body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #222;
    color: white;
    padding: 10px;
}

nav a {
    color: #ffd700;
    margin: 0 10px;
    text-decoration: none;
}

main {
    margin-top: 20px;
}

.book {
    display: inline-block;
    width: 200px;
    margin: 15px;
    padding: 10px;
    background-color: white;
    border: 1px solid #ccc;
    text-align: center;
}