div {
    width: 500px;
    height: 400px;
    /*background-color: red;*/

    position: absolute;
    top:0;
    bottom: 0;
    left: 0;
    right: 0;

    margin: auto;
}

.URIinput-box {
  display: inline-block;
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  width: 300px;
  padding: 10px 20px;
  border: 1px solid #b7b7b7;
  -webkit-border-radius: 3px;
  border-radius: 3px;
  font: normal 16px/normal "Times New Roman", Times, serif;
  color: rgba(0,142,198,1);
  -o-text-overflow: clip;
  text-overflow: clip;
  background: rgba(252,252,252,1);
  -webkit-box-shadow: 2px 2px 10px -5px rgba(0,0,0,0.2) inset;
  box-shadow: 2px 2px 10px -5px rgba(0,0,0,0.2) inset;
  text-shadow: 1px 1px 0 rgba(255,255,255,0.66) ;
  -webkit-transition: all 200ms cubic-bezier(0.42, 0, 0.58, 1);
  -moz-transition: all 200ms cubic-bezier(0.42, 0, 0.58, 1);
  -o-transition: all 200ms cubic-bezier(0.42, 0, 0.58, 1);
  transition: all 200ms cubic-bezier(0.42, 0, 0.58, 1);
}

.OPENbutton-css {
  display: inline-block;
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  cursor: pointer;
  padding: 10px 20px;
  border: 1px solid #018dc4;
  -webkit-border-radius: 3px;
  border-radius: 3px;
  font: normal 16px/normal "Times New Roman", Times, serif;
  color: rgba(255,255,255,0.9);
  -o-text-overflow: clip;
  text-overflow: clip;
  background: #0199d9;
  -webkit-box-shadow: 2px 2px 2px 0 rgba(0,0,0,0.2) ;
  box-shadow: 2px 2px 2px 0 rgba(0,0,0,0.2) ;
  text-shadow: -1px -1px 0 rgba(15,73,168,0.66) ;
  -webkit-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  -moz-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  -o-transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
  transition: all 300ms cubic-bezier(0.42, 0, 0.58, 1);
}