body {
  background: #18222F;
}

.wrapper {
  position: absolute;
  width: 400px;
  height: 400px;
  margin: auto;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
  -webkit-flex-direction: row;
      -ms-flex-direction: row;
          flex-direction: row;
}

.container {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
      -ms-flex: 1;
          flex: 1;
  padding: 0 20px;
}