@import url(https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Crimson+Pro:wght@400;500;600&display=swap);:root{--primary:210 25% 25%;--primary-light:210 25% 85%;--primary-hover:210 25% 20%;--accent:160 45% 50%;--accent-light:160 40% 92%;--accent-hover:160 45% 42%;--secondary:170 35% 65%;--secondary-light:170 30% 95%;--background:0 0% 98%;--surface:0 0% 100%;--surface-elevated:0 0% 100%;--border:210 15% 90%;--border-light:210 10% 94%;--text:210 20% 15%;--text-secondary:210 10% 45%;--text-muted:210 8% 60%;--text-inverse:0 0% 100%;--success:140 60% 50%;--warning:35 100% 55%;--error:0 70% 55%;--info:200 90% 55%;--shadow-sm:0 1px 2px 0 #1f262e08;--shadow:0 2px 8px 0 #1f262e0a;--shadow-md:0 4px 16px 0 #1f262e0f;--shadow-lg:0 8px 24px 0 #1f262e14;--shadow-xl:0 16px 48px 0 #1f262e1f;--radius-sm:0.375rem;--radius:0.5rem;--radius-md:0.75rem;--radius-lg:1rem;--radius-xl:1.5rem;--radius-full:9999px;--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition:250ms cubic-bezier(0.4,0,0.2,1);--transition-slow:350ms cubic-bezier(0.4,0,0.2,1);--transition-bounce:500ms cubic-bezier(0.34,1.56,0.64,1);--space-xs:0.25rem;--space-sm:0.5rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2rem;--space-2xl:3rem;--space-3xl:4rem}.dark{--background:210 20% 8%;--surface:210 18% 12%;--surface-elevated:210 16% 15%;--border:210 15% 20%;--border-light:210 12% 16%;--text:210 15% 95%;--text-secondary:210 10% 70%;--text-muted:210 8% 50%;--primary-light:210 25% 20%;--accent-light:160 40% 15%;--secondary-light:170 30% 15%;--shadow-sm:0 1px 2px 0 #0003;--shadow:0 2px 8px 0 #0000004d;--shadow-md:0 4px 16px 0 #0006;--shadow-lg:0 8px 24px 0 #00000080;--shadow-xl:0 16px 48px 0 #0009}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px;scroll-behavior:smooth;text-rendering:optimizeLegibility}body{background-color:#fafafa;background-color:hsl(var(--background));color:#1f262e;color:hsl(var(--text));font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-weight:400;line-height:1.6}#root,body{min-height:100vh}#root{display:flex;flex-direction:column}h1,h2,h3,h4,h5,h6{color:#1f262e;color:hsl(var(--text));font-weight:600;letter-spacing:-.02em;line-height:1.25}h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:700}h2{font-size:clamp(1.5rem,3vw,2.5rem);font-weight:600}h3{font-size:clamp(1.25rem,2.5vw,1.75rem)}h4{font-size:1.25rem}h5{font-size:1.125rem}h6{font-size:1rem}p{color:#67737e;color:hsl(var(--text-secondary));line-height:1.7}a{color:#46b993;color:hsl(var(--accent));text-decoration:none;transition:color .15s cubic-bezier(.4,0,.2,1);transition:color var(--transition-fast)}a:hover{color:#3b9b7b;color:hsl(var(--accent-hover))}:focus-visible{outline:2px solid #46b993;outline:2px solid hsl(var(--accent));outline-offset:2px}button{border:none;cursor:pointer;font-family:inherit;outline:none}.btn,button{font-weight:500}.btn{align-items:center;border-radius:.5rem;border-radius:var(--radius);display:inline-flex;font-size:.875rem;gap:.5rem;justify-content:center;padding:.625rem 1.25rem;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast);-webkit-user-select:none;user-select:none;white-space:nowrap}.btn-sm{font-size:.8125rem;padding:.5rem 1rem}.btn-lg{font-size:1rem;padding:.875rem 1.75rem}.btn-primary{background:#46b993;background:hsl(var(--accent));box-shadow:0 1px 2px #46b99333;box-shadow:0 1px 2px hsl(var(--accent)/.2);color:#fff;color:hsl(var(--text-inverse))}.btn-primary:hover{background:#3b9b7b;background:hsl(var(--accent-hover));box-shadow:0 4px 12px #46b9934d;box-shadow:0 4px 12px hsl(var(--accent)/.3);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:#fff;background:hsl(var(--surface));border:1px solid #e2e6e9;border:1px solid hsl(var(--border));box-shadow:0 1px 2px 0 #1f262e08;box-shadow:var(--shadow-sm);color:#1f262e;color:hsl(var(--text))}.btn-secondary:hover{background:#fafafa;background:hsl(var(--background));border-color:#9199a1;border-color:hsl(var(--text-muted));box-shadow:0 2px 8px 0 #1f262e0a;box-shadow:var(--shadow)}.btn-ghost{background:#0000;color:#67737e;color:hsl(var(--text-secondary))}.btn-ghost:hover{background:#eef0f1;background:hsl(var(--border-light));color:#1f262e;color:hsl(var(--text))}input,select,textarea{background:#fff;background:hsl(var(--surface));border:1px solid #e2e6e9;border:1px solid hsl(var(--border));border-radius:.5rem;border-radius:var(--radius);color:#1f262e;color:hsl(var(--text));font-family:inherit;font-size:.9375rem;padding:.75rem 1rem;transition:all .15s cubic-bezier(.4,0,.2,1);transition:all var(--transition-fast);width:100%}input:hover,select:hover,textarea:hover{border-color:#9199a1;border-color:hsl(var(--text-muted))}input:focus,select:focus,textarea:focus{border-color:#46b993;border-color:hsl(var(--accent));box-shadow:0 0 0 3px #46b9931a;box-shadow:0 0 0 3px hsl(var(--accent)/.1);outline:none}input::placeholder{color:#9199a1;color:hsl(var(--text-muted))}.card{background:#fff;background:hsl(var(--surface));border:1px solid #e2e6e9;border:1px solid hsl(var(--border));border-radius:1rem;border-radius:var(--radius-lg);box-shadow:0 1px 2px 0 #1f262e08;box-shadow:var(--shadow-sm);transition:all .25s cubic-bezier(.4,0,.2,1);transition:all var(--transition)}.card:hover{border-color:#eef0f1;border-color:hsl(var(--border-light));box-shadow:0 4px 16px 0 #1f262e0f;box-shadow:var(--shadow-md)}::-webkit-scrollbar{height:10px;width:10px}::-webkit-scrollbar-track{background:#fafafa;background:hsl(var(--background))}::-webkit-scrollbar-thumb{background:#9199a1;background:hsl(var(--text-muted));border:2px solid #fafafa;border:2px solid hsl(var(--background));border-radius:9999px;border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:#67737e;background:hsl(var(--text-secondary))}::selection{background:#46b99333;background:hsl(var(--accent)/.2);color:#1f262e;color:hsl(var(--text))}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes spin{to{transform:rotate(1turn)}}.animate-fade-in{animation:fadeIn ease-out .25s cubic-bezier(.4,0,.2,1);animation:fadeIn var(--transition) ease-out}.animate-slide-up{animation:slideUp ease-out .35s cubic-bezier(.4,0,.2,1);animation:slideUp var(--transition-slow) ease-out}.animate-slide-down{animation:slideDown ease-out .35s cubic-bezier(.4,0,.2,1);animation:slideDown var(--transition-slow) ease-out}.animate-scale-in{animation:scaleIn ease-out .25s cubic-bezier(.4,0,.2,1);animation:scaleIn var(--transition) ease-out}.animate-spin{animation:spin 1s linear infinite}.container{margin:0 auto;max-width:1280px;padding:0 1.5rem;width:100%}.sr-only{clip:rect(0,0,0,0);border:0;height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;white-space:nowrap;width:1px}.question-content{font-family:Crimson Pro,Times New Roman,Times,serif;font-size:1rem;line-height:1.8}.question-content *{background:#0000!important}.question-content img{height:auto;max-width:100%}.question-content img,.question-content table{border-radius:.5rem;border-radius:var(--radius);box-shadow:0 1px 2px 0 #1f262e08;box-shadow:var(--shadow-sm);margin:1.5rem 0}.question-content table{border-collapse:collapse;overflow:hidden;width:100%}.question-content table td,.question-content table th{border:1px solid #e2e6e9;border:1px solid hsl(var(--border));padding:.75rem 1rem;text-align:left}.question-content table th{background:#cfd9e2;background:hsl(var(--primary-light));color:#1f262e;color:hsl(var(--text));font-weight:600}.question-content .marks{color:#46b993;color:hsl(var(--accent));float:right;font-family:Inter,sans-serif;font-size:.875rem;font-weight:600}.question-content .question_part_label{color:#304050;color:hsl(var(--primary));font-family:Inter,sans-serif;font-weight:600}@media print{*{-webkit-print-color-adjust:exact;print-color-adjust:exact}body{background:#fff;color:#000}.no-print{display:none!important}.question-content{page-break-inside:avoid}@page{margin:2cm 1.5cm}}@media (max-width:768px){html{font-size:15px}.container{padding:0 1rem}.btn-lg{font-size:.9375rem;padding:.75rem 1.5rem}}@media (max-width:480px){html{font-size:14px}}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_AMS-Regular.73ea273a72f4aca30ca5.woff2) format("woff2"),url(/static/media/KaTeX_AMS-Regular.d562e886c52f12660a41.woff) format("woff"),url(/static/media/KaTeX_AMS-Regular.853be92419a6c3766b9a.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/static/media/KaTeX_Caligraphic-Bold.a1abf90dfd72792a577a.woff2) format("woff2"),url(/static/media/KaTeX_Caligraphic-Bold.d757c535a2e5902f1325.woff) format("woff"),url(/static/media/KaTeX_Caligraphic-Bold.7489a2fbfb9bfe704420.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Caligraphic-Regular.d6484fce1ef428d5bd94.woff2) format("woff2"),url(/static/media/KaTeX_Caligraphic-Regular.db074fa22cf224af93d7.woff) format("woff"),url(/static/media/KaTeX_Caligraphic-Regular.7e873d3833eb108a0758.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/static/media/KaTeX_Fraktur-Bold.931d67ea207ab37ee693.woff2) format("woff2"),url(/static/media/KaTeX_Fraktur-Bold.354501bac435c3264834.woff) format("woff"),url(/static/media/KaTeX_Fraktur-Bold.4c761b3711973ab04edf.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Fraktur-Regular.172d3529b26f8cedef6b.woff2) format("woff2"),url(/static/media/KaTeX_Fraktur-Regular.6fdf0ac577be0ba82a4c.woff) format("woff"),url(/static/media/KaTeX_Fraktur-Regular.ed305b5434865e06ffde.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/static/media/KaTeX_Main-Bold.39890742bc957b368704.woff2) format("woff2"),url(/static/media/KaTeX_Main-Bold.0c3b8929d377c0e9b2f3.woff) format("woff"),url(/static/media/KaTeX_Main-Bold.8169508bf58f8bd92ad8.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/static/media/KaTeX_Main-BoldItalic.20f389c4120be058d80a.woff2) format("woff2"),url(/static/media/KaTeX_Main-BoldItalic.428978dc7837d46de091.woff) format("woff"),url(/static/media/KaTeX_Main-BoldItalic.828abcb200061cffbaae.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/static/media/KaTeX_Main-Italic.fe2176f79edaa716e621.woff2) format("woff2"),url(/static/media/KaTeX_Main-Italic.fd947498bc16392e76c2.woff) format("woff"),url(/static/media/KaTeX_Main-Italic.fa675e5e4bec9eb250b6.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Main-Regular.f650f111a3b890d116f1.woff2) format("woff2"),url(/static/media/KaTeX_Main-Regular.4f35fbcc9ee8614c2bcc.woff) format("woff"),url(/static/media/KaTeX_Main-Regular.9eba1d77abcf2aa6e94e.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/static/media/KaTeX_Math-BoldItalic.dcbcbd93bac0470b462d.woff2) format("woff2"),url(/static/media/KaTeX_Math-BoldItalic.3f07ed67f06c720120ce.woff) format("woff"),url(/static/media/KaTeX_Math-BoldItalic.bf2d440b3a42ea78a998.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/static/media/KaTeX_Math-Italic.6d3d25f4820d0da8f01f.woff2) format("woff2"),url(/static/media/KaTeX_Math-Italic.96759856b4e70f3a8338.woff) format("woff"),url(/static/media/KaTeX_Math-Italic.8a5f936332e8028c7278.ttf) format("truetype")}@font-face{font-display:block;font-family:"KaTeX_SansSerif";font-style:normal;font-weight:700;src:url(/static/media/KaTeX_SansSerif-Bold.95591a929f0d32aa282a.woff2) format("woff2"),url(/static/media/KaTeX_SansSerif-Bold.b9cd458ac6d5889ff9c3.woff) format("woff"),url(/static/media/KaTeX_SansSerif-Bold.5b49f4993ae22d7975b4.ttf) format("truetype")}@font-face{font-display:block;font-family:"KaTeX_SansSerif";font-style:italic;font-weight:400;src:url(/static/media/KaTeX_SansSerif-Italic.7d393d382f3e7fb1c637.woff2) format("woff2"),url(/static/media/KaTeX_SansSerif-Italic.8d593cfaa96238d5e2f8.woff) format("woff"),url(/static/media/KaTeX_SansSerif-Italic.b257a18c016f37ee4543.ttf) format("truetype")}@font-face{font-display:block;font-family:"KaTeX_SansSerif";font-style:normal;font-weight:400;src:url(/static/media/KaTeX_SansSerif-Regular.cd5e231e0cc53b2cb2c0.woff2) format("woff2"),url(/static/media/KaTeX_SansSerif-Regular.02271ec5cb9f5b4588ac.woff) format("woff"),url(/static/media/KaTeX_SansSerif-Regular.2f7bc363fc5424ebda59.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Script-Regular.c81d1b2a4b75d3eded60.woff2) format("woff2"),url(/static/media/KaTeX_Script-Regular.073b3402d036714b4370.woff) format("woff"),url(/static/media/KaTeX_Script-Regular.fc9ba5249878cd8f8d88.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Size1-Regular.6eec866c69313624be60.woff2) format("woff2"),url(/static/media/KaTeX_Size1-Regular.0108e89c9003e8c14ea3.woff) format("woff"),url(/static/media/KaTeX_Size1-Regular.6de7d4b539221a49e9e2.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Size2-Regular.2960900c4f271311eb36.woff2) format("woff2"),url(/static/media/KaTeX_Size2-Regular.3a99e70aee4076660d38.woff) format("woff"),url(/static/media/KaTeX_Size2-Regular.57f5c1837853986ea1db.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Size3-Regular.e1951519f6f0596f7356.woff2) format("woff2"),url(/static/media/KaTeX_Size3-Regular.7947224e8a9914fa332b.woff) format("woff"),url(/static/media/KaTeX_Size3-Regular.8d6b6822586eea3d3b20.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Size4-Regular.e418bf257af1052628d8.woff2) format("woff2"),url(/static/media/KaTeX_Size4-Regular.aeffd8025cba3647f1a6.woff) format("woff"),url(/static/media/KaTeX_Size4-Regular.4ad7c7e8bb8d10a34bb7.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/static/media/KaTeX_Typewriter-Regular.c295e7f71970f03c0549.woff2) format("woff2"),url(/static/media/KaTeX_Typewriter-Regular.4c6b94fd1d07f8beff7c.woff) format("woff"),url(/static/media/KaTeX_Typewriter-Regular.c5c02d763c89380dcb4e.ttf) format("truetype")}.katex{font:normal 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;position:relative;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.45"}.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: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 .smash{display:inline;line-height:0}.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;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex svg{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}.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}.landing-page{display:flex;flex-direction:column;min-height:100vh}.nav{backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);background:hsl(var(--surface)/.9);border-bottom:1px solid hsl(var(--border));padding:1rem 0;position:sticky;top:0;transition:all var(--transition-fast);z-index:100}.nav-container{gap:2rem;justify-content:space-between;margin:0 auto;max-width:1280px;padding:0 1.5rem}.nav-container,.nav-logo{align-items:center;display:flex}.nav-logo{color:hsl(var(--text));font-size:1.125rem;font-weight:600;gap:.75rem;transition:color var(--transition-fast)}.nav-logo svg,.nav-logo:hover{color:hsl(var(--accent))}.nav-actions{gap:.75rem}.nav-actions,.theme-toggle{align-items:center;display:flex}.theme-toggle{background:#0000;border-radius:var(--radius);color:hsl(var(--text-secondary));justify-content:center;padding:.5rem;transition:all var(--transition-fast)}.theme-toggle:hover{background:hsl(var(--border-light));color:hsl(var(--text))}.nav-login{display:none}.hero{overflow:hidden;padding:6rem 1.5rem 4rem;position:relative}.hero-bg{background:radial-gradient(circle at 20% 50%,hsl(var(--accent-light)) 0,#0000 50%),radial-gradient(circle at 80% 80%,hsl(var(--secondary-light)) 0,#0000 50%),radial-gradient(circle at 40% 20%,hsl(var(--primary-light)) 0,#0000 60%);inset:0;opacity:.4;position:absolute;z-index:-1}.hero-content{animation:slideUp .8s ease-out;margin:0 auto;max-width:900px;text-align:center}.hero-badge{align-items:center;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-full);box-shadow:var(--shadow-sm);color:hsl(var(--text-secondary));display:inline-flex;font-size:.875rem;font-weight:500;gap:.5rem;margin-bottom:1.5rem;padding:.5rem 1rem}.hero-badge svg{color:hsl(var(--accent))}.hero-title{font-size:clamp(2.5rem,6vw,4rem);font-weight:700;letter-spacing:-.03em;line-height:1.15;margin-bottom:1.5rem}.gradient-text{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,hsl(var(--accent)) 0,hsl(var(--secondary)) 100%);-webkit-background-clip:text;background-clip:text}.hero-subtitle{color:hsl(var(--text-secondary));font-size:clamp(1rem,2vw,1.25rem);line-height:1.7;margin:0 auto 2.5rem;max-width:700px}.hero-actions{gap:1rem;margin-bottom:3rem}.hero-actions,.subject-pills{align-items:center;display:flex;flex-wrap:wrap;justify-content:center}.subject-pills{gap:.75rem;margin:0 auto;max-width:600px}.subject-pill{align-items:center;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-full);box-shadow:var(--shadow-sm);color:hsl(var(--text));cursor:default;display:inline-flex;font-size:.875rem;font-weight:500;gap:.5rem;padding:.5rem 1rem;transition:all var(--transition-fast)}.subject-pill:hover{border-color:var(--pill-color);box-shadow:var(--shadow);transform:translateY(-2px)}.pill-icon{font-size:1.125rem;line-height:1}.more-pill{background:hsl(var(--primary-light));border-color:hsl(var(--border-light));color:hsl(var(--text-secondary))}.features-section{background:hsl(var(--surface));padding:5rem 1.5rem}.section-header{margin:0 auto 3.5rem;max-width:700px;text-align:center}.section-header h2{margin-bottom:1rem}.section-header p{color:hsl(var(--text-secondary));font-size:1.125rem}.features-grid{grid-gap:2rem;display:grid;gap:2rem;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));margin:0 auto;max-width:1200px}.feature-card{background:hsl(var(--background));border:1px solid hsl(var(--border));border-radius:var(--radius-lg);padding:2rem;text-align:center;transition:all var(--transition)}.feature-card:hover{border-color:hsl(var(--accent)/.3);box-shadow:var(--shadow-md);transform:translateY(-4px)}.feature-icon{align-items:center;background:hsl(var(--accent-light));border-radius:var(--radius-lg);color:hsl(var(--accent));display:flex;height:3.5rem;justify-content:center;margin:0 auto 1.25rem;transition:all var(--transition);width:3.5rem}.feature-card:hover .feature-icon{transform:scale(1.1)}.feature-card h3{color:hsl(var(--text));font-size:1.25rem;margin-bottom:.75rem}.feature-card p{font-size:.9375rem;line-height:1.7}.cta-section{background:hsl(var(--background));padding:5rem 1.5rem}.cta-card{background:linear-gradient(135deg,hsl(var(--accent-light)) 0,hsl(var(--secondary-light)) 100%);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);margin:0 auto;max-width:700px;padding:3.5rem 2rem;text-align:center}.cta-card h2{color:hsl(var(--text));font-size:clamp(1.75rem,4vw,2.5rem);margin-bottom:1rem}.cta-card p{color:hsl(var(--text-secondary));font-size:1.125rem;margin-bottom:2rem}.footer{background:hsl(var(--surface));border-top:1px solid hsl(var(--border));margin-top:auto;padding:3rem 1.5rem}.footer-content{margin:0 auto;max-width:1280px;text-align:center}.footer-brand{align-items:center;color:hsl(var(--text));display:inline-flex;font-size:1.125rem;font-weight:600;gap:.75rem;margin-bottom:.75rem}.footer-brand svg{color:hsl(var(--accent))}.footer-text{color:hsl(var(--text-secondary));font-size:.9375rem}@media (min-width:640px){.nav-login{display:inline-flex}}@media (max-width:768px){.hero{padding:4rem 1rem 3rem}.cta-section,.features-section{padding:3rem 1rem}.cta-card{padding:2.5rem 1.5rem}.hero-actions{flex-direction:column}.hero-actions .btn{max-width:300px;width:100%}}.subjects-page{background:hsl(var(--background));display:flex;flex-direction:column;min-height:100vh}.subjects-main{flex:1 1;padding:2rem 0 4rem}.subjects-header{margin:0 auto 3rem;max-width:800px;text-align:center}.back-link{align-items:center;border-radius:var(--radius);color:hsl(var(--text-secondary));display:inline-flex;font-size:.875rem;font-weight:500;gap:.375rem;margin-bottom:2rem;padding:.5rem 1rem;transition:all var(--transition-fast)}.back-link:hover{background:hsl(var(--border-light));color:hsl(var(--accent))}.subjects-header h1{margin-bottom:.75rem}.subjects-header p{color:hsl(var(--text-secondary));font-size:1.125rem;margin-bottom:2rem}.search-container{margin:0 auto;max-width:500px;position:relative}.search-input{background:hsl(var(--surface));border:1px solid hsl(var(--border));box-shadow:var(--shadow-sm);font-size:1rem}.search-input:focus{box-shadow:var(--shadow-md)}.subjects-content{margin:0 auto;max-width:1200px;padding:0 1.5rem}.subject-group{margin-bottom:3.5rem}.group-title{align-items:center;color:hsl(var(--text));display:flex;font-size:1.5rem;font-weight:600;gap:.5rem;margin-bottom:1.5rem}.subjects-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.subject-card{align-items:center;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);cursor:pointer;display:flex;gap:1.25rem;overflow:hidden;padding:1.75rem;position:relative;text-align:left;transition:all var(--transition)}.subject-card:before{background:var(--subject-color);content:"";height:100%;left:0;position:absolute;top:0;transform:scaleY(0);transform-origin:bottom;transition:transform var(--transition);width:4px}.subject-card:hover:before{transform:scaleY(1);transform-origin:top}.subject-card:hover{border-color:hsl(var(--border-light));box-shadow:var(--shadow-md);transform:translateY(-4px)}.subject-icon{align-items:center;background:hsl(var(--primary-light));border-radius:var(--radius-lg);display:flex;flex-shrink:0;font-size:1.75rem;height:3.5rem;justify-content:center;transition:all var(--transition);width:3.5rem}.subject-card:hover .subject-icon{transform:scale(1.1) rotate(5deg)}.subject-info{flex:1 1}.subject-info h3{color:hsl(var(--text));font-size:1.125rem;font-weight:600;margin-bottom:.5rem}.subject-action{align-items:center;color:hsl(var(--text-secondary));display:inline-flex;font-size:.875rem;font-weight:500;gap:.375rem;transition:all var(--transition-fast)}.subject-card:hover .subject-action{color:hsl(var(--accent));gap:.5rem}.subject-action svg{transition:transform var(--transition-fast)}.subject-card:hover .subject-action svg{transform:translateX(2px)}.empty-state{color:hsl(var(--text-secondary))}.empty-state p{font-size:1.125rem}@media (max-width:768px){.subjects-grid{grid-template-columns:1fr}.subject-group{margin-bottom:2.5rem}}.questions-page{background:hsl(var(--background));display:flex;flex-direction:column;min-height:100vh}.questions-main{display:flex;flex:1 1;gap:0;min-height:0}.sidebar{background:hsl(var(--surface));border-right:1px solid hsl(var(--border));display:flex;flex-direction:column;flex-shrink:0;height:calc(100vh - 73px);overflow:hidden;position:sticky;top:73px;width:300px}.sidebar-header{align-items:center;border-bottom:1px solid hsl(var(--border));display:flex;justify-content:space-between;padding:1.5rem}.sidebar-header h2{font-size:1.25rem;font-weight:600}.close-sidebar{background:#0000;border-radius:var(--radius);color:hsl(var(--text-secondary));display:none;padding:.5rem;transition:all var(--transition-fast)}.close-sidebar:hover{background:hsl(var(--border-light));color:hsl(var(--text))}.sidebar-content{flex:1 1;overflow-y:auto;padding:1.5rem}.filter-group{margin-bottom:2rem}.filter-label{color:hsl(var(--text));display:block;font-size:.875rem;font-weight:600;margin-bottom:.75rem}.filter-buttons{display:flex;flex-wrap:wrap;gap:.5rem}.filter-btn{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius);color:hsl(var(--text-secondary));cursor:pointer;font-size:.875rem;font-weight:500;padding:.5rem 1rem;transition:all var(--transition-fast)}.filter-btn:hover{border-color:hsl(var(--accent));color:hsl(var(--text))}.filter-btn.active{background:hsl(var(--accent));border-color:hsl(var(--accent));color:hsl(var(--text-inverse))}.topics-list{display:flex;flex-direction:column;gap:.5rem;max-height:300px;overflow-y:auto}.topic-checkbox{align-items:center;border-radius:var(--radius);cursor:pointer;display:flex;gap:.75rem;padding:.5rem;position:relative;transition:background var(--transition-fast)}.topic-checkbox:hover{background:hsl(var(--border-light))}.topic-checkbox input[type=checkbox]{cursor:pointer;height:0;opacity:0;position:absolute;width:0}.checkmark{border:2px solid hsl(var(--border));border-radius:.25rem;flex-shrink:0;height:1.125rem;position:relative;transition:all var(--transition-fast);width:1.125rem}.topic-checkbox input:checked~.checkmark{background:hsl(var(--accent));border-color:hsl(var(--accent))}.topic-checkbox input:checked~.checkmark:after{border:solid #fff;border-width:0 2px 2px 0;content:"";height:8px;left:4px;position:absolute;top:1px;transform:rotate(45deg);width:4px}.topic-name{color:hsl(var(--text));font-size:.875rem;line-height:1.4}.filter-select{color:hsl(var(--text));cursor:pointer;padding:.625rem .875rem}.clear-filters-btn,.filter-select{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius);font-size:.875rem;width:100%}.clear-filters-btn{align-items:center;color:hsl(var(--text-secondary));display:flex;font-weight:500;gap:.5rem;justify-content:center;margin-top:1rem;padding:.75rem;transition:all var(--transition-fast)}.clear-filters-btn:hover{background:hsl(var(--error));border-color:hsl(var(--error));color:#fff}.questions-content{display:flex;flex:1 1;flex-direction:column;min-width:0}.content-header{background:hsl(var(--surface));border-bottom:1px solid hsl(var(--border));padding:1.5rem;position:sticky;top:73px;z-index:50}.header-top{gap:1rem;justify-content:space-between;margin-bottom:1.5rem}.header-badges,.header-top{align-items:center;display:flex;flex-wrap:wrap}.header-badges{gap:.75rem}.subject-badge{align-items:center;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-full);box-shadow:var(--shadow-sm);display:inline-flex;font-size:.875rem;font-weight:500;gap:.5rem;padding:.5rem 1rem}.badge-icon{font-size:1.125rem}.lists-link{align-items:center;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-full);color:hsl(var(--text-secondary));display:inline-flex;font-size:.875rem;font-weight:500;gap:.375rem;padding:.5rem 1rem;transition:all var(--transition-fast)}.lists-link:hover{border-color:hsl(var(--accent));color:hsl(var(--accent))}.active-list-banner{align-items:center;background:hsl(var(--accent-light));border:1px solid hsl(var(--accent));border-radius:var(--radius);color:hsl(var(--text));display:flex;font-size:.9375rem;gap:.75rem;margin-bottom:1.5rem;padding:.875rem 1.25rem}.active-list-banner button{background:#0000;border-radius:var(--radius-sm);color:hsl(var(--text-secondary));margin-left:auto;padding:.25rem;transition:all var(--transition-fast)}.active-list-banner button:hover{background:hsl(var(--accent));color:#fff}.search-bar{display:flex;gap:.75rem;margin-bottom:1rem}.search-input-wrapper{flex:1 1;position:relative}.search-icon{color:hsl(var(--text-muted));left:1rem;pointer-events:none;position:absolute;top:50%;transform:translateY(-50%)}.search-input{border-radius:var(--radius-lg);padding-left:3rem;padding-right:3rem;width:100%}.clear-search{background:#0000;border-radius:var(--radius-sm);color:hsl(var(--text-muted));padding:.25rem;position:absolute;right:.75rem;top:50%;transform:translateY(-50%);transition:all var(--transition-fast)}.clear-search:hover{background:hsl(var(--border-light));color:hsl(var(--text))}.filter-toggle{align-items:center;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-lg);color:hsl(var(--text));display:none;font-weight:500;gap:.5rem;padding:.75rem 1.25rem;position:relative;transition:all var(--transition-fast)}.filter-toggle.has-filters,.filter-toggle:hover{border-color:hsl(var(--accent))}.filter-toggle.has-filters{color:hsl(var(--accent))}.filter-count{background:hsl(var(--accent));border-radius:var(--radius-full);color:#fff;font-size:.75rem;font-weight:600;height:1.25rem;justify-content:center;width:1.25rem}.filter-count,.results-info{align-items:center;display:flex}.results-info{gap:1rem;justify-content:space-between}.results-count{color:hsl(var(--text-secondary))}.pdf-toggle-btn,.results-count{font-size:.875rem;font-weight:500}.pdf-toggle-btn{align-items:center;background:hsl(var(--accent-light));border:1px solid hsl(var(--accent));border-radius:var(--radius);color:hsl(var(--accent));display:flex;gap:.5rem;padding:.5rem 1rem;transition:all var(--transition-fast)}.pdf-toggle-btn:hover{background:hsl(var(--accent));color:#fff}.pdf-toggle-btn svg.rotate{transform:rotate(180deg)}.pdf-panel{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin:1rem 1.5rem}.pdf-panel-header{align-items:center;border-bottom:1px solid hsl(var(--border));display:flex;justify-content:space-between;padding:1.25rem 1.5rem}.pdf-panel-header h3{align-items:center;display:flex;font-size:1.125rem;font-weight:600;gap:.5rem}.pdf-panel-header button{background:#0000;border-radius:var(--radius);color:hsl(var(--text-secondary));padding:.5rem;transition:all var(--transition-fast)}.pdf-panel-header button:hover{background:hsl(var(--border-light));color:hsl(var(--text))}.pdf-panel-content{padding:1.5rem}.pdf-custom-fields{grid-gap:1rem;display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin-bottom:1.5rem}.pdf-field label{color:hsl(var(--text));display:block;font-size:.875rem;font-weight:500;margin-bottom:.5rem}.pdf-field input{width:100%}.pdf-options-row{margin-bottom:1.5rem}.pdf-option{align-items:center;border-radius:var(--radius);cursor:pointer;display:flex;gap:.75rem;padding:.5rem;position:relative;transition:background var(--transition-fast)}.pdf-option:hover{background:hsl(var(--border-light))}.pdf-option input[type=checkbox]{height:0;opacity:0;position:absolute;width:0}.pdf-option .checkmark{height:1.25rem;width:1.25rem}.pdf-actions{align-items:center;display:flex;flex-wrap:wrap;gap:.75rem}.pdf-actions .btn{flex:1 1;min-width:150px}.loading-state{flex-direction:column;gap:1rem;padding:4rem 2rem}.loading-state p{color:hsl(var(--text-secondary))}.empty-state{align-items:center;display:flex;flex-direction:column;gap:1rem;justify-content:center;padding:4rem 2rem}.empty-state svg{color:hsl(var(--text-muted))}.empty-state h3{margin:.5rem 0}.empty-state p{color:hsl(var(--text-secondary));max-width:400px}.questions-list{display:flex;flex-direction:column;gap:1.5rem;padding:1.5rem}.question-card{border-radius:var(--radius-lg);padding:1.5rem;transition:all var(--transition)}.question-card:hover{box-shadow:var(--shadow)}.question-card.selected{background:hsl(var(--accent-light));border-color:hsl(var(--accent))}.question-card.highlight{animation:highlight 2s ease-out}@keyframes highlight{0%,to{background:hsl(var(--surface))}50%{background:hsl(var(--accent-light))}}.question-header{gap:1rem;justify-content:space-between;margin-bottom:1rem}.question-header,.question-meta{align-items:center;display:flex;flex-wrap:wrap}.question-meta{gap:.75rem}.question-id{background:hsl(var(--primary-light));border-radius:var(--radius);color:hsl(var(--text));font-family:Courier New,monospace;font-size:.875rem;font-weight:600;padding:.375rem .75rem}.question-tags{display:flex;gap:.5rem}.tag{border-radius:var(--radius-sm);font-size:.75rem;font-weight:600;letter-spacing:.025em;padding:.25rem .625rem;text-transform:uppercase}.tag-level{background:hsl(var(--secondary-light));color:hsl(var(--secondary))}.tag-paper{background:hsl(var(--accent-light));color:hsl(var(--accent))}.question-actions{gap:.5rem}.action-btn,.question-actions{align-items:center;display:flex}.action-btn{background:#0000;border:1px solid hsl(var(--border));border-radius:var(--radius);color:hsl(var(--text-secondary));height:2rem;justify-content:center;position:relative;transition:all var(--transition-fast);width:2rem}.action-btn:hover{background:hsl(var(--border-light));border-color:hsl(var(--text-muted));color:hsl(var(--text))}.action-btn.select-btn.active{background:hsl(var(--accent));border-color:hsl(var(--accent));color:#fff}.list-btn .list-count{align-items:center;background:hsl(var(--accent));border:2px solid hsl(var(--surface));border-radius:var(--radius-full);color:#fff;display:flex;font-size:.625rem;font-weight:600;height:1rem;justify-content:center;position:absolute;right:-6px;top:-6px;width:1rem}.question-topics{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1rem}.topic-tag{background:hsl(var(--background));border:1px solid hsl(var(--border));border-radius:var(--radius-full);color:hsl(var(--text-secondary));font-size:.8125rem;padding:.375rem .75rem}.question-footer{border-top:1px solid hsl(var(--border));display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.25rem;padding-top:1.25rem}.footer-btn{align-items:center;background:hsl(var(--background));border:1px solid hsl(var(--border));border-radius:var(--radius);color:hsl(var(--text-secondary));display:flex;font-size:.875rem;font-weight:500;gap:.5rem;padding:.5rem 1rem;transition:all var(--transition-fast)}.footer-btn:hover{background:hsl(var(--border-light));color:hsl(var(--text))}.footer-btn.active{background:hsl(var(--accent-light));border-color:hsl(var(--accent));color:hsl(var(--accent))}.expandable-content{border-radius:var(--radius);margin-top:1.25rem;overflow:hidden;padding:1.25rem}.ms-content{background:hsl(var(--accent-light));border-left:3px solid hsl(var(--accent))}.report-content{background:hsl(var(--secondary-light));border-left:3px solid hsl(var(--secondary))}.expandable-content h4{color:hsl(var(--text));font-size:1rem;font-weight:600;margin-bottom:.75rem}.content-body{font-size:.9375rem;line-height:1.7}.load-more{align-items:center;display:flex;flex-direction:column;gap:.75rem;padding:2rem 1.5rem}.page-info{color:hsl(var(--text-secondary));font-size:.875rem}.modal-overlay{animation:fadeIn .2s ease-out;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:hsl(var(--text)/.5)}.modal{animation:scaleIn .2s ease-out;display:flex;flex-direction:column;max-height:90vh;max-width:500px;overflow:hidden}.modal-header{border-bottom:1px solid hsl(var(--border));justify-content:space-between;padding:1.5rem}.modal-header,.modal-header h3{align-items:center;display:flex}.modal-header h3{font-size:1.25rem;font-weight:600;gap:.5rem}.modal-header button{background:#0000;border-radius:var(--radius);color:hsl(var(--text-secondary));padding:.5rem;transition:all var(--transition-fast)}.modal-header button:hover{background:hsl(var(--border-light));color:hsl(var(--text))}.modal-content{overflow-y:auto;padding:1.5rem}.share-id{color:hsl(var(--text-secondary));font-family:Courier New,monospace;font-size:.875rem;margin-bottom:1rem}.share-url-box{display:flex;gap:.5rem;margin-bottom:1rem}.share-url-input{background:hsl(var(--background));border:1px solid hsl(var(--border));color:hsl(var(--text));flex:1 1;font-family:Courier New,monospace;font-size:.875rem;padding:.75rem}.copy-btn,.share-url-input{border-radius:var(--radius)}.copy-btn{align-items:center;background:hsl(var(--accent));color:#fff;display:flex;flex-shrink:0;height:2.5rem;justify-content:center;transition:all var(--transition-fast);width:2.5rem}.copy-btn:hover{background:hsl(var(--accent-hover))}.copied-msg{color:hsl(var(--success));font-size:.875rem;font-weight:500}.lists-select{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1.5rem}.list-select-item{align-items:center;background:hsl(var(--background));border:1px solid hsl(var(--border));border-radius:var(--radius);color:hsl(var(--text));cursor:pointer;display:flex;font-size:.9375rem;justify-content:space-between;padding:.75rem 1rem;text-align:left;transition:all var(--transition-fast)}.list-select-item:hover{background:hsl(var(--border-light));border-color:hsl(var(--accent))}.list-select-item.in-list{background:hsl(var(--accent-light));border-color:hsl(var(--accent));color:hsl(var(--accent))}.no-lists-msg{color:hsl(var(--text-secondary));padding:2rem 1rem;text-align:center}.create-list-inline{display:flex;gap:.5rem}.create-list-inline input{flex:1 1}.error-page{align-items:center;display:flex;flex-direction:column;gap:1rem;justify-content:center;min-height:50vh;padding:2rem;text-align:center}.error-page svg{color:hsl(var(--error))}.error-page h2{margin:.5rem 0}.error-page p{margin-bottom:1rem;max-width:400px}.sidebar-overlay{display:none}@media (max-width:1024px){.sidebar{height:100vh;left:0;position:fixed;top:0;transform:translateX(-100%);transition:transform var(--transition);z-index:200}.sidebar.show{transform:translateX(0)}.sidebar-overlay{animation:fadeIn .2s ease-out;background:hsl(var(--text)/.5);display:block;inset:0;position:fixed;z-index:199}.close-sidebar,.filter-toggle{display:flex}}@media (max-width:768px){.question-card,.questions-list{padding:1rem}.pdf-panel{margin:1rem}.pdf-custom-fields{grid-template-columns:1fr}.pdf-actions{flex-direction:column}.pdf-actions .btn{width:100%}}.practice-layout{background:hsl(var(--background));display:flex;flex-direction:column;min-height:100vh}.practice-nav{align-items:center;background:hsl(var(--surface));border-bottom:1px solid hsl(var(--border));box-shadow:var(--shadow-sm);display:flex;gap:1rem;height:56px;padding:0 1.5rem;position:sticky;top:0;z-index:100}.practice-nav-brand{align-items:center;color:hsl(var(--text));display:flex;flex-shrink:0;font-family:Crimson Pro,serif;font-size:1.25rem;font-weight:600;gap:.5rem;text-decoration:none}.practice-nav-brand span.sep{color:hsl(var(--text-muted));font-weight:300}.practice-nav-links{align-items:center;display:flex;flex:1 1;gap:.25rem}.practice-nav-link{border-radius:var(--radius);color:hsl(var(--text-secondary));font-size:.875rem;font-weight:500;padding:.375rem .75rem;text-decoration:none;transition:all var(--transition-fast)}.practice-nav-link.active,.practice-nav-link:hover{background:hsl(var(--background));color:hsl(var(--text))}.practice-nav-actions{align-items:center;display:flex;gap:.5rem;margin-left:auto}.practice-content{flex:1 1;margin:0 auto;max-width:1100px;padding:2rem 1.5rem;width:100%}.page-header{align-items:center;display:flex;gap:1rem;justify-content:space-between;margin-bottom:2rem}.page-header h1{font-family:Crimson Pro,serif;font-size:1.875rem;font-weight:600}.login-page{align-items:center;background:hsl(var(--background));display:flex;flex-direction:column;justify-content:center;min-height:100vh;padding:2rem}.login-card{animation:slideUp var(--transition-slow) ease-out;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);max-width:380px;padding:2.5rem;width:100%}.login-logo{margin-bottom:2rem;text-align:center}.login-logo h2{font-family:Crimson Pro,serif;font-size:1.75rem;margin-bottom:.25rem}.login-logo p{color:hsl(var(--text-muted));font-size:.875rem}.login-form{display:flex;flex-direction:column;gap:1rem}.login-form label{color:hsl(var(--text-secondary));display:block;font-size:.875rem;font-weight:500;margin-bottom:.375rem}.login-error{background:hsl(var(--error)/.08);border-radius:var(--radius);color:hsl(var(--error));padding:.5rem}.login-back,.login-error{font-size:.875rem;text-align:center}.login-back{margin-top:1.5rem}.dashboard-grid{grid-gap:2rem;align-items:start;display:grid;gap:2rem;grid-template-columns:1fr 320px}.section-title{color:hsl(var(--text-muted));font-size:.8125rem;font-weight:600;letter-spacing:.06em;margin-bottom:1rem;text-transform:uppercase}.assessment-card{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-lg);color:inherit;display:block;margin-bottom:.75rem;padding:1.25rem 1.5rem;text-decoration:none;transition:all var(--transition-fast)}.assessment-card:hover{border-color:hsl(var(--accent)/.4);box-shadow:var(--shadow-md);transform:translateY(-1px)}.assessment-card-header{align-items:flex-start;display:flex;gap:1rem;justify-content:space-between;margin-bottom:.625rem}.assessment-card-name{color:hsl(var(--text));font-size:1rem;font-weight:600}.assessment-date-badge{background:hsl(var(--accent-light));border-radius:var(--radius-full);color:hsl(var(--accent));flex-shrink:0;font-size:.75rem;font-weight:500;padding:.25rem .625rem;white-space:nowrap}.assessment-date-badge.overdue{background:hsl(var(--error)/.1);color:hsl(var(--error))}.assessment-date-badge.soon{background:hsl(var(--warning)/.15);color:#e68600}.assessment-card-meta{color:hsl(var(--text-secondary));display:flex;flex-wrap:wrap;font-size:.8125rem;gap:.5rem}.meta-tag{background:hsl(var(--background));border:1px solid hsl(var(--border));border-radius:var(--radius-sm);font-size:.75rem;padding:.2rem .5rem}.assessment-card-footer{align-items:center;border-top:1px solid hsl(var(--border-light));display:flex;font-size:.8125rem;justify-content:space-between;margin-top:.875rem;padding-top:.875rem}.session-count{color:hsl(var(--text-muted))}.best-score{color:hsl(var(--accent));font-weight:600}.stats-sidebar{display:flex;flex-direction:column;gap:1.25rem}.stat-grid{grid-gap:.75rem;display:grid;gap:.75rem;grid-template-columns:1fr 1fr}.stat-card{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-lg);padding:1rem 1.125rem;text-align:center}.stat-value{color:hsl(var(--text));font-size:1.625rem;font-weight:700;line-height:1;margin-bottom:.25rem}.stat-label{color:hsl(var(--text-muted));font-size:.75rem;font-weight:500}.weak-area-list{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-lg);overflow:hidden}.weak-area-item{border-bottom:1px solid hsl(var(--border-light));padding:.875rem 1.125rem}.weak-area-item:last-child{border-bottom:none}.weak-area-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:.375rem}.weak-area-topic{color:hsl(var(--text));font-size:.875rem;font-weight:500}.weak-area-score{font-size:.8125rem;font-weight:600}.weak-area-score.low{color:hsl(var(--error))}.weak-area-score.mid{color:hsl(var(--warning))}.weak-area-score.ok{color:hsl(var(--accent))}.mini-progress{background:hsl(var(--border));border-radius:var(--radius-full);height:4px;overflow:hidden}.mini-progress-fill{border-radius:var(--radius-full);height:100%;transition:width .4s ease}.mini-progress-fill.low{background:hsl(var(--error))}.mini-progress-fill.mid{background:hsl(var(--warning))}.mini-progress-fill.ok{background:hsl(var(--accent))}.practice-form{max-width:680px}.form-section{margin-bottom:2rem}.form-section h3{border-bottom:1px solid hsl(var(--border-light));font-size:1rem;font-weight:600;margin-bottom:1rem;padding-bottom:.5rem}.form-row{grid-gap:1rem;display:grid;gap:1rem;grid-template-columns:1fr 1fr}.form-group{margin-bottom:1.25rem}.form-group label{color:hsl(var(--text-secondary));display:block;font-size:.875rem;font-weight:500;margin-bottom:.5rem}.form-hint{color:hsl(var(--text-muted));font-size:.8rem;margin-top:.375rem}.checkbox-group{display:flex;flex-wrap:wrap;gap:.5rem}.checkbox-label{align-items:center;background:hsl(var(--background));border:1px solid hsl(var(--border));border-radius:var(--radius);cursor:pointer;display:flex;font-size:.875rem;gap:.375rem;padding:.4rem .75rem;transition:all var(--transition-fast);-webkit-user-select:none;user-select:none}.checkbox-label:hover{background:hsl(var(--accent-light));border-color:hsl(var(--accent))}.checkbox-label input[type=checkbox]{margin:0;padding:0;width:auto}.assessment-detail-header{display:flex;flex-direction:column;gap:.5rem;margin-bottom:2rem}.assessment-detail-meta{display:flex;flex-wrap:wrap;gap:.5rem}.sessions-table{border-collapse:collapse;font-size:.875rem;width:100%}.sessions-table th{background:hsl(var(--background));border-bottom:1px solid hsl(var(--border));color:hsl(var(--text-secondary));font-size:.8125rem;font-weight:600;padding:.75rem 1rem;text-align:left}.sessions-table td{border-bottom:1px solid hsl(var(--border-light));color:hsl(var(--text));padding:.875rem 1rem}.sessions-table tr:last-child td{border-bottom:none}.grade-badge{align-items:center;border-radius:var(--radius);display:inline-flex;font-size:1rem;font-weight:700;height:2rem;justify-content:center;width:2rem}.grade-7{background:#2eb86026;color:#248f4b}.grade-6{background:#29a39526;color:#1f7a70}.grade-5{background:#0d7cf226;color:#0a63c2}.grade-4{background:#e7b00826;color:#ac8306}.grade-3{background:#f9741526;color:#d15a05}.grade-2{background:#dc282826;color:#b81e1e}.grade-1{background:#ad1f1f26;color:#8b1818}.mode-selector{grid-gap:.75rem;display:grid;gap:.75rem;grid-template-columns:repeat(2,1fr);margin:1.25rem 0}.mode-option{background:hsl(var(--surface));border:2px solid hsl(var(--border));border-radius:var(--radius-lg);cursor:pointer;padding:1rem;text-align:center;transition:all var(--transition-fast)}.mode-option:hover{border-color:hsl(var(--accent)/.5)}.mode-option.selected{background:hsl(var(--accent-light));border-color:hsl(var(--accent))}.mode-option-icon{font-size:1.75rem;margin-bottom:.5rem}.mode-option-label{color:hsl(var(--text));font-size:.9375rem;font-weight:600;margin-bottom:.25rem}.mode-option-desc{color:hsl(var(--text-muted));font-size:.75rem}.pdf-upload-area{background:hsl(var(--background));border:2px dashed hsl(var(--border));border-radius:var(--radius-lg);cursor:pointer;margin-bottom:.5rem;padding:1.25rem;text-align:center;transition:border-color var(--transition-fast),background var(--transition-fast)}.pdf-upload-area:hover{background:hsl(var(--accent-light));border-color:hsl(var(--accent)/.6)}.pdf-placeholder{color:hsl(var(--text-muted));flex-direction:column;font-size:.875rem;gap:.5rem}.pdf-placeholder,.pdf-selected{align-items:center;display:flex}.pdf-selected{flex-wrap:wrap;gap:.75rem;justify-content:center}.pdf-icon{font-size:1.5rem}.pdf-name{color:hsl(var(--text));font-size:.875rem;font-weight:500;word-break:break-all}.pdf-change{color:hsl(var(--text-muted));font-size:.75rem}.session-layout{background:hsl(var(--background));display:flex;flex-direction:column;min-height:100vh}.session-header{align-items:center;background:hsl(var(--surface));border-bottom:1px solid hsl(var(--border));display:flex;gap:1rem;justify-content:space-between;padding:.875rem 1.5rem}.session-header-info{min-width:0}.session-header-title{font-size:1rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.session-header-sub{color:hsl(var(--text-muted));font-size:.8125rem}.session-progress-bar{flex:1 1;max-width:300px}.session-progress-track{background:hsl(var(--border));border-radius:var(--radius-full);height:6px;overflow:hidden}.session-progress-fill{background:hsl(var(--accent));border-radius:var(--radius-full);height:100%;transition:width .5s ease}.session-progress-label{color:hsl(var(--text-muted));font-size:.75rem;margin-top:.25rem;text-align:right}.session-body{flex:1 1;margin:0 auto;max-width:860px;padding:2rem 1.5rem;width:100%}.question-card{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);margin-bottom:1.5rem;padding:1.75rem 2rem}.question-label{color:hsl(var(--text-muted));font-size:.75rem;font-weight:600;letter-spacing:.06em;margin-bottom:1rem;text-transform:uppercase}.question-body{color:hsl(var(--text));font-family:Crimson Pro,Times New Roman,Times,serif;font-size:1.0625rem;line-height:1.8}.question-body *{background:#0000!important}.question-body img{border-radius:var(--radius);height:auto;max-width:100%}.question-body p{margin:0 0 1rem}.question-body p:last-child{margin-bottom:0}.question-body ol,.question-body ul{margin:.5rem 0 1rem 1.5rem}.question-body li{margin-bottom:.75rem;padding-left:.25rem}.question-body li:last-child{margin-bottom:0}.answer-card{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);padding:1.5rem 2rem}.answer-label{color:hsl(var(--text-muted));font-size:.75rem;font-weight:600;letter-spacing:.06em;margin-bottom:1rem;text-transform:uppercase}.answer-textarea{font-family:Crimson Pro,serif;font-size:1rem;line-height:1.7;min-height:160px;resize:vertical}.answer-image-section{border-top:1px dashed hsl(var(--border));margin-top:1rem;padding-top:1rem}.image-upload-label{align-items:center;border:1px dashed hsl(var(--border));border-radius:var(--radius);color:hsl(var(--text-secondary));cursor:pointer;display:flex;font-size:.875rem;gap:.5rem;padding:.625rem 1rem;transition:all var(--transition-fast);width:fit-content}.image-upload-label:hover{border-color:hsl(var(--accent));color:hsl(var(--accent))}.image-preview{margin-top:.75rem;position:relative;width:fit-content}.image-preview img{border:1px solid hsl(var(--border));border-radius:var(--radius);max-height:200px;max-width:100%}.image-remove{background:hsl(var(--error));border:none;border-radius:var(--radius-full);color:#fff;cursor:pointer;font-size:.875rem;height:1.5rem;justify-content:center;position:absolute;right:-.5rem;top:-.5rem;width:1.5rem}.answer-actions,.image-remove{align-items:center;display:flex}.answer-actions{gap:.75rem;margin-top:1.25rem}.answer-hint{color:hsl(var(--text-muted));flex:1 1;font-size:.8125rem}.feedback-card{animation:slideUp var(--transition-slow) ease-out;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);margin-bottom:1.5rem;padding:1.75rem 2rem}.feedback-score-row{align-items:center;border-bottom:1px solid hsl(var(--border-light));display:flex;gap:1.5rem;margin-bottom:1.5rem;padding-bottom:1.25rem}.feedback-marks{color:hsl(var(--text));font-size:2rem;font-weight:700;line-height:1}.feedback-marks-denom{color:hsl(var(--text-muted));font-size:1.125rem;font-weight:400}.feedback-pct{color:hsl(var(--text-secondary));font-size:1rem}.feedback-progress{background:hsl(var(--border));border-radius:var(--radius-full);flex:1 1;height:10px;overflow:hidden}.feedback-progress-fill{border-radius:var(--radius-full);height:100%;transition:width .6s ease}.feedback-progress-fill.high{background:hsl(var(--success))}.feedback-progress-fill.mid{background:hsl(var(--warning))}.feedback-progress-fill.low{background:hsl(var(--error))}.feedback-section{margin-bottom:1.25rem}.feedback-section-title{align-items:center;display:flex;font-size:.875rem;font-weight:600;gap:.5rem;margin-bottom:.625rem}.feedback-list{display:flex;flex-direction:column;gap:.375rem;list-style:none}.feedback-list li{border-radius:var(--radius);font-size:.9375rem;line-height:1.5;padding:.5rem .75rem}.feedback-list.strengths li{background:#2eb86014;color:hsl(var(--text))}.feedback-list.improvements li{background:#dc282814;color:hsl(var(--text))}.model-answer-box{background:hsl(var(--background));border:1px solid hsl(var(--border-light));border-radius:var(--radius);color:hsl(var(--text));font-family:Crimson Pro,serif;font-size:1rem;line-height:1.7;padding:1rem 1.25rem}.model-answer-box p{margin:0 0 .875rem}.model-answer-box p:last-child{margin-bottom:0}.model-answer-box ol,.model-answer-box ul{margin:.375rem 0 .875rem 1.5rem}.model-answer-box li{margin-bottom:.5rem}.model-answer-box li:last-child{margin-bottom:0}.feedback-actions{display:flex;gap:.75rem;justify-content:flex-end;margin-top:1.5rem}.generating-card{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);padding:3rem;text-align:center}.generating-spinner{animation:spin .9s linear infinite;border:3px solid hsl(var(--border));border-radius:50%;border-top-color:hsl(var(--accent));height:2.5rem;margin:0 auto 1rem;width:2.5rem}.generating-text{color:hsl(var(--text-secondary));font-size:1rem}.summary-card{animation:slideUp var(--transition-slow) ease-out;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-xl);box-shadow:var(--shadow-md);margin:0 auto;max-width:680px;padding:2.5rem}.summary-score-ring{margin-bottom:2rem;text-align:center}.summary-percentage{color:hsl(var(--text));font-size:4rem;font-weight:700;line-height:1;margin-bottom:.5rem}.summary-marks{color:hsl(var(--text-muted));font-size:1.125rem}.summary-grade-row{align-items:center;display:flex;font-size:1.125rem;font-weight:600;gap:.75rem;justify-content:center;margin-bottom:2rem}.summary-attempts{border-top:1px solid hsl(var(--border-light));margin-top:.5rem;padding-top:1.5rem}.attempt-row{align-items:center;border-bottom:1px solid hsl(var(--border-light));display:flex;font-size:.9375rem;gap:1rem;justify-content:space-between;padding:.75rem 0}.attempt-row:last-child{border-bottom:none}.attempt-topic{color:hsl(var(--text-secondary));flex:1 1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attempt-marks{color:hsl(var(--text));font-weight:600;white-space:nowrap}.summary-actions{display:flex;gap:.75rem;justify-content:center;margin-top:2rem}.analytics-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:1fr 1fr;margin-bottom:1.5rem}.analytics-card{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:var(--radius-lg);padding:1.5rem}.analytics-card h3{font-size:1rem;font-weight:600;margin-bottom:1rem}.empty-state{color:hsl(var(--text-muted));padding:3rem 1.5rem;text-align:center}.empty-state-icon{font-size:3rem;margin-bottom:1rem}.empty-state h3{color:hsl(var(--text-secondary));font-size:1.125rem;font-weight:600;margin-bottom:.5rem}.empty-state p{font-size:.9375rem;margin-bottom:1.5rem}.loading-state{align-items:center;color:hsl(var(--text-muted));display:flex;font-size:.9375rem;gap:.75rem;justify-content:center;padding:3rem}.spinner{animation:spin .8s linear infinite;border:2px solid hsl(var(--border));border-radius:50%;border-top-color:hsl(var(--accent));height:1.25rem;width:1.25rem}.modal-overlay{align-items:center;animation:fadeIn var(--transition-fast) ease-out;background:#0006;display:flex;inset:0;justify-content:center;padding:1rem;position:fixed;z-index:1000}.modal{animation:scaleIn var(--transition) ease-out;background:hsl(var(--surface));border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);max-width:480px;padding:2rem;width:100%}.modal h2{font-size:1.25rem;margin-bottom:.5rem}.modal p{font-size:.9375rem;margin-bottom:1.5rem}.modal-actions{display:flex;gap:.75rem;justify-content:flex-end}.question-meta-row{align-items:center;display:flex;gap:1rem;justify-content:space-between;margin-bottom:1rem}.btn-skip{align-items:center;background:#0000;border:1px solid hsl(var(--border));border-radius:var(--radius);color:hsl(var(--text-muted));cursor:pointer;display:inline-flex;flex-shrink:0;font-size:.8125rem;font-weight:500;gap:.375rem;padding:.3rem .75rem;transition:all var(--transition-fast);white-space:nowrap}.btn-skip:hover{background:hsl(var(--warning)/.08);border-color:hsl(var(--warning));color:#d67d00}.grade-revised-badge{align-items:center;background:hsl(var(--success)/.15);border:1px solid hsl(var(--success)/.35);border-radius:99px;color:hsl(var(--success));display:inline-flex;font-size:.65rem;font-weight:600;letter-spacing:.04em;margin-left:.5rem;padding:.1rem .45rem;text-transform:uppercase;vertical-align:middle}.dispute-section{margin:.75rem 0 .25rem}.btn-dispute{align-items:center;background:none;border:1px solid hsl(var(--border));border-radius:6px;color:hsl(var(--text-secondary));cursor:pointer;display:inline-flex;font-size:.8125rem;gap:.35rem;padding:.35rem .85rem;transition:border-color .15s,color .15s,background .15s}.btn-dispute.open,.btn-dispute:hover{border-color:hsl(var(--accent));color:hsl(var(--accent))}.btn-dispute.open{background:hsl(var(--accent)/.07)}.dispute-chat-panel{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:10px;margin-top:.75rem;overflow:hidden}.dispute-messages{display:flex;flex-direction:column;gap:.6rem;max-height:280px;overflow-y:auto;padding:.75rem}.dispute-hint{color:hsl(var(--text-muted));font-size:.8rem;font-style:italic;padding:.5rem 0;text-align:center}.dispute-msg{border-radius:10px;font-size:.85rem;line-height:1.5;max-width:88%;padding:.55rem .8rem}.dispute-msg.user{align-self:flex-end;background:hsl(var(--accent)/.12);border-bottom-right-radius:3px;color:hsl(var(--text))}.dispute-msg.ai{align-self:flex-start;background:hsl(var(--surface));border:1px solid hsl(var(--border));border-bottom-left-radius:3px;color:hsl(var(--text))}.dispute-typing{align-items:center;display:flex;gap:4px;padding:.65rem .8rem}.typing-dot{animation:typing-bounce 1.2s ease-in-out infinite;background:hsl(var(--text-muted));border-radius:50%;height:6px;width:6px}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typing-bounce{0%,80%,to{opacity:.5;transform:scale(.7)}40%{opacity:1;transform:scale(1)}}.dispute-input-row{background:hsl(var(--bg));border-top:1px solid hsl(var(--border));display:flex;gap:.5rem;padding:.6rem .75rem}.dispute-input{background:hsl(var(--surface));border:1px solid hsl(var(--border));border-radius:6px;color:hsl(var(--text));flex:1 1;font-size:.85rem;outline:none;padding:.45rem .7rem;transition:border-color .15s}.dispute-input:focus{border-color:hsl(var(--accent))}.dispute-input::placeholder{color:hsl(var(--text-muted))}.dispute-input:disabled{opacity:.5}.btn-dispute-send{background:hsl(var(--accent));border:none;border-radius:6px;color:#fff;cursor:pointer;font-size:.85rem;font-weight:500;padding:.45rem 1rem;transition:opacity .15s;white-space:nowrap}.btn-dispute-send:disabled{cursor:default;opacity:.4}.btn-dispute-send:not(:disabled):hover{opacity:.85}.feedback-utility-row{align-items:center;border-top:1px solid hsl(var(--border-light));display:flex;flex-wrap:wrap;gap:.75rem;margin-top:.5rem;padding:1rem 0}.btn-doubt{align-items:center;background:#0000;border:1px solid hsl(var(--border));border-radius:var(--radius);color:hsl(var(--text-secondary));cursor:pointer;display:inline-flex;font-size:.875rem;font-weight:500;gap:.375rem;padding:.4rem .875rem;transition:all var(--transition-fast)}.btn-doubt:hover{background:#dc28280f;border-color:#dc282880;color:#b81e1e}.btn-doubt.active{background:#dc28281a;border-color:#dc2828;color:#b81e1e;font-weight:600}.btn-save-q{align-items:center;background:#0000;border:1px solid hsl(var(--border));border-radius:var(--radius);color:hsl(var(--text-secondary));cursor:pointer;display:inline-flex;font-size:.875rem;font-weight:500;gap:.375rem;padding:.4rem .875rem;transition:all var(--transition-fast)}.btn-save-q:hover:not(:disabled){background:hsl(var(--accent-light));border-color:hsl(var(--accent)/.5);color:hsl(var(--accent))}.btn-save-q.saved,.btn-save-q:disabled{background:hsl(var(--accent-light));border-color:hsl(var(--accent)/.4);color:hsl(var(--accent));cursor:default;opacity:.85}.summary-doubts{border-top:1px solid hsl(var(--border-light));margin-top:1.5rem;padding-top:1.5rem}.doubt-row{align-items:center;border-bottom:1px solid hsl(var(--border-light));display:flex;font-size:.9375rem;gap:1rem;padding:.625rem 0}.doubt-row:last-of-type{border-bottom:none}.doubt-label{color:#dc2828;flex-shrink:0;font-size:.8125rem;font-weight:600}.doubt-topic{color:hsl(var(--text-secondary));flex:1 1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.doubt-marks{color:hsl(var(--text));font-weight:600;white-space:nowrap}.chat-trigger{margin-bottom:1rem}.btn-open-chat{align-items:center;background:hsl(var(--accent-light));border:1px dashed hsl(var(--accent)/.5);border-radius:var(--radius);color:hsl(var(--accent));cursor:pointer;display:inline-flex;font-size:.875rem;font-weight:500;gap:.4rem;padding:.45rem .875rem;transition:all var(--transition-fast)}.btn-open-chat:hover{background:hsl(var(--accent-light));border-color:hsl(var(--accent));border-style:solid}.question-chat-panel{background:hsl(var(--surface));border:1px solid hsl(var(--accent)/.25);border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);margin-bottom:1rem;overflow:hidden}.chat-panel-header{align-items:center;background:hsl(var(--accent-light));border-bottom:1px solid hsl(var(--accent)/.15);display:flex;gap:.75rem;padding:.75rem 1.25rem}.chat-panel-title{color:hsl(var(--accent));flex-shrink:0;font-size:.9375rem;font-weight:600}.chat-panel-hint{color:hsl(var(--text-muted));flex:1 1;font-size:.8rem;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-close{background:none;border:none;color:hsl(var(--text-muted));cursor:pointer;flex-shrink:0;font-size:1rem;line-height:1;padding:.25rem;transition:color var(--transition-fast)}.chat-close:hover{color:hsl(var(--text))}.chat-messages-box{display:flex;flex-direction:column;gap:.625rem;max-height:320px;overflow-y:auto;padding:1rem 1.25rem}.chat-placeholder{color:hsl(var(--text-muted));font-size:.875rem;font-style:italic;padding:1rem 0;text-align:center}.chat-bubble{border-radius:var(--radius-lg);font-size:.9375rem;line-height:1.55;max-width:88%;padding:.6rem .875rem;word-break:break-word}.chat-bubble-user{align-self:flex-end;background:hsl(var(--accent));border-bottom-right-radius:var(--radius-sm);color:#fff}.chat-bubble-assistant{align-self:flex-start;background:hsl(var(--background));border:1px solid hsl(var(--border));border-bottom-left-radius:var(--radius-sm);color:hsl(var(--text))}.chat-bubble-loading{padding:.75rem 1rem}.chat-dots{align-items:center;display:inline-flex;gap:4px}.chat-dots span{animation:chatDot 1.2s ease-in-out infinite;background:hsl(var(--text-muted));border-radius:50%;height:7px;width:7px}.chat-dots span:nth-child(2){animation-delay:.2s}.chat-dots span:nth-child(3){animation-delay:.4s}@keyframes chatDot{0%,80%,to{opacity:.4;transform:scale(.7)}40%{opacity:1;transform:scale(1)}}.chat-mod-card{align-self:stretch;background:hsl(var(--accent-light));border:1px solid hsl(var(--accent)/.4);border-radius:var(--radius-lg);display:flex;flex-direction:column;gap:.75rem;padding:.875rem 1rem}.chat-mod-label{color:hsl(var(--accent));font-size:.8125rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase}.chat-mod-preview{color:hsl(var(--text));font-family:Crimson Pro,serif;font-size:.9375rem;line-height:1.7}.chat-input-row{background:hsl(var(--surface));border-top:1px solid hsl(var(--border-light));display:flex;gap:.5rem;padding:.75rem 1.25rem}.chat-input{background:hsl(var(--background));border:1px solid hsl(var(--border));border-radius:var(--radius);color:hsl(var(--text));flex:1 1;font-size:.9375rem;outline:none;padding:.5rem .875rem;transition:border-color var(--transition-fast)}.chat-input:focus{border-color:hsl(var(--accent))}.chat-input:disabled{cursor:not-allowed;opacity:.6}.btn-download-pdf{align-items:center;background:hsl(var(--accent));border:none;border-radius:var(--radius);color:#fff;cursor:pointer;display:inline-flex;font-size:.9375rem;font-weight:600;gap:.5rem;margin-top:1rem;padding:.625rem 1.25rem;transition:opacity var(--transition-fast)}.btn-download-pdf:hover{opacity:.88}@media (max-width:900px){.analytics-grid,.dashboard-grid,.form-row,.mode-selector{grid-template-columns:1fr}}@media (max-width:640px){.practice-nav-links{display:none}.practice-content{padding:1.25rem 1rem}.session-body{padding:1rem}.answer-card,.feedback-card,.question-card{padding:1.25rem}.summary-card{padding:1.5rem}.session-progress-bar{display:none}}.app{min-height:100vh}
/*# sourceMappingURL=main.c9c276b9.css.map*/