body{font-family:Arial,sans-serif;max-width:900px;margin:auto;padding:2rem;line-height:1.6}header,footer{margin:2rem 0}a.button{display:inline-block;padding:.5rem 1rem;border:1px solid #888;border-radius:6px;text-decoration:none;margin:.2rem}section{border:1px solid #ddd;padding:1rem;border-radius:8px;margin:1rem 0}