* {
  box-sizing: border-box;
}
html,
body {
  background: #282828;
  margin: 0;
  padding: 0;
  height: 100%;
}
body {
  padding: 0;
}
.card_container {
  position: relative;
  height: 100%;
}
.card {
  position: relative;
  top: 50%;
  transform: translate(0, -50%);
  margin: 0 2em;
}
.card .front,
.card .back {
  flex-direction: column;
  height: 100%;
  background: #b8d7cf;
  border: 1px solid #000;
  padding: 1em;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  font-size: 3em;
}
.card .front icon,
.card .back icon,
.card .front .text_container,
.card .back .text_container {
  display: flex;
  justify-content: center;
  height: 50%;
}
.card .front .icon,
.card .back .icon {
  text-align: center;
}
.card .front .icon img,
.card .back .icon img {
  max-width: 70%;
  max-height: 90%;
  margin: auto;
}
.card .front .text_container,
.card .back .text_container {
  padding-top: 1em;
  text-align: center;
  font-family: Verdana, sans-serif;
  user-select: none;
}