MediaWiki:EnsSpeDemo.css

.phone {
    position: relative;
    width: 180px;
    height: 320px;
    margin: auto;
    border: 8px rgb(75, 75, 75) solid;
    border-top-width: 30px;
    border-bottom-width: 30px;
    border-radius: 18px;
  }

.phone:before {
    content: '';
    display: block;
    width: 30px;
    height: 5px;
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #333;
    border-radius: 10px;
  }

.phone:after {
    content: '';
    display: block;
    width: 20px;
    height: 20px;
    position: absolute;
    left: 50%;
    bottom: -35px;
    transform: translate(-50%, -50%);
    background: #333;
    border-radius: 50%;
  }

.phone .content {
    width: 180px;
    height: 320px;
    background: white;
  }

.demo-third {
  width: 33%;
  float: left;
  }

.demo-left {
  left: 0;
  }

.demo-right {
  right: 0;
  }