.center{
    display: block;
    margin-left:auto;
    margin-right: auto;
}
.card {
  box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2);
  transition: 0.3s;
  width: 40%;
}

.card:hover {
  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2);
}

.container {
  padding: 2px 16px;
}