body{
  background: #f8f8f8;
}

#centered-container{
  text-align: center;
}

.item{
  border:1px solid black;
  display: inline-block;
  padding: 1em;
  margin: 1em;
  background: #ffffff;
  -webkit-box-shadow: 0 8px 6px -6px black;
  -moz-box-shadow: 0 8px 6px -6px black;
  box-shadow: 0 8px 6px -6px black;
}