@import url("https://fonts.googleapis.com/css2?family=Dawning+of+a+New+Day&family=Gaegu&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Yuji+Boku&display=swap");

* {
  padding: 0;
  margin: 0;
}

body {
  background-color: #fcc7d0;
}

.card {
  position: absolute;
  top: 40%;
  left: 35%;
  width: 633px;
  height: 400px;
  transition: 1s;
  transform: translate(-40%, -40%);

  -webkit-perspective: 2000px;
  perspective: 2000px;
}
.card:hover {
  transform: translate(-40%, -40%) rotate(5deg);
}

.card:hover .cover {
  transform: rotateY(-160deg);
}

.cover,
.inside {
  position: absolute;
  height: 100%;
  width: 50%;
  left: 50.2%;
}
.inside {
  background: linear-gradient(to right, #e7e7e7, #fbfbfb 60%);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  left: 50%;
  box-shadow: 1px 5px 20px #e3a8b2;
}
.cover {
  z-index: 1;
  transform-origin: left;
  transition: 2s;

  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
}
.cover-front,
.cover-back {
  position: absolute;
  height: 100%;
  width: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}
.cover-front {
  background-image: url("https://i.ibb.co/tx5DBHc/bday-card-2.jpg");
  background-size: contain;
  background-repeat: no-repeat;
}
.cover-back {
  background: linear-gradient(to left, #d9d9d9, #fbfbfb 35%);
  transform: rotateY(180deg);
  box-shadow: -10px -1px 10px #e3a8b2;
}

.inside h1 {
  position: absolute;
  font-family: "Share Tech Mono", monospace;
  font-size: 10px;
  color: #989898;
  transform: translateY(-30px);
}

.inside p {
  position: absolute;
  line-height: 13px;
  transform: rotate(-10deg);
  padding: 0 20px 0 20px;
  font-family: "Gaegu", cursive;
}

#message {
  margin-top: 130px;
}

.signature {
  margin-top: 200px;
  right: 20px;
  text-align: right;
}

@media (max-width: 600px) {
  .inside p {
    font-size: 8px;
  }
}