:root {
  --advent-bg: #0b1530;
  --advent-bg-2: #142258;
  --advent-gold: #f5c56b;
  --advent-gold-2: #d49732;
  --advent-red: #b8213a;
  --advent-red-2: #7d1022;
  --advent-green: #1e6b3a;
  --advent-ivory: #fff7e4;
  --advent-shadow: rgba(0, 0, 0, 0.35);
  --advent-radius: 12px;
  --advent-gap: 10px;
}

body.advent-calendar {
  background:
    radial-gradient(circle at 20% 10%, rgba(245, 197, 107, 0.12), transparent 55%),
    radial-gradient(circle at 80% 90%, rgba(184, 33, 58, 0.18), transparent 55%),
    linear-gradient(160deg, var(--advent-bg) 0%, var(--advent-bg-2) 100%);
  color: var(--advent-ivory);
  min-height: 100vh;
  overflow-x: hidden;
}

body.advent-calendar main {
  overflow: unset !important;
  height: auto !important;
}

body.advent-calendar header {
  background: transparent;
  padding-top: 0;
}

body.advent-calendar h1 {
  font-family: "Titillium Web", sans-serif;
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.2;
  margin: 0.5rem 0;
  text-align: center;
  color: var(--advent-gold);
  text-shadow: 0 2px 8px var(--advent-shadow);
}

.advent {
  padding: 1rem 1rem 2rem;
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.advent__intro {
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.45;
  margin: 0.5rem 1rem 1.5rem;
  opacity: 0.9;
}

.advent__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--advent-gap);
  width: 100%;
  max-width: 420px;
}

@media (min-width: 480px) {
  .advent__grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

.advent__cell {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--advent-radius);
  background: linear-gradient(145deg, var(--advent-red) 0%, var(--advent-red-2) 100%);
  color: var(--advent-ivory);
  font-family: "Titillium Web", sans-serif;
  font-weight: 700;
  font-size: clamp(1.2rem, 5vw, 1.8rem);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--advent-gold);
  box-shadow:
    inset 0 0 0 3px rgba(255, 255, 255, 0.08),
    0 4px 10px var(--advent-shadow);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.15s ease, box-shadow 0.2s ease, opacity 0.3s ease;
}

.advent__cell:nth-child(3n) {
  background: linear-gradient(145deg, var(--advent-green) 0%, #0d3d20 100%);
}

.advent__cell:nth-child(5n) {
  background: linear-gradient(145deg, var(--advent-gold) 0%, var(--advent-gold-2) 100%);
  color: var(--advent-bg);
}

.advent__cell:active {
  transform: scale(0.95);
}

.advent__cell--locked {
  filter: grayscale(0.7) brightness(0.7);
  cursor: not-allowed;
}

.advent__cell--locked::before {
  content: "🔒";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  opacity: 0.55;
  background: rgba(0, 0, 0, 0.35);
  border-radius: calc(var(--advent-radius) - 2px);
}

.advent__cell--today {
  animation: advent-today-pulse 1.6s ease-in-out infinite;
  box-shadow:
    inset 0 0 0 3px rgba(255, 255, 255, 0.15),
    0 0 0 3px var(--advent-gold),
    0 6px 20px rgba(245, 197, 107, 0.55);
}

@keyframes advent-today-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.advent__cell--opened {
  opacity: 0.45;
  pointer-events: none;
  background: linear-gradient(145deg, #333 0%, #111 100%) !important;
  border-color: #555;
  color: #999;
  animation: none;
  box-shadow: none;
}

.advent__cell--opened::after {
  content: "✓";
  position: absolute;
  top: 4px;
  right: 6px;
  font-size: 0.75rem;
  color: var(--advent-gold);
  opacity: 0.8;
}

.advent__cell--won::after {
  content: "★";
  color: var(--advent-gold);
  opacity: 1;
}

.advent__status {
  margin-top: 1rem;
  font-size: 0.85rem;
  min-height: 1.2em;
  text-align: center;
  opacity: 0.8;
}

.advent .back {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.6rem 1.4rem;
  border: 1px solid var(--advent-gold);
  border-radius: 999px;
  color: var(--advent-gold);
  text-decoration: none;
  font-family: "Titillium Web", sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
}

.advent__modal {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 20, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
  backdrop-filter: blur(6px);
}

.advent__modal[aria-hidden="false"] {
  display: flex;
  animation: advent-fade 0.3s ease;
}

@keyframes advent-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.advent__modal-inner {
  max-width: 360px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.advent__countdown {
  font-family: "Titillium Web", sans-serif;
  font-size: 4rem;
  font-weight: 800;
  color: var(--advent-gold);
  min-height: 1em;
  line-height: 1;
  text-shadow: 0 4px 20px rgba(245, 197, 107, 0.5);
  animation: advent-pulse 1s ease infinite;
}

@keyframes advent-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

.advent__box {
  position: relative;
  width: 180px;
  height: 180px;
  perspective: 1000px;
  transform-style: preserve-3d;
}

.advent__box-front,
.advent__box-back {
  position: absolute;
  inset: 0;
  border-radius: var(--advent-radius);
  backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px var(--advent-shadow);
  transition: transform 0.9s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

.advent__box-front {
  background: linear-gradient(145deg, var(--advent-red) 0%, var(--advent-red-2) 100%);
  border: 3px solid var(--advent-gold);
  color: var(--advent-ivory);
  font-family: "Titillium Web", sans-serif;
  font-weight: 800;
  font-size: 4rem;
  transform: rotateY(0);
}

.advent__box-front::before,
.advent__box-front::after {
  content: "";
  position: absolute;
  background: var(--advent-gold);
}

.advent__box-front::before {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 8px;
  transform: translateX(-50%);
}

.advent__box-front::after {
  left: 0;
  right: 0;
  top: 50%;
  height: 8px;
  transform: translateY(-50%);
}

.advent__box-back {
  background: linear-gradient(145deg, var(--advent-ivory) 0%, #e7d8a8 100%);
  color: var(--advent-red-2);
  transform: rotateY(180deg);
  padding: 1rem;
}

.advent__box.is-opening .advent__box-front {
  transform: rotateY(180deg);
}

.advent__box.is-opening .advent__box-back {
  transform: rotateY(0);
}

.advent__reveal {
  font-size: 3.5rem;
  line-height: 1;
  text-align: center;
  animation: advent-pop 0.6s 0.7s both cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

.advent__reveal .advent__gift-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-top: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

@keyframes advent-pop {
  0% { transform: scale(0); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.advent__result {
  font-family: "Titillium Web", sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  min-height: 1.5em;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.advent__result.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.advent__result--won {
  color: var(--advent-gold);
}

.advent__result--lost {
  color: var(--advent-ivory);
  opacity: 0.85;
}

.advent__close {
  padding: 0.7rem 1.8rem;
  background: var(--advent-gold);
  color: var(--advent-bg);
  border: none;
  border-radius: 999px;
  font-family: "Titillium Web", sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.advent__close.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.advent__flake {
  position: fixed;
  top: -20px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 1rem;
  pointer-events: none;
  animation: advent-fall linear forwards;
  z-index: 1100;
}

@keyframes advent-fall {
  to {
    transform: translateY(110vh) rotate(360deg);
    opacity: 0;
  }
}