squidgame.css

* {
  padding: 0;
  margin: 0;
}

body {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #000000;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='186' height='186' viewBox='0 0 120 120'%3E%3Cpolygon fill='%23434343' fill-opacity='0.12' points='120 0 120 60 90 30 60 0 0 0 0 0 60 60 0 120 60 120 90 90 120 60 120 0'/%3E%3C/svg%3E");
}

.card-outer:hover .card {
  transform: rotateY(180deg);
}
.card-outer:hover .card .card-front {
  visibility: visible;
  opacity: 0;
}
.card-outer:hover .card .card-back {
  visibility: visible;
  opacity: 1;
}

.card {
  perspective: 1000px;
  width: 500px;
  height: 280px;
  border-radius: 10px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #704b00;
  background-image: url("https://cdn.discordapp.com/attachments/482233537026719746/896844303446462486/cardboard.png");
  transition: transform 0.7s;
  transform-style: preserve-3d;
}

.card-front {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  /* Safari */
  backface-visibility: hidden;
  transition: visibility 0s, opacity 0.5s ease-in;
}

.card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0s, opacity 0.5s ease-in;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
}

.card-front {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}
.card-front .circle {
  border: 12px solid #000;
  width: 75px;
  height: 75px;
  border-radius: 999px;
}
.card-front .square {
  border: 12px solid #000;
  width: 75px;
  height: 75px;
}

.card-back {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000000;
  transform: rotateY(180deg);
  visibility: hidden;
}