body font-family: Arial, sans-serif; line-height: 1.6; color: #333; max-width: 800px; margin: 0 auto; padding: 20px; background-color: #f4f4f4; header text-align: center; background: #007bff; color: white; padding: 20px; border-radius: 8px; h1, h2 color: #007bff; h1 font-size: 2.5em; margin-bottom: 20px;