body {
            font-family: Arial, sans-serif;
            text-align: center;
            margin: 0;
            padding: 0;
        }
        header {
            background-color: black;
            color: white;
            padding: 20px;
        }
        .button-container {
            margin: 20px;
        }
        .button {
            background-color: #4CAF50;
            color: white;
            padding: 15px 25px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin: 10px;
            cursor: pointer;
            border: none;
            border-radius: 5px;
        }
        .button:hover {
            background-color: #45a049;
        }