.carousel .carousel-item {
  height: 500px;
}
.carousel .carousel-item > *:first-child {
  background-position: 50%;
  background-repeat: no-repeat;
  background-size: cover;
  height: inherit;
}
#demo-carousel {
  box-shadow: 0 0 10px 5px rgba(0, 0, 0, 0.2);
  margin-top: 1em;
  margin-bottom: 1em;
  border-radius: 30px !important;
  z-index: 2;
}
.carousel-inner {
  border-radius: 30px !important;
}