<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Dynamic Data Table</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            background-color: #f0f2f5;
        }
        .container {
            max-width: 800px;
            margin: 50px auto;
            padding: 20px;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }
        th, td {
            padding: 12px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        th {
            background-color: #007bff;
            color: white;
        }
        tr:hover {
            background-color: #f1f1f1;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>Dynamic Data Table</h1>
        <button onclick="addRow()">Add Row</button>
        <table id="dataTable">
            <thead>
                <tr>
                    <th>Name</th>
                    <th>Age</th>
                    <th>Email</th>
                </tr>
            </thead>
            <tbody>
            </tbody>
        </table>
    </div>

    <script>
        function addRow() {
            const table = document.getElementById('dataTable').getElementsByTagName('tbody')[0];
            const row = table.insertRow();
            const nameCell = row.insertCell(0);
            const ageCell = row.insertCell(1);
            const emailCell = row.insertCell(2);

            nameCell.textContent = 'John Doe';
            ageCell.textContent = '30';
            emailCell.textContent = 'john.doe@example.com';
        }
    </script>
</body>
</html>