:root{--bg-primary:#f8f6f0;--bg-card:#fff;--bg-appbar:#1a3a3a;--text-primary:#1e2a2a;--text-secondary:#5a6b6b;--border-color:#e2ddd4;--shadow:0 2px 8px #0000000f;--shadow-hover:0 8px 24px #0000001f;--primary-color:#2a9d8f;--accent-color:#e76f51;--gold-color:#f4a261;--danger-color:#c0392b;--success-color:#2a9d8f;--border-radius:12px;--modal-overlay:#1a3a3ab3}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-primary);color:var(--text-primary);flex-direction:column;height:100vh;font-family:Inter,system-ui,-apple-system,sans-serif;display:flex}.material-icons{-webkit-font-feature-settings:"liga";-webkit-font-smoothing:antialiased;font-weight:400;line-height:1;display:inline-block;font-family:Material Icons!important;font-size:1.2rem!important}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.topbar{background:var(--bg-appbar);border-bottom:1px solid var(--border-color);flex-wrap:wrap;flex-shrink:0;justify-content:space-between;align-items:center;gap:12px;height:64px;padding:0 24px;display:flex;box-shadow:0 2px 8px #00000014}.topbar-left{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.topbar-right{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.topbar .logo{color:var(--gold-color);align-items:center;gap:8px;font-size:1.3rem;font-weight:600;display:flex}.nav-links{flex-wrap:wrap;align-items:center;gap:8px;margin-left:20px;display:flex}.nav-link{color:var(--gold-color);cursor:pointer;border-radius:40px;align-items:center;gap:4px;padding:6px 16px;font-size:.9rem;font-weight:500;text-decoration:none;transition:background .2s,color .2s;display:inline-flex}.nav-link:hover{color:#fff;background:#f4a26133}.nav-link .material-icons{font-size:1.1rem!important}.topbar-right button{cursor:pointer;border:none;border-radius:40px;justify-content:center;align-items:center;gap:6px;padding:8px 20px;font-family:inherit;font-size:.9rem;font-weight:500;transition:all .2s;display:inline-flex}.topbar-right .add-book-btn{background:var(--accent-color);color:#fff}.topbar-right .add-book-btn:hover{background:#d65a3e;transform:translateY(-2px);box-shadow:0 4px 12px #e76f514d}.topbar-right .logout-btn{background:var(--danger-color);color:#fff;border-radius:40px}.topbar-right .logout-btn:hover{background:#a93226}#header-seed{background:var(--gold-color);cursor:pointer;border:none;border-radius:8px;align-items:center;gap:6px;padding:8px 16px;font-size:.9rem;font-weight:600;transition:transform .2s,box-shadow .2s;display:inline-flex;color:#1a3a3a!important}#header-seed:hover{transform:scale(1.05);box-shadow:0 4px 12px #f4a2614d}#header-seed .material-icons{font-size:1.2rem!important}@media (width<=700px){.topbar{gap:8px;height:auto;padding:12px 16px}.topbar-left{flex:100%;order:1;justify-content:flex-start;gap:4px}.topbar-right{flex-wrap:wrap;flex:100%;order:2;justify-content:flex-end;gap:4px}.nav-links{justify-content:flex-start;gap:4px;width:100%;margin-left:0}.nav-link{padding:4px 10px;font-size:.8rem}#header-seed{padding:6px 12px;font-size:.8rem}.topbar .logo{font-size:1.1rem}.topbar-right button{padding:4px 12px;font-size:.8rem}}#app{background:var(--bg-primary);flex:1;width:100%;max-width:1200px;margin:0 auto;padding:24px;overflow-y:auto}.controls{flex-wrap:wrap;justify-content:center;gap:1rem;margin-bottom:24px;display:flex}.controls input{border:2px solid var(--border-color);background:var(--bg-card);min-width:200px;max-width:500px;color:var(--text-primary);border-radius:40px;outline:none;flex:1;padding:12px 18px;font-size:1rem;transition:all .2s}.controls input:focus{border-color:var(--primary-color);box-shadow:0 0 0 4px #2a9d8f26}.book-grid{grid-template-columns:repeat(auto-fill,minmax(170px,1fr));justify-content:center;gap:20px;display:grid}@media (width<=480px){.book-grid{gap:12px;grid-template-columns:repeat(2,1fr)!important}}.book-card{background:var(--bg-card);border-radius:var(--border-radius);box-shadow:var(--shadow);cursor:pointer;border:1px solid var(--border-color);color:inherit;flex-direction:column;text-decoration:none;transition:transform .2s,box-shadow .2s;display:flex;overflow:hidden}.book-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-6px)}.book-card .image-wrapper{aspect-ratio:3/4;background:#e8e2d8;justify-content:center;align-items:center;width:100%;display:flex;position:relative;overflow:hidden}.book-card img{object-fit:cover;width:100%;height:100%;transition:transform .4s}.book-card:hover img{transform:scale(1.06)}.book-actions.overlay{pointer-events:none;flex-wrap:wrap;justify-content:center;gap:6px;padding:8px;display:flex;position:absolute;bottom:12px;left:12px;right:12px}.book-actions.overlay button{pointer-events:auto;cursor:pointer;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);color:#fff;background:#1a3a3ad9;border:none;border-radius:20px;justify-content:center;align-items:center;gap:4px;padding:6px 12px;font-size:.8rem;font-weight:500;transition:all .2s;display:flex}.book-actions.overlay button:hover{background:#1a3a3a;transform:scale(1.05)}.book-actions.overlay .edit-btn{background:#2a9d8fe6}.book-actions.overlay .edit-btn:hover{background:#2a9d8f}.book-actions.overlay .delete-btn{background:#c0392be6}.book-actions.overlay .delete-btn:hover{background:#c0392b}.book-card-content{flex-direction:column;flex:1;padding:12px 14px 14px;display:flex}.book-card-content h3{color:var(--text-primary);-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0 0 4px;font-size:1rem;font-weight:600;line-height:1.4;display:-webkit-box;overflow:hidden}.book-card-content .author{color:var(--text-secondary);font-size:.85rem}.modal-overlay{background:var(--modal-overlay);z-index:1000;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);justify-content:center;align-items:center;width:100%;height:100%;animation:.2s fadeIn;display:flex;position:fixed;top:0;left:0}.modal-content{background:var(--bg-card);border-radius:var(--border-radius);width:92%;max-width:500px;max-height:90vh;padding:32px;animation:.3s slideUp;position:relative;overflow-y:auto;box-shadow:0 24px 48px #0003}.modal-close{cursor:pointer;color:var(--text-secondary);background:#0000000d;border:none;border-radius:50%;padding:6px;transition:background .2s;position:absolute;top:12px;right:12px}.modal-close:hover{background:#0000001a}.modal-image-wrapper{background:var(--bg-primary);border-radius:var(--border-radius);justify-content:center;align-items:center;width:100%;max-height:280px;margin-bottom:16px;padding:12px;display:flex}.modal-image-wrapper img{object-fit:contain;border-radius:var(--border-radius);max-width:100%;max-height:280px}.modal-content h2{color:var(--text-primary);margin:0 0 4px;font-size:1.5rem}.modal-content .author{color:var(--text-secondary);margin-bottom:8px;font-size:1rem}.modal-content .description{color:var(--text-secondary);margin:12px 0;line-height:1.6}.modal-content .actions{flex-wrap:wrap;gap:12px;margin-top:16px;display:flex}.modal-content .actions button{border-radius:var(--border-radius);cursor:pointer;color:#fff;background:#ccc;border:none;padding:8px 20px;font-weight:500}.modal-content .actions button:disabled{opacity:.5;cursor:not-allowed}#login-overlay .modal-content,#payment-overlay .modal-content{max-width:420px;padding:24px}#login-overlay input,#payment-overlay input{border:1px solid var(--border-color);background:var(--bg-primary);width:100%;color:var(--text-primary);border-radius:8px;outline:none;padding:10px 14px;font-size:1rem;transition:border-color .2s}#login-overlay input:focus,#payment-overlay input:focus{border-color:var(--primary-color)}#login-overlay label,#payment-overlay label{color:var(--text-primary);margin-bottom:6px;font-weight:500;display:block}#login-overlay .modal-close,#payment-overlay .modal-close{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;border-radius:50%;padding:4px;transition:background .2s;position:absolute;top:12px;right:12px}#login-overlay .modal-close:hover,#payment-overlay .modal-close:hover{background:#0000000d}#login-overlay button[type=submit],#payment-overlay button[type=submit]{background:var(--accent-color);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:12px;font-size:1rem;font-weight:600;transition:background .2s}#login-overlay button[type=submit]:hover,#payment-overlay button[type=submit]:hover{background:#d65a3e}#login-overlay #login-error,#payment-overlay #payment-status{color:var(--danger-color);margin-top:8px;font-size:.9rem}#edit-form label{color:var(--text-primary);margin-bottom:6px;font-weight:500;display:block}#edit-form input,#edit-form textarea{border:2px solid var(--border-color);background:var(--bg-primary);width:100%;color:var(--text-primary);border-radius:10px;outline:none;padding:10px 14px;font-family:inherit;font-size:1rem;transition:border-color .2s}#edit-form input:focus,#edit-form textarea:focus{border-color:var(--primary-color)}#edit-form textarea{resize:vertical}#edit-form button[type=submit]{background:var(--accent-color);color:#fff;cursor:pointer;border:none;border-radius:40px;padding:10px 24px;font-weight:600;transition:background .2s}#edit-form button[type=submit]:hover{background:#d65a3e}#cancel-btn{border:2px solid var(--border-color);color:var(--text-primary);cursor:pointer;background:0 0;border-radius:40px;padding:10px 24px;transition:background .2s}#cancel-btn:hover{background:var(--bg-primary)}#global-loader{z-index:9999;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#0009;flex-direction:column;justify-content:center;align-items:center;gap:16px;width:100%;height:100%;display:none;position:fixed;top:0;left:0}#global-loader .material-icons{color:#fff;font-size:3rem;animation:1s linear infinite spin}#global-loader .loader-text{color:#fff;font-size:1.1rem;font-weight:500}.transactions-table{border-collapse:collapse;width:100%;font-size:.95rem}.transactions-table th{text-align:left;background:var(--bg-primary);border-bottom:2px solid var(--border-color);padding:12px 8px}.transactions-table td{border-bottom:1px solid var(--border-color);padding:12px 8px}.transactions-table .status-badge{color:#fff;background:#2e7d32;border-radius:12px;padding:2px 12px;font-size:.8rem}@media (width<=600px){.transactions-table thead{display:none}.transactions-table tbody tr{border:1px solid var(--border-color);background:var(--bg-card);border-radius:8px;margin-bottom:12px;padding:8px;display:block}.transactions-table tbody td{border-bottom:1px solid var(--border-color);justify-content:space-between;display:flex;padding:6px 0!important}.transactions-table tbody td:last-child{border-bottom:none}.transactions-table tbody td:before{content:attr(data-label);color:var(--text-secondary);font-size:.8rem;font-weight:500}}#payment-form input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #2a9d8f26}#payment-form button:hover{transform:translateY(-2px)}#payment-form #pay-now-btn:hover{box-shadow:0 4px 12px #e76f514d}#payment-form #pay-cancel-btn:hover{background:var(--bg-primary)}@media (width<=600px){#payment-form div[style*="grid-template-columns: 1fr 1fr;"]{grid-template-columns:1fr!important}}