@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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)format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.16.47"}.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;--page:#fff;--surface:#f6f6f4;--surface-strong:#efefec;--ink:#25231f;--ink-soft:#66625b;--ink-faint:#8a867f;--line:#deddd8;--line-strong:#c9c7c0;--accent:#bc5b41;--accent-soft:#f7eae5;--success:#3f705b;--success-soft:#edf4f0;--danger:#9a4a3d;--radius:7px;--card-radius:8px;--header-height:58px;font-synthesis:none;letter-spacing:0;font-family:Inter,SF Pro Text,PingFang SC,Microsoft YaHei,Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 24px)}body{background:var(--page);min-width:320px;min-height:100vh;color:var(--ink);-webkit-font-smoothing:antialiased;margin:0}button,input{font:inherit;letter-spacing:0}button{color:inherit}button:focus-visible,input:focus-visible,[tabindex="0"]:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button,summary{-webkit-tap-highlight-color:transparent}.app{min-height:100vh}.app-header{z-index:50;height:var(--header-height);border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffffff5;grid-template-columns:minmax(230px,1fr) auto minmax(230px,1fr);align-items:center;gap:24px;padding:0 28px;display:grid;position:sticky;top:0}.brand-lockup{white-space:nowrap;align-items:center;gap:10px;min-width:0;display:flex}.sdu-study-brand{align-items:center;gap:9px;min-width:0;display:inline-flex}.sdu-logo-shell{background:var(--page);flex:none;justify-content:center;align-items:center;width:126px;height:42px;padding:4px 2px;display:inline-flex;overflow:hidden}.sdu-logo{object-fit:contain;filter:brightness(0);width:100%;height:100%;display:block}.sdu-custom-copy{flex-direction:column;gap:2px;min-width:0;line-height:1.1;display:flex}.sdu-custom-title{color:var(--ink);text-overflow:ellipsis;font-size:12px;font-weight:680;overflow:hidden}.sdu-custom-copy small{color:var(--ink-faint);font-size:10px;font-weight:520}.chapter-switcher-trigger span{color:var(--ink-soft);flex:none;font-size:13px}.chapter-switcher{position:relative}.chapter-switcher-trigger{cursor:pointer;background:0 0;border:0;border-radius:6px;align-items:center;gap:6px;min-height:34px;padding:0 8px;display:inline-flex}.chapter-switcher-trigger:hover,.chapter-switcher-trigger[aria-expanded=true]{background:var(--surface)}.chapter-switcher-trigger svg{color:var(--ink-faint);transition:transform .16s}.chapter-switcher-trigger svg.expanded{transform:rotate(180deg)}.chapter-menu{z-index:80;width:330px;max-height:min(620px, calc(100vh - var(--header-height) - 18px));border:1px solid var(--line);background:var(--page);border-radius:8px;padding:6px;position:absolute;top:calc(100% + 8px);left:0;overflow-y:auto;box-shadow:0 14px 34px #25231f1f}.chapter-menu button{width:100%;min-height:46px;color:var(--ink-soft);text-align:left;cursor:pointer;background:0 0;border:0;border-radius:6px;grid-template-columns:54px minmax(0,1fr) auto;align-items:center;gap:10px;padding:7px 9px;display:grid}.chapter-menu button:hover,.chapter-menu button.active{background:var(--accent-soft);color:var(--accent)}.chapter-menu button.unavailable{color:var(--ink-faint);cursor:default;opacity:.56}.chapter-menu button.unavailable:hover{color:var(--ink-faint);background:0 0}.chapter-menu button small{color:inherit;white-space:nowrap;font-size:10px;font-weight:500}.chapter-menu button span{font-size:11px}.chapter-menu button strong{font-size:13px;font-weight:620}.mode-navigation{align-items:stretch;height:100%;display:flex}.mode-navigation button{min-width:84px;color:var(--ink-soft);cursor:pointer;background:0 0;border:0;justify-content:center;align-items:center;gap:7px;padding:0 13px;font-size:13px;font-weight:570;transition:color .16s,background .16s;display:inline-flex;position:relative}.mode-navigation button:after{content:"";background:0 0;height:2px;position:absolute;bottom:-1px;left:14px;right:14px}.mode-navigation button:hover{color:var(--ink);background:var(--surface)}.mode-navigation button.active{color:var(--accent)}.mode-navigation button.active:after{background:var(--accent)}.header-actions{justify-content:flex-end;align-items:center;gap:8px;min-width:0;display:flex}.header-action,.icon-button,.source-link,.completion-toggle,.answer-toggle,.section-read-button{border:1px solid var(--line);background:var(--page);cursor:pointer;border-radius:6px;transition:border-color .16s,background .16s,color .16s}.header-action{height:32px;color:var(--ink-soft);align-items:center;gap:7px;padding:0 10px;font-size:12px;display:inline-flex}.header-action:hover,.icon-button:hover,.source-link:hover{border-color:var(--line-strong);background:var(--surface);color:var(--ink)}.header-action:disabled,.mobile-menu-button:disabled{opacity:.4;cursor:not-allowed}.icon-button{width:32px;height:32px;color:var(--ink-soft);flex:none;place-items:center;padding:0;display:inline-grid}.header-progress{color:var(--ink-faint);white-space:nowrap;padding:0 6px;font-size:12px}.mobile-menu-button,.mobile-mode-nav{display:none}.reader-shell{grid-template-columns:224px minmax(0,800px) minmax(48px,220px);justify-content:center;align-items:start;gap:clamp(28px,3.2vw,52px);width:min(100%,1480px);margin:0 auto;padding:0 30px 100px;display:grid}.chapter-outline{top:calc(var(--header-height) + 24px);max-height:calc(100vh - var(--header-height) - 48px);scrollbar-width:thin;padding:2px 4px 32px 0;position:sticky;overflow:auto}.outline-label{color:var(--ink-faint);margin:0 0 12px 12px;font-size:11px;font-weight:650;display:block}.outline-section{margin-bottom:3px}.outline-section button{cursor:pointer;background:0 0;border:0;width:100%}.outline-section-button{min-height:38px;color:var(--ink-soft);text-align:left;grid-template-columns:36px minmax(0,1fr) 8px 16px;align-items:center;gap:4px;padding:7px 8px 7px 10px;transition:background .16s,color .16s;display:grid;border-radius:6px!important}.outline-section-button>span{font-variant-numeric:tabular-nums;font-size:11px}.outline-section-button strong{overflow-wrap:anywhere;font-size:13px;font-weight:610}.outline-section-button i{background:var(--success);border-radius:50%;width:6px;height:6px}.outline-section-button svg{transition:transform .16s}.outline-section-button svg.expanded{transform:rotate(180deg)}.outline-section-button:hover{background:var(--surface);color:var(--ink)}.outline-section-button.active{background:var(--accent-soft);color:var(--accent)}.outline-groups{border-left:1px solid var(--line);margin:4px 0 7px 18px;padding-left:12px}.outline-groups button{color:var(--ink-faint);text-align:left;padding:7px 8px;font-size:11px;line-height:1.45;transition:color .16s;display:block}.outline-groups button span{color:inherit;margin-bottom:2px;font-size:10px;display:block}.outline-groups button b{overflow-wrap:anywhere;font-weight:520;display:block}.outline-groups button:hover,.outline-groups button.active{color:var(--accent)}.reading-column{min-width:0}.chapter-heading{border-bottom:1px solid var(--line);padding:54px 0 58px}.chapter-heading p{color:var(--accent);margin:0 0 12px;font-size:16px;font-weight:680}.chapter-heading h1{margin:0;font-size:32px;font-weight:670;line-height:1.22}.chapter-heading span{color:var(--ink-soft);margin-top:14px;font-size:15px;line-height:1.6;display:block}.reading-section{scroll-margin-top:calc(var(--header-height) + 20px);border-bottom:1px solid var(--line);padding:64px 0 48px}.reading-section-header{grid-template-columns:52px minmax(0,1fr);align-items:baseline;margin-bottom:48px;display:grid}.reading-section-header>span{color:var(--accent);font-size:22px;font-weight:680}.reading-section-header h2{margin:0;font-size:27px;font-weight:660;line-height:1.3}.reading-section-header p{color:var(--ink-soft);grid-column:2;margin:10px 0 0;font-size:14px;line-height:1.7}.content-group{scroll-margin-top:calc(var(--header-height) + 26px);margin:0 0 54px}.content-group:last-of-type{margin-bottom:32px}.group-number{color:var(--ink);margin-bottom:8px;font-size:18px;font-weight:680;display:block}.content-group>h3{margin:0 0 22px;font-size:20px;font-weight:650;line-height:1.45}.group-blocks{min-width:0}.content-block{scroll-margin-top:calc(var(--header-height) + 24px);margin-bottom:24px}.content-block.conclusion{border-left:3px solid var(--accent);background:var(--accent-soft);padding:16px 18px}.markdown{min-width:0}.markdown>:first-child{margin-top:0}.markdown>:last-child{margin-bottom:0}.markdown p,.markdown li{color:var(--ink);font-size:15px;line-height:1.86}.markdown p{margin:0 0 14px}.markdown ul,.markdown ol{margin:14px 0;padding-left:1.6em}.markdown>ol,.markdown>ul{padding-left:0;list-style:none}.markdown>ol{counter-reset:content-list var(--list-start,0)}.markdown>ol>li,.markdown>ul>li{padding-left:2em;position:relative}.markdown>ol>li{counter-increment:content-list}.markdown>ol>li:before{content:counter(content-list) ".";text-align:right;width:1.45em;position:absolute;top:0;left:0}.markdown>ul>li:before{content:"";background:currentColor;border-radius:50%;width:5px;height:5px;position:absolute;top:.82em;left:.3em}.markdown li+li{margin-top:7px}.markdown strong{font-weight:660}.markdown h3{margin:34px 0 16px;font-size:18px;font-weight:650;line-height:1.5}.markdown .katex-display{border:1px solid var(--line);background:var(--surface);text-align:center;scrollbar-width:thin;border-radius:6px;max-width:100%;margin:20px 0;padding:14px 16px;overflow:auto hidden}.markdown .katex-display>.katex{min-width:max-content}.markdown .katex{font-size:1.02em}.content-note{border:1px solid var(--line);border-left:3px solid var(--accent);background:var(--surface);border-radius:6px;margin:18px 0 26px;padding:15px 17px}.content-note>strong{margin-bottom:5px;font-size:13px;display:block}.content-note .markdown p{color:var(--ink-soft);font-size:13px}.term-supplement summary{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:6px;width:fit-content;display:flex}.table-scroll{border:1px solid var(--line);scrollbar-width:thin;border-radius:6px;max-width:100%;margin:24px 0;overflow-x:auto}.comparison-table{border-collapse:collapse;table-layout:fixed;width:100%;min-width:700px}.comparison-table th,.comparison-table td{border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-align:center;vertical-align:middle;padding:12px 14px}.comparison-table th:last-child,.comparison-table td:last-child{border-right:0}.comparison-table tbody tr:last-child th,.comparison-table tbody tr:last-child td{border-bottom:0}.comparison-table thead th{background:var(--surface-strong);font-size:12px;font-weight:650}.comparison-table tbody th{background:var(--surface);text-align:left;width:170px}.comparison-table .markdown p{font-size:12px;line-height:1.5}.figure-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--page);margin:28px 0 34px;overflow:hidden}.figure-toolbar{border-bottom:1px solid var(--line);background:var(--surface);justify-content:space-between;align-items:center;gap:16px;min-height:52px;padding:10px 12px 10px 16px;display:flex}.figure-toolbar figcaption{align-items:baseline;gap:10px;min-width:0;display:flex}.figure-toolbar figcaption strong{color:var(--accent);flex:none;font-size:12px}.figure-toolbar figcaption span{overflow-wrap:anywhere;font-size:13px;font-weight:580}.segmented{border:1px solid var(--line);background:var(--surface);border-radius:7px;align-items:center;padding:3px;display:inline-flex}.segmented button{min-height:31px;color:var(--ink-soft);cursor:pointer;background:0 0;border:0;border-radius:5px;justify-content:center;align-items:center;gap:6px;padding:0 13px;font-size:12px;font-weight:580;display:inline-flex}.segmented button.active{background:var(--page);color:var(--accent);box-shadow:0 0 0 1px var(--line)}.segmented.compact{flex:none}.segmented.compact button{min-height:27px;padding:0 9px;font-size:11px}.figure-redraw{background:#fbfbfa;place-items:center;min-height:280px;padding:28px;display:grid}.figure-redraw.standalone{border:1px solid var(--line);border-radius:6px;min-height:420px}.scan-grid{background:var(--page);grid-template-columns:repeat(2,minmax(0,1fr));place-items:center;gap:18px;min-height:280px;padding:24px;display:grid}.scan-grid.scan-count-1,.scan-grid.scan-count-3{grid-template-columns:repeat(3,minmax(0,1fr))}.scan-grid.scan-count-1 img{grid-column:2}.scan-grid img{object-fit:contain;max-width:100%;max-height:300px}.scientific-svg{aspect-ratio:236/205;width:min(100%,430px);max-height:330px}.scientific-svg.wide{aspect-ratio:16/9;width:min(100%,620px)}.scientific-svg.compact{width:220px;height:190px}.diagram-line,.diagram-link{fill:none;stroke:#77736c;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.5px}.diagram-line.muted{stroke:#b8b5ae;stroke-dasharray:4 4}.diagram-line.strong{stroke-width:2px}.diagram-line.accent{stroke:var(--accent)}.diagram-link{stroke:var(--line-strong);stroke-width:1.2px}.diagram-atom{fill:#f3f2ef;stroke:#5f5b54;stroke-width:1.5px}.diagram-atom.accent{fill:var(--accent-soft);stroke:var(--accent);stroke-width:2px}.diagram-atom.void{fill:var(--accent);stroke:#8e412f}.diagram-atom-label{fill:#fff;text-anchor:middle;font-size:9px;font-weight:700}.diagram-caption{fill:var(--ink-soft);font-size:11px}.diagram-caption.accent{fill:var(--accent);font-weight:650}.diagram-node{fill:#fff;stroke:var(--line-strong)}.diagram-node.accent{fill:var(--accent-soft);stroke:var(--accent)}.diagram-node-text{fill:var(--ink);text-anchor:middle;font-size:12px;font-weight:600}.diagram-plane{fill:var(--surface);stroke:var(--line-strong)}.diagram-plane.accent{fill:var(--accent-soft);stroke:var(--accent)}.worked-example{border-left:2px solid var(--line-strong);padding:0 0 0 22px}.example-label{color:var(--accent);margin:0 0 8px;font-size:11px;font-weight:700}.example-prompt{margin-bottom:30px}.example-prompt p{font-weight:580}.example-solution .figure-panel{margin-right:0}.exercise-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--page);overflow:hidden}.exercise-question{padding:20px 22px}.exercise-meta{justify-content:space-between;align-items:center;gap:16px;margin-bottom:10px;display:flex}.exercise-meta>span{color:var(--accent);font-size:11px;font-weight:700}.completion-toggle{min-height:28px;color:var(--ink-faint);padding:0 9px;font-size:11px}.completion-toggle.completed{background:var(--success-soft);color:var(--success);border-color:#bed0c6}.answer-toggle{background:var(--surface);width:100%;height:40px;color:var(--ink-soft);border-width:1px 0 0;border-radius:0;font-size:12px;font-weight:620}.answer-toggle:hover{color:var(--accent)}.exercise-answer{border-top:1px solid var(--line);padding:22px}.exercise-answer .figure-panel{margin-bottom:4px}.term-supplement{border-top:1px solid var(--line);margin-top:24px;padding-top:18px}.term-supplement h3{color:var(--accent);align-items:center;gap:8px;margin:0;font-size:15px;font-weight:650;display:flex}.supplement-disclaimer{color:var(--ink-faint);margin:12px 0 18px;font-size:12px;line-height:1.6}.term-definition-groups{border-top:1px solid var(--line-strong)}.term-definition-group{border-bottom:1px solid var(--line-strong);padding:20px 0 8px}.term-definition-group>header{grid-template-columns:34px minmax(0,1fr) auto;align-items:baseline;gap:10px;margin-bottom:8px;display:grid}.term-definition-group>header>span{color:var(--accent);font-variant-numeric:tabular-nums;font-size:12px;font-weight:700}.term-definition-group>header h4{color:var(--ink);margin:0;font-size:15px;font-weight:680}.term-definition-group>header small{color:var(--ink-faint);white-space:nowrap;font-size:11px}.term-definition-list{margin:0}.term-definition-list>div{border-top:1px solid var(--line);grid-template-columns:minmax(104px,.25fr) minmax(0,1fr);gap:18px;padding:11px 0;display:grid}.term-definition-list dt{font-size:13px;font-weight:650}.term-definition-list dd{margin:0}.term-definition-list .markdown p{color:var(--ink-soft);font-size:13px;line-height:1.65}.section-read-button{min-height:36px;color:var(--ink-soft);align-items:center;gap:7px;padding:0 12px;font-size:12px;display:inline-flex}.section-read-button.completed{background:var(--success-soft);color:var(--success);border-color:#bed0c6}.context-rail{top:calc(var(--header-height) + 24px);min-width:0;padding:2px 0 28px;position:sticky}.context-rail.collapsed{justify-content:flex-end;display:flex}.context-heading{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.context-heading>span,.context-list>span{color:var(--ink-faint);font-size:11px;font-weight:650}.context-title{border-bottom:1px solid var(--line);padding-bottom:16px;font-size:13px;line-height:1.55;display:block}.context-stat{border-bottom:1px solid var(--line);color:var(--ink-soft);justify-content:space-between;align-items:center;padding:14px 0;font-size:11px;display:flex}.context-stat b{color:var(--accent);font-variant-numeric:tabular-nums}.context-list{border-bottom:1px solid var(--line);padding:16px 0}.context-list>span{margin-bottom:8px;display:block}.context-list button{width:100%;color:var(--ink-soft);text-align:left;cursor:pointer;background:0 0;border:0;padding:7px 0;font-size:11px;line-height:1.5}.context-list button:hover{color:var(--accent)}.context-list p{color:var(--ink-soft);margin:0;font-size:11px;line-height:1.55}.context-helper{color:var(--ink-faint);margin:16px 0 0;font-size:10px;line-height:1.55}.tool-column{width:min(100% - 40px,980px);margin:0 auto;padding:50px 0 100px}.tool-loading{min-height:50vh;color:var(--ink-faint);place-items:center;font-size:13px;display:grid}.card-tool{padding-top:36px}.card-tool .tool-heading{margin-bottom:24px;padding-bottom:20px}.tool-heading{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:34px;padding-bottom:26px;display:flex}.tool-heading h1{margin:0;font-size:28px;font-weight:660;line-height:1.3}.tool-heading p{color:var(--ink-soft);margin:9px 0 0;font-size:14px;line-height:1.65}.tool-heading>span{color:var(--ink-faint);flex:none;margin-top:7px;font-size:12px}.chapter-waiting{text-align:center;width:min(100% - 40px,760px);margin:0 auto;padding:clamp(110px,18vh,190px) 0 80px}.chapter-waiting>svg{color:var(--accent)}.chapter-waiting p{color:var(--accent);margin:22px 0 8px;font-size:14px;font-weight:650}.chapter-waiting h1{margin:0;font-size:30px;font-weight:670}.chapter-waiting>span{color:var(--ink-soft);margin:14px 0 28px;font-size:15px;display:block}.chapter-waiting .source-link{margin:0 auto}.memory-deck-tabs{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-bottom:14px;display:grid}.memory-deck-tabs button{border:1px solid var(--line);background:var(--page);min-height:44px;color:var(--ink-soft);cursor:pointer;border-radius:7px;justify-content:center;align-items:center;gap:8px;padding:0 12px;font-size:13px;transition:border-color .16s,background .16s,color .16s;display:flex;position:relative}.memory-deck-tabs button span{white-space:nowrap}.memory-deck-tabs button>svg{flex:none}.memory-deck-tabs button:hover{background:var(--surface)}.memory-deck-tabs button.active{border-color:color-mix(in srgb, var(--accent) 45%, var(--line));background:var(--accent-soft);color:var(--accent)}.memory-deck-tabs button b{background:var(--surface-strong);min-width:20px;color:var(--ink-faint);border-radius:999px;padding:1px 5px;font-size:10px;font-weight:600}.memory-deck-tabs button.active b{background:var(--page);color:var(--accent)}.card-module-filter{border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:minmax(250px,.8fr) minmax(0,1.2fr);align-items:center;gap:22px;min-height:64px;margin-bottom:16px;padding:11px 0;display:grid}.card-module-control{grid-template-columns:20px auto minmax(0,1fr);align-items:center;gap:9px;min-width:0;display:grid}.card-module-control>svg{color:var(--accent)}.card-module-control label{color:var(--ink);white-space:nowrap;font-size:13px;font-weight:650}.card-module-control select{border:1px solid var(--line-strong);background:var(--page);width:100%;min-width:0;height:36px;color:var(--ink);font:inherit;cursor:pointer;border-radius:6px;padding:0 10px;font-size:13px}.card-module-control select:focus-visible{border-color:var(--accent);outline:2px solid color-mix(in srgb, var(--accent) 22%, transparent);outline-offset:1px}.card-module-filter>p{color:var(--ink-soft);margin:0;font-size:12px;line-height:1.55}.card-progress-track{background:var(--line);height:2px;margin:0 0 18px;overflow:hidden}.card-progress-track i{transform-origin:0;background:var(--accent);width:100%;height:100%;transition:transform .42s cubic-bezier(.22,.75,.22,1);display:block}.study-card-stage{isolation:isolate;width:100%;height:clamp(330px,46vh,480px);color:var(--ink);cursor:pointer;outline:none;position:relative}.study-card-stage:focus-visible .study-card-current .study-card-panel{outline:2px solid color-mix(in srgb, var(--accent) 55%, transparent);outline-offset:3px}.study-card-layer{position:absolute;inset:0}.study-card-current{z-index:2}.study-card-previous{z-index:3;pointer-events:none}.study-card-sheet,.study-card-surface,.study-card-panel{width:100%;height:100%}.study-card-surface{position:relative}.study-card-panel{border:1px solid var(--line-strong);border-radius:var(--card-radius);background:var(--page);opacity:0;pointer-events:none;will-change:opacity, transform;flex-direction:column;padding:42px 48px 34px;transition:opacity .22s,transform .26s cubic-bezier(.22,.75,.22,1),border-color .18s;display:flex;position:absolute;inset:0;overflow:hidden;transform:translateY(8px)}.study-card-stage:hover .study-card-current .study-card-panel{border-color:color-mix(in srgb, var(--accent) 55%, var(--line-strong))}.study-card-front{z-index:2;opacity:1;pointer-events:auto;transform:translateY(0)}.study-card-back{z-index:1;background:#fbfbfa}.study-card-surface.revealed .study-card-front{z-index:1;opacity:0;pointer-events:none;transform:translateY(-8px)}.study-card-surface.revealed .study-card-back{z-index:2;opacity:1;pointer-events:auto;transform:translateY(0)}.study-card-meta{border-bottom:1px solid var(--line);flex:none;justify-content:space-between;align-items:center;gap:16px;padding-bottom:17px;display:flex}.study-card-meta span{color:var(--accent);font-size:13px;font-weight:700}.study-card-meta b{color:var(--ink-faint);text-overflow:ellipsis;white-space:nowrap;font-size:13px;font-weight:500;overflow:hidden}.study-card-question{text-align:center;scrollbar-width:thin;flex:1;place-items:center;padding:24px 4%;display:grid;overflow-y:auto}.study-card-question .markdown,.study-card-answer-content{width:100%}.study-card-question p{max-width:720px;margin:0 auto;font-size:28px;font-weight:620;line-height:1.58}.study-card-answer{overscroll-behavior:contain;text-align:left;scrollbar-color:var(--line-strong) transparent;scrollbar-width:thin;flex-direction:column;flex:1;padding:22px 4px 18px;display:flex;overflow-y:auto}.study-card-answer-content{margin-block:auto}.study-card-answer-content.has-visuals{margin-block:0}.card-answer-visuals{gap:22px;margin-top:18px;display:grid}.card-book-figure{margin:0}.card-book-figure .scan-grid{min-height:0;padding:18px}.card-book-figure .scan-grid.scan-count-1{grid-template-columns:minmax(0,1fr)}.card-book-figure .scan-grid.scan-count-1 img{grid-column:1}.card-book-figure .scan-grid img{width:auto;max-width:100%;max-height:none}.miller-drawing-guide{border-top:1px solid var(--line-strong);margin-top:24px;padding-top:20px}.miller-drawing-guide>header{justify-content:space-between;align-items:flex-start;gap:28px;margin-bottom:18px;display:flex}.miller-drawing-guide>header>div{flex:none}.miller-drawing-guide>header span{color:var(--accent);font-size:11px;font-weight:700}.miller-drawing-guide>header h4{color:var(--ink);margin:4px 0 0;font-size:16px;font-weight:680}.miller-drawing-guide>header p{max-width:430px;color:var(--ink-faint);text-align:right;margin:0;font-size:12px;line-height:1.65}.miller-diagram-grid{border-top:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.miller-diagram-tile{border-bottom:1px solid var(--line);min-width:0;padding:16px 14px 14px}.miller-diagram-tile:not(:nth-child(3n+1)){border-left:1px solid var(--line)}.miller-diagram-tile>header{justify-content:space-between;align-items:baseline;gap:10px;display:flex}.miller-diagram-tile>header b{color:var(--ink);font-size:15px;font-weight:680}.miller-diagram-tile>header span{color:var(--ink-faint);font-size:11px}.miller-diagram-tile svg{width:100%;max-height:190px;margin:4px auto 0;display:block}.miller-diagram-tile svg text{fill:var(--ink-faint);font-size:12px;font-weight:650}.miller-cube-edges line{stroke:#9a9a96;stroke-width:1.35px;vector-effect:non-scaling-stroke}.miller-target-plane{fill:color-mix(in srgb, var(--accent) 24%, transparent);stroke:var(--accent);stroke-width:2px;stroke-linejoin:round;vector-effect:non-scaling-stroke}.miller-target-point,.miller-direction-origin{fill:var(--accent)}.miller-target-direction{stroke:var(--accent);stroke-width:3px;stroke-linecap:round;vector-effect:non-scaling-stroke}.miller-arrow-head{fill:var(--accent)}.miller-diagram-tile>p{color:var(--ink-soft);text-align:center;margin:0;font-size:11px;line-height:1.5}.miller-drawing-note{color:var(--ink-faint);margin:13px 0 0;font-size:11px;line-height:1.55}.study-card-answer p,.study-card-answer li{font-size:16px;line-height:1.75}.study-card-answer p:first-child{margin-top:0}.study-card-answer p:last-child,.study-card-answer ul:last-child,.study-card-answer ol:last-child{margin-bottom:0}.study-card-answer .katex-display{margin:.85em 0;overflow:auto hidden}.study-card-panel>small{color:var(--ink-faint);flex:none;align-self:center;font-size:12px}.assessment-mark{z-index:6;border:1px solid var(--line);background:var(--page);min-height:34px;color:var(--ink-soft);opacity:0;pointer-events:none;border-radius:6px;align-items:center;gap:7px;padding:0 11px;font-size:12px;font-weight:650;display:inline-flex;position:absolute;top:18px;right:18px;transform:translateY(-8px)scale(.96)}.assessment-mastered .assessment-mark,.assessment-review .assessment-mark{animation:.26s cubic-bezier(.2,.8,.2,1) both assessment-in}.assessment-mastered .assessment-mark{color:var(--success)}.assessment-review .assessment-mark{color:var(--danger)}.entering-next{animation:.36s cubic-bezier(.22,.75,.22,1) both card-enter-next}.leaving-next{animation:.3s both card-leave-next}.entering-previous{animation:.36s cubic-bezier(.22,.75,.22,1) both card-enter-previous}.leaving-previous{animation:.3s both card-leave-previous}@keyframes card-enter-next{0%{opacity:0;transform:translate(3%)}to{opacity:1;transform:translate(0)}}@keyframes card-leave-next{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(-2%)}}@keyframes card-enter-previous{0%{opacity:0;transform:translate(-3%)}to{opacity:1;transform:translate(0)}}@keyframes card-leave-previous{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(2%)}}@keyframes assessment-in{0%{opacity:0;transform:translateY(-8px)scale(.96)}to{opacity:1;transform:translateY(0)scale(1)}}.card-assessment{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px;display:grid}.card-assessment button{border:1px solid var(--line);background:var(--page);cursor:pointer;border-radius:6px;justify-content:center;align-items:center;gap:7px;min-height:46px;font-size:14px;font-weight:600;display:inline-flex}.card-assessment .review-button{color:var(--danger)}.card-assessment .master-button{color:var(--success)}.card-assessment .favorite-button{color:var(--ink-soft)}.card-assessment .favorite-button.active{border-color:color-mix(in srgb, var(--accent) 45%, var(--line));background:var(--accent-soft);color:var(--accent)}.card-assessment button:hover{background:var(--surface)}.card-navigation{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:12px;display:grid}.card-navigation button{border:1px solid var(--line-strong);background:var(--page);min-height:54px;color:var(--ink);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;gap:10px;font-size:15px;font-weight:630;transition:border-color .16s,background .16s,color .16s;display:inline-flex}.card-navigation button:hover:not(:disabled){border-color:color-mix(in srgb, var(--accent) 50%, var(--line-strong));background:var(--accent-soft);color:var(--accent)}.card-navigation button:disabled{cursor:default;opacity:.45}.card-state{color:var(--ink-faint);font-size:13px}.card-state.mastered{color:var(--success)}.card-state.review{color:var(--danger)}.card-state-reset{cursor:pointer;background:0 0;border:0;align-items:center;gap:5px;width:fit-content;min-height:30px;padding:0;display:inline-flex}.card-state-reset:hover{text-underline-offset:3px;text-decoration:underline}.source-link{min-height:36px;color:var(--ink-soft);justify-content:center;align-items:center;gap:6px;padding:0 10px;font-size:13px;display:inline-flex}.card-empty-state{border:1px solid var(--line);border-radius:var(--card-radius);min-height:390px;color:var(--ink-faint);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:40px 24px;display:flex}.card-empty-state h2{color:var(--ink);margin:18px 0 8px;font-size:20px}.card-empty-state p{color:var(--ink-soft);margin:0 0 22px;font-size:14px}.card-summary{border:1px solid var(--line);background:color-mix(in srgb, var(--panel) 70%, var(--page));border-radius:8px;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:34px;display:grid;overflow:hidden}.card-summary>span{min-width:0;color:var(--ink-faint);text-align:center;justify-content:center;align-items:baseline;gap:7px;padding:14px 10px;display:flex}.card-summary>span+span{border-left:1px solid var(--line)}.card-summary b{color:var(--ink);font-variant-numeric:tabular-nums;font-size:17px;font-weight:680}.card-summary small{white-space:nowrap;font-size:12px}.diagram-layout{grid-template-columns:210px minmax(0,1fr);gap:36px;display:grid}.diagram-topic-list{border-right:1px solid var(--line);padding-right:18px}.diagram-topic-list button{width:100%;color:var(--ink-soft);text-align:left;cursor:pointer;background:0 0;border:0;border-radius:6px;grid-template-columns:28px minmax(0,1fr);gap:4px;padding:12px 8px;display:grid}.diagram-topic-list button span{color:var(--ink-faint);font-size:12px}.diagram-topic-list button strong{font-size:13px;font-weight:580;line-height:1.45}.diagram-topic-list button:hover{background:var(--surface)}.diagram-topic-list button.active{background:var(--accent-soft);color:var(--accent)}.diagram-canvas{min-width:0}.diagram-canvas-heading{justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:28px;display:flex}.diagram-canvas-heading span{color:var(--accent);font-size:13px;font-weight:700}.diagram-canvas-heading h2{margin:6px 0 0;font-size:21px;font-weight:650}.diagram-canvas-heading p{color:var(--ink-soft);margin:9px 0 0;font-size:13px;line-height:1.6}.structure-tabs{margin-bottom:20px}.crystal-model-shell{border:1px solid var(--line);background:#fbfbfa;border-radius:8px;height:clamp(360px,48vh,500px);position:relative;overflow:hidden}.crystal-model-canvas,.crystal-model-canvas canvas{width:100%;height:100%;display:block}.crystal-model-shell>span{color:var(--ink-faint);pointer-events:none;background:#fbfbfae0;border:1px solid #867e7542;border-radius:5px;padding:5px 8px;font-size:11px;position:absolute;bottom:10px;right:12px}.structure-stage{border:1px solid var(--line);background:#fbfbfa;border-radius:6px;place-items:center;min-height:340px;margin:0;display:grid}.structure-reference{background:var(--page);grid-template-rows:minmax(0,1fr) auto;gap:12px;min-height:390px;padding:18px 18px 0;overflow:hidden}.structure-reference img{object-fit:contain;width:100%;height:310px;display:block}.structure-reference figcaption{border-top:1px solid var(--line);width:calc(100% + 36px);min-height:44px;color:var(--ink-faint);justify-content:space-between;align-items:center;gap:16px;margin:0 -18px;padding:10px 14px;font-size:11px;display:flex}.structure-reference figcaption a{color:var(--ink-soft);white-space:nowrap;align-items:center;gap:5px;text-decoration:none;display:inline-flex}.structure-reference figcaption a:hover{color:var(--accent)}.metric-table-heading,.metric-row{grid-template-columns:minmax(130px,1.4fr) repeat(3,1fr);align-items:center;gap:8px;display:grid}.metric-table-heading{color:var(--ink-faint);text-align:center;margin-top:28px;padding:0 12px 9px;font-size:12px}.metric-table-heading span{text-align:left}.metric-row{border-top:1px solid var(--line);text-align:center;min-height:42px;padding:8px 12px;font-size:13px}.metric-row span{color:var(--ink-soft);text-align:left}.metric-row b{font-weight:590}.metric-row .katex{font-size:1.04em}.reference-diagram-panel{gap:24px;display:grid}.reference-diagram-panel .index-guide{border:1px solid var(--line);background:var(--surface);border-radius:8px;width:100%;padding:26px}.diagram-reference-grid{border:1px solid var(--line);background:var(--page);border-radius:8px;grid-template-columns:repeat(2,minmax(0,1fr));place-items:center;gap:18px;min-height:340px;padding:24px;display:grid}.diagram-reference-grid.count-3{grid-template-columns:repeat(3,minmax(0,1fr))}.diagram-reference-grid img{object-fit:contain;width:100%;max-height:300px}.index-guide{grid-template-columns:1fr 1px 1fr;align-items:stretch;gap:28px;width:min(100%,640px);display:grid}.index-guide section>span{color:var(--accent);font-size:14px;font-weight:660}.index-guide ol{margin:18px 0 0;padding-left:20px}.index-guide li{color:var(--ink-soft);padding:5px 0;font-size:13px}.index-divider{background:var(--line)}.index-guide>p{border-top:1px solid var(--line);color:var(--ink-soft);text-align:center;grid-column:1/-1;margin:6px 0 0;padding-top:18px;font-size:13px}.exercise-mode-toolbar{justify-content:space-between;align-items:center;gap:18px;margin-bottom:42px;display:flex}.exercise-mode-toolbar p{color:var(--ink-faint);margin:0;font-size:12px}.exercise-carousel-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;margin-bottom:18px;padding-bottom:16px;display:flex}.exercise-carousel-header>div:first-child{align-items:baseline;gap:12px;min-width:0;display:flex}.exercise-carousel-header span{color:var(--accent);flex:none;font-size:12px;font-weight:700}.exercise-carousel-header strong{text-overflow:ellipsis;white-space:nowrap;font-size:15px;font-weight:620;overflow:hidden}.exercise-carousel-dots{align-items:center;gap:3px;display:flex}.exercise-carousel-dots button{cursor:pointer;background:0 0;border:0;place-items:center;width:22px;height:22px;padding:0;display:grid}.exercise-carousel-dots button:after{background:var(--line-strong);content:"";border-radius:50%;width:6px;height:6px;transition:width .18s,border-radius .18s,background .18s}.exercise-carousel-dots button.active:after{background:var(--accent);border-radius:999px;width:16px}.exercise-carousel-dots button:focus-visible{outline:2px solid color-mix(in srgb, var(--accent) 48%, transparent);outline-offset:-2px;border-radius:999px}.exercise-carousel-viewport{touch-action:pan-y;position:relative;overflow-x:clip}.exercise-mode-item{scroll-margin-top:calc(var(--header-height) + 24px);margin:0}.exercise-slide-current{z-index:1;position:relative}.exercise-slide-previous{z-index:2;pointer-events:none;width:100%;position:absolute;inset:0 0 auto}.exercise-mode-item>header{align-items:baseline;gap:14px;margin-bottom:14px;display:flex}.exercise-mode-item>header span{color:var(--accent);font-size:12px;font-weight:650}.exercise-mode-item>header h2{margin:0;font-size:18px;font-weight:630}.exercise-carousel-navigation{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px;display:grid}.exercise-carousel-navigation button{border:1px solid var(--line-strong);background:var(--page);min-height:52px;color:var(--ink);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;gap:9px;font-size:14px;font-weight:630;transition:border-color .16s,background .16s,color .16s;display:inline-flex}.exercise-carousel-navigation button:hover:not(:disabled){border-color:color-mix(in srgb, var(--accent) 50%, var(--line-strong));background:var(--accent-soft);color:var(--accent)}.exercise-carousel-navigation button:disabled{cursor:default;opacity:.38}.dialog-backdrop,.drawer-backdrop{z-index:100;background:#25231f47;place-items:start center;padding:11vh 20px 20px;display:grid;position:fixed;inset:0}.search-dialog{border:1px solid var(--line-strong);background:var(--page);border-radius:8px;width:min(100%,620px);max-height:min(680px,78vh);overflow:hidden;box-shadow:0 18px 50px #25231f29}.search-dialog>header{border-bottom:1px solid var(--line);grid-template-columns:20px minmax(0,1fr) 32px;align-items:center;gap:10px;height:52px;padding:0 12px 0 16px;display:grid}.search-dialog input{width:100%;height:100%;color:var(--ink);background:0 0;border:0;outline:0;font-size:14px}.search-dialog input::placeholder{color:var(--ink-faint)}.search-results{max-height:calc(min(680px,78vh) - 52px);padding:8px;overflow-y:auto}.search-results button{text-align:left;cursor:pointer;background:0 0;border:0;border-radius:6px;width:100%;padding:11px 12px;display:block}.search-results button:hover{background:var(--surface)}.search-results button span{color:var(--ink-faint);margin-bottom:3px;font-size:10px;display:block}.search-results button strong{font-size:13px;font-weight:590}.search-results>p{color:var(--ink-faint);text-align:center;padding:24px;font-size:13px}.drawer-backdrop{display:none}@media (width<=1220px){.app-header{grid-template-columns:minmax(190px,1fr) auto minmax(170px,1fr);gap:14px;padding:0 18px}.sdu-custom-copy{display:none}.sdu-logo-shell{width:112px;height:40px}.mode-navigation button{min-width:78px}.reader-shell{grid-template-columns:214px minmax(0,800px);gap:38px;max-width:1110px}.context-rail{display:none}}@media (width<=820px){:root{--header-height:54px}body{padding-bottom:64px}.app-header{height:var(--header-height);grid-template-columns:32px minmax(0,1fr) auto;gap:10px;padding:0 12px}.mobile-menu-button{display:inline-grid}.brand-lockup{gap:8px;display:flex;overflow:hidden}.sdu-study-brand{flex:none;order:2}.sdu-logo-shell{justify-content:center;width:clamp(72px,24vw,96px);height:34px;padding:3px 0}.sdu-logo{object-fit:contain;width:100%;max-width:100%;height:100%}.sdu-custom-copy{display:none}.chapter-switcher{order:1;min-width:0;overflow:hidden}.chapter-switcher-trigger{max-width:100%;padding:0 4px}.chapter-switcher-trigger span{min-width:0;color:var(--ink);text-overflow:ellipsis;flex:auto;font-size:13px;font-weight:630;display:block;overflow:hidden}.mode-navigation,.header-progress,.header-action span,.header-actions>.icon-button{display:none}.header-action{justify-content:center;width:32px;padding:0}.reader-shell{padding:0 20px 74px;display:block}.reader-shell>.chapter-outline{display:none}.chapter-heading{padding:38px 0 42px}.chapter-heading p{font-size:17px}.chapter-heading h1{font-size:30px}.chapter-heading span{font-size:14px}.reading-section{padding:48px 0 38px}.reading-section-header{grid-template-columns:42px minmax(0,1fr);margin-bottom:36px}.reading-section-header h2{font-size:24px}.content-group{margin-bottom:44px}.content-group>h3{font-size:18px}.markdown p,.markdown li{font-size:15px;line-height:1.82}.markdown .katex-display{text-align:left;margin-left:-4px;margin-right:-4px;padding:12px}.table-scroll{margin-left:-2px;margin-right:-2px}.comparison-table th:first-child{z-index:2;box-shadow:1px 0 0 var(--line);position:sticky;left:0}.figure-toolbar{align-items:flex-start}.figure-toolbar figcaption,.figure-toolbar figcaption strong,.figure-toolbar figcaption span{display:block}.figure-toolbar figcaption span{margin-top:3px;font-size:12px}.figure-redraw{min-height:240px;padding:18px}.scan-grid,.scan-grid.scan-count-1,.scan-grid.scan-count-3{grid-template-columns:repeat(2,minmax(0,1fr));padding:16px}.scan-grid.scan-count-1 img{grid-column:1/-1}.worked-example{padding-left:14px}.exercise-question,.exercise-answer{padding:17px}.term-definition-list>div{grid-template-columns:minmax(76px,.34fr) minmax(0,1fr);gap:12px}.term-definition-list dd{min-width:0}.tool-column{width:100%;padding:32px 18px 84px}.tool-heading{margin-bottom:26px}.tool-heading h1{font-size:24px}.tool-heading p{font-size:13px}.memory-deck-tabs button{gap:5px;min-height:52px;padding:0 27px 0 8px;font-size:12px}.memory-deck-tabs button b{position:absolute;top:7px;right:6px}.card-module-filter{grid-template-columns:1fr;gap:7px}.card-module-filter>p{padding-left:29px}.study-card-stage{height:clamp(350px,50vh,460px)}.study-card-panel{padding:28px 22px 24px}.study-card-question{padding-inline:0}.study-card-question p{font-size:23px;line-height:1.55}.study-card-answer p,.study-card-answer li{font-size:16px}.card-book-figure .scan-grid,.card-book-figure .scan-grid.scan-count-1,.card-book-figure .scan-grid.scan-count-3{grid-template-columns:minmax(0,1fr)}.miller-drawing-guide>header{display:block}.miller-drawing-guide>header p{text-align:left;margin-top:9px}.miller-diagram-grid{grid-template-columns:minmax(0,1fr)}.miller-diagram-tile:not(:nth-child(3n+1)){border-left:0}.miller-diagram-tile svg{max-height:230px}.study-card-meta{gap:10px}.study-card-meta b{max-width:72%}.assessment-mark{top:12px;right:12px}.card-summary{margin-top:26px}.card-summary>span{flex-direction:column;align-items:center;gap:2px;padding:11px 4px 10px}.card-summary b{font-size:16px}.card-summary small{font-size:10px}.diagram-layout{display:block}.diagram-topic-list{border-right:0;border-bottom:1px solid var(--line);scrollbar-width:none;gap:5px;margin-bottom:26px;padding:0 0 9px;display:flex;overflow-x:auto}.diagram-topic-list button{flex:0 0 150px;width:150px}.diagram-canvas-heading{display:block}.diagram-canvas-heading .source-link{margin-top:14px}.structure-stage{min-height:290px}.crystal-model-shell{height:360px}.structure-reference{min-height:350px}.structure-reference img{height:270px}.structure-reference figcaption{flex-direction:column;align-items:flex-start;gap:5px}.metric-table-heading,.metric-row{grid-template-columns:minmax(100px,1.4fr) repeat(3,1fr);gap:4px;font-size:12px}.figure-redraw.standalone{min-height:330px}.index-guide{grid-template-columns:1fr}.index-divider{width:100%;height:1px}.index-guide>p{grid-column:1}.diagram-reference-grid,.diagram-reference-grid.count-3{grid-template-columns:repeat(2,minmax(0,1fr));min-height:0;padding:16px}.exercise-mode-toolbar{display:block}.exercise-mode-toolbar p{margin-top:10px}.exercise-carousel-header{display:block}.exercise-carousel-header>div:first-child{justify-content:space-between}.exercise-carousel-dots{justify-content:center;margin-top:12px}.mobile-mode-nav{z-index:60;height:64px;padding-bottom:env(safe-area-inset-bottom);border-top:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffffff7;grid-template-columns:repeat(4,1fr);display:grid;position:fixed;bottom:0;left:0;right:0}.mobile-mode-nav button{min-width:0;color:var(--ink-faint);background:0 0;border:0;flex-direction:column;justify-content:center;align-items:center;gap:4px;font-size:10px;display:flex}.mobile-mode-nav button.active{color:var(--accent)}.drawer-backdrop{background:#25231f52;padding:0;display:block}.chapter-outline.mobile{background:var(--page);width:min(86vw,340px);max-height:none;padding:0 14px 40px;position:fixed;top:0;bottom:0;left:0;overflow-y:auto;box-shadow:12px 0 36px #25231f24}.drawer-heading{z-index:2;background:var(--page);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;height:58px;margin-bottom:8px;font-size:14px;display:flex;position:sticky;top:0}.dialog-backdrop{padding:7vh 12px 76px}}@media (width<=430px){.reader-shell{padding-left:16px;padding-right:16px}.chapter-heading h1{font-size:28px}.reading-section-header{display:block}.reading-section-header>span{margin-bottom:7px;display:block}.chapter-menu{width:min(330px,100vw - 24px);left:-42px}.card-navigation button{min-height:52px}.diagram-reference-grid,.diagram-reference-grid.count-3{grid-template-columns:1fr}.reading-section-header p{margin-top:8px}.figure-toolbar{display:block}.figure-toolbar .segmented{margin-top:10px}.tool-heading{display:block}.tool-heading>span{margin-top:12px;display:block}.card-tool .tool-heading{align-items:baseline;display:flex}.card-tool .tool-heading>span{margin-top:0}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}
