* {
  position: relative;
  box-sizing: border-box;
}
h1 { text-align:center;}

html, body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}
body { background-color:#fafafa;}

.container {
  width: 60vw;
  background:#16A085;
  margin: 0 auto;
  padding: 5vw 0;
}

.viewport {
  width: 60vw;
  height: 20vw;
  margin: 5vw auto; /*overflow: hidden;*/
}

.holder {
  font-size: 0;
  height: 100%;
  white-space: nowrap;
  display: inline-block;
}

.item {
  display: inline-block;
  width: 60vw;
  height: 20vw;
  border-radius: 2vw;
}

.item:last-child { margin-right: 0 !important; }

.item i {
  font-size: 6vw;
  color: rgba(0, 0, 0, 0.1);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate3d(-50%, -50%, 0);
}

.viewport.red .item {
  background: #f5dddd;
  margin-right: 2vw;
}

.viewport.green .item {
  background: #ddf5dd;
  width: 29vw;
  margin-right: 2vw;
}

.viewport.blue .item {
  background: #ddddf5;
  width: 18.66vw;
  margin-right: 2vw;
}