.reveal .slides section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.reveal .slides section img {
  width: 100%;       // Ensures that the image is responsive
  height: auto;      // Keeps image aspect ratio intact
  display: block;    // Removes bottom space/gap
}