:root {
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --ink: #0f172a;
  --muted: #475569;
  --bg: #ffffff;
  --card: #f8fafc;
  --border: #e2e8f0;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 720px; margin: 0 auto; padding: 0 24px; }

header {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }

.hero { padding: 72px 0 40px; text-align: center; }
.hero h1 {
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin-bottom: 16px;
}
.hero p.sub {
  font-size: 19px;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
}

.benefits {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 24px 0 40px;
}
.benefit {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.benefit h3 { font-size: 16px; margin-bottom: 8px; }
.benefit p { font-size: 14px; color: var(--muted); }

.how { padding: 32px 0 48px; }
.how h2 { font-size: 24px; text-align: center; margin-bottom: 24px; letter-spacing: -0.01em; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { text-align: center; padding: 0 8px; }
.step .num {
  width: 32px; height: 32px; line-height: 32px;
  border-radius: 50%; background: var(--accent); color: #fff;
  font-weight: 700; margin: 0 auto 12px;
}
.step h4 { font-size: 15px; margin-bottom: 6px; }
.step p { font-size: 14px; color: var(--muted); }

.waitlist {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  margin-bottom: 64px;
}
.waitlist h2 { font-size: 22px; margin-bottom: 8px; }
.waitlist p.hint { color: var(--muted); font-size: 15px; margin-bottom: 20px; }
.waitlist form { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.waitlist input[type="email"] {
  flex: 1 1 260px;
  padding: 13px 16px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
}
.waitlist input[type="email"]:focus { border-color: var(--accent); }
.waitlist button {
  padding: 13px 28px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background .15s;
}
.waitlist button:hover { background: var(--accent-dark); }
.form-msg { flex-basis: 100%; font-size: 14px; margin-top: 12px; min-height: 20px; color: var(--muted); }
.form-msg.ok { color: #16a34a; }
.form-msg.err { color: #dc2626; }

footer { padding: 24px 0 48px; text-align: center; color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); }

@media (max-width: 640px) {
  .hero h1 { font-size: 30px; }
  .benefits, .steps { grid-template-columns: 1fr; }
}