:root {
  --countdown-font: "Playfair Display", Georgia, serif;
  --text: #fff;
  --shadow: rgba(0, 22, 42, 0.55);
  --line: rgba(255, 255, 255, 0.36);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  background-color: #0b4d64;
  background-image:
    linear-gradient(rgba(0, 55, 83, 0.1), rgba(0, 30, 48, 0.26)),
    var(--countdown-background, none);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  color: var(--text);
  font-family: var(--countdown-font);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.08), rgba(0, 38, 57, 0.2) 72%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.08), rgba(0, 0, 0, 0.24));
  pointer-events: none;
}

.countdown-shell {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 100svh;
  padding: clamp(28px, 7vw, 84px);
  place-items: center;
}

.countdown-panel {
  width: min(1120px, 100%);
  padding: clamp(20px, 4vw, 44px) 0;
  text-align: center;
  text-shadow: 0 4px 20px var(--shadow);
}

.countdown-title {
  margin: 0 0 clamp(22px, 4vw, 44px);
  font-size: clamp(2.25rem, 6vw, 5.4rem);
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0 auto;
  width: min(100%, 980px);
}

.countdown-unit {
  display: grid;
  min-width: 0;
  padding: 0 clamp(10px, 2.5vw, 34px);
  position: relative;
}

.countdown-unit + .countdown-unit::before {
  background: linear-gradient(180deg, transparent, var(--line), transparent);
  content: "";
  height: 76%;
  left: 0;
  position: absolute;
  top: 12%;
  width: 1px;
}

.countdown-value {
  display: block;
  font-size: clamp(3rem, 10vw, 8.75rem);
  font-weight: 800;
  line-height: 0.9;
  min-height: 0.9em;
  text-align: center;
  white-space: nowrap;
}

.countdown-label {
  display: block;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(0.78rem, 1.7vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.1;
  margin-top: clamp(8px, 1.3vw, 14px);
  text-transform: lowercase;
}

.target-label,
.finished-message {
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  display: inline-block;
  font-size: clamp(1.25rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  margin: clamp(28px, 5vw, 56px) 0 0;
  padding: clamp(18px, 3vw, 30px) clamp(16px, 5vw, 72px) 0;
}

.finished-message {
  font-size: clamp(2rem, 5vw, 4.8rem);
}

[hidden] {
  display: none !important;
}

@media (max-width: 680px) {
  .countdown-shell {
    padding: 28px 18px;
  }

  .countdown-grid {
    gap: 18px 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .countdown-unit:nth-child(3)::before {
    display: none;
  }

  .countdown-value {
    font-size: clamp(3.7rem, 20vw, 6.5rem);
  }
}

@media (max-width: 380px) {
  .countdown-grid {
    grid-template-columns: 1fr;
  }

  .countdown-unit + .countdown-unit::before {
    display: none;
  }
}