body{font-family:sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}button,input,select,textarea{font:inherit;color:inherit;line-height:inherit}button{cursor:pointer;background:0 0;border:none}img{max-width:100%;display:block}a{color:inherit}body{color:#333;background:#f5f5f5;font-family:system-ui,-apple-system,sans-serif;line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:0 20px}header{color:#fff;background:#2c3e50;padding:1rem 0;box-shadow:0 2px 4px #0000001a}header .container{justify-content:space-between;align-items:center;display:flex}header h1{font-size:1.5rem}header h1 a{color:#fff;text-decoration:none}nav a{color:#fff;border-radius:4px;margin-left:1.5rem;padding:.5rem;text-decoration:none;transition:background .2s}nav a:hover{background:#ffffff1a}main{min-height:calc(100vh - 200px);padding:2rem 0}footer{color:#fff;background:#34495e;margin-top:4rem;padding:2rem 0}.card{background:#fff;border-radius:8px;margin-bottom:1.5rem;padding:1.5rem;box-shadow:0 2px 4px #0000001a}.btn{color:#fff;cursor:pointer;background:#3498db;border:none;border-radius:4px;padding:.5rem 1rem;font-size:1rem;text-decoration:none;transition:background .2s;display:inline-block}.btn:hover{background:#2980b9}.btn-secondary{background:#95a5a6}.btn-secondary:hover{background:#7f8c8d}.btn-danger{background:#e74c3c}.btn-danger:hover{background:#c0392b}.form-group{margin-bottom:1rem}.form-group label{margin-bottom:.25rem;font-weight:500;display:block}.form-group input,.form-group textarea,.form-group select{border:1px solid #ddd;border-radius:4px;width:100%;padding:.5rem;font-size:1rem}.form-group textarea{resize:vertical;min-height:100px}.alert{border-radius:4px;margin-bottom:1rem;padding:1rem}.alert-success{color:#155724;background:#d4edda;border:1px solid #c3e6cb}.alert-error{color:#721c24;background:#f8d7da;border:1px solid #f5c6cb}.grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;display:grid}.book-card{background:#fff;border-radius:8px;transition:transform .2s;overflow:hidden;box-shadow:0 2px 4px #0000001a}.book-card:hover{transform:translateY(-4px);box-shadow:0 4px 8px #00000026}.book-card img{object-fit:cover;background:#ecf0f1;width:100%;height:300px}.book-card-body{padding:1rem}.book-card h3{margin-bottom:.5rem;font-size:1.1rem}.book-card .author{color:#7f8c8d;margin-bottom:.5rem;font-size:.9rem}.book-card .price{color:#27ae60;margin:.5rem 0;font-size:1.25rem;font-weight:700}table{border-collapse:collapse;background:#fff;width:100%}th,td{text-align:left;border-bottom:1px solid #ddd;padding:.75rem}th{background:#f8f9fa;font-weight:600}.actions{gap:.5rem;display:flex}.actions form{display:inline}.badge{border-radius:4px;padding:.25rem .5rem;font-size:.875rem;font-weight:500;display:inline-block}.badge-success{color:#155724;background:#d4edda}.badge-warning{color:#856404;background:#fff3cd}.badge-info{color:#0c5460;background:#d1ecf1}