:root {
  color-scheme: dark;
  --bg: #071015;
  --bg-soft: #0f1d25;
  --panel: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.12);
  --ink: #f6fbff;
  --muted: #9ab0bd;
  --accent: #7fc64a;
  --glow: rgba(109, 167, 230, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", "Inter", sans-serif;
  background:
    radial-gradient(circle at top left, var(--glow), transparent 28%),
    radial-gradient(circle at bottom right, rgba(127, 198, 74, 0.12), transparent 24%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  color: var(--ink);
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.page-shell {
  width: 100%;
  max-width: 1080px;
}

.hero-card {
  border: 1px solid var(--line);
  border-radius: 32px;
  padding: 40px 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04)),
    rgba(255, 255, 255, 0.04);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(20px);
}

.hero-heading {
  text-align: center;
}

.title-line {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.8rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.06em;
  color: var(--ink);
}

h1 {
  margin: 12px 0 0;
  font-size: clamp(2.6rem, 6vw, 5.8rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
  text-align: center;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.time-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px 18px;
  background: var(--panel);
}

.time-value {
  display: block;
  font-size: clamp(2.4rem, 5vw, 4.4rem);
  font-weight: 700;
  letter-spacing: -0.06em;
}

.time-label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

@media (max-width: 720px) {
  .hero-card {
    padding: 28px 20px;
  }

  .countdown-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}