body { font-family: Arial, sans-serif; margin: 0; padding: 0; }
header, footer { background: #efe4d6; padding: 1em; text-align: center; }
nav a { margin: 0 10px; color: #a0522d; text-decoration: none; }
main { max-width: 900px; margin: 20px auto; padding: 1em;}
.flashes { list-style: none; padding: 0;}
.flashes li.success { color: green;}
@media (max-width: 600px) { nav {display: block;} }