:root {
  --color-door-closed: #386641;
  --color-door-open: #7b1b1b;
  --color-door-christmas: #ad1111;
}

/* general styles */
#main-wrapper {
  background-color: #000000;
  color: #ffffff;
}

#main-wrapper h1,
#main-wrapper h2,
#main-wrapper h3,
#main-wrapper h4,
#main-wrapper h5,
#main-wrapper h6,
#main-wrapper .h1,
#main-wrapper .h2,
#main-wrapper .h3,
#main-wrapper .h4,
#main-wrapper .h5,
#main-wrapper .h6 {
  color: #ffffff;
}

#main-wrapper .highlight-red {
  background-color: #e21838;
  color: #ffffff;
  padding: 0 0.5rem;
}

#snow-canvas {
  inset: 0;
  pointer-events: none;
  position: fixed;
}

#advent-hero,
#advent-intro,
#advent-calendar,
.advent-calendar,
.opc-default-content > .opc-Container {
  margin: 2rem auto;
  padding: 0 1rem;
}

@media (min-width: 768px) {
  #advent-hero,
  #advent-intro,
  #advent-calendar,
  .advent-calendar,
  .opc-default-content > .opc-Container {
    margin-bottom: 3.5rem;
    margin-top: 3.5rem;
  }
}

/* hero section */
#advent-hero {
  padding: 0;
  position: relative;
}

#advent-hero > div {
  align-items: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 400px;
  text-align: center;
}

#advent-hero .opc-area {
  width: 100%;
}

/* intro section */
#advent-intro h2 {
  text-align: center;
}

#advent-intro p {
  margin: 0 auto;
  max-width: 960px;
}

/* calendar section */
.advent-calendar {
  position: relative;
}

.advent-calendar .icon-advent {
  animation: tilt-left-back 4s ease-in-out infinite alternate;
  position: absolute;
  transition: transform 0.2s ease;
  z-index: 10;
  height: 72px;
  width: 72px;
}

@media (min-width: 1025px) {
  .advent-calendar .icon-advent {
    height: 100px;
    width: 100px;
  }
}

@keyframes tilt-left-back {
  0% {
    transform: rotate(0deg);
  }
  40% {
    transform: rotate(-20deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

.advent-calendar .icon-christmas-ball {
  top: 49%;
  left: -10px;
}

@media (min-width: 768px) {
  .advent-calendar .icon-christmas-ball {
    top: 46%;
    left: 0;
  }
}

@media (min-width: 1025px) {
  .advent-calendar .icon-christmas-ball {
    top: 46%;
    left: -24px;
  }
}

.advent-calendar .icon-sugarcane {
  animation-duration: 3s;
  right: -12px;
  bottom: -22px;
}

@media (min-width: 768px) {
  .advent-calendar .icon-sugarcane {
    right: 0;
    bottom: 0;
  }
}

@media (min-width: 1025px) {
  .advent-calendar .icon-sugarcane {
    right: -24px;
    bottom: -32px;
  }
}

.advent-calendar .icon-mistletoe {
  animation-duration: 2s;
  right: -8px;
  top: 14%;
}

@media (min-width: 768px) {
  .advent-calendar .icon-mistletoe {
    right: 0;
    top: 12%;
  }
}

@media (min-width: 1025px) {
  .advent-calendar .icon-mistletoe {
    right: -24px;
    top: 11%;
  }
}

.advent-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, 1fr);
  position: relative;
}

@media (min-width: 768px) {
  .advent-grid {
    gap: 2rem;
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1025px) {
  .advent-grid {
    gap: 3rem;
  }
}

.advent-door {
  transform-style: preserve-3d;
  background: var(--color-door-closed);
  padding-top: 100%;
  perspective: 1200px;
  position: relative;
  user-select: none;
}

.advent-door[data-day='24'],
.advent-door[data-day='24'] .door-front {
  background: var(--color-door-christmas);
}

.advent-door .door-inner {
  inset: 0;
  overflow: hidden;
  position: absolute;
}

.advent-door .door-back {
  inset: 0;
  display: block;
  opacity: 0;
  pointer-events: none;
  position: absolute;
  transform: scale(1.02);
  transition: opacity 1s ease, transform 1s ease;
  z-index: 1;
}

.advent-door .door-back img {
  display: block;
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.advent-door .door-front {
  transform-style: preserve-3d;
  backface-visibility: hidden;
  border: none;
  bottom: 0;
  cursor: default;
  flex-grow: 1;
  position: absolute;
  top: 0;
  transform-origin: left center;
  transition: transform 4s;
  width: 50%;
  z-index: 2;
}

.advent-door .door-front-left {
  left: 0;
  transform-origin: left center;
}

.advent-door .door-front-right {
  right: 0;
  transform-origin: right center;
}

.advent-door .door-front {
  background: var(--color-door-closed);
}

.advent-door .door-front::before {
  transform-style: preserve-3d;
  bottom: 0;
  content: '';
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
  transform: rotateY(180deg);
}

.advent-door.is-today .door-front-left::before {
  box-shadow: 0 0 10px black;
}

.advent-door.is-today .door-front-right::before {
  box-shadow: 0 0 10px black !important;
}

.advent-door .door-label-wrap {
  inset: 0;
  align-items: center;
  display: flex;
  justify-content: center;
  pointer-events: none;
  position: absolute;
  transition: opacity 1s ease, transform 1s ease;
  z-index: 3;
}

.advent-door .door-label {
  color: #ffffff;
  font-family: 'Work Sans', sans-serif;
  font-size: 2rem;
  font-weight: 700;
}

@media (min-width: 768px) {
  .advent-door .door-label {
    font-size: 4rem;
  }
}

@media (min-width: 1025px) {
  .advent-door .door-label {
    font-size: 5rem;
  }
}

.advent-door.is-today .door-label {
  text-shadow: 0 0 20px #ffffff;
}

.advent-door .door-back .door-label {
  aspect-ratio: 1;
  align-items: center;
  background: white;
  bottom: 0;
  color: black;
  display: flex;
  font-size: 1rem;
  justify-content: center;
  left: 0;
  line-height: normal;
  min-height: 24px;
  position: absolute;
}

@media (min-width: 768px) {
  .advent-door .door-back .door-label {
    font-size: 2rem;
    min-height: 40px;
  }
}

.advent-door.is-open:not(.is-today) {
  filter: brightness(0.5);
}

.advent-door.is-today {
  box-shadow: 0px 0px 20px 4px #ffffff;
  animation: glow-pulse 6s ease-in-out infinite;
}

@keyframes glow-pulse {
  50% {
    box-shadow: 0 0 14px rgba(0, 0, 0, 0.35), 0 0 28px rgba(255, 255, 255, 1);
  }
}

.advent-door.is-today .door-front {
  cursor: pointer;
  width: 38%;
}

.advent-door.is-today .door-front-left {
  transform: rotate3d(0, 1, 0, -20deg);
}

.advent-door.is-today .door-front-right {
  transform: rotate3d(0, 1, 0, 20deg);
}

.advent-door.is-today .door-back {
  opacity: 0.35;
}

.advent-door.is-open .door-front-left {
  pointer-events: none;
  transform: rotate3d(0, 1, 0, -130deg);
}

.advent-door.is-open .door-front-right {
  pointer-events: none;
  transform: rotate3d(0, 1, 0, 130deg);
}

.advent-door.is-open .door-back {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
}

.advent-door.is-open .door-label-wrap {
  opacity: 0;
  transform: scale(0.9);
}

.advent-door.is-future .door-front {
  box-shadow: none;
  cursor: default;
}

.advent-door.is-future .door-front-left,
.advent-door.is-future .door-front-right {
  pointer-events: none;
}