:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 20% 20%, rgba(96, 165, 250, .25), transparent 30%),
    radial-gradient(circle at 80% 30%, rgba(168, 85, 247, .20), transparent 32%),
    linear-gradient(135deg, #020617, #0f172a 48%, #111827);
  color: #e5e7eb;
}

main {
  width: min(720px, calc(100vw - 32px));
  padding: 42px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 28px;
  background: rgba(15, 23, 42, .68);
  box-shadow: 0 24px 90px rgba(0, 0, 0, .45);
  backdrop-filter: blur(18px);
  text-align: center;
}

.badge {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(34, 197, 94, .12);
  border: 1px solid rgba(34, 197, 94, .28);
  color: #bbf7d0;
  font-size: 14px;
}

h1 {
  margin: 22px 0 12px;
  font-size: clamp(42px, 8vw, 84px);
  line-height: .95;
  letter-spacing: -.07em;
}

p {
  margin: 0 auto 28px;
  max-width: 560px;
  color: #cbd5e1;
  font-size: 18px;
  line-height: 1.6;
}

.timer {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.cell {
  padding: 18px 10px;
  border-radius: 18px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .10);
}

.num {
  display: block;
  font-size: clamp(26px, 5vw, 44px);
  font-weight: 800;
  letter-spacing: -.04em;
}

.label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .16em;
  color: #94a3b8;
}

footer {
  margin-top: 28px;
  color: #64748b;
  font-size: 13px;
}

@media (max-width: 560px) {
  main {
    padding: 28px 20px;
  }

  .timer {
    grid-template-columns: repeat(2, 1fr);
  }
}