body { font-family: sans-serif; line-height: 1.6; margin: 0; padding: 0; background-color: #f9f9f9; } .container { max-width: 800px; margin: 20px auto; padding: 20px; background-color: #fff; box-shadow: 0 0 10px rgba(0,0,0,0.1); } h1, h2, h3 { color: #333; margin-top: 1.5em; margin-bottom: 0.5em; } …