body{font-family:'Segoe UI',sans-serif;background:#f4f6f8;margin:0;padding:0;}
header{display:flex;justify-content:space-between;align-items:center;padding:20px 40px;background:#fff;box-shadow:0 2px 6px rgba(0,0,0,0.1);}
h1{margin:0;color:#333;}
.auth a{margin-left:10px;color:#4CAF50;text-decoration:none;}
.book-list{display:flex;flex-wrap:wrap;justify-content:center;gap:20px;padding:20px;}
.book-item{background:#fff;border-radius:8px;box-shadow:0 2px 6px rgba(0,0,0,0.15);width:180px;text-align:center;padding:10px;transition:transform 0.3s;}
.book-item:hover{transform:translateY(-5px);}
.book-item img{width:100%;height:250px;object-fit:cover;border-radius:4px;}
.book-item h3{font-size:16px;margin:10px 0 0 0;color:#555;}
form{max-width:400px;margin:50px auto;background:#fff;padding:30px;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,0.1);}
form input{width:100%;padding:10px;margin:10px 0;border-radius:4px;border:1px solid #ccc;}
form button{width:100%;padding:10px;background:#4CAF50;border:none;color:white;font-size:16px;border-radius:4px;cursor:pointer;transition:0.3s;}
form button:hover{background:#45a049;}