body { font-family: 'Segoe UI', sans-serif; line-height: 1.6; margin: 0; padding: 0; color: #333; }
header { background: #0056b3; color: white; padding: 20px; display: flex; justify-content: space-between; align-items: center; }
nav ul { list-style: none; display: flex; gap: 20px; margin: 0; padding: 0; }
nav a { color: white; text-decoration: none; font-weight: bold; }
main { max-width: 900px; margin: 20px auto; padding: 20px; min-height: 400px; }
footer { background: #333; color: #ccc; text-align: center; padding: 20px; margin-top: 40px; }