display);font-size:1.05rem;font-weight:600;line-height:1.2}.nav-review{margin-top:14px}.streak{color:var(--saffron);background:var(--saffron-soft);border-radius:999px;align-self:flex-start;align-items:center;gap:6px;padding:4px 12px 4px 10px;font-size:.85rem;font-weight:600;display:inline-flex}.shell-main{flex-direction:column;min-width:0;display:flex}.topbar{z-index:20;backdrop-filter:blur(10px)saturate(1.2);border-bottom:1px solid var(--line);background:#f3ebdde0;align-items:center;gap:12px;min-height:60px;padding:10px 40px;display:flex;position:sticky;top:0}.icon-btn{border:1px solid var(--line);background:var(--card);cursor:pointer;border-radius:11px;place-items:center;width:42px;height:42px;display:grid}.topbar-brand{line-height:0}.topbar .menu-btn,.topbar .topbar-brand,.topbar .streak-top{display:none}.collapse-btn{color:var(--ink-2);width:38px;height:38px}.collapse-btn:hover{color:var(--ink);background:var(--card-2)}.crumbs{align-items:center;gap:8px;min-width:0;font-size:.9rem;display:flex}.crumbs a{color:var(--ink-2);white-space:nowrap;text-overflow:ellipsis;text-decoration:none;overflow:hidden}.crumbs a:hover{color:var(--ink)}.crumbs a+a:before{content:"›";color:var(--line-strong);margin-right:8px}.crumbs a:last-child{color:var(--ink);font-weight:600}.content{width:100%;max-width:1240px;padding:32px 40px 96px}.scrim{z-index:40;background:#2b231d59;display:none;position:fixed;inset:0}.btn{border-radius:var(--radius-sm);border:1px solid var(--line-strong);background:var(--card);cursor:pointer;min-height:44px;color:var(--ink);justify-content:center;align-items:center;gap:8px;padding:0 18px;font-size:.95rem;font-weight:600;text-decoration:none;transition:background .15s,border-color .15s,transform 60ms,box-shadow .15s;display:inline-flex}.btn:hover:not(:disabled){background:var(--card-2);border-color:var(--ink-2)}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--blue);border-color:var(--blue);color:#fdf9f2;box-shadow:0 2px 0 var(--blue-deep)}.btn-primary:hover:not(:disabled){background:var(--blue-deep);border-color:var(--blue-deep)}.btn-ghost{color:var(--ink-2);background:0 0;border-color:#0000}.btn-ghost:hover:not(:disabled){background:var(--card-2);color:var(--ink);border-color:#0000}.btn-lg{min-height:50px;padding:0 22px;font-size:1rem}.btn-small{min-height:36px;padding:0 12px;font-size:.875rem}.btn-block{width:100%;margin-top:14px}.btn.danger{color:var(--red);align-self:flex-start}.row-actions{flex-wrap:wrap;gap:8px;margin-top:8px;display:flex}.hero-actions{flex-wrap:wrap;gap:10px;margin-top:22px;display:flex}.hero-actions.center{justify-content:center}.link{font-weight:600;text-decoration:none}.pbar{background:var(--paper-deep);border-radius:99px;height:6px;overflow:hidden}.pbar-fill{border-radius:99px;height:100%;transition:width .4s}.lvl-nouveau,.lvl-debutant{background:var(--saffron);stroke:var(--saffron)}.lvl-progres{background:var(--blue);stroke:var(--blue)}.lvl-maitrise{background:var(--green);stroke:var(--green)}.ring{flex-shrink:0}.ring-track{fill:var(--card);stroke:var(--paper-deep)}.ring-fill{fill:none;stroke-linecap:round;background:0 0;transition:stroke-dashoffset .6s}.ring-text{font-family:var(--font-display);fill:var(--ink);font-weight:700}.ring-label{fill:var(--ink-2);font-weight:500}.level{white-space:nowrap;border-radius:99px;padding:3px 9px;font-size:.72rem;font-weight:700}.level-nouveau{background:var(--paper-deep);color:var(--ink-2)}.level-debutant{background:var(--saffron-soft);color:var(--saffron)}.level-progres{background:var(--blue-soft);color:var(--blue)}.level-maitrise{background:var(--green-soft);color:var(--green)}.home-hero{grid-template-columns:minmax(0,1fr) 320px;align-items:center;gap:28px;padding:12px 0 8px;display:grid}.home-hero .display{margin-bottom:16px;font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.05}.home-stats{flex-direction:column;align-items:center;gap:18px;padding:26px;display:flex}.stat-list{text-align:center;grid-template-columns:repeat(3,1fr);gap:8px;width:100%;margin:0;padding:0;list-style:none;display:grid}.stat-list strong{font-family:var(--font-display);font-size:1.6rem;line-height:1.1;display:block}.stat-list span{color:var(--ink-2);font-size:.75rem;line-height:1.25;display:block}.steps-row{grid-template-columns:repeat(3,1fr);gap:14px;margin-top:32px;display:grid}.step-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.step-card h3{font-family:var(--font-display);margin:12px 0 4px;font-size:1.15rem;font-weight:600}.step-card p{color:var(--ink-2);margin:0;font-size:.92rem}.step-icon{border-radius:12px;place-items:center;width:40px;height:40px;display:grid}.tone-blue{background:var(--blue-soft);color:var(--blue)}.tone-terracotta{background:var(--terracotta-soft);color:var(--terracotta)}.tone-green{background:var(--green-soft);color:var(--green)}.chapter-grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;display:grid}.chapter-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);min-height:140px;color:var(--ink);box-shadow:var(--shadow-sm);flex-direction:column;gap:6px;padding:18px;text-decoration:none;transition:border-color .15s,transform .15s,box-shadow .15s;display:flex;position:relative}a.chapter-card:hover{border-color:var(--terracotta);box-shadow:var(--shadow);transform:translateY(-2px)}.chapter-card .pbar{margin-top:auto}.chapter-card.soon{border-style:dashed;border-color:var(--line-strong);box-shadow:none;color:var(--ink-2);background:#fdf9f273}.chapter-num{font-family:var(--font-display);color:var(--terracotta);font-size:1.5rem;font-weight:700;line-height:1}.chapter-card.soon .chapter-num{color:var(--line-strong)}.chapter-name{font-size:1rem;font-weight:600;line-height:1.3}.chapter-meta{color:var(--ink-2);flex-wrap:wrap;align-items:center;gap:8px;font-size:.83rem;display:flex}.soon-tag{align-items:center;gap:4px;margin-top:auto;font-size:.78rem;display:inline-flex}.validated,.status-tag.ok{color:var(--green);background:var(--green-soft);border-radius:99px;padding:2px 9px;font-size:.75rem;font-weight:700}.page-hero{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:24px;padding:28px 32px;display:grid;position:relative;overflow:hidden}.page-hero:after{content:"";background:radial-gradient(circle, var(--terracotta-soft), transparent 70%);pointer-events:none;border-radius:50%;width:240px;height:240px;position:absolute;top:-60px;right:-60px}.page-hero-text{z-index:1;position:relative}.page-hero-score{z-index:1;flex-direction:column;align-items:center;gap:8px;display:flex;position:relative}.status-tag{color:var(--ink-2);text-align:center;font-size:.8rem}.section-head{justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:20px;display:flex}.section-head .display{margin-bottom:6px}.two-col,.with-aside{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:28px;display:grid}.col-main{min-width:0}.col-side{flex-direction:column;gap:14px;display:flex}.two-col>.col-side{margin-top:36px}.sticky-side{scrollbar-width:thin;max-height:calc(100vh - 100px);position:sticky;top:80px;overflow-y:auto}.section-list{gap:10px;margin:0;padding:0;list-style:none;display:grid}.section-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);box-shadow:var(--shadow-sm);align-items:center;gap:16px;padding:16px 18px;text-decoration:none;transition:border-color .15s,box-shadow .15s;display:flex}.section-card:hover{border-color:var(--terracotta);box-shadow:var(--shadow)}.section-index{background:var(--terracotta-soft);width:42px;height:42px;color:var(--terracotta);font-family:var(--font-display);border-radius:12px;flex-shrink:0;place-items:center;font-size:1.15rem;font-weight:700;display:grid}.section-body{flex-direction:column;flex:1;gap:4px;min-width:0;display:flex}.section-name{font-size:1.02rem;font-weight:600}.section-summary{color:var(--ink-2);margin-bottom:4px;font-size:.875rem}.section-side{flex-direction:column;flex-shrink:0;align-items:flex-end;gap:6px;display:flex}.problem-grid{grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;display:grid}.problem-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);box-shadow:var(--shadow-sm);flex-direction:column;gap:6px;padding:16px;text-decoration:none;transition:border-color .15s;display:flex}.problem-card:hover{border-color:var(--plum)}.problem-card .pbar{margin-top:auto}.problem-top{justify-content:space-between;align-items:center;display:flex}.done-mark{background:var(--green);color:#fff;border-radius:50%;place-items:center;width:22px;height:22px;display:grid}.problem-name{font-family:var(--font-display);font-size:1.08rem;font-weight:600;line-height:1.25}.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:18px}.panel-title{font-family:var(--font-display);justify-content:space-between;align-items:baseline;margin:0 0 14px;font-size:1.1rem;font-weight:600;display:flex}.skill-list,.mistake-list{gap:11px;margin:0;padding:0;list-style:none;display:grid}.skill-row{justify-content:space-between;gap:8px;margin-bottom:4px;font-size:.86rem;display:flex}.skill-score{color:var(--ink-2);font-variant-numeric:tabular-nums}.mistake-list li{border-left:3px solid var(--red);padding:2px 0 2px 12px}.mistake-head{justify-content:space-between;gap:8px;font-size:.92rem;display:flex}.count{color:var(--red);font-size:.85rem;font-weight:700}.programme summary{cursor:pointer;margin:0;list-style:none}.programme summary::-webkit-details-marker{display:none}.programme summary:after{content:"+";font-family:var(--font-body);color:var(--ink-2)}.programme[open] summary:after{content:"–"}.programme[open] summary{margin-bottom:8px}.programme h3{text-transform:uppercase;letter-spacing:.08em;color:var(--terracotta);margin-top:14px;font-size:.72rem}.programme ul{margin:0;padding-left:18px;font-size:.875rem}.tabs{background:var(--paper-deep);border:1px solid var(--line);border-radius:13px;gap:4px;margin-bottom:22px;padding:4px;display:inline-flex}.tab{min-height:40px;color:var(--ink-2);cursor:pointer;background:0 0;border:0;border-radius:10px;align-items:center;gap:8px;padding:0 18px;font-weight:600;display:inline-flex}.tab.active{background:var(--card);color:var(--ink);box-shadow:var(--shadow-sm)}.tab-count{background:var(--paper-deep);color:var(--ink-2);border-radius:99px;padding:1px 7px;font-size:.75rem;font-weight:600}.lesson{flex-direction:column;gap:18px;display:flex}.rich p{margin:0 0 .65em}.rich p:last-child,.rich ul:last-child{margin-bottom:0}.rich ul{margin:0 0 .65em;padding-left:1.2em}.rich li{margin:.3em 0}.rich li::marker{color:var(--terracotta)}.math-display{-webkit-overflow-scrolling:touch;padding:6px 0;display:block;overflow:auto hidden}.math-inline .katex{white-space:nowrap}.katex{font-size:1.08em}.outline{counter-reset:o;flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.outline li{counter-increment:o}.outline a{color:var(--ink);border-radius:8px;gap:10px;padding:7px 8px;font-size:.9rem;line-height:1.35;text-decoration:none;display:flex}.outline a:before{content:counter(o, decimal-leading-zero);font-family:var(--font-display);color:var(--terracotta);padding-top:1px;font-size:.8rem;font-weight:600}.outline a:hover{background:var(--card-2)}.callout{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);--tone:var(--blue);--tone-soft:var(--blue-soft);padding:20px 22px;position:relative}.callout:before{content:"";background:var(--tone);border-radius:0 4px 4px 0;width:4px;position:absolute;top:18px;bottom:18px;left:-1px}.callout h3{font-family:var(--font-display);font-size:1.2rem;font-weight:600}.callout-label{text-transform:uppercase;letter-spacing:.1em;color:var(--tone,var(--terracotta));background:var(--tone-soft,var(--terracotta-soft));border-radius:99px;margin-bottom:10px;padding:3px 9px;font-size:.68rem;font-weight:700;display:inline-block}.callout-property{--tone:var(--teal);--tone-soft:var(--teal-soft)}.callout-method{--tone:var(--terracotta);--tone-soft:var(--terracotta-soft)}.callout-warning{--tone:var(--saffron);--tone-soft:var(--saffron-soft);background:#fbf3e2}.callout-example{--tone:var(--ink-2);--tone-soft:var(--paper-deep)}.callout-predict{--tone:var(--plum);--tone-soft:var(--plum-soft);background:#f9f0f2}.callout-play{--tone:var(--green);--tone-soft:var(--green-soft)}.callout-play .exercise-head{display:none}.callout-play .exercise{box-shadow:none;background:0 0;border:0;padding:0}.example-solution,.predict-reveal{border-top:1px dashed var(--line-strong);margin-top:14px;padding-top:14px}.lesson-end{text-align:center;background:var(--blue-soft);border-radius:var(--radius);color:var(--blue);flex-direction:column;align-items:center;gap:10px;padding:32px 20px;display:flex}.lesson-end p{color:var(--ink);margin:0}.toggles{flex-wrap:wrap;gap:10px;margin:12px 0;display:flex}.toggle{border:2px solid var(--line);background:var(--card);cursor:pointer;border-radius:99px;min-height:44px;padding:0 18px}.toggle.on{border-color:var(--green);background:var(--green-soft)}.toggle.off{border-color:var(--red);background:var(--red-soft)}.connector-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px;display:grid}.connector{border-radius:var(--radius-sm);justify-content:space-between;align-items:center;padding:10px 14px;font-weight:700;display:flex}.tv-true{background:var(--green-soft);color:var(--green)}.tv-false{background:var(--red-soft);color:var(--red)}.divisor-input{align-items:center;gap:8px;margin:8px 0 12px;font-weight:500;display:flex}.divisor-input input{width:84px}.table-scroll{-webkit-overflow-scrolling:touch;margin:6px 0;overflow-x:auto}.grid-table{border-collapse:separate;border-spacing:0;font-variant-numeric:tabular-nums;background:var(--card);border:1px solid var(--line);border-radius:12px;min-width:100%;overflow:hidden}.grid-table th,.grid-table td{text-align:center;border-bottom:1px solid var(--line);white-space:nowrap;padding:7px 12px}.grid-table tr:last-child td{border-bottom:0}.grid-table th{background:var(--card-2);font-size:.9rem;font-weight:600}.grid-table td.given{color:var(--ink-2);font-weight:600}.grid-table td.num{text-align:right;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.85rem}.grid-table .input-cell{padding:4px}.cell-btn{border:2px dashed var(--line-strong);background:var(--card);cursor:pointer;min-width:56px;min-height:40px;color:var(--ink-2);border-radius:9px;padding:0 8px;font-weight:700}.cell-btn:hover:not(:disabled){border-color:var(--blue)}.cell-btn.filled{border-style:solid;border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}.cell-btn.wrong{border-style:solid;border-color:var(--red);background:var(--red-soft);color:var(--red)}.cell-btn.correct{border-style:solid;border-color:var(--green);background:var(--green-soft);color:var(--green)}.runner{flex-direction:column;gap:14px;display:flex}.dots{scrollbar-width:none;gap:6px;padding:4px 2px 6px;display:none;overflow-x:auto}.dot{border:1.5px solid var(--line-strong);background:var(--card);cursor:pointer;width:34px;height:34px;color:var(--ink-2);border-radius:10px;flex-shrink:0;font-size:.8rem;font-weight:700}.dot.seen{border-color:var(--red);color:var(--red)}.dot.ok{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}.dot.good{border-color:var(--green);background:var(--green);color:#fff}.dot.current{outline:2.5px solid var(--terracotta);outline-offset:2px}.ex-list{flex-direction:column;gap:3px;margin:0;padding:0;list-style:none;display:flex}.ex-item{text-align:left;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:10px;align-items:center;gap:10px;width:100%;padding:8px;display:flex}.ex-item:hover{background:var(--card-2)}.ex-item.current{background:var(--blue-soft);border-color:color-mix(in srgb, var(--blue) 30%, transparent)}.ex-status{border:1.5px solid var(--line-strong);width:26px;height:26px;color:var(--ink-2);background:var(--card);border-radius:8px;flex-shrink:0;place-items:center;font-size:.75rem;font-weight:700;display:grid}.ex-item.good .ex-status{background:var(--green);border-color:var(--green);color:#fff}.ex-item.ok .ex-status{border-color:var(--blue);color:var(--blue)}.ex-item.seen .ex-status{border-color:var(--red);color:var(--red)}.ex-text{flex-direction:column;flex:1;min-width:0;line-height:1.3;display:flex}.ex-title{white-space:nowrap;text-overflow:ellipsis;font-size:.88rem;font-weight:600;overflow:hidden}.ex-sub:empty{display:none}.ex-sub{color:var(--ink-2);white-space:nowrap;text-overflow:ellipsis;font-size:.74rem;overflow:hidden}.ex-score{color:var(--ink-2);font-variant-numeric:tabular-nums;font-size:.78rem;font-weight:700}.exercise{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);flex-direction:column;gap:16px;padding:24px 26px;display:flex;position:relative}.exercise.status-solved{border-color:color-mix(in srgb, var(--green) 55%, var(--line))}.exercise-head{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.exercise-title{width:100%;font-family:var(--font-display);margin:4px 0 0;font-size:1.3rem;font-weight:600}.chip{letter-spacing:.04em;text-transform:uppercase;background:var(--blue-soft);color:var(--blue);border-radius:99px;padding:4px 10px;font-size:.7rem;font-weight:700}.chip-source{background:var(--plum-soft);color:var(--plum);text-transform:none;letter-spacing:0}.prompt{font-size:1.04rem}.statement{background:var(--card-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:6px 14px}.hint-line{color:var(--ink-2);margin:0;font-size:.85rem}.exercise-body{flex-direction:column;gap:14px;display:flex}.choices{flex-direction:column;gap:8px;display:flex}.choice{text-align:left;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--card);cursor:pointer;align-items:flex-start;gap:12px;width:100%;min-height:50px;padding:13px 16px;transition:border-color .12s,background .12s;display:flex}.choice:hover:not(:disabled){border-color:var(--blue);background:#fbf8f3}.choice:disabled{cursor:default}.choice.selected{border-color:var(--blue);background:var(--blue-soft)}.choice.correct{border-color:var(--green);background:var(--green-soft)}.choice.wrong{border-color:var(--red);background:var(--red-soft)}.choice-mark{border:2px solid var(--line-strong);width:22px;height:22px;color:var(--blue);background:var(--card);flex-shrink:0;place-items:center;margin-top:1px;font-size:11px;display:grid}.choice-mark.round{border-radius:50%}.choice-mark.square{border-radius:6px}.choice.selected .choice-mark{border-color:var(--blue)}.choice.correct .choice-mark{border-color:var(--green);color:var(--green)}.choice.wrong .choice-mark{border-color:var(--red);color:var(--red)}.choice-text{flex:1;min-width:0;overflow-x:auto}.check-bar{justify-content:flex-end;display:flex}.btn-check{min-width:160px}.seq-built{border:2px dashed var(--line-strong);border-radius:var(--radius-sm);background:var(--card-2);gap:8px;min-height:70px;padding:12px;display:flex}.seq-built.inline{flex-wrap:wrap;align-items:center}.seq-built.steps,.seq-bank.steps{flex-direction:column}.seq-built.empty{justify-content:center;align-items:center}.placeholder{color:var(--ink-2);text-align:center;font-size:.875rem}.seq-bank{gap:8px;display:flex}.seq-bank.inline{flex-wrap:wrap}.piece{border:1.5px solid var(--line-strong);border-radius:var(--radius-sm);background:var(--card);cursor:pointer;text-align:left;min-height:46px;box-shadow:0 2px 0 var(--line);align-items:flex-start;gap:10px;padding:11px 15px;transition:border-color .12s,transform 60ms;display:flex}.piece:hover:not(:disabled){border-color:var(--blue)}.piece:active:not(:disabled){transform:translateY(1px)}.piece.placed{border-color:var(--blue);background:#f6f8fc}.piece.locked{cursor:default}.piece-text{min-width:0}.steps .piece-text{overflow-x:auto}.step-num{background:var(--blue);color:#fff;border-radius:7px;flex-shrink:0;place-items:center;width:24px;height:24px;font-size:.75rem;font-weight:700;display:grid}input[type=text],input[type=number]{font:inherit;border:1.5px solid var(--line-strong);border-radius:var(--radius-sm);min-height:46px;color:var(--ink);background:#fffdf9;min-width:0;padding:0 14px}input::placeholder{color:#ab9c89}input:focus-visible,button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid color-mix(in srgb, var(--blue) 45%, transparent);outline-offset:2px}input[type=text]:focus{border-color:var(--blue)}.value-inputs{flex-direction:column;gap:10px;display:flex}.value-input{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.value-input input{width:150px}.value-label{font-weight:500}.value-domain{color:var(--ink-2)}.value-preview{color:var(--ink-2);font-size:.85rem}.value-preview.block{margin:0}.value-preview.bad{color:var(--red)}.numeric-row{align-items:center;gap:10px;display:flex}.numeric-input{flex:1;max-width:280px}.verdict-buttons{grid-template-columns:1fr 1fr;gap:10px;max-width:460px;display:grid}.verdict-btn{border:1.5px solid var(--line-strong);border-radius:var(--radius-sm);background:var(--card);min-height:54px;font-family:var(--font-display);cursor:pointer;box-shadow:0 2px 0 var(--line);font-size:1.15rem;font-weight:600}.verdict-btn:hover:not(:disabled){border-color:var(--blue)}.verdict-btn:disabled{cursor:default}.verdict-btn.correct{border-color:var(--green);background:var(--green-soft);color:var(--green)}.verdict-btn.wrong{border-color:var(--red);background:var(--red-soft);color:var(--red)}.justify{border-top:1px dashed var(--line-strong);flex-direction:column;gap:12px;padding-top:14px;display:flex}.proof-lines{counter-reset:line;flex-direction:column;gap:6px;margin:0;padding:0;list-style:none;display:flex}.proof-lines li{counter-increment:line}.proof-line{text-align:left;border:1.5px solid var(--line);border-radius:var(--radius-sm);cursor:pointer;background:#fffdf9;align-items:flex-start;gap:12px;width:100%;min-height:46px;padding:11px 14px;display:flex;overflow-x:auto}.proof-line:before{content:counter(line);color:var(--terracotta);font-family:var(--font-display);border-right:1.5px solid var(--terracotta-soft);min-width:18px;margin-right:2px;padding-right:10px;font-size:.85rem;font-weight:700}.proof-text{min-width:0}.proof-line:hover:not(:disabled){border-color:var(--saffron)}.proof-line:disabled{cursor:default}.proof-line.selected{border-color:var(--saffron);background:var(--saffron-soft)}.proof-line.error{border-color:var(--red);background:var(--red-soft)}.proof-line.cleared{opacity:.5}.game-rules{color:var(--ink-2);margin:0 0 4px;font-size:.92rem}.game-truth{margin:0}.game-roles{grid-template-columns:1fr 1fr;gap:10px;display:grid}.game-roles .game-rules{grid-column:1/-1}.role-card{text-align:left;border:1.5px solid var(--line-strong);border-radius:var(--radius-sm);background:var(--card);cursor:pointer;box-shadow:0 2px 0 var(--line);flex-direction:column;gap:4px;padding:16px 18px;display:flex}.role-card:hover{border-color:var(--blue);background:var(--blue-soft)}.role-title{font-family:var(--font-display);font-size:1.1rem;font-weight:600}.role-sub{color:var(--ink-2);font-size:.875rem}.game-board{flex-direction:column;gap:10px;display:flex}.game-you{margin:0}.game-moves{gap:6px;margin:0;padding:0;list-style:none;display:grid}.game-move{border-radius:var(--radius-sm);background:var(--card-2);border:1.5px solid var(--line);grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:12px;padding:11px 14px;display:grid}.game-move.current{border-color:var(--blue);background:#fffdf9}.move-who{color:var(--ink-2);text-transform:uppercase;letter-spacing:.08em;font-size:.7rem;font-weight:700}.move-value{text-align:right;min-width:70px}.thinking{color:var(--ink-2);font-size:.85rem;font-style:italic}.game-input{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.game-result{border-radius:var(--radius-sm);padding:13px 16px}.game-result p{margin:0}.game-result.win{background:var(--green-soft)}.game-result.lose{background:var(--red-soft)}.hints{flex-direction:column;gap:8px;display:flex}.hint{background:var(--saffron-soft);border-radius:var(--radius-sm);padding:12px 16px}.hint-label,.tip-label{text-transform:uppercase;letter-spacing:.08em;margin-bottom:4px;font-size:.7rem;font-weight:700;display:block}.hint-label{color:var(--saffron)}.feedback{border-radius:var(--radius-sm);padding:14px 16px;animation:.2s ease-out pop}@keyframes pop{0%{opacity:.3;transform:translateY(4px)}}.feedback p{margin:0}.feedback-title{font-family:var(--font-display);align-items:center;gap:8px;margin-bottom:4px;font-size:1.08rem;font-weight:600;display:flex}.feedback-icon{color:#fff;border-radius:50%;place-items:center;width:22px;height:22px;display:grid}.feedback-error{background:var(--red-soft)}.feedback-error .feedback-title{color:var(--red)}.feedback-error .feedback-icon{background:var(--red)}.feedback-success{background:var(--green-soft)}.feedback-success .feedback-title{color:var(--green)}.feedback-success .feedback-icon{background:var(--green)}.feedback-info{background:var(--blue-soft)}.misconception-tip{background:var(--card);border-left:3px solid var(--saffron);border-radius:10px;margin-top:12px;padding:12px 14px;font-size:.93rem}.misconception-tip .tip-label{color:var(--saffron)}.misconception-tip a{margin-top:6px;font-size:.85rem;font-weight:600;display:inline-block}.score-line{color:var(--green);font-size:.9rem;font-weight:700;margin-top:4px!important}.explanation{background:var(--card-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px}.explanation .tip-label{color:var(--terracotta)}.exercise-foot{border-top:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:6px;padding-top:14px;display:flex}.exercise-foot:has(>.spacer:only-child){display:none}.spacer{flex:1}.nav-buttons{gap:8px;display:flex}.problem-layout{grid-template-columns:360px minmax(0,1fr);align-items:start;gap:28px;display:grid}.problem-side{flex-direction:column;gap:18px;max-height:calc(100vh - 100px);display:flex;position:sticky;top:80px;overflow-y:auto}.problem-main{min-width:0}.statement-card{background:var(--card);border:1px solid var(--line);border-top:4px solid var(--plum);border-radius:var(--radius);box-shadow:var(--shadow-sm);--tone:var(--plum);--tone-soft:var(--plum-soft);padding:18px 20px}.step-track{flex-direction:column;margin:0;padding:0 4px;list-style:none;display:flex}.step-track-item{align-items:center;gap:12px;padding:7px 0;font-size:.9rem;display:flex;position:relative}.step-track-item:not(:last-child):after{content:"";background:var(--line-strong);width:2px;height:calc(100% - 28px);position:absolute;top:35px;left:13px}.step-dot{border:2px solid var(--line-strong);background:var(--card);width:28px;height:28px;color:var(--ink-2);z-index:1;border-radius:50%;flex-shrink:0;place-items:center;font-size:.78rem;font-weight:700;display:grid}.step-track-item.done .step-dot{background:var(--green);border-color:var(--green);color:#fff}.step-track-item.current .step-dot{border-color:var(--blue);color:var(--blue)}.step-track-item.current{font-weight:600}.step-track-item.locked{opacity:.55}.checkpoints{flex-direction:column;gap:16px;margin:0;padding:0;list-style:none;display:flex}.checkpoint.locked{border:1.5px dashed var(--line-strong);border-radius:var(--radius);color:var(--ink-2);align-items:center;gap:10px;padding:16px 20px;font-size:.92rem;display:flex}.summary-card{text-align:center;flex-direction:column;align-items:center;gap:10px;margin-top:22px;padding:36px 24px;display:flex}.summary-card p{max-width:54ch;margin:0}.writeup{text-align:left;border:1px solid var(--line);border-left:3px solid var(--terracotta);border-radius:var(--radius-sm);background:#fffdf9;width:100%;padding:18px 20px}@media (width<=1240px){.with-aside{grid-template-columns:minmax(0,1fr)}.with-aside>.col-side{display:none}.dots{display:flex}.content{max-width:920px}}@media (width<=1023px){.shell{grid-template-columns:minmax(0,1fr)}.sidebar{z-index:50;width:min(320px,86vw);transition:transform .25s;position:fixed;top:0;bottom:0;left:0;transform:translate(-102%);box-shadow:8px 0 30px #2b231d33}html[data-drawer=open] .sidebar{transform:none}.topbar{padding:8px 20px}.topbar .menu-btn,.topbar .topbar-brand{display:grid}.topbar .collapse-btn{display:none}.topbar .streak-top{margin-left:auto;display:inline-flex}.content{margin:0 auto;padding:24px 20px 80px}.two-col{grid-template-columns:minmax(0,1fr)}.two-col>.col-side{margin-top:8px}.problem-layout{grid-template-columns:minmax(0,1fr);gap:16px}.problem-side{max-height:none;position:static}.step-track{display:none}.home-hero{grid-template-columns:minmax(0,1fr)}.home-stats{flex-direction:row;padding:18px}}@media (width<=640px){body{background-size:22px 22px}.content{padding:18px 14px 72px}.topbar{gap:10px;padding:8px 14px}.crumbs a:not(:last-child),.crumbs a+a:before{display:none}.page-hero{grid-template-columns:minmax(0,1fr);padding:22px 18px}.page-hero-score{flex-direction:row;order:-1;justify-content:flex-start}.page-hero-score .ring{width:72px;height:72px}.hero-actions .btn{flex:100%}.steps-row{grid-template-columns:minmax(0,1fr);gap:8px}.step-card{grid-template-columns:40px minmax(0,1fr);column-gap:12px;padding:14px;display:grid}.step-card h3{align-self:center;margin:0}.step-card p{grid-column:2}.step-icon{grid-row:span 2}.home-stats{gap:12px}.home-stats .ring{width:84px;height:84px}.stat-list strong{font-size:1.3rem}.chapter-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.chapter-card{min-height:120px;padding:14px}.section-card{gap:12px;padding:14px}.section-side{display:none}.section-head .ring{width:64px;height:64px}.tabs{display:flex}.tab{flex:1;justify-content:center;padding:0 10px}.exercise{padding:18px 16px}.exercise-title{font-size:1.15rem}.check-bar .btn,.nav-buttons{width:100%}.nav-buttons .btn{flex:1}.game-roles{grid-template-columns:minmax(0,1fr)}.game-move{grid-template-columns:minmax(0,1fr) auto}.move-who{display:none}.grid-table th,.grid-table td{padding:5px 7px}.cell-btn{min-width:46px;font-size:.85rem}.callout{padding:18px 16px}}@media (width>=1024px){html[data-sidebar=collapsed] .shell{grid-template-columns:0 minmax(0,1fr)}html[data-sidebar=collapsed] .sidebar{visibility:hidden;border-right:0;overflow:hidden}html[data-sidebar=collapsed] .topbar .topbar-brand{display:grid}html[data-sidebar=collapsed] .content{margin:0 auto}}a.tab{text-decoration:none}.title-link{color:inherit;text-decoration:none}.title-link:hover{color:var(--terracotta)}.foot-stats{flex-wrap:wrap;gap:6px;display:flex}.goal{color:var(--blue);background:var(--blue-soft);border-radius:999px;align-items:center;gap:5px;padding:4px 10px;font-size:.8rem;font-weight:600;display:inline-flex}.goal.done{color:var(--green);background:var(--green-soft)}.btn-block-soft{background:var(--card);width:100%}.account-chip{color:var(--ink);border-radius:12px;align-items:center;gap:10px;padding:6px;text-decoration:none;display:flex}.account-chip:hover{background:var(--card)}.account-name{white-space:nowrap;text-overflow:ellipsis;font-size:.9rem;font-weight:600;overflow:hidden}.avatar{background:var(--terracotta);color:#fff8ee;width:32px;height:32px;font-family:var(--font-display);border-radius:50%;flex-shrink:0;place-items:center;font-weight:700;text-decoration:none;display:grid}.topbar-right{align-items:center;gap:8px;margin-left:auto;display:flex}.topbar .avatar-top,.topbar .login-top{display:none}@media (width<=1023px){.topbar .avatar-top{display:grid}.topbar .login-top{display:inline-flex}.topbar .streak-top{margin-left:0}}.save-prompt{background:var(--saffron-soft);border:1px solid color-mix(in srgb, var(--saffron) 30%, transparent);border-radius:var(--radius);align-items:center;gap:12px;margin-bottom:14px;padding:12px 14px;display:flex}.save-icon{background:var(--card);width:36px;height:36px;color:var(--saffron);border-radius:10px;flex-shrink:0;place-items:center;display:grid}.save-text{flex:1;font-size:.92rem}.save-close{background:0 0;border-color:#0000;width:34px;height:34px}.auth-card{text-align:center;flex-direction:column;align-items:stretch;gap:12px;max-width:420px;margin:24px auto;padding:32px 28px;display:flex}.auth-card .brand-mark{align-self:center}.auth-card h1{margin:4px 0 0}.auth-card>p{margin:0 0 8px}.btn-google{background:#fff;gap:10px}.auth-error{color:var(--red);margin:0;font-size:.9rem}.account-stats{margin:16px 0 0;padding:18px;list-style:none}.all-corriges{margin-top:28px}.all-corriges>summary{cursor:pointer;margin:0;list-style:none}.all-corriges>summary::-webkit-details-marker{display:none}.all-corriges>summary:after{content:"+";font-family:var(--font-body);color:var(--ink-2)}.all-corriges[open]>summary:after{content:"–"}.corrige-list{flex-direction:column;gap:18px;margin:14px 0 0;padding-left:1.4em;display:flex}.corrige-item::marker{font-family:var(--font-display);color:var(--terracotta);font-weight:700}.corrige-item h3{margin:0 0 4px;font-size:1rem}.corrige-item details{margin-top:6px}.corrige-item summary{cursor:pointer;color:var(--blue);font-size:.9rem;font-weight:600}.lesson-end{padding:24px 20px}.ex-title .katex{font-size:.95em}html[data-drawer=open] .scrim{display:block}@media (width>=1024px){html[data-drawer=open] .scrim{display:none}}.sidebar>astro-island,.topbar>astro-island{display:contents}.gamebar{flex-shrink:0;align-items:center;gap:8px;margin-left:auto;display:flex}.stat-chip{white-space:nowrap;border-radius:999px;align-self:auto;align-items:center;gap:6px;height:34px;padding:0 12px;font-size:.85rem;font-weight:600;display:inline-flex}.stat-chip strong{font-family:var(--font-display);font-size:1rem}.stat-label{font-weight:500}.gamebar .avatar{width:34px;height:34px}.btn-save .save-short{display:none}.home-title{margin:8px 0 22px;font-size:clamp(1.7rem,3.4vw,2.3rem)}.filiere-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;display:grid}.filiere-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);min-height:150px;color:var(--ink);box-shadow:var(--shadow-sm);flex-direction:column;gap:8px;padding:20px;text-decoration:none;transition:border-color .15s,transform .15s,box-shadow .15s;display:flex}a.filiere-card:hover{border-color:var(--terracotta);box-shadow:var(--shadow);transform:translateY(-2px)}.filiere-card .pbar{margin-top:auto}.filiere-card.mine{border:2px solid var(--terracotta)}.filiere-card.soon{border-style:dashed;border-color:var(--line-strong);box-shadow:none;color:var(--ink-2);background:#fdf9f273}.filiere-country{letter-spacing:.1em;text-transform:uppercase;color:var(--terracotta);align-items:center;gap:8px;font-size:.72rem;font-weight:700;display:flex}.filiere-card.soon .filiere-country{color:var(--ink-2)}.filiere-name{font-family:var(--font-display);font-size:1.3rem;font-weight:600;line-height:1.2}.mine-tag{letter-spacing:0;text-transform:none;color:#fff8ee;background:var(--terracotta);border-radius:99px;align-self:flex-start;padding:2px 8px;font-size:.72rem;font-weight:700}@media (width<=640px){.stat-chip{gap:4px;padding:0 10px}.stat-chip .stat-label,.btn-save .save-long{display:none}.btn-save .save-short{display:inline}.filiere-card{min-height:0}}@media (width<=480px){.crumbs{display:none}}.chapter-head{align-items:center;gap:20px;margin-bottom:26px;display:flex}.chapter-head-text{flex:1;min-width:0}.chapter-head-text .display{margin:0 0 2px}.chapter-head-text p{margin:0}.chapter-head-actions{flex-wrap:wrap;gap:8px;display:flex}.lesson-rows{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);margin:0;padding:0;list-style:none}.lesson-row{padding:16px 20px}.lesson-row+.lesson-row{border-top:1px solid var(--line)}.lesson-row-head{align-items:center;gap:14px;display:flex}.section-index.ok{background:var(--green);color:#fff}.lesson-row-title{color:var(--ink);flex:1;font-size:1.05rem;font-weight:600;text-decoration:none}.lesson-row-title:hover{color:var(--terracotta)}.lesson-row-score{font-family:var(--font-display);color:var(--ink-2);font-weight:700}.lesson-row-body{flex-wrap:wrap;align-items:center;gap:10px 14px;margin:10px 0 0 56px;display:flex}.course-link{background:var(--blue-soft);height:32px;color:var(--blue);border-radius:99px;align-items:center;gap:6px;padding:0 12px;font-size:.85rem;font-weight:600;text-decoration:none;display:inline-flex}.course-link:hover{background:var(--blue);color:#fdf9f2}.ex-dots{flex-wrap:wrap;gap:6px;display:flex}.ex-dot{border:1.5px solid var(--line-strong);background:var(--card);width:32px;height:32px;color:var(--ink-2);border-radius:50%;place-items:center;font-size:.78rem;font-weight:700;text-decoration:none;transition:transform .1s,border-color .1s;display:grid}.ex-dot:hover{border-color:var(--blue);transform:scale(1.1)}.ex-dot.good{background:var(--green);border-color:var(--green);color:#fff}.ex-dot.ok{background:var(--blue-soft);border-color:var(--blue);color:var(--blue)}.ex-dot.seen{border-color:var(--red);color:var(--red)}.ex-dot.defi,.dot.defi{border-color:var(--plum);color:var(--plum);background:var(--plum-soft);border-radius:10px}.ex-dot.defi.good,.dot.defi.good{background:var(--plum);color:#fff}.dot.defi{place-items:center;display:grid}.coming-soon{border:1.5px dashed var(--line-strong);border-radius:var(--radius);color:var(--ink-2);align-items:center;gap:10px;margin-top:14px;padding:14px 18px;display:flex}.panel-subtitle{text-transform:uppercase;letter-spacing:.08em;color:var(--plum);margin:16px 0 6px;font-size:.72rem}a.ex-item{color:var(--ink);text-decoration:none}.ex-item.defi .ex-status{border-color:var(--plum);color:var(--plum);background:var(--plum-soft);border-radius:8px}.ex-item.defi.good .ex-status{background:var(--plum);color:#fff}.callout-analogy{--tone:var(--saffron);--tone-soft:var(--saffron-soft);background:#fdf6e7}.callout-exam{--tone:var(--blue);--tone-soft:var(--blue-soft);background:#f5f7fc}.callout-label{align-items:center;gap:5px;display:inline-flex}.exam-answer{border:1px solid color-mix(in srgb, var(--blue) 25%, transparent);border-left:3px solid var(--blue);border-radius:var(--radius-sm);background:#f5f7fc;padding:14px 16px}.exam-answer .tip-label{color:var(--blue);align-items:center;gap:5px;display:flex}.feedback-link{color:#5865f2;border-radius:10px;align-items:center;gap:8px;padding:8px 10px;font-size:.9rem;font-weight:600;text-decoration:none;display:flex}.feedback-link:hover{background:var(--card)}@media (width<=640px){.chapter-head{flex-wrap:wrap;gap:14px}.chapter-head .ring{width:64px;height:64px}.chapter-head-actions{width:100%}.chapter-head-actions .btn{flex:1}.lesson-row{padding:14px}.lesson-row-body{margin-left:0}}.callout-visual{--tone:var(--teal);--tone-soft:var(--teal-soft)}.visual{flex-direction:column;gap:12px;display:flex}.visual-svg{user-select:none;border-radius:12px;width:100%;max-width:560px;height:auto;margin:0 auto;display:block}.visual-controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px 16px;display:flex}.visual-controls.column{flex-direction:column;align-items:flex-start}.seg{align-items:center;gap:8px;display:inline-flex}.seg-label{font-size:.9rem;font-weight:600}.seg-options{background:var(--paper-deep);border-radius:10px;padding:3px;display:inline-flex}.seg-options button{min-height:34px;color:var(--ink-2);cursor:pointer;background:0 0;border:0;border-radius:8px;padding:0 12px;font-size:.85rem;font-weight:600}.seg-options button.on{background:var(--card);color:var(--ink);box-shadow:var(--shadow-sm)}.visual-chips{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.chip-btn{border:1.5px solid var(--line-strong);background:var(--card);cursor:pointer;border-radius:99px;min-height:38px;padding:0 14px}.chip-btn.on{border-color:var(--blue);background:var(--blue-soft)}.visual-verdict{text-align:center;background:var(--card-2);border-radius:10px;margin:0;padding:8px 12px;font-weight:600}.visual-verdict.good{background:var(--green-soft);color:var(--green)}.visual-verdict.bad{background:var(--red-soft);color:var(--red)}.visual-caption{text-align:center;color:var(--ink-2);margin:0;font-size:.88rem}.legend{font-weight:700}.legend.p{color:var(--terracotta)}.legend.q{color:var(--teal)}.mini-table{width:auto;min-width:0;margin:0 auto;font-size:.85rem}.mini-table tr.current td{box-shadow:inset 0 2px 0 var(--blue), inset 0 -2px 0 var(--blue);font-weight:800}.rain-drops{animation:.7s linear infinite rain}@keyframes rain{0%{opacity:.4;transform:translateY(-6px)}to{opacity:1;transform:translateY(10px)}}@media (prefers-reduced-motion:reduce){.rain-drops{animation:none}}.venn-universe{fill:var(--ink-2);font-size:12px;font-weight:700}.venn-label{font-family:var(--font-display);font-size:22px;font-style:italic;font-weight:700}.classroom .student{cursor:pointer;outline:none}.classroom .student:hover circle,.classroom .student:focus-visible circle{stroke:var(--blue);stroke-width:2px}.no-pen{fill:var(--red);font-size:14px;font-weight:700}.statement-list{flex-direction:column;gap:6px;margin:0 auto;padding:0;list-style:none;display:flex}.statement-list li{align-items:center;gap:10px;display:flex}.tv-badge{border-radius:7px;place-items:center;width:26px;height:26px;font-size:.85rem;font-weight:800;display:grid}.step-label{fill:var(--ink-2);font-size:10px;font-weight:700}.walker{transition:transform .33s}.check{cursor:pointer;align-items:center;gap:8px;font-size:.92rem;display:flex}.check input{width:18px;height:18px;accent-color:var(--blue)}.slider{justify-content:center;align-items:center;gap:12px;display:flex}.slider input{width:min(320px,70%);accent-color:var(--terracotta)}.zone-label{fill:var(--red);font-size:11px;font-weight:700}.axis-label{fill:var(--ink-2);font-size:11px}.curve-label{font-size:13px;font-weight:700}.chapter-body{flex-direction:column;gap:14px;max-width:860px;display:flex}.chapter-body .coming-soon{margin-top:0}.chapter-head{max-width:860px}