body { font-family: Arial, sans-serif; margin: 0; padding: 20px; background-color: #f4f4f4; }
header { background: #333; color: white; padding: 10px; text-align: center; }
nav { margin: 10px 0; }
nav a { margin-right: 10px; text-decoration: none; color: #333; }
form { max-width: 400px; margin: 20px auto; padding: 20px; background: white; border: 1px solid #ddd; }
input, textarea { width: 100%; margin: 10px 0; padding: 10px; }
button { padding: 10px; background: #333; color: white; border: none; }
table { width: 100%; border-collapse: collapse; margin: 20px 0; }
th, td { border: 1px solid #ddd; padding: 8px; text-align: left; }
th { background: #f4f4f4; }