:root {
  color-scheme: dark;
  --bg: #070b1f;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #60a5fa;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.card {
  max-width: 560px;
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(148,163,184,0.16);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
}
h1 { margin: 0 0 0.75rem; font-size: 2rem; }
p { color: var(--muted); margin: 0 0 1rem; line-height: 1.6; }
a {
  display: inline-block;
  margin-top: 0.5rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
a:hover { text-decoration: underline; }