.carousel-control-next, .carousel-control-prev {
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 15%;
  padding: 0;
  color: black;
  text-align: center;
  background: 0 0;
  border: 0;
  opacity: .5;
  transition: opacity .15s ease;
  fill: green;
}

.carousel-control-next:focus, .carousel-control-next:hover, .carousel-control-prev:focus, .carousel-control-prev:hover {
  color: black;
  text-decoration: #000000;
  outline: 0;
  opacity: .9;
  fill: green;
}