Body {
  background-color: #000000;
}
.card {
  background-color: #000000;
  color: #FFFFFF;
  width: calc(100%);
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,.1);
  transition: box-shadow .3s ease-in-out;
}

.card:hover {
  box-shadow: 0 0 20px rgba(0,0,0,.2);
}