.container-cards {
  display: flex; 
  flex-wrap: wrap;
  flex-direction: row; 
  justify-content: center;
}

.card {
  display: inline-flex;
  align-items: stretch;
  justify-content: space-evenly;
  flex-grow: 1;
  text-align: left;
  vertical-align: top;
  width: 100%; 
  max-width: 20rem;
  color: #3d3852;
  margin: 0 1.125rem 2.5rem;
  background: #fff;
  transition: all 250ms;
  box-shadow: 0 0 1.25rem #ccc;
  border: 1px solid #eee;
}

.card:hover {
  box-shadow: 0 0 1.25rem #666;
  background: #f2f6f9;
  border-color: #aaa;
  transform: translateY(-10px);
}