body {
            font-family: Arial, sans-serif;
            margin: 40px;
        }

        .pdf-container {
            display: grid;
            grid-template-rows: repeat(3, auto);
            grid-auto-flow: column;
            gap: 20px;
        }

        .pdf-container a {
            padding: 15px;
            background-color: #f2f2f2;
            border-radius: 5px;
            text-decoration: none;
            color: #333;
        }

        .pdf-container a:hover {
            background-color: #ddd;
        }