body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    color: #333;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

.search-bar {
    display: flex;
}

.search-bar input {
    padding: 8px 15px;
    border: none;
    border-radius: 4px 0 0 4px;
    width: 250px;
}

.search-bar button {
    padding: 8px 15px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}

.search-bar button:hover {
    background-color: #2980b9;
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
}

.book-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.book-card {
    background-color: white;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.book-card:hover {
    transform: translateY(-5px);
}

.book-title {
    font-weight: bold;
    margin-bottom: 15px;
    font-size: 16px;
}

.download-btn {
    display: block;
    text-align: center;
    background-color: #27ae60;
    color: white;
    padding: 8px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
}

.download-btn:hover {
    background-color: #219653;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 30px;
}

.no-results {
    text-align: center;
    padding: 50px;
    color: #666;
    grid-column: 1 / -1;
}