body { font-family: Arial, sans-serif; margin: 0; padding: 0; background: #f4f4f4; color: #333; } header { background: #4CAF50; color: white; padding: 10px 20px; text-align: center; } h1, h2 { margin: 10px 0; } section { margin: 20px; padding: 20px; background: white; border-radius: 5px; box-shadow: 0 0 10px rgba(0, 0, 0, 0.1); } footer { background: #4CAF50; color: white; text-align: center; padding: 10px 0; } a { color: #4CAF50; text-decoration: none; } a:hover { text-decoration: underline; }