@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";.coef-box:focus{outline:none;border-color:#6aa6ff;box-shadow:0 0 0 3px #6aa6ff33}@font-face{font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/static/assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/static/assets/KaTeX_AMS-Regular-DRggAlZN.ttf) format("truetype")}@font-face{font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/static/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/static/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/static/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf) format("truetype")}@font-face{font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/static/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/static/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf) format("truetype")}@font-face{font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/static/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/static/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/static/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf) format("truetype")}@font-face{font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/static/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/static/assets/KaTeX_Fraktur-Regular-CB_wures.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/static/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/static/assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/static/assets/KaTeX_Main-Bold-waoOVXN0.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/static/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/static/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/static/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/static/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/static/assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/static/assets/KaTeX_Main-Italic-3WenGoN9.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/static/assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/static/assets/KaTeX_Main-Regular-ypZvNtVU.ttf) format("truetype")}@font-face{font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/static/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/static/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/static/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf) format("truetype")}@font-face{font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/static/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/static/assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/static/assets/KaTeX_Math-Italic-flOr_0UB.ttf) format("truetype")}@font-face{font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/static/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/static/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/static/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf) format("truetype")}@font-face{font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/static/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/static/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/static/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf) format("truetype")}@font-face{font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/static/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/static/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf) format("truetype")}@font-face{font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/static/assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/static/assets/KaTeX_Script-Regular-C5JkGWo-.ttf) format("truetype")}@font-face{font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/static/assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/static/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf) format("truetype")}@font-face{font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/static/assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/static/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf) format("truetype")}@font-face{font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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) format("woff2"),url(/static/assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/static/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf) format("truetype")}@font-face{font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/static/assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/static/assets/KaTeX_Size4-Regular-DWFBv043.ttf) format("truetype")}@font-face{font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/static/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/static/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.22"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);border:0;height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.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;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.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 .clap,.katex .llap,.katex .rlap{position:relative;width:0}.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;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.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:.8333333333em}.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:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.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:1.6666666667em}.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:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.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:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.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:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.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:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.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:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.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:.4166666667em}.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:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.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:.8333333333em}.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:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.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:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.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:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.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:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.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:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.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{display:inline-block;width:.12em}.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{display:inline-block;min-width:1px}.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;fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.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{border:.04em solid;box-sizing:border-box}.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{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;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{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.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{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}.simple-header{padding:1.5rem 2rem;background-color:#fff}.simple-header-logo{font-weight:700;font-size:1.2rem;text-decoration:none;color:#1c1e21}.login-page-container{display:flex;justify-content:center;align-items:flex-start;min-height:90vh;background-color:#fdfdfd;padding-top:8vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.login-box{max-width:380px;width:100%;text-align:center}.user-display{display:inline-block;background-color:#f0f0f0;padding:6px 12px;border-radius:15px;margin-bottom:1rem;font-size:.9rem;cursor:pointer;border:1px solid #e0e0e0}.login-title{font-size:2.2rem;font-weight:700;color:#1c1e21;margin:0}.login-subtitle{font-size:1rem;color:#777;margin-top:.5rem;margin-bottom:2.5rem}.social-buttons-container{display:flex;flex-direction:column;gap:.75rem}.social-button{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:10px;background-color:#fff;border:1px solid #e0e0e0;border-radius:6px;font-size:.9rem;font-weight:500;cursor:pointer;transition:background-color .2s}.social-button:hover{background-color:#f7f7f7}.social-button img{width:18px;height:18px}.divider{display:flex;align-items:center;text-align:center;color:#ccc;margin:1.5rem 0;font-size:.8rem;font-weight:500}.divider:before,.divider:after{content:"";flex:1;border-bottom:1px solid #e8e8e8}.divider span{padding:0 10px}.login-form{display:flex;flex-direction:column;text-align:left}.input-label{font-size:.85rem;font-weight:600;margin-bottom:.5rem}.input-field{width:100%;padding:10px 12px;border:1px solid #ccc;border-radius:6px;font-size:1rem;box-sizing:border-box;margin-bottom:1rem}.input-field:focus{border-color:#0d6efd;outline:none}.submit-button{width:100%;padding:12px;background-color:#0d6efd;color:#fff;border:none;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:background-color .2s}.submit-button:hover{background-color:#0b5ed7}.error-message{color:#d93025;background-color:#fbe9e7;border:1px solid #f9c6c2;border-radius:6px;padding:10px;margin-bottom:1rem;text-align:center;font-size:.9rem}.legal-text{font-size:.8rem;color:#aaa;margin-top:2rem;line-height:1.5}.legal-text a{color:#aaa;text-decoration:underline}.form-row{display:flex;gap:1rem}.form-row>div{flex:1}select.input-field{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url(data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23007CB2%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E);background-repeat:no-repeat;background-position:right 1rem center;background-size:.65em auto;padding-right:2.5rem}.link-button{background:none;border:none;color:#0d6efd;text-decoration:underline;cursor:pointer;padding:0;font-size:.85rem;margin-top:-.5rem;margin-bottom:1.5rem;align-self:flex-start}.sub-form{padding:1rem;margin-bottom:1.5rem;border:1px solid #e0e0e0;border-radius:6px;background-color:#fafafa}.submit-button.secondary{background-color:#e9ecef;color:#495057}.submit-button.secondary:hover{background-color:#dee2e6}.success-message{color:#155724;background-color:#d4edda;border:1px solid #c3e6cb;border-radius:6px;padding:10px;margin-bottom:1rem;text-align:center;font-size:.9rem}:root{--main-green: #508362;--progress-bg: #e7f5ed;--progress-inner: linear-gradient(90deg, #fff, #a4dfbd 60%)}.topbar-root{background:var(--main-green);color:#fff;padding:8px 24px;min-height:68px;display:flex;align-items:center;justify-content:space-between;position:relative;z-index:100;gap:16px}.topbar-left-section,.topbar-center-section,.topbar-right-section{display:flex;align-items:center}.topbar-left-section{gap:16px}.topbar-right-section{gap:20px}.topbar-desktop-logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:#fff;font-size:1.4rem;font-weight:600}.hamburger{display:none;background:transparent;border:none;cursor:pointer;padding:6px 3px;flex-direction:column;gap:4px}.hamburger div{width:26px;height:3px;border-radius:2px;background:#fff}.topbar-mobile-logo{display:none}.topbar-quiz-info{text-align:center}.topbar-title{font-weight:700;font-size:1.2rem}.topbar-question{font-size:.95rem;opacity:.9}.user-name,.user-dropdown-arrow{transition:opacity .2s}@media (max-width: 768px){.topbar-root{display:grid;grid-template-columns:auto 1fr auto;padding:8px 16px}.hamburger{display:flex}.topbar-desktop-logo{display:none}.topbar-mobile-logo{display:inline-flex}.topbar-center-section{justify-content:center}.user-name,.user-dropdown-arrow{display:none}.topbar-user{padding:6px;background:transparent}@media (max-width: 400px){.topbar-progress{display:none}}}:root{--aleks-card-bg: #ffffff;--aleks-border: #e4e9f0;--aleks-gray-panel-bg: #eaeff4;--aleks-icon-primary: #00a9b5;--aleks-icon-secondary: #5f6b7a;--aleks-text: #2e3440;--aleks-focus: #4c8bf5}.aleks-container{display:flex;align-items:flex-start;gap:16px;margin-top:1rem}#math-field{font-size:24px;padding:15px 20px;border:2px solid var(--aleks-border);border-radius:12px;min-width:400px;min-height:58px;color:var(--aleks-text);background-color:var(--aleks-card-bg);box-shadow:0 4px 12px #0000000a}#math-field:focus-within{border-color:var(--aleks-focus)}#math-field::part(virtual-keyboard-toggle),#math-field::part(menu-toggle){display:none!important}@media (max-width: 768px){.aleks-container{flex-direction:column}#math-field{min-width:0;width:100%;box-sizing:border-box}.aleks-toolbar{width:100%;box-sizing:border-box}.function-panel{justify-content:flex-start;gap:8px}}math-field[virtual-keyboard-mode=off]::part(virtual-keyboard){display:none}@media (max-width: 768px){math-field[data-toolbar-preset=numerical_only]::part(virtual-keyboard){display:none}math-field[data-toolbar-preset=numerical_only]::part(numeric-keyboard){display:block}}.inline-blanks .chem-box{display:inline-block;vertical-align:middle;margin:0 6px;padding:6px 8px;border:2px solid #cbd5e1;border-radius:10px;font-size:1.05rem;text-align:center;line-height:1.2}.inline-blanks .chem-box:disabled{opacity:.6}.aleks-toolbar{width:180px;background-color:var(--aleks-card-bg);border:1px solid var(--aleks-border);border-radius:12px;box-shadow:0 4px 12px #0000000a;overflow:hidden;display:flex;flex-direction:column}.function-panel{display:flex;flex-wrap:wrap;justify-content:space-between;padding:12px;row-gap:12px}.utility-panel{display:flex;justify-content:space-evenly;background-color:var(--aleks-gray-panel-bg);padding:8px;border-top:1px solid var(--aleks-border)}.function-panel:empty+.utility-panel{border-top:none}.icon-button{background:none;border:none;border-radius:8px;padding:0;cursor:pointer;transition:background-color .2s;width:48px;height:48px;display:flex;justify-content:center;align-items:center}.icon-button:hover{background-color:#0000000d}.icon-button svg{width:32px;height:32px}body,html{background:#f5f7fa;min-height:100vh;font-family:Inter,Arial,sans-serif}.practice-root{min-height:100vh;display:flex;flex-direction:column;background:#f6f8fa}.practice-main{flex:1;display:flex;justify-content:center;align-items:center}.practice-progress-bar{width:100vw;background:#37796c;color:#fff;font-weight:700;font-size:15px;padding:8px 0 0 8px;position:fixed;top:0;left:0;z-index:10}.practice-progress-bar-label{margin-left:8px}.practice-progress-bar-track{width:98vw;height:5px;background:#e9ecef;border-radius:4px;margin:5px 0 0 8px;overflow:hidden}.practice-progress-bar-fill{background:#7ed6a8;height:100%;border-radius:4px;transition:width .3s}.practice-center{flex:1;display:flex;justify-content:center;align-items:center;margin-top:90px}.exercise-card-large{background:#fff;border-radius:15px;max-width:780px;width:100%;padding:48px 54px 42px;box-shadow:0 2px 16px #3c3c3c12;box-sizing:border-box}.exercise-card-header{background:#92ddb8;border-top-left-radius:12px;border-top-right-radius:12px;padding:15px 20px;font-weight:700;font-size:19px;margin-bottom:24px}.exercise-input-large{width:100%;font-size:24px;padding:12px 15px;border:2px solid #b8dafe;border-radius:8px;margin-bottom:18px;background:#f8fdf8;outline:none;box-sizing:border-box;display:block}.exercise-input-large:focus{border:2px solid #82bbeb;background:#f3fcf3}.exercise-buttons-row{display:flex;gap:12px;margin-top:12px;justify-content:left}.btn-footer{font-size:18px;border:none;padding:11px 26px;border-radius:8px;background:#e0e3e6;margin-right:0;cursor:pointer;transition:background .2s}.btn-footer.btn-green{background:#b3e7c8;color:#1c5746;font-weight:700}.btn-footer:disabled{opacity:.5;cursor:not-allowed}.btn-footer:hover{background:#c8f5e0}.practice-footer{width:100vw;text-align:center;font-size:14px;color:#aaa;position:fixed;bottom:0;left:0;background:transparent;padding-bottom:7px;z-index:20}.practice-loading{font-size:26px;text-align:center;margin-top:90px}.result-box{margin:90px auto;background:#fff;padding:55px 70px;border-radius:15px;box-shadow:0 2px 16px #3c3c3c1a;text-align:center}.exercise-container{background:#fff;border-radius:16px;box-shadow:0 4px 18px #0002;max-width:750px;width:100%;min-width:410px;padding:2.8rem 2.7rem 2rem}@media (max-width: 900px){.exercise-container{max-width:99vw;min-width:unset;padding:2rem .6rem 1.5rem}}.dashboard-root{--color-primary: #4f46e5;--color-primary-hover: #4338ca;--color-primary-50: #eef2ff;--color-primary-100: #e0e7ff;--color-accent: #8b5cf6}.dashboard-root .btn:focus-visible,.dashboard-root .link-underline:focus-visible,.dashboard-root .back-chip:focus-visible,.dashboard-root .subject-hub-card:focus-visible,.dashboard-root .series-item:focus-visible{outline:3px solid rgba(79,70,229,.35);outline-offset:2px}.dashboard-root .page-hero{margin-bottom:1rem}.dashboard-root .page-hero__title{font-size:1.9rem;font-weight:800;margin:0 0 .25rem}.dashboard-root .page-hero__subtitle{font-size:1.08rem;color:var(--color-text-secondary);margin:0}.dashboard-root .text-gradient{background:linear-gradient(90deg,var(--color-primary),var(--color-accent));-webkit-background-clip:text;background-clip:text;color:transparent}.dashboard-root .back-chip{display:inline-flex;align-items:center;gap:.5rem;padding:.35rem .75rem;border-radius:999px;background:var(--color-gray-100);color:#111827;cursor:pointer;-webkit-user-select:none;user-select:none;margin-bottom:.75rem}.dashboard-root .back-chip:hover{background:#e7eaf1}.dashboard-root .subject-hero{display:flex;align-items:center;gap:1rem;padding:1rem 1.25rem;border:1px solid var(--card-border);border-radius:1rem;background:linear-gradient(180deg,#fff,#f8fafc);box-shadow:var(--card-shadow);margin-bottom:1rem}.dashboard-root .subject-hero__icon img{width:42px;height:42px}.dashboard-root .subject-hero h1{margin:0 0 .25rem;font-size:1.55rem}.dashboard-root .choice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;margin-top:1rem}.dashboard-root .option-card{position:relative;text-align:left;border:1px solid var(--card-border);border-radius:1rem;padding:1.25rem 1.25rem 1.25rem 4.25rem;background:#fff;box-shadow:var(--card-shadow);cursor:pointer;transition:transform .15s ease,box-shadow .2s ease}.dashboard-root .option-card:hover{transform:translateY(-2px);box-shadow:0 10px 30px #00000014}.dashboard-root .option-card__title{font-weight:700;font-size:1.05rem}.dashboard-root .option-card__subtitle{margin-top:.25rem;font-size:.95rem;color:var(--color-text-secondary)}.dashboard-root .option-card--primary{border-color:#c7d2fe;background:linear-gradient(180deg,#ffffff,var(--color-primary-50))}.dashboard-root .option-card--success{border-color:#bbf7d0;background:linear-gradient(180deg,#fff,#ecfdf5)}.dashboard-root .option-card--neutral{background:#fff}.dashboard-root .option-card:before{content:"";position:absolute;top:14px;left:14px;width:40px;height:40px;opacity:.12;pointer-events:none;background-size:40px 40px;background-repeat:no-repeat}.dashboard-root .option-card--primary:before{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%238b5cf6'><path d='M12 2l2.2 5.6L20 9l-5 3.9L16.4 19 12 15.8 7.6 19 9 12.9 4 9l5.8-1.4L12 2z'/></svg>")}.dashboard-root .option-card--success:before{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2310b981' stroke-width='2'><circle cx='12' cy='12' r='9'/><circle cx='12' cy='12' r='5'/><circle cx='12' cy='12' r='2'/></svg>")}.dashboard-root .option-card--neutral:before{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'><rect x='6' y='5' width='12' height='14' rx='2'/><path d='M9 3h6v4H9z'/><path d='M8 11h8M8 15h8'/></svg>")}.dashboard-root .exam-series-list{margin-top:1.25rem;border-top:1px solid var(--card-border);padding-top:1.25rem}.dashboard-root .section-title{font-weight:700;color:#4b5563;margin:0 0 .75rem}.dashboard-root .series-card{display:grid;grid-template-columns:1fr auto;gap:1rem;align-items:center;border:1px solid var(--card-border);border-radius:1rem;padding:1rem 1.25rem;background:#fff;box-shadow:var(--card-shadow);margin-bottom:.75rem}.dashboard-root .series-card__title{font-weight:700;font-size:1.08rem;margin-bottom:.25rem}.dashboard-root .series-card__desc{color:#64748b;font-size:.95rem}.dashboard-root .launch-options{border-top:1px dashed var(--card-border);padding-top:.75rem}.dashboard-root .launch-options__label{font-size:.9rem;color:#374151;margin-bottom:.5rem}.dashboard-root .launch-options__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.5rem;margin-bottom:.25rem}@media (prefers-color-scheme: dark){.dashboard-root{--color-primary: #8b5cf6;--color-primary-hover: #7c3aed}.dashboard-root .option-card--primary{background:linear-gradient(180deg,#0f152b,#8b5cf614)}.dashboard-root .option-card--success{background:linear-gradient(180deg,#0f152b,#10b98114)}.dashboard-root .text-gradient{background:linear-gradient(90deg,#a78bfa,#60a5fa);-webkit-background-clip:text;background-clip:text;color:transparent}}@font-face{font-display:"swap";font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/static/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/static/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/static/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/static/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/static/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/static/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/static/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/static/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/static/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2")}@font-face{font-display:"swap";font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/static/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2")}:root{--ML__static-fonts:true}.ML__container{min-height:auto!important;--_hue:var(--hue,212);--_placeholder-color:var(--placeholder-color,hsl(var(--_hue),40%,49%));--_placeholder-opacity:var(--placeholder-opacity,.4);--_text-font-family:var(--text-font-family,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Roboto","Oxygen","Ubuntu","Cantarell","Fira Sans","Droid Sans","Helvetica Neue",sans-serif)}.ML__sr-only{height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;clip:rect(0,0,0,0);border:0;clip-path:inset(50%);white-space:nowrap}.ML__base,.ML__is-inline{display:inline-block}.ML__base{border:0;box-sizing:content-box;cursor:text;font-family:inherit;font-style:inherit;font-weight:inherit;margin:0;outline:0;padding:0;position:relative;text-decoration:none;vertical-align:baseline;visibility:inherit;width:min-content}.ML__strut,.ML__strut--bottom{display:inline-block;min-height:.5em}.ML__small-delim{font-family:KaTeX_Main}.ML__text{font-family:var(--_text-font-family);white-space:pre}.ML__cmr{font-family:KaTeX_Main;font-style:normal}.ML__mathit{font-family:KaTeX_Math;font-style:italic}.ML__mathbf{font-family:KaTeX_Main;font-weight:700}.ML__mathbfit,.lcGreek.ML__mathbf{font-family:KaTeX_Math}.ML__mathbfit{font-style:italic;font-weight:700}.ML__ams,.ML__bb{font-family:KaTeX_AMS}.ML__cal{font-family:KaTeX_Caligraphic}.ML__frak{font-family:KaTeX_Fraktur}.ML__tt{font-family:KaTeX_Typewriter}.ML__script{font-family:KaTeX_Script}.ML__sans{font-family:KaTeX_SansSerif}.ML__series_el,.ML__series_ul{font-weight:100}.ML__series_l{font-weight:200}.ML__series_sl{font-weight:300}.ML__series_sb{font-weight:500}.ML__bold{font-weight:700}.ML__series_eb{font-weight:800}.ML__series_ub{font-weight:900}.ML__series_uc{font-stretch:ultra-condensed}.ML__series_ec{font-stretch:extra-condensed}.ML__series_c{font-stretch:condensed}.ML__series_sc{font-stretch:semi-condensed}.ML__series_sx{font-stretch:semi-expanded}.ML__series_x{font-stretch:expanded}.ML__series_ex{font-stretch:extra-expanded}.ML__series_ux{font-stretch:ultra-expanded}.ML__it{font-style:italic}.ML__shape_ol{-webkit-text-stroke:1px #000;text-stroke:1px #000;color:transparent}.ML__shape_sc{font-variant:small-caps}.ML__shape_sl{font-style:oblique}.ML__emph{color:#bc2612}.ML__emph .ML__emph{color:#0c7f99}.ML__highlight{background:#edd1b0;color:#007cb2}.ML__center{text-align:center}.ML__left{text-align:left}.ML__right{text-align:right}.ML__label_padding{padding:0 .5em}.ML__frac-line{min-height:1px;width:100%}.ML__frac-line:after{background:currentColor;box-sizing:content-box;content:"";display:block;forced-color-adjust:preserve-parent-color;margin-top:max(-1px,-.04em);min-height:max(1px,.04em);-webkit-print-color-adjust:exact;print-color-adjust:exact;transform:translate(0)}@media (forced-colors:active){.ML__frac-line{min-height:0px}}.ML__sqrt,.ML__sqrt-sign{display:inline-block}.ML__sqrt-sign{position:relative}.ML__sqrt-line{display:inline-block;height:max(1px,.04em);width:100%}.ML__sqrt-line:before{background:currentColor;content:"";display:block;forced-color-adjust:preserve-parent-color;margin-top:min(-1px,-.04em);min-height:max(1px,.04em);-webkit-print-color-adjust:exact;print-color-adjust:exact;transform:translate(0)}@media (forced-colors:active){.ML__sqrt-line:after{background:#fff!important}}.ML__sqrt-line:after{border-bottom-width:1px;content:" ";display:block;margin-top:-.1em}.ML__sqrt-index{margin-left:.27777778em;margin-right:-.55555556em}.ML__delim-size1{font-family:KaTeX_Size1}.ML__delim-size2{font-family:KaTeX_Size2}.ML__delim-size3{font-family:KaTeX_Size3}.ML__delim-size4{font-family:KaTeX_Size4}.ML__delim-mult .delim-size1>span{font-family:KaTeX_Size1}.ML__delim-mult .delim-size4>span{font-family:KaTeX_Size4}.ML__accent-body{font-family:KaTeX_Main}.ML__accent-combining-char{left:.24em;position:relative}.ML__latex{direction:ltr;display:inline-block;font-family:inherit;font-size-adjust:none;font-stretch:normal;font-style:normal;font-variant-caps:normal;letter-spacing:normal;line-height:1.2;text-align:left;text-indent:0;text-rendering:auto;word-wrap:normal;forced-color-adjust:preserve-parent-color;text-shadow:none;-webkit-user-select:none;user-select:none;white-space:nowrap;width:min-content;word-spacing:normal}.ML__latex .style-wrap{position:relative}.ML__latex .ML__left-right,.ML__latex .ML__mfrac{display:inline-block}.ML__latex .ML__vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.ML__latex .ML__vlist-r{display:table-row}.ML__latex .ML__vlist{display:table-cell;position:relative;vertical-align:bottom}.ML__latex .ML__vlist>span{display:block;height:0;position:relative}.ML__latex .ML__vlist>span>span{display:inline-block}.ML__latex .ML__vlist>span>.ML__pstrut{overflow:hidden;width:0}.ML__latex .ML__vlist-t2{margin-right:-2px}.ML__latex .ML__vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.ML__latex .ML__msubsup{text-align:left}.ML__latex .ML__negativethinspace{display:inline-block;height:.71em;margin-left:-.16667em}.ML__latex .ML__thinspace{display:inline-block;height:.71em;width:.16667em}.ML__latex .ML__mediumspace{display:inline-block;height:.71em;width:.22222em}.ML__latex .ML__thickspace{display:inline-block;height:.71em;width:.27778em}.ML__latex .ML__enspace{display:inline-block;height:.71em;width:.5em}.ML__latex .ML__quad{display:inline-block;height:.71em;width:1em}.ML__latex .ML__qquad{display:inline-block;height:.71em;width:2em}.ML__latex .ML__llap,.ML__latex .ML__rlap{display:inline-block;position:relative;width:0}.ML__latex .ML__llap>.ML__inner,.ML__latex .ML__rlap>.ML__inner{position:absolute}.ML__latex .ML__llap>.ML__fix,.ML__latex .ML__rlap>.ML__fix{display:inline-block}.ML__latex .ML__llap>.ML__inner{right:0}.ML__latex .ML__rlap>.ML__inner{left:0}.ML__latex .ML__rule{border:0 solid;box-sizing:border-box;display:inline-block;position:relative}.ML__latex .overline .overline-line,.ML__latex .underline .underline-line{width:100%}.ML__latex .overline .overline-line:before,.ML__latex .underline .underline-line:before{border-bottom-style:solid;border-bottom-width:max(1px,.04em);content:"";display:block;-webkit-print-color-adjust:exact;print-color-adjust:exact}.ML__latex .overline .overline-line:after,.ML__latex .underline .underline-line:after{border-bottom-style:solid;border-bottom-width:max(1px,.04em);content:"";display:block;margin-top:-1px;-webkit-print-color-adjust:exact;print-color-adjust:exact}.ML__latex .ML__stretchy{display:block;left:0;overflow:hidden;position:absolute;width:100%}.ML__latex .ML__stretchy:after,.ML__latex .ML__stretchy:before{content:""}.ML__latex .ML__stretchy svg{display:block;height:inherit;position:absolute;width:100%;fill:currentColor;stroke:currentColor;fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.ML__latex .slice-1-of-2{left:0}.ML__latex .slice-1-of-2,.ML__latex .slice-2-of-2{display:inline-flex;overflow:hidden;position:absolute;width:50.2%}.ML__latex .slice-2-of-2{right:0}.ML__latex .slice-1-of-3{left:0;width:25.1%}.ML__latex .slice-1-of-3,.ML__latex .slice-2-of-3{display:inline-flex;overflow:hidden;position:absolute}.ML__latex .slice-2-of-3{left:25%;width:50%}.ML__latex .slice-3-of-3{right:0;width:25.1%}.ML__latex .slice-1-of-1,.ML__latex .slice-3-of-3{display:inline-flex;overflow:hidden;position:absolute}.ML__latex .slice-1-of-1{left:0;width:100%}.ML__latex .ML__nulldelimiter,.ML__latex .ML__op-group{display:inline-block}.ML__latex .ML__op-symbol{position:relative}.ML__latex .ML__op-symbol.ML__small-op{font-family:KaTeX_Size1}.ML__latex .ML__op-symbol.ML__large-op{font-family:KaTeX_Size2}.ML__latex:has(.ML__align_environment),.ML__latex:has(.ML__center_environment),.ML__latex:has(.ML__eqnarray_environment),.ML__latex:has(.ML__gather_environment),.ML__latex:has(.ML__multiline_environment){width:100%}.ML__latex .ML__multiline_environment{display:inline-flex;width:100%}.ML__latex .ML__center_environment{display:inline-flex;justify-content:center;width:100%}.ML__latex .ML__align_environment,.ML__latex .ML__eqnarray_environment,.ML__latex .ML__gather_environment{display:inline-block}.ML__latex .ML__mtable .ML__vertical-separator{box-sizing:border-box;display:inline-block;min-width:1px}.ML__latex .ML__mtable .ML__arraycolsep{display:inline-block}.ML__latex .ML__mtable .col-align-m>.ML__vlist-t{text-align:center}.ML__latex .ML__mtable .col-align-c>.ML__vlist-t{text-align:center}.ML__latex .ML__mtable .col-align-l>.ML__vlist-t{text-align:left}.ML__latex .ML__mtable .col-align-r>.ML__vlist-t{text-align:right}[data-href]{cursor:pointer}.ML__error{background-color:#cc00411a;background-image:radial-gradient(ellipse at center,#cc0041,transparent 70%);background-position:0 100%;background-repeat:repeat-x;background-size:3px 3px;display:inline-block;padding-bottom:3px}.ML__error>.ML__error{background:transparent;padding:0}.ML__placeholder{color:var(--_placeholder-color);font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;opacity:var(--_placeholder-opacity);padding-left:.4ex;padding-right:.4ex}.ML__notation{box-sizing:border-box;line-height:0;position:absolute}.ML__tooltip-container{position:relative;transform:scale(0)}.ML__tooltip-container .ML__tooltip-content{background:var(--tooltip-background-color);border:var(--tooltip-border);border-radius:var(--tooltip-border-radius);display:inline-table;max-width:400px;padding:12px;position:fixed;visibility:hidden;width:max-content;z-index:2;--_selection-color:var(--tooltip-color);box-shadow:var(--tooltip-box-shadow);color:var(--tooltip-color);opacity:0;transition:opacity .15s cubic-bezier(.4,0,1,1)}.ML__tooltip-container .ML__tooltip-content .ML__text{white-space:normal}.ML__tooltip-container .ML__tooltip-content .ML__base{display:contents}.ML__tooltip-container:hover .ML__tooltip-content{font-size:.75em;opacity:1;transform:scale(1) translateY(3em);visibility:visible}:root{--font-sans: "Inter", sans-serif;--color-background: #f9fafb;--color-text-primary: #111827;--color-text-secondary: #6b7280;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--card-background: #ffffff;--card-border: #e5e7eb;--card-shadow: 0 2px 16px #0001}body{font-family:var(--font-sans);background-color:var(--color-background);color:var(--color-text-primary)}.dashboard-root,.profile-wrapper{max-width:1200px;margin:0 auto;padding:2.3rem 1.5rem 3.5rem}.dashboard-grid{display:grid;grid-template-columns:2.5fr 1fr;gap:2.5rem;width:100%}.main-column,.sidebar-column{display:flex;flex-direction:column;gap:2.1rem}.card{background-color:var(--card-background);border:1px solid var(--card-border);border-radius:1.1rem;padding:2.5rem 2.7rem;box-shadow:var(--card-shadow);max-width:100%;margin-bottom:0}.profile-main-card{display:flex;flex-direction:column;gap:1.1rem;padding-bottom:1.1rem;box-shadow:none;border:none;background:transparent}.profile-header-row{display:flex;align-items:center;gap:1.6rem}.profile-avatar{width:60px;height:60px;background:#f3f4f6;border-radius:50%;display:flex;align-items:center;justify-content:center}.profile-fullname{font-size:1.65rem;font-weight:700;color:#111827;margin-bottom:2px}.profile-username{font-size:1.01rem;color:#6b7280;font-family:monospace,monospace;margin-bottom:2px}.profile-desc{color:#52525b;font-size:1.02rem;margin-left:.5rem;margin-top:.5rem}.profile-row{display:flex;align-items:center;min-height:36px;margin-bottom:22px}.profile-row:last-child{margin-bottom:0}.profile-row input{font-size:16px}.profile-link-btn{background:none;border:none;color:#457cb6;cursor:pointer;font-size:15px;font-weight:600;padding:2px 8px;border-radius:3px;transition:background .2s}.profile-link-btn:hover,.profile-link-btn:focus{background:#e8f2ff;outline:none}.profile-row>div:first-child{font-weight:500;color:#374151;min-width:140px;font-size:1.08rem}.profile-row>div:last-child{font-size:1.13rem}.card.profile-main-data{max-width:620px;min-width:370px;margin:0 auto;padding:3.2rem 3.5rem;border-radius:1.2rem;box-shadow:0 2px 16px #0001;background:#fff}.card h3{font-size:2rem;font-weight:700;margin-bottom:2.2rem;letter-spacing:-1px;text-align:left}.sidebar-column{min-width:250px}.sidebar-column .card{padding:2.2rem 1.4rem;border-radius:1rem}.sidebar-column h3{font-size:1.25rem;font-weight:700;margin-bottom:1.1rem}@media (max-width: 900px){.dashboard-grid{grid-template-columns:1fr;gap:1.5rem}.sidebar-column{order:2}.main-column{order:1}.profile-main-data{padding:2.3rem 1rem;min-width:unset}}@media (max-width: 600px){.dashboard-root,.profile-wrapper{padding:1rem .1rem 2rem}.card,.profile-main-data{padding:1.1rem .6rem;min-width:unset;max-width:100vw}.profile-row>div:first-child{min-width:90px}}.hero-welcome{background:var(--card-background);border-radius:.75rem;box-shadow:var(--card-shadow);padding:1.7rem 1.3rem;margin-bottom:.7rem}.hero-welcome h1{font-size:1.6rem;font-weight:700;margin:0}.hero-welcome .enrollment-info{color:var(--color-text-secondary);font-size:1rem;margin-top:.25rem}.btn-start{width:100%;padding:.9rem 1rem;font-size:1.06rem;font-weight:600;color:#fff;background-color:var(--color-primary);border:none;border-radius:.5rem;cursor:pointer;transition:background-color .2s;margin-top:1rem}.btn-start:hover{background-color:var(--color-primary-hover)}.sidebar-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.75rem}.sidebar-list li{display:flex;justify-content:space-between;align-items:center;font-size:.99rem;border-radius:.375rem;transition:background-color .2s;cursor:pointer;padding:.5rem .7rem}.sidebar-list li:hover{background-color:#f3f4f6}.sidebar-list li strong{font-weight:600}.chart-container{position:relative;height:120px;margin-top:1rem;margin-bottom:1rem}.chart-label{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;pointer-events:none}.chart-label .percent{font-size:1.7rem;font-weight:700}.chart-label .text{font-size:.85rem;color:var(--color-text-secondary)}.profile-wrapper,.dashboard-root{max-width:1100px;margin:0 auto;padding:2.2rem 1.2rem 3rem}@media (max-width: 900px){.dashboard-grid{grid-template-columns:1fr}.sidebar-column{margin-top:0!important}}.react-flow{width:100%;height:100%;position:relative;overflow:hidden}.react-flow__container{position:absolute;width:100%;height:100%;top:0;left:0}.react-flow__pane{z-index:1}.react-flow__viewport{transform-origin:0 0;z-index:2;pointer-events:none}.react-flow__renderer{z-index:4}.react-flow__selectionpane{z-index:5}.react-flow .react-flow__edges{pointer-events:none;overflow:visible}.react-flow .react-flow__connectionline{z-index:1001}.react-flow__edge{pointer-events:visibleStroke}.react-flow__edge.inactive{pointer-events:none}@-webkit-keyframes dashdraw{0%{stroke-dashoffset:10}}@keyframes dashdraw{0%{stroke-dashoffset:10}}.react-flow__edge-path{fill:none}.react-flow__edge-textwrapper{pointer-events:all}.react-flow__edge-text{pointer-events:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.react-flow__connection{pointer-events:none}.react-flow__connection .animated{stroke-dasharray:5;-webkit-animation:dashdraw .5s linear infinite;animation:dashdraw .5s linear infinite}.react-flow__connection-path{fill:none}.react-flow__nodes{pointer-events:none;transform-origin:0 0}.react-flow__node{position:absolute;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;pointer-events:all;transform-origin:0 0;box-sizing:border-box}.react-flow__nodesselection{z-index:3;transform-origin:left top;pointer-events:none}.react-flow__nodesselection-rect{position:absolute;pointer-events:all;cursor:-webkit-grab;cursor:grab}.react-flow__handle{position:absolute;pointer-events:none}.react-flow__handle.connectable{pointer-events:all}.react-flow__handle-bottom{top:auto;left:50%;bottom:-4px;transform:translate(-50%)}.react-flow__handle-top{left:50%;top:-4px;transform:translate(-50%)}.react-flow__handle-left{top:50%;left:-4px;transform:translateY(-50%)}.react-flow__handle-right{right:-4px;top:50%;transform:translateY(-50%)}.react-flow__edgeupdater{cursor:move;pointer-events:all}.react-flow__controls{position:absolute;z-index:5;bottom:20px;left:15px}.react-flow__controls-button{width:24px;height:24px;border:none}.react-flow__controls-button svg{width:100%}.react-flow__minimap{position:absolute;z-index:5;bottom:20px;right:15px}.react-flow__attribution{font-size:10px;position:absolute;z-index:1000;background:#ffffff80;padding:2px 3px;color:#999}.react-flow__attribution a{color:#555;text-decoration:none}.react-flow__attribution.top{top:0}.react-flow__attribution.bottom{bottom:0}.react-flow__attribution.left{left:0}.react-flow__attribution.right{right:0}.react-flow__attribution.center{left:50%;transform:translate(-50%)}:root{--font-sans: "Inter", system-ui, sans-serif;--color-background: #f9fafb;--color-text-primary: #111827;--color-text-secondary: #6b7280;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-success: #16a34a;--color-success-light: #dcfce7;--color-accent-green: #8ad7b2;--color-accent-green-dark: #215148;--color-status-mastered: #6B21A8;--color-status-proficient: #A78BFA;--color-status-familiar: #FBBF24;--color-status-attempted: #F97316;--color-gray-100: #f3f4f6;--color-gray-300: #d1d5db;--card-background: #fff;--card-border: #e5e7eb;--card-shadow: 0 4px 16px rgba(0,0,0,.06);--card-radius: 1rem;--card-padding: 2rem}body{font-family:var(--font-sans);background:var(--color-background);color:var(--color-text-primary);margin:0}.card{background:var(--card-background);border:1px solid var(--card-border);border-radius:var(--card-radius);padding:var(--card-padding);box-shadow:var(--card-shadow);position:relative;transition:box-shadow .2s,transform .2s}.exercise-stem,.inline-blanks{white-space:pre-line}.card:hover{box-shadow:0 8px 32px #00000017;transform:translateY(-2px) scale(1.02)}.subject-hub-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:2rem;margin-top:1rem}.subject-hub-card{min-height:160px;cursor:pointer;padding:2rem 1.5rem 1.5rem;text-align:left}.subject-hub-card h3{margin-top:.2em;margin-bottom:.4em;font-size:1.22rem;font-weight:700}.subject-hub-icon{position:absolute;top:18px;left:18px;width:40px;height:40px;pointer-events:none;opacity:.98}.btn{padding:.75rem 1.5rem;font-size:1rem;font-weight:600;border:none;border-radius:.5rem;cursor:pointer;transition:background-color .2s}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-hover)}.btn-success{background:var(--color-accent-green);color:var(--color-accent-green-dark)}.btn-success:hover{background:#a3e6c8}.badge{display:inline-block;padding:.25rem .75rem;background:var(--color-gray-100);border-radius:999px;font-size:.875rem}.exercise-input{font-size:1rem;width:100%;padding:.75rem;border:1px solid var(--color-gray-300);border-radius:.5rem;background:var(--color-background);transition:border-color .2s;box-sizing:border-box}.exercise-input:focus{outline:none;border-color:var(--color-primary)}.dashboard-root,.page-wrapper{max-width:1200px;margin:0 auto;padding:2rem 1.5rem}.dashboard-grid{display:grid;grid-template-columns:2fr 1fr;gap:2rem;align-items:start}.main-column,.sidebar-column{width:100%}.hero-welcome h1{font-size:1.8rem;font-weight:800;margin-bottom:.3em}.hero-welcome p{font-size:1.13rem;color:var(--color-text-secondary);margin-top:0}.enrollment-info{color:var(--color-success);font-size:1rem;margin-bottom:1.2rem}.main-action-card{margin-bottom:2rem}.sidebar-list{list-style:none;margin:0;padding:0}.series-item{display:flex;justify-content:space-between;align-items:center;padding:.5rem .25rem;border-radius:.5rem;cursor:pointer;transition:background .16s}.series-item:hover{background:var(--color-gray-100)}.chart-container{position:relative;width:130px;height:130px;margin:0 auto .8rem}.chart-label{position:absolute;left:0;top:0;width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;pointer-events:none}.chart-label .percent{font-size:2.2rem;font-weight:700;color:var(--color-primary);line-height:1.1}.chart-label .text{font-size:1.1rem;color:var(--color-text-secondary)}.status-dot{display:inline-block;width:12px;height:12px;margin-right:4px;border-radius:2px}.status-dot--mastered{background:var(--color-status-mastered)}.status-dot--proficient{background:var(--color-status-proficient)}.status-dot--familiar{background:var(--color-status-familiar)}.status-dot--attempted{background:var(--color-status-attempted)}@media (max-width: 900px){.dashboard-grid,.subject-hub-grid{grid-template-columns:1fr}.main-column,.sidebar-column{width:100%}}.practice-root{display:flex;flex-direction:column;min-height:100vh;background-color:#f0f2f5}.simulation-page-content{flex-grow:1;padding:1.5rem 2rem;max-width:1400px;width:100%;margin:0 auto;padding-bottom:120px}.carousel-wrapper{position:relative;margin-bottom:2.5rem}.question-carousel{background-color:#fff;border:1px solid #dee2e6;border-radius:8px;padding:.75rem;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}.carousel-toggle-btn{position:absolute;bottom:-25px;left:50%;transform:translate(-50%);width:30px;height:30px;border-radius:50%;border:1px solid #ccc;background:#fff;cursor:pointer;z-index:10;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 5px #0000001a}.carousel-item{display:inline-block;border:2px solid #ccc;border-radius:5px;width:120px;height:80px;margin-right:1rem;cursor:pointer;background-color:#f8f9fa;padding:8px;font-size:.9em;overflow:hidden;text-overflow:ellipsis;white-space:normal}.carousel-item.answered{background-color:#e9ecef;border-style:dashed}.carousel-item.active{border-color:#0d6efd;box-shadow:0 0 5px #0d6efd80}.simulation-main-layout{display:grid;grid-template-columns:1fr auto;gap:1.5rem;align-items:flex-start}.question-content-area{min-width:0;background-color:#fff;padding:2rem;border-radius:8px;border:1px solid #dee2e6}.question-content-area img{max-width:100%;height:auto}.mcq-option-btn.selected{border-color:#0d6efd;background-color:#e0eaff;font-weight:700}.help-toolbar{display:flex;flex-direction:column;gap:1rem;padding-top:1rem}.tool-icon{width:48px;height:48px;background-color:#e9ecef;border:1px solid #dee2e6;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.2rem}.simulation-footer-fixed{position:fixed;bottom:0;left:0;width:100%;background-color:#fff;border-top:1px solid #dee2e6;box-shadow:0 -2px 10px #0000000d;padding:1rem 2rem;display:flex;justify-content:center;align-items:center;z-index:100}.footer-nav-content{display:flex;justify-content:space-between;align-items:center;width:100%;max-width:800px}.simulation-footer-fixed button{padding:10px 20px;font-size:1rem;cursor:pointer;border-radius:20px;border:1px solid #ccc;background-color:#f8f9fa;font-weight:500;transition:background-color .2s}.simulation-footer-fixed button:disabled{opacity:.5;cursor:not-allowed}.simulation-footer-fixed button:hover:not(:disabled){background-color:#e2e6ea}.btn-finish{background-color:#dc3545;color:#fff;font-weight:700;border-color:#dc3545}.btn-finish:hover:not(:disabled){background-color:#c82333}.practice-root{--color-primary: var(--practice-primary, #4f46e5);--color-primary-hover: var(--practice-primary-hover, #4338ca);--color-primary-50: var(--practice-primary-50, #eef2ff);--card-border: var(--card-border, #e5e7eb);--card-background: var(--card-background, #fff);--card-shadow: var(--card-shadow, 0 4px 16px rgba(0,0,0,.06));--color-text-primary: var(--color-text-primary, #111827);--color-text-secondary: var(--color-text-secondary, #6b7280);--color-gray-100: var(--color-gray-100, #f3f4f6);background:#fff;color:var(--color-text-primary)}.practice-main{padding-bottom:88px}.practice-main.aleks-layout{align-items:flex-start;justify-content:flex-start!important}.practice-grid{width:100%;max-width:1120px;margin:40px 0 40px 60px;padding-right:24px;display:grid;grid-template-columns:minmax(560px,760px) 1fr;gap:24px}.practice-aside{position:sticky;top:16px;min-height:200px}.exercise-panel{background:transparent;padding:0;border:none;box-shadow:none}.exercise-panel:hover{transform:none;box-shadow:none}.exercise-stem{font-size:1.2rem;line-height:1.65;margin:8px 0 24px;color:var(--color-text-primary)}.exercise-img{max-width:100%;margin:12px 0;border-radius:8px}.mcq-options-container{margin-top:18px;display:flex;flex-direction:column;gap:10px}.mcq-option-btn{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;text-align:left;font-size:18px;padding:14px 16px;line-height:1.5;background:#fff;border:none;border-radius:14px;box-shadow:0 1px 6px #0000000a;cursor:pointer;transition:all .15s ease}.mcq-option-btn:hover{background:var(--color-primary-50);box-shadow:0 2px 10px #0000000f}.mcq-option-btn:active{transform:translateY(1px)}.mcq-option-btn.is-selected{border-color:var(--color-primary);box-shadow:0 0 0 3px #4f46e51f;background:#fff}.mcq-bullet{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:28px;border-radius:999px;background:#eef2ff;color:#4338ca;font-weight:800}.mcq-text{color:var(--color-text-primary)}.mcq-img{max-height:100px;margin-left:.5rem}.answer-area{display:flex;align-items:flex-start;gap:16px;max-width:600px}.answer-area math-field{flex:1;min-width:350px;min-height:70px;font-size:1.5rem;border:1px solid #d1d5db;border-radius:12px;padding:10px 14px;background-color:#fff;box-shadow:0 1px 2px #0000000d;transition:border-color .2s ease,box-shadow .2s ease}.answer-area math-field:focus-within{border-color:var(--color-primary);box-shadow:0 0 0 3px #4f46e526!important}.math-tools{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;padding:10px;border:1px solid var(--card-border);border-radius:12px;background-color:#f9fafb;box-shadow:0 4px 6px -1px #00000012,0 2px 4px -2px #00000012}.math-tools button{display:flex;align-items:center;justify-content:center;width:52px;height:48px;border:1px solid #e2e8f0;border-radius:10px;background:#fff;cursor:pointer;box-shadow:0 1px 2px #0000000a;transition:background-color .15s ease;font-size:1.2rem;font-weight:600}.math-tools button:hover{background-color:var(--color-primary-50);border-color:#c7d2fe}.math-tools .tool-btn--soft{font-size:20px;font-family:monospace;font-weight:700;color:var(--color-text-secondary)}.banner{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;margin-bottom:12px;font-weight:600}.banner__icon{width:22px;height:22px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center;font-size:14px}.banner--warn{background:#fff7ed;color:#7c2d12;border:1px solid #fed7aa}.banner--warn .banner__icon{background:#fed7aa;color:#7c2d12}.banner--error{background:#fee2e2;color:#7f1d1d;border:1px solid #fecaca}.banner--error .banner__icon{background:#fecaca;color:#7f1d1d}.feedback-banner.correct{margin-top:16px;padding:10px 12px;border-radius:10px;font-weight:700;background:#dcfce7;color:#065f46}.explanation-page{padding:18px 20px;background:#fff;border:1px solid var(--card-border);border-radius:12px;box-shadow:var(--card-shadow)}.exp-ribbon{display:inline-block;background:#10b981;color:#fff;font-weight:800;padding:4px 10px;border-radius:8px;margin-bottom:12px;font-size:.9rem}.exp-section{margin-top:14px}.exp-kicker{font-weight:800;color:#334155;font-size:.9rem;text-transform:uppercase;letter-spacing:.02em;margin-bottom:6px}.exp-box{position:relative;background:#fff;border:1px solid var(--card-border);border-radius:10px;padding:12px 12px 12px 16px;color:var(--color-text-primary)}.exp-box:before{content:"";position:absolute;inset:0 auto 0 0;width:6px;border-top-left-radius:10px;border-bottom-left-radius:10px;background:var(--stripe, #e5e7eb)}.exp-box--question{--stripe: #94a3b8}.exp-box--your{--stripe: #6366f1}.exp-box--correct{--stripe: #22c55e}.exp-box--explain{--stripe: #06b6d4}.exp-box .katex{font-size:1.05rem}.answer-footer{position:sticky;bottom:0;z-index:20;display:flex;align-items:center;justify-content:flex-end;gap:12px;padding:12px 16px;border-top:1px solid rgba(0,0,0,.08);background:#ffffffd9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.btn{padding:10px 18px;border-radius:8px;font-weight:700;border:1px solid transparent;cursor:pointer}.btn--lg{padding:12px 24px;font-size:1.05rem}.answer-footer .btn-primary,.cta-row .btn{background:var(--color-primary)!important;color:#fff!important;border-color:var(--color-primary-hover)!important}.answer-footer .btn-primary:hover,.cta-row .btn:hover{background:var(--color-primary-hover)!important}.btn-check{background:#10b981!important;color:#fff!important;border:none!important}.btn-check:hover{background:#059669!important}.btn[disabled],.btn[aria-disabled=true]{background:#e5e7eb!important;color:#9ca3af!important;border-color:#e5e7eb!important;cursor:not-allowed}@media (max-width: 980px){.practice-grid{grid-template-columns:1fr;margin-left:16px;margin-right:0;padding:0 16px}.practice-aside{display:none}}@media (max-width: 700px){.exp-box .exp-question{grid-template-columns:1fr}}@media (prefers-color-scheme: dark){.practice-root{background:#fff;color:var(--color-text-primary)}}.practice-root .exercise-panel.card{background:transparent;border:none}.practice-root .accent--question,.practice-root .accent--explain{background:#fff!important}.z-search{--indigo:#4f46e5;--indigo-700:#4338ca;--muted:#6b7280;--border:#e5e7eb;--chip:#f3f4f6;--bg:#fafafa}.z-muted{color:var(--muted)}.z-gap{flex:1 1 auto}.z-keybar{display:flex;gap:.75rem;align-items:center;padding:0 0 1rem;border-bottom:1px solid var(--border)}.z-keybar__input{flex:1;height:44px;padding:0 14px;border:1px solid var(--border);border-radius:12px;background:#fff}.z-filters{padding:1rem 0 0}.z-section-title{font-size:1.25rem;font-weight:800;margin:0 0 .75rem;border-left:4px solid var(--indigo);padding-left:.5rem}.z-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.z-col-2{grid-column:span 2}.z-field{position:relative}.z-field label{display:block;font-size:.9rem;font-weight:600;margin:0 0 .35rem}.z-field input,.z-field select{width:100%;height:42px;border:1px solid var(--border);border-radius:12px;padding:0 12px;background:#fff}.z-row{display:flex;gap:1rem;align-items:center;margin-top:.5rem}.z-toggle{display:flex;gap:.5rem;align-items:center;font-size:.95rem}.z-range{display:flex;align-items:center;gap:.5rem}.z-range input{width:180px;accent-color:var(--indigo)}.z-range__val{font-variant-numeric:tabular-nums}.z-select{position:relative}.z-select__btn{width:100%;height:42px;border:1px solid var(--border);border-radius:12px;padding:0 12px;background:#fff;text-align:left;display:flex;justify-content:space-between;align-items:center}.z-select__btn .z-muted{color:#9ca3af}.z-caret{width:0;height:0;border-left:6px solid transparent;border-right:6px solid transparent;border-top:6px solid #9ca3af}.z-select__panel{position:absolute;z-index:30;margin-top:.25rem;background:#fff;border:1px solid var(--border);border-radius:12px;width:min(36rem,96vw);max-height:18rem;overflow:auto;padding:.25rem;box-shadow:0 10px 30px #00000014}.z-topic-node{width:100%;text-align:left;border-radius:10px;padding:.4rem .5rem}.z-topic-node:hover{background:#f8fafc}.z-topic-children{margin-left:.75rem;padding-left:.5rem;border-left:1px dashed var(--border)}.z-topic-dot{width:6px;height:6px;border-radius:999px;background:#64748b;display:inline-block;margin-right:.35rem}.z-muted{color:#6b7280}.z-chips{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.75rem}.z-chip{display:inline-flex;align-items:center;gap:.35rem;border:1px solid var(--border);background:#fff;border-radius:999px;padding:.25rem .6rem;box-shadow:0 1px #fff inset}.z-chip__x{width:18px;height:18px;border-radius:999px;background:#f3f4f6;border:1px solid var(--border);position:relative}.z-chip__x:before,.z-chip__x:after{content:"";position:absolute;top:50%;left:50%;width:9px;height:1px;background:#6b7280;transform-origin:center}.z-chip__x:before{transform:translate(-50%,-50%) rotate(45deg)}.z-chip__x:after{transform:translate(-50%,-50%) rotate(-45deg)}.z-tagbox{display:flex;flex-wrap:wrap;gap:.35rem;border:1px solid var(--border);border-radius:12px;background:#fff;padding:.35rem}.z-tagbox__input{flex:1;min-width:8rem;border:0;outline:none;padding:.35rem}.z-suggest-row{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:.35rem}.z-suggest{border:1px solid var(--border);border-radius:999px;padding:.25rem .6rem;background:#fff}.z-input{height:38px;border:1px solid var(--border);border-radius:10px;padding:0 .6rem}.z-pop{position:absolute;z-index:40;top:100%;left:0;right:0;margin-top:.25rem;background:#fff;border:1px solid var(--border);border-radius:12px;max-height:16rem;overflow:auto;box-shadow:0 10px 30px #00000014}.z-pop__row{display:block;width:100%;text-align:left;padding:.5rem .75rem}.z-pop__row:hover{background:#f8fafc}.z-actions{display:flex;align-items:center;gap:.5rem;margin-top:1rem}.z-viewtabs{display:flex;gap:.25rem}.z-tab{border:1px solid var(--border);border-radius:10px;padding:.35rem .75rem;background:#fff}.z-tab.is-active{background:#fff;box-shadow:0 4px 16px #0000000d;border-color:#d1d5db}.z-btn{border:1px solid var(--border);background:#fff;border-radius:12px;padding:.55rem .9rem}.z-btn--primary{background:var(--indigo);color:#fff;border-color:var(--indigo)}.z-btn--danger{background:#ef4444;color:#fff;border-color:#ef4444}.z-btn--ghost{background:#f8fafc}.z-results{margin-top:1.25rem}.z-results__head{display:flex;align-items:center;justify-content:space-between}.z-note{margin-top:1rem;color:#374151}.z-note--error{color:#b91c1c}.z-cardgrid{display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:12px}@media (min-width:640px){.z-cardgrid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:1024px){.z-cardgrid{grid-template-columns:repeat(3,minmax(0,1fr))}}.z-card{position:relative;border:1px solid var(--border);border-radius:16px;background:#fff;padding:12px 12px 10px;box-shadow:0 4px 16px #0000000a}.z-card.is-selected{outline:3px solid rgba(79,70,229,.25)}.z-card__stripe{position:absolute;inset:auto auto 0 0;height:4px;width:100%;background:linear-gradient(90deg,var(--indigo),#8b5cf6);border-bottom-left-radius:16px;border-bottom-right-radius:16px}.z-card__head{display:flex;justify-content:space-between;align-items:center}.z-card__badge{font-size:.75rem;background:#eef2ff;color:#3730a3;padding:.15rem .5rem;border-radius:999px}.z-card__star{width:28px;height:28px;border-radius:999px;border:1px solid var(--border);background:#fff;position:relative}.z-card__star:before{content:"☆";position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;color:#9ca3af;font-size:16px}.z-card__star.is-on:before{content:"★";color:#f59e0b}.z-card__title{margin:.25rem 0 0;font-weight:800;font-size:1rem}.z-card__meta{color:#6b7280;font-size:.85rem;margin:.15rem 0 .35rem}.z-card__snippet{color:#374151;font-size:.9rem;height:3.4rem;overflow:hidden}.z-card__tags{margin-top:.35rem;display:flex;flex-wrap:wrap;gap:.25rem}.z-tag{display:inline-block;background:#f3f4f6;border:1px solid var(--border);border-radius:999px;padding:.1rem .5rem;font-size:.75rem;color:#374151}.z-card__actions{display:flex;gap:.5rem;margin-top:.6rem}.z-toolbar{display:flex;align-items:center;gap:.5rem;margin-top:10px;padding:8px 10px;border:1px dashed var(--border);border-radius:12px;background:#fafafa}.z-tablewrap{overflow:auto;margin-top:.75rem}.z-table{width:100%;border-collapse:collapse}.z-table th,.z-table td{border-top:1px solid var(--border);padding:.5rem .6rem;text-align:left;vertical-align:top}.z-table thead th{background:#f8fafc}.z-pager{display:flex;justify-content:flex-end;align-items:center;gap:.5rem;margin-top:12px}.z-input.mt-2{margin-top:.5rem}.z-select .z-muted{color:#9ca3af}.z-card{background:#fff!important;border:none!important;box-shadow:none!important}.z-modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:100;display:flex;align-items:center;justify-content:center;padding:1rem}.z-modal-content{background:#fff;padding:2rem;border-radius:16px;max-width:800px;width:100%;max-height:90vh;overflow-y:auto;position:relative}.z-modal-close{position:absolute;top:.5rem;right:.5rem;font-size:2rem;line-height:1;background:none;border:none;cursor:pointer;color:#9ca3af}.z-select{position:relative;width:100%}.z-select__btn{width:100%;background-color:#fff;border:1px solid #ccc;border-radius:6px;padding:.5rem .75rem;text-align:left;display:flex;justify-content:space-between;align-items:center;cursor:pointer}.z-select__btn:disabled{background-color:#f1f5f9;cursor:not-allowed}.z-caret{border:solid #555;border-width:0 2px 2px 0;display:inline-block;padding:3px;transform:rotate(45deg);-webkit-transform:rotate(45deg)}.z-select__panel{position:absolute;top:100%;left:0;right:0;background-color:#fff;border:1px solid #ccc;border-radius:6px;margin-top:4px;padding:.5rem;max-height:300px;overflow-y:auto;z-index:10;box-shadow:0 4px 6px #0000001a}.z-topic-node{display:block;width:100%;text-align:left;padding:.5rem .75rem;border-radius:4px;background:none;border:none;cursor:pointer}.z-topic-node:hover{background-color:#f1f5f9}.z-topic-children{padding-left:1.25rem;border-left:2px solid #e2e8f0;margin-left:.5rem}.z-topic-dot{display:inline-block;width:6px;height:6px;background-color:#94a3b8;border-radius:50%;margin-right:.5rem;vertical-align:middle}.z-muted{color:#64748b}
