#carousel-t .carousel-item {
  position: relative;
  min-height: 100vh;
}

#carousel-t .carousel-item::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 1;
}

#carousel-t .testimonial-content {
  position: relative;
  z-index: 2;
}