:root{--bg: #07080c;--bg-elevated: #0e1017;--bg-hover: #151824;--surface: rgba(255, 255, 255, .045);--surface-strong: rgba(255, 255, 255, .075);--surface-border: rgba(255, 255, 255, .09);--text: #f2f3f7;--text-muted: #9aa0ae;--text-faint: #666c7a;--primary-a: #6d5ef8;--primary-b: #22d3ee;--gradient-signature: linear-gradient(135deg, var(--primary-a), var(--primary-b));--accent-amber: #f5a623;--accent-green: #34d399;--accent-rose: #fb7185;--shadow-soft: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 32px -12px rgba(0, 0, 0, .55);--shadow-glow: 0 0 0 1px rgba(109, 94, 248, .25), 0 8px 40px -8px rgba(109, 94, 248, .35);--radius-sm: 10px;--radius-md: 16px;--radius-lg: 24px;--radius-xl: 32px;--font-display: "Space Grotesk", "Inter", sans-serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace;--header-h: 76px;--ease: cubic-bezier(.22, 1, .36, 1)}[data-theme=light]{--bg: #f5f6fb;--bg-elevated: #ffffff;--bg-hover: #eef0f8;--surface: rgba(255, 255, 255, .7);--surface-strong: rgba(255, 255, 255, .92);--surface-border: rgba(15, 17, 23, .08);--text: #14151a;--text-muted: #5b6270;--text-faint: #9aa0ae;--shadow-soft: 0 1px 2px rgba(20, 21, 26, .05), 0 12px 32px -14px rgba(20, 21, 26, .18);--shadow-glow: 0 0 0 1px rgba(109, 94, 248, .15), 0 8px 40px -8px rgba(109, 94, 248, .2)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:var(--font-body);-webkit-font-smoothing:antialiased;transition:background .35s var(--ease),color .35s var(--ease);min-height:100vh;overflow-x:hidden}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;pointer-events:none;background:radial-gradient(650px circle at 15% -10%,rgba(109,94,248,.16),transparent 60%),radial-gradient(550px circle at 90% 10%,rgba(34,211,238,.12),transparent 55%);opacity:1;transition:opacity .35s var(--ease)}[data-theme=light] body:before{opacity:.6}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}img,svg{display:block;max-width:100%}::selection{background:#6d5ef859}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--surface-strong);border-radius:20px;border:2px solid transparent;background-clip:content-box}.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}.mono{font-family:var(--font-mono)}.gradient-text{background:var(--gradient-signature);-webkit-background-clip:text;background-clip:text;color:transparent}.glass{background:var(--surface);border:1px solid var(--surface-border);backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%)}.glass-strong{background:var(--surface-strong);border:1px solid var(--surface-border);backdrop-filter:blur(28px) saturate(180%);-webkit-backdrop-filter:blur(28px) saturate(180%)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:var(--radius-sm);font-weight:600;font-size:14.5px;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);white-space:nowrap}.btn:active{transform:scale(.97)}.btn-primary{background:var(--gradient-signature);color:#fff;box-shadow:var(--shadow-glow)}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px #6d5ef859,0 14px 44px -10px #6d5ef880}.btn-ghost{background:var(--surface);border:1px solid var(--surface-border);color:var(--text)}.btn-ghost:hover{background:var(--bg-hover);border-color:#6d5ef866}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;background:var(--surface);border:1px solid var(--surface-border);color:var(--text-muted);transition:all .2s var(--ease)}.icon-btn:hover{color:var(--text);border-color:#6d5ef866;background:var(--bg-hover);transform:translateY(-1px)}.folder-card{position:relative;border-radius:var(--radius-lg);padding:28px;background:var(--surface);border:1px solid var(--surface-border);backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);transition:transform .35s var(--ease),border-color .3s var(--ease),box-shadow .35s var(--ease);overflow:hidden}.folder-card:before{content:"";position:absolute;top:-1px;left:24px;width:56px;height:10px;border-radius:0 0 8px 8px;background:var(--gradient-signature);opacity:.85}.folder-card:hover{transform:translateY(-4px);border-color:#6d5ef859;box-shadow:var(--shadow-soft)}.path-trail{display:flex;align-items:center;flex-wrap:wrap;gap:4px;font-family:var(--font-mono);font-size:13.5px;color:var(--text-muted)}.path-trail .seg{padding:5px 10px;border-radius:8px;transition:background .2s var(--ease),color .2s var(--ease)}.path-trail .seg:hover{background:var(--surface);color:var(--text)}.path-trail .seg.current{color:var(--text);font-weight:600}.path-trail .sep{color:var(--text-faint)}@keyframes fadeUp{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleIn{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.animate-fadeUp{animation:fadeUp .6s var(--ease) both}.animate-fadeIn{animation:fadeIn .5s var(--ease) both}.animate-scaleIn{animation:scaleIn .25s var(--ease) both}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.001ms!important;transition-duration:.001ms!important}}a:focus-visible,button:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--primary-b);outline-offset:2px;border-radius:8px}h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;letter-spacing:-.02em;line-height:1.15}p{line-height:1.6;color:var(--text-muted)}.scroll-panel{overflow-y:auto;scrollbar-gutter:stable}.skeleton{background:linear-gradient(90deg,var(--surface) 25%,var(--surface-strong) 37%,var(--surface) 63%);background-size:400% 100%;animation:skeleton-loading 1.4s ease infinite;border-radius:10px}@keyframes skeleton-loading{0%{background-position:100% 50%}to{background-position:0 50%}}.navbar{position:sticky;top:0;z-index:100;height:var(--header-h);border-left:none;border-right:none;border-top:none}.navbar-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:18px}.brand-mark{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:var(--gradient-signature);color:#fff}.navbar-links{display:flex;align-items:center;gap:28px;font-size:14.5px;font-weight:500;color:var(--text-muted)}.navbar-links a:hover{color:var(--text)}.navbar-actions{display:flex;align-items:center;gap:10px}@media (max-width: 860px){.navbar-links{display:none}}.hero{position:relative;padding:96px 0 64px;overflow:hidden}.hero-inner{max-width:760px}.hero-eyebrow{display:inline-block;color:var(--primary-b);font-size:13px;margin-bottom:20px;letter-spacing:.02em}.hero-title{font-size:clamp(34px,5.4vw,58px);margin-bottom:20px}.hero-sub{font-size:17px;max-width:560px;margin-bottom:32px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap}.hero-grid-fade{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1;background-image:linear-gradient(var(--surface-border) 1px,transparent 1px),linear-gradient(90deg,var(--surface-border) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(ellipse 900px 420px at 20% 0%,black,transparent 70%);-webkit-mask-image:radial-gradient(ellipse 900px 420px at 20% 0%,black,transparent 70%);opacity:.5}.section{padding:56px 0}.section-head{margin-bottom:28px}.section-head h2,.section-head h1{font-size:clamp(24px,3vw,32px);margin-bottom:8px}.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.stat-card{border-radius:var(--radius-md);padding:22px 20px;display:flex;flex-direction:column;gap:6px}.stat-value{font-size:30px;font-weight:700;font-family:var(--font-display)}.stat-label{font-size:13px;color:var(--text-muted)}@media (max-width: 760px){.stats-row{grid-template-columns:repeat(2,1fr)}}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px}.years-grid{grid-template-columns:repeat(3,1fr)}@media (max-width: 900px){.years-grid{grid-template-columns:1fr}}.year-card{display:flex;flex-direction:column;min-height:220px}.year-card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.year-card-index{font-size:13px;color:var(--text-faint)}.year-card-arrow{color:var(--text-faint);transition:transform .25s var(--ease),color .25s var(--ease)}.folder-card:hover .year-card-arrow{transform:translate(2px,-2px);color:var(--primary-b)}.year-card-title{font-size:21px;margin-bottom:6px}.year-card-desc{font-size:13.5px;margin-bottom:18px}.year-card-subjects{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.subject-chip{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;background:var(--surface-strong);color:var(--text-muted)}.year-card-foot{display:flex;justify-content:space-between;font-size:12.5px;color:var(--text-faint);margin-top:auto;padding-top:14px;border-top:1px solid var(--surface-border)}.subject-card{min-height:168px;display:flex;flex-direction:column}.subject-card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.subject-card-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:11px;background:var(--gradient-signature);color:#fff}.subject-card-title{font-size:18px;margin-bottom:6px}.subject-card-type{font-size:11.5px;color:var(--text-faint);margin-bottom:auto}.tile-card{min-height:140px;display:flex;flex-direction:column;padding:22px}.tile-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.tile-icon{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:var(--surface-strong);color:var(--text-muted)}.tile-icon.pdf{color:var(--accent-rose)}.tile-title{font-size:15px;font-weight:600;line-height:1.35;word-break:break-word}.pdf-tile{cursor:pointer}.download-mini{width:32px;height:32px}.empty-state{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center;padding:56px 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var(--ease)}.continue-card:hover{transform:translateY(-3px)}.continue-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:var(--gradient-signature);color:#fff;flex-shrink:0}.continue-body{display:flex;flex-direction:column;gap:6px;flex:1;min-width:0}.continue-name{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.continue-meta{font-size:11.5px;color:var(--text-faint)}.progress-bar{height:5px;border-radius:4px;background:var(--surface-strong);overflow:hidden;margin-top:2px}.progress-bar-fill{height:100%;background:var(--gradient-signature);border-radius:4px}.continue-time{display:flex;align-items:center;gap:4px;font-size:11px;color:var(--text-faint);flex-shrink:0}.path-trail{margin-bottom:4px}.search-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;background:#0405088c;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:flex-start;justify-content:center;padding:12vh 20px 20px}.search-modal{width:100%;max-width:620px;border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 30px 80px -20px #0009}.search-input-row{display:flex;align-items:center;gap:12px;padding:18px 20px;border-bottom:1px solid var(--surface-border)}.search-input-row input{flex:1;background:none;border:none;color:var(--text);font-size:16px;outline:none}.search-icon{color:var(--text-faint);flex-shrink:0}.search-results{max-height:50vh;padding:8px}.search-hint{padding:24px 16px;text-align:center;font-size:13.5px}.search-result-row{display:flex;align-items:center;gap:12px;width:100%;padding:11px 12px;border-radius:10px;text-align:left;transition:background .15s var(--ease)}.search-result-row:hover{background:var(--surface)}.result-icon{color:var(--text-faint);flex-shrink:0}.result-icon.pdf{color:var(--accent-rose)}.result-text{display:flex;flex-direction:column;gap:2px;flex:1;min-width:0}.result-name{font-size:14px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.result-path{font-size:11.5px;color:var(--text-faint);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.result-enter{color:var(--text-faint);flex-shrink:0}.pdf-page h1.pdf-title{font-size:22px;margin:14px 0 18px}.pdf-viewer{border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;height:78vh}.pdf-viewer:fullscreen{height:100vh;border-radius:0}.pdf-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-bottom:1px solid var(--surface-border);flex-wrap:wrap}.pdf-toolbar-group{display:flex;align-items:center;gap:8px}.pdf-page-input{display:flex;align-items:center;gap:5px;font-size:13px;color:var(--text-muted)}.pdf-page-input input{width:40px;text-align:center;background:var(--surface);border:1px solid var(--surface-border);border-radius:8px;padding:6px 4px;color:var(--text);font-family:var(--font-mono);font-size:13px}.pdf-zoom-value{font-size:12.5px;color:var(--text-muted);width:42px;text-align:center}.pdf-download-btn{padding:9px 16px;font-size:13.5px;margin-left:4px}.pdf-canvas-wrap{flex:1;display:flex;justify-content:center;padding:24px;background:repeating-linear-gradient(135deg,rgba(255,255,255,.015),rgba(255,255,255,.015) 2px,transparent 2px,transparent 14px)}.pdf-canvas{box-shadow:0 10px 40px #00000059;border-radius:4px;height:fit-content}.pdf-status{margin:auto;display:flex;flex-direction:column;align-items:center;gap:10px;color:var(--text-muted);font-size:14px}.pdf-status.error{color:var(--accent-rose)}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.settings-group{margin-bottom:34px}.settings-group-title{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint);margin-bottom:12px;font-family:var(--font-mono)}.settings-row{display:flex;align-items:center;gap:16px;padding:16px 18px;border-radius:var(--radius-md);margin-bottom:10px}.settings-row-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;background:var(--surface-strong);color:var(--primary-b);flex-shrink:0}.settings-row-text{flex:1}.settings-row-text h4{font-size:14.5px;margin-bottom:3px}.settings-row-text p{font-size:12.5px;margin:0}.theme-switch{display:flex;background:var(--surface);border:1px solid var(--surface-border);border-radius:10px;padding:3px;gap:3px}.theme-switch-opt{display:flex;align-items:center;gap:6px;padding:7px 12px;border-radius:7px;font-size:12.5px;font-weight:500;color:var(--text-muted)}.theme-switch-opt.active{background:var(--gradient-signature);color:#fff}.settings-select{background:var(--surface);border:1px solid var(--surface-border);border-radius:8px;padding:8px 10px;color:var(--text);font-size:13px}.btn.danger{color:var(--accent-rose);border-color:#fb71854d}.btn.danger:hover{background:#fb718514}.footer{border-top:1px solid var(--surface-border);padding:26px 0;margin-top:40px}.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:12.5px;color:var(--text-faint)}@media (max-width: 640px){.hero{padding:64px 0 40px}.stats-row{grid-template-columns:1fr 1fr}.pdf-viewer{height:70vh}.pdf-toolbar{justify-content:center}}