@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/math/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/math/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/math/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/math/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/math/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/math/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/math/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/math/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/math/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/math/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/math/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/math/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/math/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(/math/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/math/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/math/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(/math/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/math/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/math/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(/math/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/math/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/math/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/math/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/math/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/math/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/math/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(/math/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/math/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/math/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}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.16.38"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);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{--bg-primary:#fff;--bg-secondary:#f0f7f4;--bg-card:#fff;--text-primary:#1a1a2e;--text-secondary:#6b7280;--text-muted:#9ca3af;--accent:#0ea5a0;--accent-hover:#0d9488;--accent-light:#e6f7f5;--accent-gradient:linear-gradient(135deg, #0ea5a0, #06b6d4);--success:#22c55e;--success-bg:#f0fdf4;--danger:#ef4444;--danger-bg:#fef2f2;--warning:#f59e0b;--warning-bg:#fffbeb;--border:#e5e7eb;--shadow:0 1px 3px #00000014;--shadow-md:0 4px 12px #00000014;--shadow-lg:0 8px 24px #0000001a;--priority-p0:#ef4444;--priority-p0-bg:#fef2f2;--priority-p1:#f59e0b;--priority-p1-bg:#fffbeb;--priority-p2:#3b82f6;--priority-p2-bg:#eff6ff;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--spacing-2xl:48px;--font-family:"Inter", "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;--font-size-xs:12px;--font-size-sm:14px;--font-size-base:16px;--font-size-lg:18px;--font-size-xl:24px;--font-size-2xl:32px;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--transition-fast:.15s ease;--transition-normal:.25s ease;--transition-slow:.4s ease}[data-theme=dark]{--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-card:#1e293b;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--accent:#2dd4bf;--accent-hover:#14b8a6;--accent-light:#1a3a38;--accent-gradient:linear-gradient(135deg, #2dd4bf, #22d3ee);--success-bg:#052e16;--danger-bg:#450a0a;--warning-bg:#451a03;--border:#334155;--shadow:0 1px 3px #0000004d;--shadow-md:0 4px 12px #0000004d;--shadow-lg:0 8px 24px #0006;--priority-p0-bg:#450a0a;--priority-p1-bg:#451a03;--priority-p2-bg:#1e3a5f}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-tap-highlight-color:transparent;font-size:16px}body{font-family:var(--font-family);background-color:var(--bg-secondary);color:var(--text-primary);min-height:100vh;transition:background-color var(--transition-normal), color var(--transition-normal);line-height:1.6}#root{flex-direction:column;min-height:100vh;display:flex}a{color:var(--accent);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--accent-hover)}img{max-width:100%;height:auto}.app-container{flex-direction:column;flex:1;display:flex}.page-container{padding:var(--spacing-md);flex:1;width:100%;max-width:960px;margin:0 auto;padding-bottom:80px}.header{background:var(--bg-card);border-bottom:1px solid var(--border);padding:var(--spacing-md) var(--spacing-md);z-index:100;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:background var(--transition-normal);background:#ffffffe6;justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}[data-theme=dark] .header{background:#0f172ae6}.header-logo{align-items:center;gap:var(--spacing-sm);font-size:var(--font-size-lg);color:var(--text-primary);font-weight:700;display:flex}.header-logo .logo-icon{font-size:24px}.header-actions{gap:var(--spacing-sm);display:flex}.bottom-nav{background:var(--bg-card);border-top:1px solid var(--border);padding:var(--spacing-sm) 0;padding-bottom:max(var(--spacing-sm), env(safe-area-inset-bottom));z-index:100;transition:background var(--transition-normal);justify-content:space-around;display:flex;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -2px 10px #0000000d}.nav-item{font-size:var(--font-size-xs);color:var(--text-muted);cursor:pointer;padding:var(--spacing-xs) var(--spacing-md);border-radius:var(--radius-sm);transition:all var(--transition-fast);flex-direction:column;align-items:center;gap:2px;min-width:64px;text-decoration:none;display:flex}.nav-item:hover,.nav-item.active{color:var(--accent)}.nav-item .nav-icon{font-size:22px}.card{background:var(--bg-card);border-radius:var(--radius-md);padding:var(--spacing-md);box-shadow:var(--shadow);border:1px solid var(--border);transition:all var(--transition-normal)}.card:hover{box-shadow:var(--shadow-md)}.card-clickable{cursor:pointer}.card-clickable:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.priority-badge{border-radius:var(--radius-full);font-size:var(--font-size-xs);letter-spacing:.5px;align-items:center;padding:2px 10px;font-weight:600;display:inline-flex}.priority-badge.p0{background:var(--priority-p0);color:#fff}.priority-badge.p1{background:var(--priority-p1);color:#fff}.priority-badge.p2{background:var(--priority-p2);color:#fff}.progress-bar{background:var(--border);border-radius:var(--radius-full);width:100%;height:6px;overflow:hidden}.progress-bar-fill{border-radius:var(--radius-full);background:var(--accent-gradient);height:100%;transition:width var(--transition-slow);min-width:0}.progress-bar-large{height:10px}.btn{justify-content:center;align-items:center;gap:var(--spacing-sm);border-radius:var(--radius-md);font-family:var(--font-family);font-size:var(--font-size-base);cursor:pointer;transition:all var(--transition-fast);border:none;min-height:44px;padding:12px 24px;font-weight:600;text-decoration:none;display:inline-flex}.btn-primary{background:var(--accent-gradient);color:#fff}.btn-primary:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 12px #0ea5a04d}.btn-primary:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.btn-secondary{background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--accent-light);border-color:var(--accent)}.btn-danger{background:var(--danger);color:#fff}.btn-success{background:var(--success);color:#fff}.btn-full{width:100%}.btn-sm{font-size:var(--font-size-sm);min-height:36px;padding:8px 16px}.icon-btn{border-radius:var(--radius-md);cursor:pointer;width:40px;height:40px;color:var(--text-secondary);transition:all var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;font-size:20px;display:flex}.icon-btn:hover{background:var(--accent-light);color:var(--accent)}.chapter-grid{gap:var(--spacing-md);grid-template-columns:1fr;display:grid}@media (width>=768px){.chapter-grid{grid-template-columns:repeat(2,1fr)}}@media (width>=1024px){.chapter-grid{grid-template-columns:repeat(3,1fr)}}.chapter-card{position:relative;overflow:hidden}.chapter-card .card-header{margin-bottom:var(--spacing-sm);justify-content:space-between;align-items:flex-start;display:flex}.chapter-card .card-title{font-size:var(--font-size-base);color:var(--text-primary);flex:1;font-weight:600;line-height:1.4}.chapter-card .card-topic{font-size:var(--font-size-xs);color:var(--text-muted);margin-bottom:var(--spacing-xs)}.chapter-card .card-stats{font-size:var(--font-size-sm);color:var(--text-secondary);margin-top:var(--spacing-sm);justify-content:space-between;align-items:center;display:flex}.question-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:var(--spacing-lg);margin-bottom:var(--spacing-md);border:1px solid var(--border)}.question-number{font-size:var(--font-size-sm);color:var(--text-muted);margin-bottom:var(--spacing-sm);align-items:center;gap:var(--spacing-sm);display:flex}.question-content{font-size:var(--font-size-base);margin-bottom:var(--spacing-md);color:var(--text-primary);line-height:1.8}.options{gap:var(--spacing-sm);flex-direction:column;display:flex}.option{align-items:center;gap:var(--spacing-md);width:100%;padding:var(--spacing-md);border:2px solid var(--border);border-radius:var(--radius-md);background:var(--bg-card);cursor:pointer;transition:all var(--transition-fast);font-family:var(--font-family);font-size:var(--font-size-base);text-align:left;min-height:48px;color:var(--text-primary);display:flex}.option:hover:not(:disabled),.option.selected{border-color:var(--accent);background:var(--accent-light)}.option.correct{border-color:var(--success);background:var(--success-bg)}.option.wrong{border-color:var(--danger);background:var(--danger-bg)}.option:disabled{cursor:not-allowed;opacity:.8}.option-key{background:var(--bg-secondary);width:32px;height:32px;font-weight:600;font-size:var(--font-size-sm);transition:background var(--transition-fast);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.option.selected .option-key{background:var(--accent);color:#fff}.option.correct .option-key{background:var(--success);color:#fff}.option.wrong .option-key{background:var(--danger);color:#fff}.option-text{flex:1;line-height:1.5}.answer-feedback{border-radius:var(--radius-md);padding:var(--spacing-md);margin-top:var(--spacing-md);animation:.3s slideDown}.answer-feedback.correct{background:var(--success-bg);border:1px solid var(--success)}.answer-feedback.wrong{background:var(--danger-bg);border:1px solid var(--danger)}.feedback-header{align-items:center;gap:var(--spacing-sm);font-weight:600;font-size:var(--font-size-lg);margin-bottom:var(--spacing-sm);display:flex}.feedback-explanation{font-size:var(--font-size-sm);color:var(--text-secondary);white-space:pre-line;line-height:1.8}.feedback-tags{gap:var(--spacing-xs);margin-top:var(--spacing-sm);flex-wrap:wrap;display:flex}.feedback-tag{border-radius:var(--radius-full);font-size:var(--font-size-xs);background:var(--accent-light);color:var(--accent);padding:2px 8px;display:inline-block}.knowledge-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:var(--spacing-lg);margin-bottom:var(--spacing-md);border:1px solid var(--border);border-left:4px solid var(--accent)}.knowledge-card h2{font-size:var(--font-size-lg);margin-bottom:var(--spacing-md)}.knowledge-card h3{font-size:var(--font-size-base);margin-top:var(--spacing-md);margin-bottom:var(--spacing-sm)}.knowledge-card p{margin-bottom:var(--spacing-sm);line-height:1.8}.knowledge-card ul,.knowledge-card ol{padding-left:var(--spacing-lg);margin-bottom:var(--spacing-sm)}.knowledge-card li{margin-bottom:var(--spacing-xs);line-height:1.8}.recall-card{background:var(--warning-bg);border:1px solid var(--warning);border-radius:var(--radius-md);padding:var(--spacing-md);margin:var(--spacing-md) 0}.recall-question{margin-bottom:var(--spacing-sm);font-weight:600}.recall-reveal-btn{background:var(--warning);color:#fff;border-radius:var(--radius-sm);cursor:pointer;font-family:var(--font-family);transition:opacity var(--transition-fast);border:none;padding:8px 16px;font-weight:600}.recall-reveal-btn:hover{opacity:.9}.recall-answer{margin-top:var(--spacing-sm);padding:var(--spacing-md);background:var(--bg-card);border-radius:var(--radius-sm);border:1px solid var(--border);line-height:1.8}.score-card{text-align:center;padding:var(--spacing-xl)}.score-value{background:var(--accent-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:48px;font-weight:700}.score-label{font-size:var(--font-size-sm);color:var(--text-secondary);margin-top:var(--spacing-xs)}.stats-grid{gap:var(--spacing-md);grid-template-columns:repeat(2,1fr);display:grid}.stats-card{text-align:center;padding:var(--spacing-md)}.stats-card .stats-value{font-size:var(--font-size-xl);color:var(--accent);font-weight:700}.stats-card .stats-label{font-size:var(--font-size-xs);color:var(--text-secondary);margin-top:var(--spacing-xs)}.empty-state{text-align:center;padding:var(--spacing-2xl) var(--spacing-md);color:var(--text-muted)}.empty-state .empty-icon{margin-bottom:var(--spacing-md);font-size:48px}.section-title{font-size:var(--font-size-lg);margin-bottom:var(--spacing-md);align-items:center;gap:var(--spacing-sm);font-weight:600;display:flex}.filter-bar{gap:var(--spacing-sm);margin-bottom:var(--spacing-md);-webkit-overflow-scrolling:touch;display:flex;overflow-x:auto}.filter-chip{border-radius:var(--radius-full);font-size:var(--font-size-sm);background:var(--bg-card);border:1px solid var(--border);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;font-family:var(--font-family);color:var(--text-secondary);align-items:center;padding:6px 14px;display:inline-flex}.filter-chip:hover,.filter-chip.active{background:var(--accent-light);border-color:var(--accent);color:var(--accent)}.select-field{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--bg-card);color:var(--text-primary);font-family:var(--font-family);font-size:var(--font-size-base);cursor:pointer;min-height:44px;transition:border-color var(--transition-fast);appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280'%3E%3Cpath d='M6 8.825L.4 3.225l.85-.85L6 7.125l4.75-4.75.85.85z'/%3E%3C/svg%3E");background-position:right 12px center;background-repeat:no-repeat;padding:10px 36px 10px 14px}[data-theme=dark] .select-field{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8'%3E%3Cpath d='M6 8.825L.4 3.225l.85-.85L6 7.125l4.75-4.75.85.85z'/%3E%3C/svg%3E")}.select-field:focus{border-color:var(--accent);outline:none}.lesson-progress{background:var(--bg-card);padding:var(--spacing-md);margin-bottom:var(--spacing-md);border-radius:var(--radius-md);border:1px solid var(--border)}.lesson-progress-title{font-size:var(--font-size-sm);color:var(--text-secondary);margin-bottom:var(--spacing-sm);justify-content:space-between;display:flex}.sort-item{align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);background:var(--bg-card);border:2px solid var(--border);border-radius:var(--radius-md);margin-bottom:var(--spacing-sm);transition:all var(--transition-fast);display:flex}.sort-item .sort-handle{color:var(--text-muted);cursor:grab;font-size:18px}.sort-item .sort-arrows{flex-direction:column;gap:2px;display:flex}.sort-arrow-btn{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-secondary);cursor:pointer;width:28px;height:28px;color:var(--text-secondary);transition:all var(--transition-fast);justify-content:center;align-items:center;font-size:14px;display:flex}.sort-arrow-btn:hover{background:var(--accent-light);color:var(--accent);border-color:var(--accent)}.match-grid{gap:var(--spacing-md);flex-direction:column;display:flex}.match-row{align-items:center;gap:var(--spacing-md);display:flex}.match-left{padding:var(--spacing-md);background:var(--bg-secondary);border-radius:var(--radius-md);flex:1;font-weight:500}.match-right{flex:1}.loading{padding:var(--spacing-2xl);color:var(--text-muted);justify-content:center;align-items:center;display:flex}.loading-spinner{border:3px solid var(--border);border-top-color:var(--accent);width:24px;height:24px;margin-right:var(--spacing-sm);border-radius:50%;animation:.8s linear infinite spin;display:inline-block}.theme-toggle{padding:var(--spacing-md);cursor:pointer;justify-content:space-between;align-items:center;display:flex}.toggle-switch{background:var(--border);width:52px;height:28px;transition:background var(--transition-fast);cursor:pointer;border:none;border-radius:14px;position:relative}.toggle-switch.active{background:var(--accent)}.toggle-switch:after{content:"";width:22px;height:22px;transition:transform var(--transition-fast);background:#fff;border-radius:50%;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #0003}.toggle-switch.active:after{transform:translate(24px)}.wrong-question-card{margin-bottom:var(--spacing-md)}.wrong-question-card .wrong-info{margin-top:var(--spacing-sm);font-size:var(--font-size-sm);color:var(--text-secondary);justify-content:space-between;align-items:center;display:flex}.wrong-count-badge{border-radius:var(--radius-full);font-size:var(--font-size-xs);align-items:center;gap:4px;padding:2px 8px;font-weight:600;display:inline-flex}.wrong-count-badge.danger{background:var(--danger-bg);color:var(--danger)}.wrong-count-badge.warning{background:var(--warning-bg);color:var(--warning)}.status-badge{border-radius:var(--radius-full);font-size:var(--font-size-xs);align-items:center;padding:2px 10px;font-weight:500;display:inline-flex}.status-badge.unmastered{background:var(--danger-bg);color:var(--danger)}.status-badge.confirming{background:var(--warning-bg);color:var(--warning)}.status-badge.mastered{background:var(--success-bg);color:var(--success)}.status-badge.conquered{background:var(--accent-light);color:var(--accent)}.continue-learning{background:var(--accent-light);border:1px solid var(--accent);border-radius:var(--radius-md);padding:var(--spacing-md);margin-bottom:var(--spacing-lg);cursor:pointer;transition:all var(--transition-fast);justify-content:space-between;align-items:center;display:flex}.continue-learning:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.due-reminder{background:var(--warning-bg);border:1px solid var(--warning);border-radius:var(--radius-md);padding:var(--spacing-md);margin-bottom:var(--spacing-md);align-items:center;gap:var(--spacing-sm);display:flex}.chart-container{width:100%;min-height:300px}.streak-badge{align-items:center;gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm);background:var(--warning-bg);border-radius:var(--radius-full);font-size:var(--font-size-sm);color:var(--warning);font-weight:600;display:inline-flex}@keyframes slideDown{0%{opacity:0;max-height:0;transform:translateY(-10px)}to{opacity:1;max-height:1000px;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.fade-in{animation:fadeIn var(--transition-normal)}@media (width>=768px){.page-container{padding:var(--spacing-lg);padding-bottom:80px}.stats-grid{grid-template-columns:repeat(4,1fr)}}@media (width>=1024px){.page-container{max-width:960px}}.judge-options{gap:var(--spacing-md);grid-template-columns:1fr 1fr;display:grid}.judge-btn{justify-content:center;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-lg);border:2px solid var(--border);border-radius:var(--radius-md);background:var(--bg-card);cursor:pointer;font-family:var(--font-family);font-size:var(--font-size-lg);transition:all var(--transition-fast);min-height:60px;color:var(--text-primary);font-weight:600;display:flex}.judge-btn:hover:not(:disabled),.judge-btn.selected{border-color:var(--accent);background:var(--accent-light)}.judge-btn.correct-result{border-color:var(--success);background:var(--success-bg)}.judge-btn.wrong-result{border-color:var(--danger);background:var(--danger-bg)}.judge-btn:disabled{cursor:not-allowed;opacity:.8}.settings-group{margin-bottom:var(--spacing-lg)}.settings-item{padding:var(--spacing-md) 0;border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;display:flex}.settings-item:last-child{border-bottom:none}.settings-label{font-weight:500}.settings-desc{font-size:var(--font-size-sm);color:var(--text-secondary)}