:root{--text:#4b4555;--text-h:#08060d;--bg:#fff;--surface:#faf9fc;--border:#e5e4e7;--accent:#7c3aed;--accent-bg:#7c3aed14;--accent-border:#7c3aed59;--danger:#b91c1c;--danger-bg:#b91c1c14;--sans:system-ui, "Segoe UI", Roboto, sans-serif;font:16px/1.5 var(--sans);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--text:#b7b2c0;--text-h:#f3f4f6;--bg:#131319;--surface:#1a1a22;--border:#2e2e38;--accent:#a78bfa;--accent-bg:#a78bfa1f;--accent-border:#a78bfa66;--danger:#f87171;--danger-bg:#f871711f}}*{box-sizing:border-box}body{margin:0}h1,h2,h3{color:var(--text-h);margin:0;font-weight:600}a{color:var(--accent)}.app{flex-direction:column;min-height:100svh;display:flex}.site-header{z-index:10;background:var(--bg);border-bottom:1px solid var(--border);position:sticky;top:0}.site-header-inner{justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:14px 20px;display:flex}.brand{align-items:center;gap:10px;text-decoration:none;display:flex}.brand-mark{border-radius:8px;display:block}.brand-name{color:var(--text-h);letter-spacing:-.3px;font-size:18px;font-weight:700}.nav-cta{font:inherit;background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:999px;padding:10px 18px;font-weight:600}.nav-cta:hover{opacity:.9}.hero{color:#fff;background:linear-gradient(135deg,#7c3aed 0%,#4c1d95 100%);padding:72px 20px}.hero-content{text-align:center;max-width:720px;margin:0 auto}.hero-eyebrow{text-transform:uppercase;letter-spacing:1.5px;color:#ffffffbf;margin:0 0 12px;font-size:12px;font-weight:700}.hero h1{color:#fff;letter-spacing:-1px;margin:0;font-size:44px;line-height:1.1}.hero-subtitle{color:#ffffffd9;margin:18px 0 0;font-size:17px;line-height:1.6}.hero-chips{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:28px;display:flex}.hero-chip{font:inherit;color:#fff;cursor:pointer;background:#ffffff14;border:1px solid #ffffff59;border-radius:999px;padding:9px 18px;font-size:14px;font-weight:600}.hero-chip:hover{background:#fff3;border-color:#fff9}.catalogue{flex:1;width:100%;max-width:1100px;margin:0 auto;padding:40px 20px 64px;scroll-margin-top:70px}.site-footer{text-align:center;color:var(--text);border-top:1px solid var(--border);padding:24px 20px;font-size:13px}.filter-bar{background:var(--surface);border:1px solid var(--border);border-radius:12px;flex-wrap:wrap;align-items:end;gap:12px;margin-bottom:24px;padding:16px;display:flex}.filter-field{color:var(--text);flex-direction:column;flex:140px;gap:4px;min-width:140px;font-size:13px;display:flex}.filter-field select,.filter-field input{font:inherit;border:1px solid var(--border);background:var(--bg);color:var(--text-h);border-radius:8px;padding:8px 10px}.filter-field select:focus,.filter-field input:focus{outline:2px solid var(--accent-border);outline-offset:1px}.clear-filters{border:1px solid var(--border);background:var(--bg);height:fit-content;color:var(--text);cursor:pointer;font:inherit;border-radius:8px;padding:8px 14px}.clear-filters:hover{border-color:var(--accent-border);color:var(--accent)}.paper-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;display:grid}.paper-card{border:1px solid var(--border);background:var(--surface);border-radius:12px;flex-direction:column;gap:8px;padding:16px;display:flex}.paper-card-header{justify-content:space-between;align-items:baseline;gap:8px;display:flex}.paper-card-header h3{font-size:16px}.subject-code{color:var(--text);white-space:nowrap;font-size:12px}.paper-meta{color:var(--text);margin:0;font-size:14px}.paper-tags{flex-wrap:wrap;gap:6px;display:flex}.tag{background:var(--accent-bg);color:var(--accent);border:1px solid var(--accent-border);border-radius:999px;padding:3px 9px;font-size:12px}.tag-muted{color:var(--text);border-color:var(--border);background:0 0}.open-pdf{background:var(--accent);color:#fff;border-radius:8px;align-self:flex-start;margin-top:auto;padding:8px 14px;font-size:14px;font-weight:600;text-decoration:none}.open-pdf:hover{opacity:.9}.state-message{text-align:center;color:var(--text);border:1px dashed var(--border);border-radius:12px;padding:48px 16px}.state-error{color:var(--danger);background:var(--danger-bg);border-color:var(--danger);flex-direction:column;align-items:center;gap:12px;display:flex}.state-error button{font:inherit;border:1px solid var(--danger);color:var(--danger);cursor:pointer;background:0 0;border-radius:8px;padding:8px 16px}.pagination{color:var(--text);justify-content:center;align-items:center;gap:16px;margin-top:28px;font-size:14px;display:flex}.pagination button{font:inherit;border:1px solid var(--border);background:var(--bg);color:var(--text-h);cursor:pointer;border-radius:8px;padding:8px 16px}.pagination button:disabled{opacity:.4;cursor:not-allowed}.pagination button:not(:disabled):hover{border-color:var(--accent-border);color:var(--accent)}