:root {
  color-scheme: light;
  --background: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.92);
  --text: #172033;
  --muted: #647087;
  --accent: #4f46e5;
  --accent-soft: #e0e7ff;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.18), transparent 32rem),
    radial-gradient(circle at 85% 80%, rgba(14, 165, 233, 0.14), transparent 30rem),
    var(--background);
}

.page-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 1.5rem;
}

.card {
  width: min(100%, 40rem);
  padding: clamp(2.5rem, 8vw, 5rem) clamp(1.5rem, 7vw, 4rem);
  text-align: center;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 1.5rem;
  box-shadow: 0 1.5rem 4rem rgba(23, 32, 51, 0.12);
  backdrop-filter: blur(12px);
}

.icon {
  display: grid;
  width: 4.5rem;
  height: 4.5rem;
  margin: 0 auto 1.5rem;
  place-items: center;
  font-size: 2.25rem;
  background: var(--accent-soft);
  border-radius: 50%;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 30rem;
  margin: 0 auto 1rem;
  font-size: clamp(2rem, 6vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.message {
  max-width: 31rem;
  margin: 0 auto;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}