body { font-family: Arial, sans-serif; margin: 20px; }
header h1 { color: #333; }
nav a { margin-right: 15px; text-decoration: none; color: #007BFF; }
nav a:hover { text-decoration: underline; }
ul { list-style-type: none; padding: 0; }
li { background: #f5f5f5; margin: 10px 0; padding: 10px; border-radius: 5px; }
input, select, textarea { margin: 5px 0; }