:root{--bg: #f8fafc;--panel: #ffffff;--muted: #64748b;--text: #1e293b;--brand: #3b82f6;--brand-2: #8b5cf6;--brand-success: #10b981;--brand-warning: #f59e0b;--brand-danger: #ef4444;--border: #e2e8f0;--accent: #06b6d4;--gold: #eab308}html,body{height:100%}body{margin:0;background:linear-gradient(160deg,var(--bg),#e0f2fe,#fef3e2);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Helvetica,Arial}.container{max-width:1080px;margin:0 auto;padding:24px}.global-nav{display:flex;justify-content:space-between;align-items:center;padding:16px 0;margin-bottom:24px;border-bottom:1px solid var(--border)}.nav-brand{font-size:1.5em;font-weight:700;color:var(--brand)}.nav-brand-link{text-decoration:none;color:var(--brand);transition:color .2s ease}.nav-brand-link:hover{color:var(--brand-2)}.nav-links{display:flex;gap:16px}.nav-btn{padding:8px 16px;background:transparent;border:1px solid var(--border);color:var(--text);border-radius:6px;cursor:pointer;transition:all .2s ease}.nav-btn:hover{background:var(--brand);border-color:var(--brand);transform:translateY(-1px)}.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:16px;box-shadow:0 4px 6px #0000000d;transition:transform .2s ease,box-shadow .2s ease}.card:hover{transform:translateY(-2px);box-shadow:0 8px 25px #0000001a}.card.clickable{cursor:pointer}.grid{display:grid;gap:16px}.grid.cols-auto{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.grid.cols-recs{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;cursor:pointer;color:#0c1022;background:linear-gradient(135deg,var(--brand),var(--brand-2));border-radius:10px;padding:8px 14px;font-weight:600;transition:transform .06s ease}.btn:active{transform:translateY(1px)}.add-to-cart-btn{background:#ff9500!important;color:#fff!important;border:2px solid #ff9500!important;border-radius:8px;padding:10px 16px;font-weight:600;font-size:14px;transition:all .2s ease}.add-to-cart-btn:hover{background:#e6860a!important;border-color:#e6860a!important;transform:translateY(-1px);box-shadow:0 4px 12px #ff95004d}.add-to-cart-btn:active{transform:translateY(0)}.btn.secondary{background:transparent;color:var(--text);border:1px solid var(--border)}.muted{color:var(--muted)}.row{display:flex;gap:12px;align-items:center}.space{height:12px}.nav{display:flex;gap:10px;align-items:center}.nav a{color:var(--text);text-decoration:none;opacity:.8}.nav a:hover{opacity:1}img.cover{width:100%;height:180px;object-fit:cover;border-radius:8px}table{border-collapse:collapse;width:100%}th,td{padding:8px;border-bottom:1px solid var(--border)}.banner{background:linear-gradient(135deg,var(--brand),var(--brand-2),var(--accent));color:#fff;padding:20px;text-align:center;margin-bottom:24px;border-radius:12px;box-shadow:0 8px 32px #6ea8fe4d}.banner h1{margin:0 0 8px;font-size:2.5em;font-weight:700;text-shadow:0 2px 4px rgba(0,0,0,.3)}.banner p{margin:0;font-size:1.2em;opacity:.9}.search-container{display:flex;gap:8px;margin:16px 0;align-items:center}.search-input{flex:1;padding:12px 16px;border:2px solid var(--border);border-radius:8px;background:var(--panel);color:var(--text);font-size:16px;transition:border-color .2s ease}.search-input:focus{outline:none;border-color:var(--brand)}.search-btn{padding:12px 20px;background:linear-gradient(135deg,var(--brand),var(--brand-2));border:none;border-radius:8px;color:#fff;font-weight:600;cursor:pointer;transition:transform .1s ease}.search-btn:hover{transform:translateY(-1px)}.rating{display:flex;align-items:center;gap:4px;margin:4px 0}.star{color:var(--gold);font-size:14px}.star.empty{color:var(--muted)}.price{font-size:18px;font-weight:700;color:var(--brand);margin:8px 0}.cart-btn{position:fixed;top:20px;right:20px;background:var(--accent);color:#fff;border:none;border-radius:50px;padding:12px 20px;font-weight:600;cursor:pointer;box-shadow:0 4px 12px #ff6b6b4d;z-index:1000;transition:transform .2s ease}.cart-btn:hover{transform:scale(1.05)}.scroll-container{scroll-behavior:smooth}.btn.remove{background:linear-gradient(135deg,var(--brand-danger),#dc3545);color:#fff}.btn.remove:hover{background:linear-gradient(135deg,#c82333,#bd2130)}.book-card{position:relative;overflow:hidden}.book-card .cover{transition:transform .3s ease}.book-card:hover .cover{transform:scale(1.05)}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.loading{animation:pulse 1.5s ease-in-out infinite}.auth-status{display:flex;align-items:center;gap:12px}.auth-status.authenticated{display:flex;align-items:center;gap:16px}.user-info{display:flex;align-items:center;gap:8px}.user-avatar img{width:32px;height:32px;border-radius:50%;object-fit:cover}.avatar-placeholder{width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}.user-details{display:flex;flex-direction:column;align-items:flex-start}.user-name{font-weight:600;font-size:14px;color:var(--text)}.user-email{font-size:12px;color:var(--muted)}.auth-button{padding:8px 16px;border:1px solid var(--border);border-radius:6px;background:var(--panel);color:var(--text);font-size:14px;cursor:pointer;transition:all .2s}.auth-button:hover{background:var(--brand);color:#fff;border-color:var(--brand)}.auth-button.logout{background:transparent;color:var(--muted)}.auth-button.logout:hover{background:var(--brand-danger);color:#fff;border-color:var(--brand-danger)}.login-container{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px;background:linear-gradient(160deg,var(--bg),#e0f2fe,#fef3e2)}.login-card{background:var(--panel);border-radius:12px;box-shadow:0 10px 25px #0000001a;padding:48px;max-width:400px;width:100%;text-align:center}.login-header h1{margin:0 0 8px;color:var(--text);font-size:24px}.login-header p{margin:0 0 32px;color:var(--muted);font-size:16px}.login-button{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;padding:16px 24px;background:var(--brand);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s;margin-bottom:16px}.login-button:hover{background:color-mix(in srgb,var(--brand) 90%,black);transform:translateY(-1px);box-shadow:0 4px 12px #3b82f64d}.login-icon{width:20px;height:20px}.login-info{padding-top:16px;border-top:1px solid var(--border)}.login-info p{margin:0;font-size:14px;color:var(--muted)}.callback-container{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px;background:linear-gradient(160deg,var(--bg),#e0f2fe,#fef3e2)}.callback-card{background:var(--panel);border-radius:12px;box-shadow:0 10px 25px #0000001a;padding:48px;max-width:400px;width:100%;text-align:center}.loading-spinner{width:40px;height:40px;border:4px solid var(--border);border-top:4px solid var(--brand);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 24px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.callback-card h2{margin:0 0 8px;color:var(--text);font-size:20px}.callback-card p{margin:0;color:var(--muted);font-size:16px}.error-toast{position:fixed;top:20px;right:20px;background:var(--brand-danger);color:#fff;padding:16px 20px;border-radius:8px;box-shadow:0 4px 12px #00000026;z-index:1000;transform:translate(400px);transition:transform .3s ease;max-width:300px}.error-toast.show{transform:translate(0)}.auth-required{display:flex;align-items:center;justify-content:center;min-height:60vh;padding:24px}.auth-card{background:var(--panel);border-radius:12px;box-shadow:0 10px 25px #0000001a;padding:48px;max-width:400px;width:100%;text-align:center;border:2px solid var(--border)}.auth-card h2{margin:0 0 16px;color:var(--text);font-size:24px}.auth-card p{margin:0 0 24px;color:var(--muted);font-size:16px}