:root {
  color-scheme: dark;
  --bg: #0f1720;
  --card: #18222e;
  --fg: #e7eef6;
  --muted: #8aa0b4;
  --accent: #36c08a;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1.5rem;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.5;
}

.card {
  max-width: 32rem;
  width: 100%;
  padding: 2.5rem 2rem;
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  text-align: center;
}

h1 {
  margin: 0 0 0.75rem;
  font-size: 1.7rem;
  color: var(--accent);
}

.lead {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.muted {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}