*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Roboto", serif;
  background-color: #ffc6c6;
}

.card-wrapper {
  perspective: 1000px;
  transform: rotate(-90deg);
}

.card {
  width: 180px;
  height: 280px;
  background-color: #fff;
  border: 1px solid;
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 250ms;
  box-shadow: inset 5px 0 10px rgba(0, 0, 0, 0.1);
}

.envelope:hover .card {
  transform: rotateY(-15deg) translateX(90px);
  transition-delay: 1750ms;
}

.card-cover {
  position: absolute;
  inset: 0;
  text-align: center;
  outline: 1px solid #000;
  transform-style: preserve-3d;
  transform-origin: left;
  transition: transform 500ms 0ms;
  z-index: 2;
}

.envelope:hover .card-cover {
  transform: rotateY(-135deg);
  transition-delay: 2250ms;
}

.card-side {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  background-color: #fff;
  display: grid;
  place-items: center;
}

.card-side-secondary {
  background-color: #fff;
  transform: rotateY(180deg);
  box-shadow: inset -5px 0 10px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.card-photos {
  position: relative;
  width: 100%;
  height: 100%;
  padding: 2px;
}

.card-photo {
  position: absolute;
  inset: 2px;
  width: calc(100% - 4px);
  height: calc(100% - 4px);
  object-fit: contain;
  opacity: 0;
  transition: opacity 400ms ease;
}

.card-photo.active {
  opacity: 1;
}

.card-title {
  position: relative;
  font-weight: 300;
  text-align: center;
  user-select: none;
}

.card-title span {
  display: block;
}

.card-title-secondary {
  font-size: 16px;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.card-title-main {
  font-family: "Petemoss", serif;
  font-size: 64px;
  font-weight: 400;
}

.card-title-apostrophe {
  position: absolute;
  top: 34px;
  right: 8px;
  font-size: 8px;
}

.card-body {
  font-family: "Shantell Sans", serif;
  padding: 14px;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.card-pages {
  flex: 1;
  position: relative;
}

.card-page {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateX(20px);
  transition:
    opacity 300ms ease,
    transform 300ms ease;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card-page.active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.card-page.exit-left {
  opacity: 0;
  transform: translateX(-20px);
}

.card-body p {
  font-size: 10px;
  font-weight: 300;
  line-height: 1.5;
}
.card-body p + p {
  margin-top: 10px;
}

.card-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding-top: 6px;
}

.card-nav-btn {
  background: none;
  border: 1px solid #e0a0a0;
  border-radius: 50%;
  width: 22px;
  height: 22px;
  font-size: 14px;
  line-height: 1;
  color: #c97878;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background-color 200ms,
    color 200ms,
    opacity 200ms;
  padding: 0;
}

.card-nav-btn:hover {
  background-color: #ffc6c6;
  color: #a04040;
}

.card-nav-btn.hidden {
  opacity: 0;
  pointer-events: none;
}

.card-nav-dots {
  display: flex;
  gap: 5px;
}

.card-nav-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: #e0c0c0;
  transition: background-color 200ms;
}

.card-nav-dot.active {
  background-color: #c97878;
}

.envelope {
  width: 300px;
  height: 200px;
  background-color: #fff;
  display: grid;
  place-content: center;
  cursor: pointer;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 1px #000;
}

.envelope::after {
  content: "";
  position: absolute;
  inset: 0;
  border-top: 75px solid transparent;
  border-right: 150px solid white;
  border-bottom: 125px solid white;
  border-left: 150px solid white;
}

.envelope:hover .card-wrapper {
  animation: show-card 1000ms 600ms forwards;
}

.envelope:not(:hover) .card-wrapper {
  animation: hide-card 1000ms forwards;
}

@keyframes show-card {
  50% {
    transform: translateY(-75%) rotate(-90deg);
    z-index: -1;
  }

  100% {
    transform: translateY(0) rotate(0deg);
    z-index: 10;
  }
}

@keyframes hide-card {
  0% {
    z-index: 10;
    transform: rotate(0deg);
  }

  50% {
    transform: translateY(-75%) rotate(-90deg);
    z-index: -1;
  }

  100% {
    transform: translateY(0) rotate(-90deg);
  }
}

.envelope-lid {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.envelope-lid::before,
.envelope-lid::after {
  content: "";
  position: absolute;
  top: 0;
  width: 1px;
  height: calc(100% - 31.85px);
  background-color: #000;
}

.envelope-lid::before {
  left: 0;
  transform: rotate(-63.1deg);
  transform-origin: top left;
}

.envelope-lid::after {
  right: 0;
  transform: rotate(63.1deg);
  transform-origin: top right;
}

.envelope-lid-secondary {
  background-color: #fff;
  clip-path: polygon(50% 38%, 0 0, 100% 0);
  transition: transform 500ms 1000ms;
  transform-origin: top;
}

.envelope:hover .envelope-lid-secondary {
  transform: rotateX(180deg);
  transition-delay: 100ms;
  animation: open-lid-stacking 500ms forwards;
}

.envelope:not(:hover) .envelope-lid-secondary {
  animation: close-lid-stacking 1250ms forwards;
}

@keyframes open-lid-stacking {
  50% {
    z-index: 1;
  }

  100% {
    z-index: -1;
  }
}

@keyframes close-lid-stacking {
  0%,
  50% {
    z-index: -2;
  }

  100% {
    z-index: 1;
  }
}

.heart-seal {
  position: absolute;
  top: 37%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 32px;
  background-image: url("./photos/Seal.png");
  background-size: cover;
  background-repeat: no-repeat;
  z-index: 2;
  opacity: 1;
  transition: opacity 2s ease;
  animation: heartbeat 0.476s ease-in-out infinite;
}

@keyframes heartbeat {
  0% {
    transform: translate(-50%, -50%) scale(1);
  }
  35% {
    transform: translate(-50%, -50%) scale(1.15);
  }
  70% {
    transform: translate(-50%, -50%) scale(1);
  }
}