body {
  color: #fff;
  font-family: Sans-serif;
}

.box {
  background: #FC466B;
  border-radius: 5px;
  height: 100px;
  left: 30%;
  line-height: 100px; /* Same as Div Height to make text appear in the middle*/
  position: absolute;
  text-align: center;
  transition: background 1s linear, border-radius 0.5s ease-out 0.5s;
  width: 100px;
}

.box-hover:hover {
  background: #3F5EFB;
}

.box-border {
  left: 50%;
  background: #3F5EFB;
}

.box-border:hover {
  border-radius: 50%;
}

button {
  background: #61dafb;
  border: none;
  /*<offset-x><offset-y><blur-radius>*/
  box-shadow: 0 5px 0 #B0C5CB;
  color: #333;
  font-family: inherit;
  font-weight: bold;
  left: 41%;
  outline: 0;
  padding: 12px 20px;
  position: absolute;
  top: 20%;
  transition: all .1s linear;
}

button:active {
  box-shadow: 0 2px 0 #B0C5CB;
  transform:  translateY(3px);
}