:root {
  --ink: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --soft: #f8fafc;
  --accent: #0f766e;
  --accent-dark: #0b5e57;
  --error: #b91c1c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  line-height: 1.6;
}

header {
  max-width: 880px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wordmark {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-right a {
  color: var(--muted);
  text-decoration: none;
}

.header-right a:hover { text-decoration: underline; }

.badge {
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 24px;
}

.hero { padding: 40px 0 32px; }

.hero h1 {
  font-size: 44px;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
  max-width: 640px;
}

.sub {
  font-size: 19px;
  color: var(--muted);
  max-width: 640px;
  margin: 0 0 24px;
}

.proof {
  border-left: 4px solid var(--accent);
  padding-left: 16px;
  margin: 0;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 32px 0;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  background: var(--soft);
}

.card h2 {
  font-size: 17px;
  margin: 0 0 8px;
}

.card p { margin: 0; color: var(--muted); }

.beta {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
  margin: 32px 0;
}

.beta h2 { margin: 0 0 8px; }

.beta > p { color: var(--muted); margin: 0 0 20px; }

form label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 14px;
}

form input,
form textarea {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  font: inherit;
  font-weight: 400;
  border: 1px solid var(--line);
  border-radius: 8px;
}

form textarea { resize: vertical; }

.optional { font-weight: 400; color: var(--muted); }

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

button[type="submit"] {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button[type="submit"]:hover:not(:disabled) { background: var(--accent-dark); }

button[type="submit"]:disabled { opacity: 0.6; cursor: default; }

.form-note {
  font-size: 13px;
  color: var(--muted);
  margin: 12px 0 0;
}

.form-success { color: var(--accent-dark); font-weight: 600; }
.form-error { color: var(--error); font-weight: 600; }

footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

footer p { margin: 0; }

@media (max-width: 640px) {
  .hero h1 { font-size: 32px; }
  .steps { grid-template-columns: 1fr; }
  .beta { padding: 20px; }
}