@font-face{font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(fonts/KaTeX_AMS-Regular.woff2) format("woff2"),url(fonts/KaTeX_AMS-Regular.woff) format("woff"),url(fonts/KaTeX_AMS-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(fonts/KaTeX_Caligraphic-Bold.woff2) format("woff2"),url(fonts/KaTeX_Caligraphic-Bold.woff) format("woff"),url(fonts/KaTeX_Caligraphic-Bold.ttf) format("truetype")}@font-face{font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Caligraphic-Regular.woff2) format("woff2"),url(fonts/KaTeX_Caligraphic-Regular.woff) format("woff"),url(fonts/KaTeX_Caligraphic-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(fonts/KaTeX_Fraktur-Bold.woff2) format("woff2"),url(fonts/KaTeX_Fraktur-Bold.woff) format("woff"),url(fonts/KaTeX_Fraktur-Bold.ttf) format("truetype")}@font-face{font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Fraktur-Regular.woff2) format("woff2"),url(fonts/KaTeX_Fraktur-Regular.woff) format("woff"),url(fonts/KaTeX_Fraktur-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(fonts/KaTeX_Main-Bold.woff2) format("woff2"),url(fonts/KaTeX_Main-Bold.woff) format("woff"),url(fonts/KaTeX_Main-Bold.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(fonts/KaTeX_Main-BoldItalic.woff2) format("woff2"),url(fonts/KaTeX_Main-BoldItalic.woff) format("woff"),url(fonts/KaTeX_Main-BoldItalic.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(fonts/KaTeX_Main-Italic.woff2) format("woff2"),url(fonts/KaTeX_Main-Italic.woff) format("woff"),url(fonts/KaTeX_Main-Italic.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Main-Regular.woff2) format("woff2"),url(fonts/KaTeX_Main-Regular.woff) format("woff"),url(fonts/KaTeX_Main-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(fonts/KaTeX_Math-BoldItalic.woff2) format("woff2"),url(fonts/KaTeX_Math-BoldItalic.woff) format("woff"),url(fonts/KaTeX_Math-BoldItalic.ttf) format("truetype")}@font-face{font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(fonts/KaTeX_Math-Italic.woff2) format("woff2"),url(fonts/KaTeX_Math-Italic.woff) format("woff"),url(fonts/KaTeX_Math-Italic.ttf) format("truetype")}@font-face{font-family:"KaTeX_SansSerif";font-style:normal;font-weight:700;src:url(fonts/KaTeX_SansSerif-Bold.woff2) format("woff2"),url(fonts/KaTeX_SansSerif-Bold.woff) format("woff"),url(fonts/KaTeX_SansSerif-Bold.ttf) format("truetype")}@font-face{font-family:"KaTeX_SansSerif";font-style:italic;font-weight:400;src:url(fonts/KaTeX_SansSerif-Italic.woff2) format("woff2"),url(fonts/KaTeX_SansSerif-Italic.woff) format("woff"),url(fonts/KaTeX_SansSerif-Italic.ttf) format("truetype")}@font-face{font-family:"KaTeX_SansSerif";font-style:normal;font-weight:400;src:url(fonts/KaTeX_SansSerif-Regular.woff2) format("woff2"),url(fonts/KaTeX_SansSerif-Regular.woff) format("woff"),url(fonts/KaTeX_SansSerif-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Script-Regular.woff2) format("woff2"),url(fonts/KaTeX_Script-Regular.woff) format("woff"),url(fonts/KaTeX_Script-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Size1-Regular.woff2) format("woff2"),url(fonts/KaTeX_Size1-Regular.woff) format("woff"),url(fonts/KaTeX_Size1-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Size2-Regular.woff2) format("woff2"),url(fonts/KaTeX_Size2-Regular.woff) format("woff"),url(fonts/KaTeX_Size2-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Size3-Regular.woff2) format("woff2"),url(fonts/KaTeX_Size3-Regular.woff) format("woff"),url(fonts/KaTeX_Size3-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Size4-Regular.woff2) format("woff2"),url(fonts/KaTeX_Size4-Regular.woff) format("woff"),url(fonts/KaTeX_Size4-Regular.ttf) format("truetype")}@font-face{font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Typewriter-Regular.woff2) format("woff2"),url(fonts/KaTeX_Typewriter-Regular.woff) format("woff"),url(fonts/KaTeX_Typewriter-Regular.ttf) format("truetype")}.katex{font:normal 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}

:root{--header-green:#163c2b;--yellow:#f7cc3e;--gold:#866000;--paper:#fbf7ec;--surface:#fffdf6;--text:#214b36;--muted:#5b6955;--border:#ddd8c4;--soft:#f2eddb;--tint:#fff0b8;--accent:#28563f;--action:#28563f;--danger:#a13328;--shadow:0 10px 32px #66532909;--heading-bg:linear-gradient(115deg,#faf2d9 0%,#fffaf0 60%,#f5eed9 100%);--hero-bg:linear-gradient(130deg,#f7efd5 0%,#fffaf0 60%,#f2ead2 100%);--board-bg:#fffcf1;--sample-paper:#fffdf6;--sample-ink:#214b36;--sample-grid:#e5deca;--sample-muted:#5b6955;--radius:18px;color-scheme:light;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:15px;line-height:1.6}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--text)}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:4px}button{border:0}button:active{transform:translateY(1px)}[hidden]{display:none!important}.skip-link{position:fixed;top:-100px;background:var(--yellow);color:var(--text);padding:12px;z-index:100}.skip-link:focus{top:8px}.header{background:var(--header-green);color:#efe7ca;border-bottom:1px solid #ffffff15}.header-inner{max-width:1440px;margin:auto;padding:0 36px;min-height:80px;display:flex;align-items:center;gap:26px}.brand{flex-shrink:0;display:flex;align-items:center}.brand img{width:196px;height:70px;object-fit:cover}nav{display:flex;gap:24px;margin-left:auto;align-items:center;font-size:13px;font-weight:600}nav a{padding:28px 0;position:relative;white-space:nowrap;color:#d9e2d7}nav a:hover,nav a[aria-current=page]{color:var(--yellow)}nav a[aria-current=page]:after{content:'';position:absolute;bottom:14px;left:0;right:0;height:2px;background:var(--yellow);border-radius:2px}.count:empty{display:none}.count{font-size:10px;background:#ffffff20;border-radius:50px;padding:2px 5px}.menu-toggle{background:#ffffff0d;color:#efe7ca;width:36px;height:36px;border:1px solid #ffffff30;border-radius:50%;font-size:18px;flex-shrink:0}.menu-toggle{display:none}.preview-line{display:flex;justify-content:center;align-items:center;gap:9px;font-size:11px;letter-spacing:.02em;background:var(--soft);color:var(--muted);border-bottom:1px solid var(--border);padding:8px 16px}.preview-line strong{color:var(--text);font-weight:600}.dot{display:inline-block;width:6px;height:6px;background:var(--gold);border-radius:50%}main{max-width:1320px;margin:auto;min-height:75vh;padding:38px 36px 64px}h1,h2,h3,p{margin-top:0}h1{font-family:Georgia,"Times New Roman",serif;font-size:40px;line-height:1.15;font-weight:500;letter-spacing:-1px;margin-bottom:13px}h2{font-size:23px;line-height:1.3;letter-spacing:-.4px}h3{font-size:16px;margin-bottom:8px}p{margin-bottom:14px}.eyebrow{font-size:11px;letter-spacing:.13em;text-transform:uppercase;font-weight:700;color:var(--accent);margin-bottom:10px}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:28px}.page-heading p{color:var(--muted);margin-bottom:0;max-width:650px;font-size:14px}.badge{display:inline-flex;align-items:center;gap:6px;font-size:11px;line-height:1.4;font-weight:700;padding:6px 10px;border-radius:30px;background:var(--tint);color:var(--text);white-space:nowrap}.badge.soft{background:var(--soft);color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;padding:10px 17px;border-radius:9px;font-size:13px;font-weight:650;background:var(--surface);color:var(--text);border:1px solid var(--border)}.btn:hover{border-color:var(--accent);background:var(--soft)}.btn.primary{background:var(--yellow);border-color:var(--yellow);color:var(--text);box-shadow:0 5px 14px #a57a1720}.btn.primary:hover{filter:brightness(.97)}.btn.solid{background:var(--action);color:#fff;border-color:var(--action)}.btn.quiet{background:transparent}.btn.danger{color:var(--danger)}.btn.small{min-height:36px;padding:6px 11px;font-size:12px}.actions{display:flex;gap:9px;align-items:center;flex-wrap:wrap}.text-link{color:var(--accent);background:transparent;padding:0;font-size:13px;font-weight:650;text-decoration:underline;text-underline-offset:3px}.tutor-layout{display:grid;grid-template-columns:242px minmax(0,1fr);gap:24px;align-items:start}.mode-sidebar{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:19px 12px;box-shadow:var(--shadow)}.sidebar-label{font-size:10px;letter-spacing:.12em;color:var(--muted);font-weight:700;margin:0 12px 13px}.mode-list{display:flex;flex-direction:column;gap:4px}.mode-button{background:none;color:var(--text);display:flex;align-items:center;gap:11px;padding:11px;border-radius:10px;text-align:left;min-height:50px;width:100%;font-size:12px;font-weight:600}.mode-button:hover{background:var(--soft)}.mode-button[aria-pressed=true]{background:var(--action);color:#fff;box-shadow:0 4px 12px #28563f18}.mode-icon{width:29px;height:29px;background:var(--soft);border:1px solid var(--border);display:grid;place-items:center;border-radius:8px;font-family:Georgia,serif;font-size:19px;flex-shrink:0}.mode-button[aria-pressed=true] .mode-icon{background:#ffffff12;color:var(--yellow);border-color:#ffffff22}.mode-number{margin-left:auto;font-size:9px;opacity:.45}.sidebar-note{border-top:1px solid var(--border);margin:18px 10px 0;padding-top:16px;color:var(--muted);font-size:11px;line-height:1.7}.sidebar-note strong{display:block;color:var(--text);margin-bottom:3px}.workspace{min-width:0}.stepper{display:flex;gap:21px;padding:0 0 19px;margin:0;list-style:none;font-size:11px;color:var(--muted);flex-wrap:wrap}.stepper li{display:flex;align-items:center;gap:7px}.stepper span{width:22px;height:22px;display:grid;place-items:center;border:1px solid var(--border);border-radius:50%;font-size:10px}.stepper li.active{color:var(--text);font-weight:650}.stepper li.active span{background:var(--action);color:#fff;border-color:var(--action)}.card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);padding:26px}.composer-title{display:flex;gap:12px;align-items:center;margin-bottom:8px}.composer-title h2{margin:0;font-size:22px}.composer-title .mode-icon{width:39px;height:39px;font-size:24px}.help{color:var(--muted);font-size:13px;margin-bottom:22px;max-width:660px}.settings-grid{display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:13px;margin-bottom:22px}label,.field-label{display:block;font-size:11px;font-weight:650;margin-bottom:7px;color:var(--text)}select,input[type=text],input[type=number],input[type=search],textarea{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:10px 12px;width:100%;color:var(--text);font-size:13px;min-height:43px}textarea{resize:vertical;min-height:126px;line-height:1.7;padding:16px;background:var(--paper)}textarea::placeholder,input::placeholder{color:var(--muted);opacity:.8}.input-label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:7px}.input-label label{margin:0}.input-label span{color:var(--muted);font-size:10px}.example-strip{margin:12px 0 19px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.example-chip{padding:5px 10px;font-size:11px;background:var(--soft);color:var(--text);border:1px solid var(--border);border-radius:30px;max-width:100%;text-align:left}.example-chip:hover{border-color:var(--accent)}.demo-note{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--border);background:var(--soft);padding:12px 14px;border-radius:9px;font-size:11px;color:var(--muted);margin-bottom:19px}.demo-note strong{color:var(--text)}.composer-footer{display:flex;justify-content:space-between;align-items:center;gap:15px}.composer-footer small{font-size:10px;color:var(--muted)}.notice{border-left:3px solid var(--gold);padding:12px 16px;background:var(--tint);border-radius:0 9px 9px 0;margin:16px 0;font-size:13px}.notice.error{border-color:var(--danger)}.result-card{margin-top:22px;padding:0;overflow:hidden}.result-header{padding:21px 26px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:start;gap:12px;background:var(--soft)}.result-header h2{font-size:20px;margin:8px 0 0}.result-body{padding:26px}.result-body p{font-size:14px}.problem-display{padding:18px 20px;border:1px solid var(--border);border-radius:10px;background:var(--paper);margin:16px 0 25px}.math{display:block;max-width:100%;overflow-x:auto;overflow-y:hidden;padding:9px 3px;line-height:1.9}.katex-display{margin:.25em 0!important}.katex{font-size:1.18em!important}.solution-step{display:grid;grid-template-columns:30px minmax(0,1fr);gap:13px;margin-bottom:22px}.step-num{width:27px;height:27px;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:var(--accent);font-size:11px;font-weight:700}.solution-step h3{font-size:14px;margin:1px 0 6px}.solution-step p{font-size:13px;color:var(--muted);margin-bottom:3px}.answer-box{padding:17px 19px;background:var(--soft);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:9px;margin:20px 0}.answer-box strong{display:block;font-size:16px}.answer-box .eyebrow{font-size:9px;margin-bottom:7px}.takeaway{border-top:1px solid var(--border);padding-top:18px;margin-top:22px;color:var(--muted);font-size:13px}.takeaway strong{color:var(--text)}.result-actions{border-top:1px solid var(--border);padding:18px 26px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;background:var(--paper)}.result-actions .text-link{margin-left:auto}.content-list{padding-left:20px;font-size:14px}.content-list li{margin-bottom:7px}.hint{padding:17px;border:1px solid var(--border);border-radius:10px;margin-bottom:13px;background:var(--paper)}.hint .eyebrow{font-size:10px;margin-bottom:7px}.hint p{margin:0}.reflection{margin-top:20px}.reflection textarea{min-height:80px}.photo-area{border:1.5px dashed var(--border);background:var(--paper);border-radius:12px;padding:20px;text-align:center;margin-bottom:16px}.photo-area p{font-size:12px;color:var(--muted);margin:10px 0}.photo-area svg{max-width:100%;height:auto;background:var(--sample-paper);border-radius:9px}.photo-preview{max-width:100%;max-height:250px;border-radius:8px;object-fit:contain}.check-label{display:flex;align-items:center;gap:10px;font-size:12px;margin:12px 0}.check-label input{accent-color:var(--accent);width:18px;height:18px}.sub-controls{display:flex;gap:16px;margin:12px 0 18px}.sub-controls>div{max-width:220px;flex:1}.quiz-question{margin:0 0 22px;padding:0;border:0;min-width:0}.quiz-question legend{font-weight:650;margin-bottom:12px;font-size:14px}.option-label{display:flex;gap:10px;align-items:center;font-size:13px;font-weight:400;padding:12px;border:1px solid var(--border);border-radius:9px;margin-bottom:8px;cursor:pointer}.option-label:has(input:checked){background:var(--soft);border-color:var(--accent)}input[type=radio]{accent-color:var(--accent);width:17px;height:17px}.timer{font-variant-numeric:tabular-nums;white-space:nowrap;font-size:13px;font-weight:700;border:1px solid var(--border);padding:8px 12px;border-radius:8px}.score{font-size:42px;font-family:Georgia,serif;line-height:1.2}.feedback-item{padding:14px 16px;border-left:3px solid var(--accent);background:var(--soft);margin:12px 0;border-radius:6px}.feedback-item.incorrect{border-color:var(--danger)}.feedback-item p{font-size:12px;margin:5px 0}.exercise{border:1px solid var(--border);padding:17px;border-radius:10px;margin-bottom:14px}.exercise label{font-size:13px;line-height:1.7}.exercise input{max-width:240px}.practice-solution{font-size:12px;color:var(--muted);padding-top:10px}.hero{background:var(--hero-bg);color:var(--text);border:1px solid var(--border);border-radius:22px;display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:58px 46px;margin-bottom:30px;overflow:hidden}.hero h1{font-size:58px;line-height:1.05;letter-spacing:-1.5px}.hero h1 em{color:var(--gold);font-style:normal}.hero p{color:var(--muted);max-width:430px}.hero .eyebrow{color:var(--gold)}.hero .badge{background:var(--tint);color:var(--gold)}.hero .tagline{font-family:Georgia,serif;font-size:22px;font-style:italic;color:var(--text)}.hero .btn.quiet{color:var(--text);border-color:var(--accent)}.chalkboard{background:var(--board-bg);border:1px solid var(--border);border-radius:16px;padding:26px;transform:rotate(-1deg);align-self:center;color:var(--text)}.chalkboard .math{font-size:20px;color:var(--text);margin:14px 0}.chalkboard .eyebrow{font-size:10px;color:var(--gold)}.chalkboard p{font-size:13px}.chalkboard .board-step{border-left:2px solid var(--yellow);padding-left:15px;margin:18px 0}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.library-card{display:flex;flex-direction:column;align-items:start;gap:10px}.library-card h3{font-size:18px}.library-card p{font-size:13px;color:var(--muted);flex:1}.library-card .badge{font-size:10px}.empty{padding:46px 22px;text-align:center;border:1px dashed var(--border);border-radius:16px;color:var(--muted);background:var(--surface)}.empty .empty-icon{font-family:Georgia,serif;font-size:42px;color:var(--accent);margin-bottom:12px}.empty h2{color:var(--text)}.empty p{font-size:13px;max-width:430px;margin:0 auto 20px}.notebook-tools{display:flex;gap:14px;align-items:end;margin:20px 0;flex-wrap:wrap}.notebook-tools>div{flex:1;min-width:180px}.session-list{display:flex;flex-direction:column;gap:13px}.session-card{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:20px;padding:21px}.session-card h3{font-size:16px;margin:6px 0}.session-card p{font-size:12px;color:var(--muted);margin:0;overflow-wrap:anywhere}.session-card .actions{justify-content:end}.local-warning{font-size:12px;color:var(--muted);margin:8px 0 20px}.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:24px}.metric strong{font-family:Georgia,serif;font-size:34px;font-weight:500;display:block}.metric span{font-size:12px;color:var(--muted)}.progress-row{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--border);font-size:13px}.settings-section{max-width:760px}.settings-section .card{margin-bottom:22px}.settings-section p{color:var(--muted);font-size:13px}.settings-section select{max-width:300px}.section-heading{margin:32px 0 16px}footer{max-width:1320px;padding:28px 36px;margin:auto;border-top:1px solid var(--border);display:flex;gap:20px;justify-content:space-between;color:var(--muted);font-size:10px;flex-wrap:wrap}.footer-brand{font-family:Georgia,serif;color:var(--text);font-size:19px}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);max-width:calc(100% - 32px);background:var(--action);color:#fff;border:1px solid #ffffff40;box-shadow:0 10px 30px #0003;border-radius:10px;padding:14px 20px;font-size:13px;z-index:50}.modal-backdrop{position:fixed;inset:0;z-index:60;background:#1b2c21a8;display:grid;place-items:center;padding:18px;backdrop-filter:blur(4px)}.modal{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:26px;max-width:700px;width:100%;max-height:88vh;overflow:auto;box-shadow:0 22px 80px #0005}.modal.wide{max-width:900px}.modal-header{display:flex;justify-content:space-between;align-items:start;gap:16px}.modal-header h2{font-family:Georgia,serif;font-size:27px}.modal .close{flex-shrink:0;background:var(--soft);color:var(--text);border-radius:50%;width:32px;height:32px;font-size:20px}.modal pre{font:13px/1.8 ui-sans-serif,sans-serif;white-space:pre-wrap;overflow-wrap:anywhere;background:var(--paper);padding:17px;border:1px solid var(--border);border-radius:8px}.catalog-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.catalog-choice{padding:16px;border:1px solid var(--border);background:var(--paper);color:var(--text);border-radius:10px;text-align:left}.catalog-choice strong{display:block;font-size:13px}.catalog-choice small{display:block;color:var(--muted);font-size:11px;margin-top:6px}.catalog-choice:hover{border-color:var(--accent)}.inline-note{font-size:11px;color:var(--muted);margin:8px 0}.danger-text{color:var(--danger)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:1200px){.mode-sidebar{position:sticky;top:20px}}@media(max-width:1100px){.header-inner{padding:0 24px;gap:18px}nav{gap:15px;font-size:12px}.brand img{width:170px}.tutor-layout{grid-template-columns:205px minmax(0,1fr);gap:18px}.mode-button{font-size:11px;padding:9px}.hero{padding:40px 30px}.hero h1{font-size:48px}}
@media(max-width:900px){.menu-toggle{display:block;margin-left:auto}.header-inner{position:relative;min-height:74px}.header nav{display:none;position:absolute;top:74px;left:0;right:0;background:var(--header-green);padding:18px 24px;z-index:20;box-shadow:0 20px 30px #0002;border-bottom:1px solid #ffffff30}.header nav.open{display:grid;grid-template-columns:repeat(2,1fr)}nav a{padding:10px 0}nav a[aria-current=page]:after{bottom:3px;width:28px}.tutor-layout{grid-template-columns:1fr}.mode-sidebar{padding:13px}.mode-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px}.mode-button{flex-direction:column;gap:6px;text-align:center;justify-content:center;padding:9px 4px;font-size:10px}.mode-number,.sidebar-note,.sidebar-label{display:none}.mode-icon{width:28px;height:28px}.hero{grid-template-columns:1fr 1fr;gap:24px}.hero h1{font-size:42px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){main{padding:26px 16px 42px}.header-inner{padding:0 16px;gap:12px}.brand img{width:170px;height:68px}h1{font-size:32px}.page-heading{align-items:start;margin-bottom:22px;flex-wrap:wrap;gap:12px}.page-heading p{font-size:12px}.page-heading>.badge{display:none}.preview-line{font-size:9px;padding:7px 10px}.settings-grid{gap:10px;grid-template-columns:1fr 1fr}.settings-grid>div:nth-child(2){grid-column:1/-1;grid-row:2}.settings-grid>div:nth-child(3){grid-column:2;grid-row:1}.card{padding:19px}.composer-title h2{font-size:20px}.help{font-size:12px}.stepper{gap:11px;font-size:9px;justify-content:space-between}.stepper li{gap:4px}.stepper span{width:19px;height:19px;font-size:9px}.composer-footer{flex-direction:column;align-items:stretch;gap:9px}.composer-footer .btn{width:100%}.composer-footer small{text-align:center}.result-card{padding:0}.result-header,.result-body{padding:19px}.result-header h2{font-size:19px}.result-header{flex-wrap:wrap}.result-actions{padding:16px;gap:9px}.result-actions>.btn{flex:1}.result-actions .text-link{margin:4px auto}.solution-step{grid-template-columns:25px minmax(0,1fr);gap:10px}.math{font-size:.94em}.hero{grid-template-columns:1fr;padding:30px 24px;gap:28px}.hero h1{font-size:46px}.hero .tagline{font-size:20px}.hero p{font-size:13px}.chalkboard{padding:20px;transform:none}.hero .actions{align-items:stretch;flex-direction:column}.grid,.grid.two{grid-template-columns:1fr}.metrics{gap:9px}.metric{padding:14px 11px}.metric strong{font-size:27px}.metric span{font-size:10px}.session-card{grid-template-columns:1fr;gap:13px}.session-card .actions{justify-content:start}.catalog-list{grid-template-columns:1fr}.modal{padding:20px}.modal-header h2{font-size:23px}footer{padding:24px 16px;gap:10px;flex-direction:column}.photo-area{padding:14px}.photo-area .actions{justify-content:center}.input-label{align-items:start}.input-label span{font-size:9px}.result-body p{font-size:13px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.mobile-nav,.mobile-mode-trigger{display:none}
@media(max-width:600px){body{padding-bottom:calc(76px + env(safe-area-inset-bottom))}.header{position:sticky;top:0;z-index:25}.header-inner{min-height:64px}.brand img{height:60px;width:160px}.header nav{top:64px}.preview-line{justify-content:start;padding-left:17px}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;margin:0;justify-content:space-around;gap:0;padding:8px 8px calc(8px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--border);z-index:40;box-shadow:0 -4px 20px #6653290a}.mobile-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-width:64px;min-height:48px;font-size:10px;padding:3px 11px;color:var(--muted);border-radius:12px}.mobile-nav a>span{font-family:Georgia,serif;font-size:22px;line-height:1.1}.mobile-nav a[aria-current=page]{background:var(--tint);color:var(--accent)}.mobile-nav a[aria-current=page]:after{display:none}.keyboard-open .mobile-nav{display:none}.mode-sidebar{padding:0;background:none;box-shadow:none;border:0}.mode-sidebar .mode-list{display:none}.mobile-mode-trigger{display:flex;width:100%;align-items:center;gap:13px;text-align:left;border:1px solid var(--border);background:var(--surface);padding:12px 15px;border-radius:12px;color:var(--text)}.mobile-mode-trigger small{display:block;font-size:9px;letter-spacing:.09em;color:var(--muted)}.mobile-mode-trigger strong{font-size:13px}.mobile-mode-trigger>span:last-child{margin-left:auto}.mode-sidebar .mode-icon{width:37px;height:37px}.tutor-layout{gap:17px}.btn.small,.text-link,.example-chip{min-height:44px}.text-link{display:inline-flex;align-items:center}.menu-toggle{min-width:42px;min-height:42px}input[type=text],input[type=search],select,textarea{font-size:16px}#problem{min-height:140px}.page-heading{margin-bottom:19px}.page-heading h1{font-size:30px}.modal-backdrop{padding:12px;align-items:end}.modal{max-height:88dvh;border-radius:22px 22px 12px 12px;padding-bottom:calc(22px + env(safe-area-inset-bottom))}.modal .close{width:44px;height:44px}.catalog-choice{min-height:72px}.result-actions{flex-direction:column;align-items:stretch}.result-actions>.btn{width:100%}#toast{bottom:calc(88px + env(safe-area-inset-bottom));width:calc(100% - 32px);text-align:center}.keyboard-open #toast{bottom:16px}.settings-grid select{font-size:16px}.stepper{margin-top:0}.photo-area .btn{min-height:44px}.card{border-radius:14px}.hero{border-radius:18px}.hero h1{font-size:47px}}
/* Long formulas scroll within their card without clipping the start of the equation. */
.math>.katex-display{width:max-content;min-width:100%;max-width:none}

/* Cream learning surfaces, forest-green text and readable golden accents. */
body{background:var(--paper)}
.page-heading{padding:27px 30px;border:1px solid var(--border);border-radius:20px;background:var(--heading-bg);position:relative;overflow:hidden}
.page-heading:before{content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--yellow),#e5b82e,#f4df93)}
.page-heading h1{color:var(--text)}
.page-heading .eyebrow{color:var(--gold)}
.page-heading>.badge{background:var(--surface);color:var(--accent);border:1px solid var(--border)}
.mode-button[data-mode=resolver]{--mode-ink:var(--accent);--mode-tint:var(--soft)}
.mode-button[data-mode=foto]{--mode-ink:var(--gold);--mode-tint:var(--tint)}
.mode-button[data-mode=explicar]{--mode-ink:var(--accent);--mode-tint:var(--soft)}
.mode-button[data-mode=corregir]{--mode-ink:var(--gold);--mode-tint:var(--tint)}
.mode-button[data-mode=tutor]{--mode-ink:var(--accent);--mode-tint:var(--soft)}
.mode-button[data-mode=guia]{--mode-ink:var(--gold);--mode-tint:var(--tint)}
.mode-button[data-mode=simulacro]{--mode-ink:var(--accent);--mode-tint:var(--soft)}
.mode-button[data-mode=practica]{--mode-ink:var(--gold);--mode-tint:var(--tint)}
.mode-button .mode-icon{color:var(--mode-ink);background:var(--mode-tint);border-color:transparent}
.mode-button[aria-pressed=true] .mode-icon{color:var(--yellow);background:#ffffff12;border-color:#ffffff22}
.composer-title .mode-icon{color:var(--accent);background:var(--soft)}

.hero .btn.primary{background:var(--yellow);color:var(--text);border-color:var(--yellow)}
@media(max-width:600px){.page-heading{padding:24px 20px;border-radius:16px}.page-heading h1{font-size:29px}.page-heading p{line-height:1.7}.mobile-mode-trigger{border-left:4px solid var(--action)}.mobile-mode-trigger .mode-icon{background:var(--soft);color:var(--accent)}}

/* Mobile refinements: retain the existing palette and contain wide content. */
main,.card,.modal,.settings-grid>div,.notebook-tools>div{min-width:0}
.math{overscroll-behavior-x:contain}
.modal{overflow-wrap:anywhere;overscroll-behavior:contain}
@media(max-width:600px){
  html{scroll-padding-top:80px;scroll-padding-bottom:96px}
  .header-inner{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
  .menu-toggle{width:44px;height:44px}
  .header nav a{min-height:44px;display:flex;align-items:center}
  .mobile-nav{padding-left:max(8px,env(safe-area-inset-left));padding-right:max(8px,env(safe-area-inset-right))}
  .mobile-nav a{flex:1;min-width:0}
  input[type=number]{font-size:16px;min-height:44px}
  select,input[type=text],input[type=search]{min-height:44px}
  .settings-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .stepper{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;font-size:11px}
  .input-label{flex-wrap:wrap}
  .notebook-tools>div{min-width:0;flex-basis:100%}
  .btn,.badge,.demo-note,.notice,.answer-box,.composer-title h2{overflow-wrap:anywhere}
  .badge{white-space:normal}
  .demo-note>span{min-width:0}
  .modal-backdrop{min-width:0}
  #result{scroll-margin-top:80px}
  textarea,input,select{scroll-margin-block:90px}
  .keyboard-open #toast{bottom:calc(12px + env(safe-area-inset-bottom))}
}