body {
  font-family: sans-serif;
  background: #f9fafb;
  margin: 0;
  padding: 0;
}
a { text-decoration: none; }
input, textarea { display: block; margin: 0.5em 0; padding: 0.5em; width: 100%; max-width: 400px; }
form button { padding: 0.5em 1em; background: #1e40af; color: white; border: none; }