/* html {
  height: 100%;
  background: 50% 50% no-repeat
    url('data:image/svg+xml,<svg viewBox="-20 -5 60 40" width="140" xmlns="http://www.w3.org/2000/svg" opacity="0.2"><path d="M1 8l11-7 11 7v8l-11 7-11-7zm0 0l11 8 11-8m0 8L12 8 1 16M12 1v7m0 8v7" fill="none" stroke="currentColor" stroke-linejoin="round" stroke-width="2"/><text x="-12" y="32" font-size="5" font-family="monospace" fill="currentColor">Built on CodePen</text></svg>');
} */

form {
  width: 300px;
  margin: 50px auto;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
}
input {
  width: 100%;
  padding: 8px;
  margin: 6px 0;
  box-sizing: border-box;
}
button {
  width: 100%;
  padding: 10px;
  background: #4a90d9;
  color: white;
  border: none;
  cursor: pointer;
}
#message { color: red; font-size: 14px; }