@import 'https://fonts.googleapis.com/css?family=Open+Sans';



#clock{
  align-items: center;
  -webkit-align-items: center;
  display: flex;
  display: -webkit-flex;
  height: 130px;
  justify-content: space-around;
  -webkit-justify-content: space-around;
  left: calc(50% - 300px);
  position: absolute;
  top: calc(50% - 65px);
  width: 200px;
}
.unit{
  background: linear-gradient(#aaa, #777);
  border-radius: 15px;
  box-shadow: 0 2px 2px #444;
  color: #fff;
  font-family: "Open Sans", sans-serif;
  font-size: 2em;
  height: 31%;
  line-height: 44px;
  margin: 0 4px;
  text-align: center;
  text-shadow: 0 2px 2px #666;
  width: 45%;
}