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<html><head><style>table, th, td { border: 1px solid black; border-collapse: collapse;}</style></head><body><h2>Collapsed Borders</h2><p>If you want the borders to collapse into one border, add the CSS border-collapse property.</p><table style="width:100%"> <tr> <th>Firstname</th> <th>Lastname</th> <th>Age</th> </tr> <tr> <td>Jill</td> <td>Smith</td> <td>50</td> </tr> <tr> <td>Eve</td> <td>Jackson</td> <td>94</td> </tr> <tr> <td>John</td> <td>Doe</td> <td>80</td> </tr></table></body></html>