body { font-family: Arial, sans-serif; margin: 20px;}
table { border-collapse: collapse; width: 100%;}
th, td { border: 1px solid #ccc; padding: 8px;}
tr:nth-child(even) { background: #f6f6f6;}
button { background: #0090ff; color: white; border: none; padding: 5px 10px; border-radius: 4px;}