:root{--bg: #0f1420;--surface: #1b2233;--surface-2: #232c40;--border: #2e3950;--text: #e6e9f0;--muted: #9aa3b8;--accent: #6366f1;--accent-2: #4f46e5;--green: #16a34a;--amber: #d97706;--gray: #64748b;--danger: #dc2626}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.brand{font-weight:700;font-size:18px;color:var(--text);text-decoration:none}.topbar nav{display:flex;gap:14px;align-items:center}.topbar nav a{color:var(--muted);text-decoration:none}.topbar nav a.active{color:var(--text)}.content{max-width:1000px;margin:0 auto;padding:24px 20px 60px}.btn{display:inline-block;padding:9px 14px;border-radius:8px;border:1px solid var(--border);background:var(--surface-2);color:var(--text);cursor:pointer;font-size:14px;text-decoration:none}.btn:hover{border-color:var(--accent)}.btn.primary{background:var(--accent);border-color:var(--accent)}.btn.primary:hover{background:var(--accent-2)}.btn.secondary{background:transparent}.btn.danger{background:transparent;color:var(--danger);border-color:var(--danger)}.btn:disabled{opacity:.6;cursor:default}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:20px}.card h2{margin-top:0;font-size:16px}.hint,.msg,.error{font-size:13px}.hint{color:var(--muted)}.error{color:#fca5a5}.msg{color:#a5b4fc}label{display:block;font-size:13px;color:var(--muted);margin-bottom:12px}input,select,textarea{width:100%;margin-top:4px;padding:9px 10px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:14px}.row{display:flex;gap:14px}.row>label{flex:1}.scanner{margin:10px 0}.video-wrap{position:relative;margin-top:12px;max-width:420px;border-radius:12px;overflow:hidden}.scanner-video{width:100%;display:block;background:#000}.scan-line{position:absolute;left:0;right:0;top:50%;height:2px;background:var(--accent);box-shadow:0 0 8px var(--accent)}.isbn-manual{display:flex;gap:10px;margin-top:12px}.isbn-manual input{flex:1}.add-book .grid{display:flex;gap:18px}.add-book .fields{flex:1}.cover-preview{width:140px;height:auto;border-radius:8px;border:1px solid var(--border)}.filters{display:flex;gap:10px;margin-bottom:20px}.filters input{flex:1}.filters select{width:auto}.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px}.book-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden;text-decoration:none;color:var(--text)}.book-card:hover{border-color:var(--accent)}.book-card .cover{position:relative;aspect-ratio:2/3;background:var(--surface-2)}.book-card .cover img{width:100%;height:100%;object-fit:cover}.no-cover{display:flex;align-items:center;justify-content:center;height:100%;color:var(--muted);font-size:12px}.book-card .info{padding:10px;display:flex;flex-direction:column;gap:2px}.book-card .info strong{font-size:14px;line-height:1.2}.book-card .autor{font-size:12px;color:var(--muted)}.book-card .precio{font-size:13px;color:var(--green);font-weight:600;margin-top:4px}.badge{position:absolute;top:8px;left:8px;font-size:11px;padding:3px 7px;border-radius:6px;color:#fff}.badge.archivado{background:var(--gray)}.badge.disponible{background:var(--amber)}.badge.en_venta{background:var(--green)}.empty{text-align:center;padding:40px;color:var(--muted);display:flex;flex-direction:column;gap:14px;align-items:center}.back{color:var(--muted);text-decoration:none;display:inline-block;margin-bottom:16px}.detail-grid{display:flex;gap:28px}.cover-col{position:relative;flex-shrink:0;width:200px}.cover-col img{width:100%;border-radius:10px;border:1px solid var(--border)}.meta-col{flex:1}.meta-col h1{margin:0 0 4px}.meta-col .autor{color:var(--muted);margin-top:0}dl{display:grid;grid-template-columns:120px 1fr;gap:4px 10px;font-size:14px}dt{color:var(--muted)}.resena{font-size:14px;line-height:1.5;color:#cbd2e0}.edit-box{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px;margin-top:20px}.edit-box h3{margin-top:0}.actions{display:flex;gap:12px;margin-top:8px}.store-hero{margin-bottom:20px}.store-hero h1{margin:0 0 4px}.store-hero p{color:var(--muted);margin:0}.precio-grande{font-size:26px;font-weight:700;color:var(--green);margin:8px 0 16px}.store-item .actions{margin:16px 0 8px}@media(max-width:640px){.detail-grid{flex-direction:column}.cover-col{width:160px}.add-book .grid{flex-direction:column}.row{flex-direction:column;gap:0}}