body {
    background-color: #ddd;
}

form {
  overflow: auto;
}

.container {
    position: absolute;
    left: 50%;
    top: 15%;
    transform: translate(-50%, 0);
    perspective: 1000px;
    width: 340px;
    height: 400px;
}

#cube {
    width: 100%;
    height: 100%;
    position: absolute;
    transform-style: preserve-3d;
}

#cube figure { 
    -webkit-backface-visibility: hidden; /* Safari */
    backface-visibility: hidden;
    margin: 0;
    width: 340px;
    height: 400px;
    display: block;
    position: absolute;
}

#cube .front {
    transform: rotateY(0deg) translateZ(187.5px);
}

#cube .left {
    transform: rotateY(-90deg) translateZ(165px) translateX(22.5px);
}

#cube .bottom {
    transform: rotateX(-90deg) translateZ(187.5px);
}

#cube {
    transform: translateZ(-165px);
}

#cube.show-front {
    transform: translateZ(-165px) rotateY(0deg);
}

#cube.show-left {
    transform: translateX(-22.5px) translateZ(-165px) rotateY(90deg);
}

#cube.show-bottom {
  transform: translateZ(-165px) rotateX(90deg);
}

#cube {
    transition: transform .4s;
}

.mdl-card {
    width: 340px;
    height: 400px;
}

.mdl-card__title .mdl-button--icon {
    height: 28px;
    width: 28px;
    min-width: 28px;
}

.mdl-textfield__label {
  color: rgba(0, 0, 0, 0.5);
}

a:hover {
    cursor: pointer;
}