:root{--primary-color:#0050a0;--primary-dark:#003e7e;--error-color:#dc3545;--success-color:#28a745;--background-color:#f4f4f4;--text-color:#333;--border-radius:4px}body{text-align:center;background-color:var(--background-color);color:var(--text-color);margin:0;padding:0;font-family:Arial,sans-serif;line-height:1.6}:focus{outline:3px solid var(--primary-color);outline-offset:2px}.skip-link{background-color:var(--primary-color);color:#fff;z-index:100;padding:8px;transition:top .3s;position:absolute;top:-40px;left:0}.skip-link:focus{top:0}.sr-only{clip:rect(0,0,0,0);border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}header{background-color:var(--primary-color);color:#fff;margin-bottom:2rem;padding:1rem;position:relative}h1{margin:0}.container{max-width:800px;margin:20px auto;padding:0 20px 80px}.signin-page{background:linear-gradient(135deg,#f4f4f4 0%,#e0e0e0 100%);justify-content:center;align-items:center;min-height:100vh;display:flex}.signin-container{width:90%;max-width:600px;padding:2rem}.signin-content{border-radius:var(--border-radius);text-align:center;background:#fff;padding:3rem;box-shadow:0 4px 6px #0000001a}.tagline{color:#fff;margin:1rem 0 2rem;font-size:1.2rem}.features{text-align:left;margin:2rem 0}.features ul{padding:0;list-style:none}.features li{color:#444;margin:1rem 0;font-size:1.1rem}.signin-box{border-radius:var(--border-radius);background:#f8f9fa;margin:2rem 0;padding:2rem}.signin-button{background-color:var(--primary-color);color:#fff;border-radius:var(--border-radius);cursor:pointer;border:none;justify-content:center;align-items:center;gap:10px;width:100%;max-width:300px;margin:1.5rem auto 0;padding:12px 24px;font-size:1.1rem;transition:transform .2s,background-color .2s;display:flex}.signin-button:hover{background-color:var(--primary-dark);transform:translateY(-2px)}.google-icon{width:24px;height:24px}.biometric-button{color:#fff;background-color:#007525;margin-top:1rem;padding-left:2.5rem;font-weight:700;display:none;position:relative}.biometric-button:hover{background-color:#005d1e}.fingerprint-icon{font-size:1.2rem;position:absolute;left:1rem}.biometric-button:focus{outline-offset:2px;outline:3px solid #fff;box-shadow:0 0 0 3px #00752580}.signin-footer{color:#666;margin-top:2rem}.privacy-note{color:#000;font-size:.9rem}.form-group{text-align:left;margin-bottom:1.5rem}label{color:var(--text-color);margin-bottom:.5rem;font-weight:500;display:block}input[type=text],select,textarea{border-radius:var(--border-radius);box-sizing:border-box;border:1px solid #ccc;width:100%;min-height:44px;margin:8px 0;padding:10px;font-size:1rem}textarea{resize:vertical;height:100px}button{background-color:var(--primary-color);color:#fff;border-radius:var(--border-radius);cursor:pointer;border:none;min-height:44px;padding:10px 20px;font-size:1rem;transition:background-color .3s}button:hover:not(:disabled){background-color:var(--primary-dark)}button:disabled{opacity:.7;cursor:not-allowed}#signoutbttn{background-color:var(--error-color);z-index:10;min-height:36px;padding:8px 16px;font-size:.9rem;position:absolute;top:1rem;right:1rem}#signoutbttn:hover{background-color:#c82333}.filters{justify-content:center;gap:1rem;margin-bottom:2rem;display:flex}.books-list{margin-top:2rem}.book-item{border-radius:var(--border-radius);text-align:left;background:#fff;margin:1rem 0;padding:1.5rem;position:relative;box-shadow:0 2px 4px #0000001a}.book-item h3{color:var(--primary-color);margin:0 0 1rem}.book-item p{margin:.5rem 0}.book-actions{gap:10px;margin-top:1rem;display:flex}.edit-btn,.delete-btn{flex:1;margin:0;padding:8px 10px;font-size:.9rem;position:static}.delete-btn{background-color:var(--error-color)}.delete-btn:hover{background-color:#c82333}.edit-btn{background-color:var(--primary-color)}.edit-btn:hover{background-color:var(--primary-dark)}@media (width>=768px){.book-actions{gap:10px;margin-top:0;display:flex;position:absolute;top:1rem;right:1rem}.edit-btn,.delete-btn{flex:none;min-width:60px}}.error{border-color:var(--error-color);background-color:#fff8f8}.error-message{color:var(--error-color);border-radius:var(--border-radius);background-color:#f8d7da;margin-top:.25rem;margin-bottom:.5rem;padding:.5rem;font-size:.875rem;display:block}.success-message{color:var(--success-color);border-radius:var(--border-radius);background-color:#d4edda;border:1px solid #c3e6cb;margin-bottom:1rem;padding:.75rem 1.25rem}.loading-spinner{vertical-align:middle;border:2px solid #fff;border-top-color:#0000;border-radius:50%;width:1rem;height:1rem;margin-right:.5rem;animation:1s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}#chatbot-container{border-radius:var(--border-radius);z-index:1000;background:#fff;border:1px solid #ccc;width:300px;padding:15px;transition:transform .3s;position:fixed;bottom:20px;right:20px;box-shadow:0 2px 8px #0000001a}#chatbot-container.minimized{transform:translateY(calc(100% + 20px))}.minimize-btn{color:#666;cursor:pointer;border:none;justify-content:center;align-items:center;min-height:30px;padding:5px 10px;font-size:1.2rem;display:flex;position:absolute;top:10px;right:10px;background:0 0!important}.minimize-btn:hover{color:#333;background:0 0!important}.chat-toggle-btn{background-color:var(--primary-color);color:#fff;border-radius:var(--border-radius);cursor:pointer;z-index:1000;border:none;padding:10px 20px;display:none;position:fixed;bottom:20px;right:20px;box-shadow:0 2px 8px #0003}.chat-toggle-btn.visible{display:block}.chat-toggle-btn:hover{background-color:var(--primary-dark)}#chat-history{border-bottom:1px solid #eee;height:300px;margin-top:30px;margin-bottom:15px;padding:10px;overflow-y:auto}.chat-input-group{gap:8px;display:flex}#chat-input{flex-grow:1;min-height:44px}.history{border-radius:var(--border-radius);background-color:#f8f9fa;margin-bottom:8px;padding:8px}.history:nth-child(odd){background-color:#e9ecef}.rating{color:#000;letter-spacing:2px}@media (width<=768px){.container{padding:0 10px 100px}.filters{flex-direction:column;align-items:stretch}select{width:100%}#chatbot-container{border-radius:var(--border-radius)var(--border-radius)0 0;box-sizing:border-box;width:100%;padding:10px;bottom:0;left:0;right:0}#chat-history{height:200px;margin-top:25px}.chat-toggle-btn{border-radius:0;width:100%;min-height:40px;padding:8px 16px;font-size:.9rem;bottom:0;right:0}.minimize-btn{min-height:25px;padding:3px 8px;top:5px;right:5px}.signin-container{padding:1rem}.signin-content{padding:1.5rem}h1{font-size:1.5rem}.book-item{padding:1rem}input,select,textarea,button{font-size:16px}#signoutbttn{padding:6px 12px;font-size:.8rem;top:.5rem;right:.5rem}}@media (prefers-contrast:high){:root{--primary-color:#00e;--background-color:white;--text-color:black}.book-item{border:2px solid}.error{border:2px solid var(--error-color)}.success-message{border:2px solid var(--success-color)}}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}@media print{.no-print{display:none}body{background:#fff}.book-item{break-inside:avoid;border:1px solid #000;margin:1rem 0}}.modal{z-index:1100;background-color:#00000080;justify-content:center;align-items:center;width:100%;height:100%;padding:20px;display:none;position:fixed;top:0;left:0;overflow-y:auto}.modal.visible{display:flex}.modal-content{border-radius:var(--border-radius);background-color:#fff;flex-direction:column;width:90%;max-width:600px;max-height:90vh;padding:0;display:flex;overflow-y:auto;box-shadow:0 4px 8px #0003}.modal-header{background-color:var(--primary-color);color:#fff;border-radius:var(--border-radius)var(--border-radius)0 0;justify-content:space-between;align-items:center;padding:1rem;display:flex}.modal-header h2{margin:0;font-size:1.5rem}.modal-body{flex-grow:1;padding:1.5rem;overflow-y:auto}.modal-footer{border-top:1px solid #eee;justify-content:flex-end;gap:1rem;padding:1rem;display:flex}.close-modal{color:#fff;cursor:pointer;background:0 0;border:none;min-height:30px;padding:0 10px;font-size:1.5rem}.close-modal:hover{background:#ffffff1a}.cancel-edit-btn{background-color:#6c757d}.cancel-edit-btn:hover{background-color:#5a6268}@media (width<=768px){.modal-content{width:95%}.modal-footer{flex-direction:column}.modal-footer button{width:100%}}
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