.card {
    /* Add shadows to create the "card" effect */
    margin-bottom: 4px;
    box-shadow: 0 4px 8px 0 rgba(0,0,0,0.4);
    transition: 0.3s;
    margin-bottom: 16px;
    overflow: hidden;
  }
  
.card .card-header {
    padding-top: 6px;
    padding-bottom: 4px;
    background-color: lightgray;
}

.card .card-content {
    margin-top: 3rem;
}

.card .card-footer {
  border: none;
  outline: 0;
  display: inline-block;
  padding: 8px;
  color: white;
  background-color: #000;
  text-align: center;
  cursor: pointer;
  width: 100%;
  font-size: 18px;
}

  /* On mouse-over, add a deeper shadow */
  .card:hover {
    box-shadow: 0 8px 16px 0 rgba(0,0,0,0.4);
  }