:root {
  color-scheme: dark;
  --bg1: #0f172a;
  --bg2: #111827;
  --card: rgba(15, 23, 42, 0.72);
  --border: rgba(255, 255, 255, 0.12);
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #38bdf8;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  display: grid;
  place-items: center;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(56, 189, 248, 0.24), transparent 35%),
    linear-gradient(135deg, var(--bg1), var(--bg2));
}

.card {
  width: min(92vw, 560px);
  padding: 3rem 2.5rem;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--card);
  backdrop-filter: blur(18px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  text-align: center;
}

.eyebrow {
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.78rem;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 5rem);
  line-height: 1;
}

.subtext {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
}