.advent {
  position: fixed;
  inset: 0;
  z-index: 5;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  display: grid;
  align-content: start;
  justify-items: center;
  gap: 18px;
  padding: 170px 16px 40px;
  pointer-events: none;
}

.advent > * {
  pointer-events: auto;
}

.advent__head {
  text-align: center;
  color: var(--ui-text-strong);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.75);
}

.advent__title {
  margin: 0;
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 650;
  letter-spacing: 0.02em;
}

.advent__sub,
.advent__progress {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--ui-text-muted);
}

.advent__progress {
  font-variant-numeric: tabular-nums;
}

.advent__grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
  width: min(640px, 100%);
}

@media (max-width: 600px) {
  .advent {
    padding-top: 72px;
  }

  .advent__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
  }
}

.advent__door {
  position: relative;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  appearance: none;
  cursor: pointer;
  border-radius: 14px;
  min-height: 64px;
  border: 1px solid var(--ui-border);
  background: rgba(7, 16, 29, 0.8);
  background: color-mix(in srgb, var(--scene-bg-0) 80%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--ui-text-strong);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.advent__door:hover {
  transform: translateY(-2px);
  border-color: var(--ui-active-border);
}

.advent__num {
  position: absolute;
  top: 6px;
  left: 8px;
  font-size: 12px;
  font-weight: 650;
  color: var(--ui-text-muted);
  font-variant-numeric: tabular-nums;
}

.advent__emoji {
  font-size: clamp(22px, 5vw, 32px);
}

.advent__door.is-locked {
  cursor: not-allowed;
}

.advent__door.is-locked > * {
  opacity: 0.5;
}

.advent__door.is-locked:hover {
  transform: none;
}

.advent__door.is-today {
  border-color: rgba(255, 210, 120, 0.7);
  box-shadow: 0 0 18px rgba(255, 200, 100, 0.35);
}

.advent__door.is-open {
  background: rgba(110, 30, 25, 0.75);
}

.advent__door.is-done {
  background: rgba(20, 90, 50, 0.75);
}

.advent__door.is-done::after {
  content: '✓';
  position: absolute;
  top: 5px;
  right: 8px;
  font-size: 12px;
  color: #b8f5c8;
}

.advent__dialog {
  width: min(380px, calc(100vw - 32px));
  padding: 0;
  border-radius: 16px;
  border: 1px solid var(--ui-border);
  background: rgba(7, 16, 29, 0.94);
  color: var(--ui-text-strong);
}

.advent__dialog::backdrop {
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
}

.advent__dialog[open] {
  animation: advent-pop 260ms ease-out;
}

@keyframes advent-pop {
  from {
    transform: scale(0.85) rotateX(30deg);
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .advent__dialog[open] {
    animation: none;
  }
}

.advent__dlg {
  display: grid;
  gap: 8px;
  padding: 20px;
  text-align: center;
}

.advent__dlg-day {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ui-text-muted);
}

.advent__dlg-emoji {
  font-size: 56px;
  line-height: 1.1;
}

.advent__dlg-title {
  margin: 0;
  font-size: 20px;
}

.advent__dlg-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ui-text);
}

.advent__dlg-done {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  font-size: 13px;
  color: var(--ui-text);
}