* {
	margin: 0;
	padding: 0;
	overflow: hidden;
}

body {
  margin: 0;
  overflow: hidden;
  display:flex;
  height:100vh;
  align-items:center;
  justify-content:center;
}
#container {
  box-sizing: border-box;
  width: 100vmin;
  height: 100vmin;
  margin: 0 auto;
}

#container canvas {
  width: 100%;
  height: 100%;
}

a:visited {
  color: black;
}

.loadingclass {
  position: absolute;
  width: 300px;
  line-height: 200px;
  height: 200px;
  z-index: 15;
  top: 50%;
  left: 50%;
  margin-left: -150px; /* Negative half of width. */
  margin-top: -100px; /* Negative half of height. */
  text-align: center;
  vertical-align: middle;
  background-color: transparent;
  font-family: monospace;
}

#ui {
  display: none;
  position: absolute;
  background: rgba(255, 255, 255, 0.75);
  width: 100%;
  height: 100%;
  text-align: center;
  vertical-align: top; /* this line added in edit */
  -moz-user-select: text;
 -khtml-user-select: text;
 -webkit-user-select: text;
 -ms-user-select: text;
 user-select: text;
 overflow:scroll;
}

#content {
  font-family: monospace;
  font-size: x-large;
  position: absolute;
  top: 30%;
  left: 0;
  right: 0;
  
}

.media:hover {
  text-decoration: underline;
  color: magenta;
  cursor: pointer;
}

.next {

  font-size:medium;

}