.big {
  margin-bottom:2em;
    margin-top:2em;

}

.card {
      box-shadow: 0 2px 4px 0 rgba(0,0,0,0.1), 0 3px 6px 0 rgba(0,0,0,0.09);
      padding:1em;
}

.card-section {
  border-radius: 10px;
}

.card-section h3 {
  text-align:center;
}