* {
  box-sizing: border-box; }

body {
  padding: 0;
  margin: 0;
  font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #fff; 
  background-color: #1f8c65;
}
#container{
   position: absolute;
   top: 50%;
   margin-top: -200px;/* half of #content height*/
   left: 0;
   width: 100%;
}
#content {
   width: 624px;
   margin-left: auto;
   margin-right: auto;
   height: 395px;
   text-align: center;
}