/* Minimal, mobile‑friendly styling */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0 1rem;
  background: #fafafa;
  color: #222;
}
header {
  text-align: center;
  padding: 2rem 0;
}
h1 { font-size: 2.5rem; margin: 0; }
.tagline { font-size: 1.2rem; color: #555; }
main { max-width: 720px; margin: 0 auto; }
section { margin: 2rem 0; }
ol { padding-left: 1.2rem; }
.btn {
  display: inline-block;
  background: #0066cc;
  color: #fff;
  padding: .6rem 1rem;
  border-radius: 4px;
  text-decoration: none;
}
.btn:hover { background: #0055aa; }
form { display: flex; gap: .5rem; }
input[type="email"] {
  flex: 1;
  padding: .5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}
button {
  background: #0066cc;
  color: #fff;
  border: none;
  padding: .5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
}
button:hover { background: #0055aa; }
footer { text-align: center; padding: 1rem 0; font-size: .9rem; color: #777; }