* {
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
  /* for touch screen */
  touch-action: none;
}

body {
  overflow: hidden;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  background: rgb(0, 0, 0);
  -webkit-perspective: 1000px;
  perspective: 1000px;
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
}

#drag-container,
#spin-container {
  position: relative;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  margin: auto;
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
  -webkit-transform: rotateX(-10deg);
  transform: rotateX(-10deg);
}

#drag-container img,
#drag-container video {
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  line-height: 200px;
  font-size: 50px;
  text-align: center;
  -webkit-box-shadow: 0 0 8px #fff;
  box-shadow: 0 0 8px #fff;
  -webkit-box-reflect: below 10px
    linear-gradient(transparent, transparent, #0005);
}

#drag-container img:hover,
#drag-container video:hover {
  -webkit-box-shadow: 0 0 15px #fffd;
  box-shadow: 0 0 15px #fffd;
  -webkit-box-reflect: below 10px
    linear-gradient(transparent, transparent, #0007);
}

#drag-container p {
  font-family: Serif;
  position: absolute;
  top: 100%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%) rotateX(90deg);
  transform: translate(-50%, -50%) rotateX(90deg);
  color: #fff;
}

#ground {
  width: 900px;
  height: 900px;
  position: absolute;
  top: 100%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%) rotateX(90deg);
  transform: translate(-50%, -50%) rotateX(90deg);
  background: -webkit-radial-gradient(
    center center,
    farthest-side,
    #9993,
    transparent
  );
}

@-webkit-keyframes spin {
  from {
    -webkit-transform: rotateY(0deg);
    transform: rotateY(0deg);
  }
  to {
    -webkit-transform: rotateY(360deg);
    transform: rotateY(360deg);
  }
}

@keyframes spin {
  from {
    -webkit-transform: rotateY(0deg);
    transform: rotateY(0deg);
  }
  to {
    -webkit-transform: rotateY(360deg);
    transform: rotateY(360deg);
  }
}
@-webkit-keyframes spinRevert {
  from {
    -webkit-transform: rotateY(360deg);
    transform: rotateY(360deg);
  }
  to {
    -webkit-transform: rotateY(0deg);
    transform: rotateY(0deg);
  }
}
@keyframes spinRevert {
  from {
    -webkit-transform: rotateY(360deg);
    transform: rotateY(360deg);
  }
  to {
    -webkit-transform: rotateY(0deg);
    transform: rotateY(0deg);
  }
}