:root {
  --bg: #0f172a;
  --card-bg: #1e293b;
  --accent: #38bdf8;
  --text: #e2e8f0;
  --muted: #94a3b8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at top, #1e293b, var(--bg));
  color: var(--text);
}

.card {
  background: var(--card-bg);
  padding: 3rem 3.5rem;
  border-radius: 16px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
  text-align: center;
  max-width: 32rem;
}

.card h1 {
  margin: 0 0 1rem;
  font-size: 2.5rem;
  color: var(--accent);
}

.card p {
  margin: 0.5rem 0;
  line-height: 1.6;
}

.tag {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.03em;
}