body {
            font-family: Arial, sans-serif;
            margin: 0;
            background-color: #f4f4f4;
        }
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 20px;
            background: #333;
            color: white;
        }
        .navbar .logo {
            font-size: 22px;
            font-weight: bold;
        }
        .navbar select {
            padding: 5px;
            font-size: 16px;
            border-radius: 5px;
        }
        .navbar input {
            padding: 5px;
            font-size: 16px;
            border-radius: 5px;
            width: 200px;
        }
        
        
        .nav-controls {
            display: flex;
            gap: 10px; /* Adjust space between elements */
            align-items: center;
        }
        
        .nav-controls input,
        .nav-controls select {
            padding: 5px;
            font-size: 14px;
            border-radius: 5px;
            border: 1px solid #ccc;
        }

        .container {
            max-width: 1200px;
            margin: auto;
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            margin-top: 20px;
        }
        .ebook-category {
            margin-bottom: 20px;
            display: none; /* Hide categories initially */
        }
        .grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }
        .ebook-card {
            background: #fff;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            text-align: center;
        }
        .ebook-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 5px;
        }
        .ebook-card h3 {
            font-size: 18px;
            margin: 10px 0;
        }
        .ebook-card p {
            font-size: 14px;
            color: #555;
        }
        .download-btn {
            display: inline-block;
            text-decoration: none;
            background: #28a745;
            color: white;
            padding: 8px 12px;
            border-radius: 5px;
            margin-top: 10px;
        }
        .footer {
            background: #333;
            color: white;
            text-align: center;
            padding: 10px 0; /* Increase padding for more height */
            height: 30px; /* Explicit height */
            position: fixed;
            bottom: 0;
            width: 100%;
            font-size: 14px;
        }