:root { --bg: #0b1020; --ink: #eef2ff; --muted: #a7b0d0; --accent: #e8590c; --card: #141b33; }
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: #ffb37a; }

.hero { position: relative; min-height: min(92vh, 860px); overflow: hidden;
  background: radial-gradient(120% 90% at 70% 40%, #24306a 0%, #121a3a 45%, var(--bg) 80%); }
#stage { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero-text { position: relative; z-index: 2; max-width: 680px; padding: 9vh 6vw 0; pointer-events: none; }
.hero-text > * { pointer-events: auto; }
.brand { font-weight: 800; letter-spacing: .02em; font-size: 20px; opacity: .9; }
.brand span { color: var(--accent); }
h1 { font-size: clamp(34px, 4.6vw, 60px); line-height: 1.04; margin: .35em 0 .3em; letter-spacing: -.02em; }
.lead { color: var(--muted); font-size: clamp(16px, 1.6vw, 19px); max-width: 30em; }
.sub { color: var(--muted); font-size: 14px; }
.tryname { display: flex; gap: 8px; margin: 22px 0 10px; max-width: 420px; }
.tryname input { flex: 1; min-width: 0; font: inherit; font-size: 18px; padding: 12px 14px; border-radius: 10px;
  border: 1px solid #3a4680; background: #0e1530cc; color: var(--ink); }
.tryname button, .btn { font: inherit; font-weight: 700; padding: 12px 18px; border-radius: 10px; border: 0;
  background: var(--accent); color: #fff; cursor: pointer; text-decoration: none; white-space: nowrap; }
.tryname button:hover, .btn:hover { filter: brightness(1.08); }
.now { position: absolute; z-index: 2; right: 4vw; bottom: 4vh; text-align: right; }
.now span { display: block; font-size: 22px; font-weight: 700; }
.now a { font-size: 14px; }

main { max-width: 1100px; margin: 0 auto; padding: 48px 20px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.card { background: var(--card); border: 1px solid #263063; border-radius: 16px; padding: 22px; display: flex;
  flex-direction: column; gap: 10px; }
.card h2 { margin: 0; font-size: 22px; }
.card p { margin: 0; color: var(--muted); }
.card .tryname { margin: 6px 0 0; }
.card .tryname input { font-size: 16px; padding: 10px 12px; }
.card .tryname button, .card .btn { padding: 10px 14px; }
.card .actions { margin-top: auto; padding-top: 6px; }
.how { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 40px; }
.how b { font-size: 17px; }
.how p { color: var(--muted); margin: 6px 0 0; }
footer { text-align: center; color: var(--muted); padding: 30px 20px 50px; font-size: 14px; }

@media (max-width: 720px) {
  .hero { min-height: 100vh; }
  .hero-text { padding-top: 6vh; }
  .now { left: 6vw; right: auto; text-align: left; }
}

/* social preview card (1200 x 630, ?og) */
body.og { overflow: hidden; }
body.og .hero { height: 630px; min-height: 0; }
body.og main, body.og footer, body.og .tryname, body.og .sub, body.og .now { display: none; }
body.og .hero-text { padding: 70px 0 0 70px; max-width: 600px; }
body.og h1 { font-size: 64px; }
body.og .lead { font-size: 22px; }
body.og .brand { font-size: 28px; }