.container {
  width: 100%;
  margin: 1rem auto;
}
form {
  width:100%;
  box-sizing:border-box;
  background-color:white;
  box-shadow: 0px 1px 2px 1px rgba(0, 0, 0, 0.4);
  text-align:center;
  position:relative;
  border-radius:2px;
}

form > div {
  color:white;
  padding-top:24px;
  display:block;
  position:absolute;
  top:-4px;
  left:-4px;
  bottom:-4px;
  width:calc(33.33% + 8px);
  background-color: rgba(50, 150, 255,1);
  border-radius:2px;
  box-shadow: 0px 1px 2px 1px rgba(0, 0, 0, 0.4);
  z-index:1;
  pointer-events:none;
  transition:transform 0.3s;
}

form::after {
  content:"";
  display:block;
  clear:both;
}

form label {
  float:left;
  width:calc(33.333% - 1px);
  position:relative;
  padding:0px 0px 20px;
  overflow:hidden;
  border-left:solid 1px rgba(0,0,0,0.2);
  transition:color 0.3s;
  cursor:pointer;
  -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
}

form label:first-child {
  border-left:none;
}

form label input {
  position:absolute;
  top:-200%;
}

form label div {
  z-index: 5;
  position: absolute;
  width: 100%;
}

form label.selected {
  color:white;
}