body{color:#333;background-color:#f4f4f9;margin:0;padding:0;font-family:Arial,sans-serif;line-height:1.6}header{color:#fff;text-align:center;background-color:#2c3e50;padding:2rem 1rem}main{max-width:800px;margin:2rem auto;padding:0 1rem}section{background:#d4e6f1;border-radius:8px;margin-bottom:1.5rem;padding:1.5rem;box-shadow:0 2px 4px #0000001a}footer{text-align:center;color:#fff;background-color:#2c3e50;padding:1rem}@media (width<=600px){main{margin:1rem .5rem;padding:0}header{padding:1.5rem .5rem}}