:root {
  color-scheme: dark;
  --bg: #101412;
  --panel: rgba(248, 248, 239, 0.08);
  --panel-border: rgba(248, 248, 239, 0.18);
  --text: #f8f8ef;
  --muted: #c8c2b2;
  --gold: #e7c25a;
  --green: #5ad39f;
  --pink: #ef7aa0;
  --shadow: rgba(0, 0, 0, 0.38);
}

* {
  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:
    radial-gradient(circle at 18% 20%, rgba(90, 211, 159, 0.28), transparent 30%),
    radial-gradient(circle at 82% 16%, rgba(239, 122, 160, 0.24), transparent 27%),
    linear-gradient(135deg, #101412 0%, #1c2120 44%, #16122a 100%);
  color: var(--text);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: clamp(20px, 5vw, 56px);
}

.countdown-panel {
  width: min(960px, 100%);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background:
    linear-gradient(140deg, rgba(248, 248, 239, 0.12), rgba(248, 248, 239, 0.05)),
    var(--panel);
  box-shadow: 0 28px 80px var(--shadow);
  padding: clamp(24px, 6vw, 56px);
  overflow: hidden;
  position: relative;
}

.countdown-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(248, 248, 239, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(248, 248, 239, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.88), transparent 78%);
  pointer-events: none;
}

.headline,
.timer-grid,
.progress-wrap {
  position: relative;
  z-index: 1;
}

.headline {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 8vw, 6.4rem);
  line-height: 0.94;
  letter-spacing: 0;
}

.subtitle {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  line-height: 1.55;
}

.timer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(28px, 5vw, 46px);
}

.time-unit {
  min-width: 0;
  border: 1px solid rgba(248, 248, 239, 0.16);
  border-radius: 8px;
  background: rgba(7, 10, 9, 0.34);
  padding: clamp(16px, 3vw, 26px) clamp(10px, 2vw, 18px);
  text-align: center;
}

.value {
  display: block;
  font-variant-numeric: tabular-nums;
  font-size: clamp(2rem, 6.8vw, 4.9rem);
  font-weight: 850;
  line-height: 1;
}

.label {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: clamp(0.72rem, 1.8vw, 0.86rem);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.progress-wrap {
  margin-top: clamp(26px, 4vw, 38px);
}

.progress-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(248, 248, 239, 0.14);
  overflow: hidden;
}

.progress-bar {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green), var(--gold), var(--pink));
  transition: width 600ms ease;
}

.progress-labels {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.progress-labels span:nth-child(2) {
  color: var(--text);
  text-align: center;
}

@media (max-width: 700px) {
  .app-shell {
    place-items: stretch;
  }

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

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

@media (max-width: 420px) {
  .timer-grid {
    gap: 8px;
  }

  .time-unit {
    padding-inline: 8px;
  }

  .progress-labels {
    font-size: 0.76rem;
  }
}