body { font-family: Arial, sans-serif; margin: 0; padding: 0; background-color: #f4f4f4; } header { background: #35424a; color: white; padding: 10px 0; text-align: center; } nav ul { list-style: none; padding: 0; } nav ul li { display: inline; margin: 0 15px; } nav a { color: white; text-decoration: none; } main { padding: 20px; } section { margin-bottom: 20px; padding: 20px; background: white; border-radius: 5px; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); } footer { text-align: center; padding: 10px 0; background: #35424a; color: white; }