* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  padding: 15px;
}
.hide {
  display: none;
  transition: color 500ms;
}
.show {
  display: inline-block;
  transition: color 500ms;
}
#sides {
  margin: 0;
}
#left {
  float: left;
  width: 25%;
}
#right {
  float: left;
  width: 75%;
}

.logocontainer {
  text-align: left;
  margin: 24px 0px 12px 10px;
}

#game {
  width: 600px;
  height: 600px;
  margin: auto;
  display: flex;
  flex-wrap: wrap;
}
.card {
  height: calc(100% / 5 - 5px);
  width: calc(100% / 5 - 5px);
  margin: 10px;
  position: relative;
  transform: scale(1);
  transform-style: preserve-3d;
  transition: transform 0.5s;
}
.card:active {
  transform: scale(0.97);
  transition: transform 0.2s;
}
.card:hover {
  cursor: pointer;
}
.card.flip {
  transform: rotateY(180deg);
}
.card.shake {
  animation: shake 0.45s ease-in-out;
}
@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-13px);
  }
  40% {
    transform: translateX(13px);
  }
  60% {
    transform: translateX(-8px);
  }
  80% {
    transform: translateX(8px);
  }
}
.front-face {
  width: 100%;
  height: 100%;
  padding: 30px;
  position: absolute;
  border-radius: 5px;
  background: #242424;
  -webkit-backface-visibility: hidden;
  transform: rotateY(180deg);
}
.back-face {
  width: 100%;
  height: 100%;
  padding: 30px;
  position: absolute;
  border-radius: 5px;
  background: #404040;
  -webkit-backface-visibility: hidden;
}

.details button {
  cursor: pointer;
  font-size: 14px;
  color: #4b4b4b;
  border-radius: 4px;
  padding: 4px 11px;
  background: #fff;
  border: 2px solid #4b4b4b;
  transition: 0.3s ease;
  position: relative;
}
.details button:hover {
  color: #fff;
  background: #4b4b4b;
}