body{font-family:Arial,Helvetica,sans-serif;margin:0;background:#fafafa;color:#111}
header,footer{background:#111;color:#fff;padding:12px}
nav a{color:#fff;margin-right:12px;text-decoration:none}
main{padding:16px}
.card{background:#fff;padding:16px;margin-bottom:16px;border-radius:6px}
a.button{display:inline-block;padding:8px 12px;background:#111;color:#fff;border-radius:4px;text-decoration:none}