.owl-nav {
  position: absolute;
  bottom: 50%;
  width: 100%;
}
.owl-prev {
  display:block;
  float: left;
  margin-left: -50px;
  width: 50px;
  height: 50px;
}
.owl-next {
  float:right;
  margin-right: -50px;
  display:block;
  height: 50px;
  width: 50px;
}

.card-title { color: #18abd0; }

.card-img-top img { max-height: 70px; max-width: 70px; margin: auto; }