* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: #1c2430;
  background: #f7f5f0;
  line-height: 1.55;
}
main { max-width: 720px; margin: 0 auto; padding: 0 1rem 3rem; }
.top {
  display: flex; justify-content: space-between; align-items: center;
  padding: .75rem 1rem; background: #fff; border-bottom: 1px solid #e5e0d6;
  position: sticky; top: 0; z-index: 10;
}
.logo { font-weight: 700; font-size: 1.1rem; color: #0e7490; }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 1.5rem 0 .75rem; }
h2 { font-size: 1.3rem; margin: 2.5rem 0 1rem; }
h3 { margin: 0 0 .5rem; font-size: 1.05rem; }
.hero { text-align: center; padding-top: 1rem; }
.sub { color: #45505e; font-size: 1.05rem; }
.hint { color: #6b7280; font-size: .85rem; }
.btn {
  display: inline-block; border: 0; border-radius: 10px; cursor: pointer;
  font-size: 1rem; font-weight: 600; text-decoration: none; text-align: center;
  padding: .8rem 1.4rem;
}
.btn-primary { background: #0e7490; color: #fff; }
.btn-primary:hover { background: #0c637b; }
.btn-small { padding: .45rem .8rem; font-size: .85rem; background: #25d366; color: #fff; }
.card {
  background: #fff; border: 1px solid #e5e0d6; border-radius: 14px;
  padding: 1.25rem; margin: 1rem 0;
}
.cards3, .cards2 { display: grid; gap: 1rem; }
@media (min-width: 640px) {
  .cards3 { grid-template-columns: repeat(3, 1fr); }
  .cards2 { grid-template-columns: repeat(2, 1fr); }
  h1 { font-size: 2.2rem; }
}
.featured { border: 2px solid #0e7490; }
.price { font-size: 1.5rem; font-weight: 700; margin: .25rem 0; color: #0e7490; }
label { display: block; font-weight: 600; margin: .75rem 0 .25rem; font-size: .9rem; }
input, textarea, select {
  width: 100%; padding: .65rem; border: 1px solid #cfd6dd; border-radius: 8px;
  font: inherit; background: #fff;
}
.row { display: grid; gap: .75rem; }
@media (min-width: 480px) { .row { grid-template-columns: 2fr 1fr; } }
form .btn { margin-top: 1rem; width: 100%; }
#demo-output {
  margin-top: 1rem; padding: 1rem; background: #f0f9f9;
  border: 1px solid #bce3e3; border-radius: 10px; white-space: pre-wrap;
}
#lead-website { position: absolute; left: -9999px; height: 0; opacity: 0; }
footer { text-align: center; color: #6b7280; font-size: .85rem; padding: 2rem 1rem; }
footer a { color: inherit; }