:root {
  color-scheme: light;
  --background: #f5f7f9;
  --panel: #ffffff;
  --text: #18212b;
  --muted: #637083;
  --line: #d9e0e7;
  --accent: #146c5f;
  --accent-soft: #e0f3ee;
  --shadow: 0 20px 50px rgba(24, 33, 43, 0.12);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    linear-gradient(135deg, rgba(20, 108, 95, 0.13), transparent 36%),
    linear-gradient(315deg, rgba(64, 101, 150, 0.14), transparent 34%),
    var(--background);
  color: var(--text);
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
}

.status-panel {
  width: min(760px, 100%);
  padding: clamp(28px, 6vw, 56px);
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  border: 1px solid rgba(217, 224, 231, 0.92);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 4.7rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.countdown {
  display: grid;
  grid-template-columns: minmax(72px, 1fr) auto minmax(72px, 1fr) auto minmax(72px, 1fr);
  align-items: center;
  gap: clamp(8px, 2vw, 18px);
  margin: clamp(32px, 8vw, 58px) 0;
}

.time-part {
  min-width: 0;
  padding: clamp(14px, 3vw, 24px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  text-align: center;
}

.time-part span {
  display: block;
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.2rem, 11vw, 6rem);
  font-weight: 760;
  line-height: 0.95;
}

.time-part small {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: clamp(0.72rem, 2.6vw, 0.88rem);
  font-weight: 650;
  text-transform: uppercase;
}

.separator {
  color: var(--accent);
  font-size: clamp(1.8rem, 7vw, 4rem);
  font-weight: 760;
}

.details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
}

.details div {
  padding: 16px;
  border-radius: 8px;
  background: var(--accent-soft);
}

dt {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

dd {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}

@media (max-width: 620px) {
  .shell {
    align-items: stretch;
    padding: 16px;
  }

  .status-panel {
    align-self: center;
  }

  .countdown {
    grid-template-columns: 1fr;
  }

  .separator {
    display: none;
  }

  .details {
    grid-template-columns: 1fr;
  }
}