.ui-button {
  background:#3887BE;
  color:#FFF;
  display:block;
  position:relative;
  float: left;
  width:160px;
  z-index:100;
  text-align:center;
  padding:10px;
  border:2px solid rgba(0,0,0,0.4);
  border-radius:3px;
  }
  .ui-button:hover {
    background:#3074a4;
    color:#fff;
    }

#nav {
    line-height:30px;
    position: absolute;
    top: 0%;
    left: 10%;
    height:10vh;
    width:inherit;
    float:left;
    padding:5px; 
    clear: none;
    z-index: 1;
    visibility: hidden;

}

#content {
      width: 50%;
      padding-top: 15%;
      margin: 0 auto;
      z-index: 1;
      position: relative;
      clear: none;
    }

body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }