* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  max-width: 640px;
  margin: 2rem auto;
  padding: 0 1rem;
  line-height: 1.6;
  background: #0f0f0f;
  color: #e6e6e6;
}
h1, h2 { font-family: Georgia, serif; }
form label { display: block; margin: 1rem 0; }
form input, form textarea {
  width: 100%;
  padding: 0.5rem;
  background: #1a1a1a;
  color: #e6e6e6;
  border: 1px solid #333;
}
form button {
  padding: 0.6rem 1.2rem;
  background: #c00;
  color: white;
  border: none;
  cursor: pointer;
}