@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");:root,[data-theme=dark]{--bg:#09090f;--bg-elevated:#12121a;--surface:#181824;--surface-hover:#222230;--text:#f4f4f8;--text-muted:#9ca3af;--text-dim:#6b7280;--accent:#6366f1;--accent-hover:#818cf8;--accent-glow:rgba(99,102,241,.25);--border:#2a2a3a;--border-subtle:#1f1f2e;--success:#34d399;--thumb-gradient:linear-gradient(135deg,#312e81,#1e1b4b)}[data-theme=light]{--bg:#f4f6fb;--bg-elevated:#fff;--surface:#fff;--surface-hover:#eef2ff;--text:#111827;--text-muted:#4b5563;--text-dim:#6b7280;--accent:#4f46e5;--accent-hover:#4338ca;--accent-glow:rgba(79,70,229,.15);--border:#d1d5db;--border-subtle:#e5e7eb;--success:#059669;--thumb-gradient:linear-gradient(135deg,#c7d2fe,#a5b4fc)}[data-theme=midnight]{--bg:#050510;--bg-elevated:#0d0d1a;--surface:#141428;--surface-hover:#1c1c38;--text:#ececff;--text-muted:#a5a5c9;--text-dim:#7c7ca3;--accent:#a855f7;--accent-hover:#c084fc;--accent-glow:rgba(168,85,247,.25);--border:#2d2d52;--border-subtle:#1a1a33;--success:#22d3ee;--thumb-gradient:linear-gradient(135deg,#581c87,#312e81)}[data-theme=ocean]{--bg:#041018;--bg-elevated:#081820;--surface:#0c2430;--surface-hover:#123040;--text:#e6fffb;--text-muted:#94b8c8;--text-dim:#6b8f9f;--accent:#06b6d4;--accent-hover:#22d3ee;--accent-glow:rgba(6,182,212,.25);--border:#1e4050;--border-subtle:#143040;--success:#2dd4bf;--thumb-gradient:linear-gradient(135deg,#0e7490,#155e75)}:root{--radius:14px;--radius-sm:8px;--shadow:0 8px 32px rgba(0,0,0,.35);--card-width-feed:320px;--card-min-height:340px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}main{max-width:1440px;margin:0 auto;padding:0 28px 64px;min-height:calc(100vh - 140px)}.page{padding-top:32px}.page-header{margin-bottom:24px}.page-header h1{font-size:1.75rem;font-weight:700;letter-spacing:-.02em}.page-subtitle{color:var(--text-muted);margin-top:8px;font-size:.95rem}.header{background:color-mix(in srgb,var(--bg) 88%,transparent);border-bottom:1px solid var(--border-subtle);position:-webkit-sticky;position:sticky;top:0;z-index:100;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.header-inner{max-width:1440px;margin:0 auto;padding:14px 28px;justify-content:space-between}.header-inner,.logo{display:flex;align-items:center}.logo{gap:10px;font-size:1.15rem;font-weight:700;letter-spacing:-.02em}.logo__text{display:flex;flex-direction:column;gap:2px;line-height:1.2}.catalog-stats{display:flex;align-items:baseline;gap:6px;font-size:.72rem;font-weight:500;letter-spacing:0;color:var(--text-muted)}.catalog-stats__count{font-weight:700;color:var(--accent-hover)}.catalog-stats__label{color:var(--text-dim)}.logo__icon{color:var(--accent);font-size:.85rem}.header-nav{display:flex;gap:8px}.header-nav__link{padding:8px 14px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:500;color:var(--text-muted);transition:color .15s,background .15s}.header-nav__link.active,.header-nav__link:hover{color:var(--text);background:var(--surface)}.header-nav__link.active{color:var(--accent-hover)}.hero{position:relative;margin:28px 0 48px;padding:48px 40px;background:linear-gradient(135deg,#1a1a3e,#252560 40%,#181824);border:1px solid var(--border);border-radius:calc(var(--radius) + 4px);overflow:hidden;box-shadow:var(--shadow)}.hero__glow{position:absolute;top:-40%;right:-10%;width:50%;height:120%;background:radial-gradient(circle,var(--accent-glow) 0,transparent 70%);pointer-events:none}.hero-content{position:relative;z-index:1}.hero__badges{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:16px}.hero-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;font-weight:600;color:var(--accent-hover)}.hero h1{font-size:clamp(1.5rem,3vw,2.25rem);font-weight:700;line-height:1.25;letter-spacing:-.02em;max-width:900px;margin-bottom:12px}.hero-authors{color:var(--text-muted);font-size:.95rem;margin-bottom:16px}.hero-abstract{max-width:720px;line-height:1.65;color:#c4c4d0;font-size:.95rem;margin-bottom:28px;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.hero-actions{display:flex;flex-wrap:wrap;gap:12px}.feed-toolbar{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:8px;flex-wrap:wrap}.feed-toolbar__title{font-size:1.5rem;font-weight:700;letter-spacing:-.02em}.feed-toolbar__subtitle{color:var(--text-muted);font-size:.9rem;margin-top:4px}.feed-refresh-btn{flex-shrink:0;white-space:nowrap}.feed-refresh-btn:disabled{opacity:.6;cursor:not-allowed}.feed-row{margin-bottom:44px}.feed-row__header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:16px;padding-right:4px}.feed-row__header h2{font-size:1.2rem;font-weight:600;letter-spacing:-.01em}.feed-row__more{font-size:.85rem;color:var(--accent-hover);font-weight:500}.feed-row__more:hover{text-decoration:underline}.feed-toolbar__actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.feed-controls{display:flex;gap:10px;flex-wrap:wrap}.feed-controls__group{display:flex;flex-direction:column;gap:4px}.feed-controls__label{font-size:.72rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.04em}.feed-controls__select{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 10px;font-size:.85rem}.feed-row__hint{font-size:.78rem;color:var(--text-dim);margin-top:4px}.row-scroll-wrap{position:relative;display:flex;align-items:center;gap:8px}.row-scroll{display:flex;gap:18px;overflow-x:auto;overflow-y:hidden;flex:1 1;padding:4px 4px 16px;scroll-snap-type:x mandatory;scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:var(--accent) var(--border-subtle)}.row-scroll-btn{flex:0 0 36px;height:36px;border-radius:50%;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:1.4rem;line-height:1;cursor:pointer;transition:background .15s,border-color .15s}.row-scroll-btn:hover{background:var(--surface-hover);border-color:var(--accent)}.row-scroll::-webkit-scrollbar{height:8px}.row-scroll::-webkit-scrollbar-track{background:var(--border-subtle);border-radius:4px}.row-scroll::-webkit-scrollbar-thumb{background:var(--accent);border-radius:4px}.free-badge,.paper-card__free-badge{font-size:.68rem;font-weight:600;color:var(--success);border:1px solid color-mix(in srgb,var(--success) 40%,transparent);border-radius:999px;padding:2px 8px}.youtube-feed__section{margin-bottom:36px}.youtube-feed__title{font-size:1.15rem;margin-bottom:14px}.youtube-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));grid-gap:18px;gap:18px}.paper-card--youtube{flex:unset;min-height:unset;display:grid;grid-template-columns:168px 1fr;min-height:140px}.paper-card__thumb{background:var(--thumb-gradient);min-height:140px;position:relative;display:flex;align-items:flex-end;padding:10px}.paper-card__thumb-topic{font-size:.72rem;font-weight:600;color:hsla(0,0%,100%,.9)}.paper-card__free-badge{position:absolute;top:8px;right:8px;background:rgba(0,0,0,.45)}.paper-card--youtube .paper-card__link{padding:12px 14px 8px}.paper-card--youtube .paper-card__title{font-size:.95rem;-webkit-line-clamp:2}.paper-card--youtube .abstract{display:none}.paper-card--youtube .card-footer{grid-column:2;padding:0 14px 12px}@media (max-width:720px){.paper-card--youtube{grid-template-columns:1fr}.paper-card--youtube .card-footer{grid-column:1}.row-scroll-btn{display:none}}.paper-card{flex:0 0 var(--card-width-feed);min-height:var(--card-min-height);background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius);scroll-snap-align:start;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;display:flex;flex-direction:column;overflow:hidden}.paper-card--grid{flex:unset;min-height:320px}.paper-card:hover{transform:translateY(-3px);border-color:rgba(99,102,241,.45);box-shadow:0 12px 40px rgba(0,0,0,.4)}.paper-card__link{flex:1 1;display:flex;flex-direction:column;padding:18px 18px 12px;min-height:0}.paper-card__title{font-size:1rem;font-weight:600;line-height:1.35;letter-spacing:-.01em;margin:10px 0 6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.authors{font-size:.8rem;color:var(--text-muted);margin-bottom:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.abstract{flex:1 1;font-size:.84rem;color:#b8bcc8;line-height:1.55;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.abstract--muted{color:var(--text-dim);font-style:italic;-webkit-line-clamp:2}.card-top{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.source-badge{font-size:.68rem;font-weight:600;background:var(--accent);color:#fff;padding:3px 9px;border-radius:6px;text-transform:uppercase;letter-spacing:.04em}.citation-badge{font-size:.72rem;color:var(--text-muted);font-weight:500}.card-footer{justify-content:space-between;padding:12px 18px;border-top:1px solid var(--border-subtle);background:rgba(0,0,0,.15)}.card-footer,.card-footer__meta{display:flex;align-items:center;gap:8px}.card-footer__meta{flex-wrap:wrap;min-width:0}.topic-tag{font-size:.68rem;font-weight:500;padding:3px 8px;white-space:nowrap}.topic-tag,.venue-tag{background:var(--surface-hover);color:var(--text-muted);border-radius:6px}.venue-tag{font-size:.72rem;padding:3px 10px}.date{font-size:.72rem;color:var(--text-dim)}.save-btn{flex-shrink:0;background:transparent;border:1px solid var(--border);color:var(--text);padding:6px 12px;border-radius:var(--radius-sm);cursor:pointer;font-size:.75rem;font-weight:500;transition:background .15s,border-color .15s,color .15s}.save-btn:hover{border-color:var(--accent);color:var(--accent-hover)}.save-btn--saved{border-color:var(--success);color:var(--success);background:rgba(52,211,153,.08)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border-radius:var(--radius-sm);font-weight:600;font-size:.9rem;border:none;cursor:pointer;transition:background .15s,transform .1s}.btn:active{transform:scale(.98)}.btn.primary{background:var(--accent);color:#fff}.btn.primary:hover{background:var(--accent-hover)}.btn.secondary{background:hsla(0,0%,100%,.06);color:var(--text);border:1px solid var(--border)}.btn.secondary:hover{background:hsla(0,0%,100%,.1)}.paper-detail{max-width:820px}.paper-detail h1{font-size:clamp(1.4rem,3vw,2rem);font-weight:700;line-height:1.3;letter-spacing:-.02em;margin:16px 0 10px}.detail-header{gap:8px}.detail-header,.metrics{display:flex;flex-wrap:wrap}.metrics{gap:12px;color:var(--text-muted);margin:16px 0 24px;font-size:.88rem}.metric-pill{background:rgba(99,102,241,.15);color:var(--accent-hover);padding:2px 10px;border-radius:999px;font-size:.8rem}.abstract-section{background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:24px;margin-bottom:28px}.abstract-section h2{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:12px}.full-abstract{line-height:1.75;color:#d1d5db;font-size:.95rem}.detail-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:48px}.similar h2{font-size:1.15rem;margin-bottom:16px}.library-grid,.search-results,.similar-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));grid-gap:20px;gap:20px}.search-bar-wrap{position:relative;margin-bottom:24px}.search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-dim);font-size:1.1rem;pointer-events:none}.search-input{width:100%;padding:14px 18px 14px 44px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-size:1rem;transition:border-color .15s,box-shadow .15s}.search-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.results-count{font-size:.85rem}.results-count,.status-text{color:var(--text-muted);margin-bottom:16px}.onboarding-page{max-width:720px}.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));grid-gap:12px;gap:12px;margin:24px 0}.topic-btn{padding:16px;background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);color:var(--text);cursor:pointer;font-size:.88rem;font-weight:500;text-align:left;transition:border-color .15s,background .15s}.topic-btn:hover{border-color:rgba(99,102,241,.4)}.topic-btn.selected{border-color:var(--accent);background:rgba(99,102,241,.12);color:var(--accent-hover)}.role-select{margin-bottom:24px;color:var(--text-muted)}.role-select select{margin-left:12px;padding:8px 12px;background:var(--surface);border:1px solid var(--border);color:var(--text);border-radius:var(--radius-sm)}.site-footer{border-top:1px solid var(--border-subtle);padding:32px 28px;margin-top:48px}.site-footer__inner{max-width:1440px;margin:0 auto;text-align:center}.site-footer__brand{font-weight:600;color:var(--text-muted)}.site-footer__tagline{font-size:.85rem;color:var(--text-dim);margin-top:6px}.empty-state,.error-state,.loading{text-align:center;padding:64px 24px;color:var(--text-muted)}.empty-state h2,.error-state h2{color:var(--text);margin-bottom:8px}.error-state__hint{font-size:.85rem;margin-top:12px;color:var(--text-dim)}.empty-state--inline{padding:32px;background:var(--surface);border-radius:var(--radius);border:1px dashed var(--border)}@keyframes shimmer{0%{opacity:.5}50%{opacity:.85}to{opacity:.5}}.skeleton-block{background:var(--surface);border-radius:var(--radius);animation:shimmer 1.5s ease-in-out infinite}.skeleton-hero{height:280px;margin:28px 0 48px}.skeleton-title{height:24px;width:200px;margin-bottom:16px}.skeleton-card{flex:0 0 var(--card-width-feed);min-height:var(--card-min-height)}@media (max-width:640px){main{padding:0 16px 48px}.header-inner{padding:12px 16px;flex-direction:column;gap:12px;align-items:flex-start}.hero{padding:28px 20px}.paper-card{flex:0 0 85vw}}