body { font-family: Arial, sans-serif; margin: 20px; }
nav { background: #333; padding: 10px; }
nav a { color: white; margin-right: 15px; text-decoration: none; }
table { border-collapse: collapse; width: 100%; margin-top: 20px; }
th, td { padding: 8px; text-align: left; border-bottom: 1px solid #ddd; }
th { background-color: #f2f2f2; }
form label { display: block; margin-bottom: 8px; }
button { padding: 10px 20px; background: #4CAF50; color: white; border: none; cursor: pointer; margin-top: 10px; }