body { font-family: Arial, sans-serif; margin: 20px; }
h2, h3 { color: #333; }
form { margin: 15px 0; }
input, select, button { padding: 5px; margin: 3px; }
table { border-collapse: collapse; width: 100%; margin-top: 10px; }
table th, table td { padding: 8px; border: 1px solid #ccc; text-align: left; }
.success { color: green; }
.error { color: red; }