lightbox.css

body:not(.glightbox-mobile) div.gslide div.gslide-description,
body:not(.glightbox-mobile) div.gslide-description .gslide-title,
body:not(.glightbox-mobile) div.gslide-description .gslide-desc {
  color: var(--quarto-body-color);
  background-color: var(--quarto-body-bg);
}

body:not(.glightbox-mobile) div.gslide-media {
  background-color: var(--quarto-body-bg);
}

.goverlay {
  background: rgba(0, 0, 0, 0.7);
}

div.gslide-description .gslide-title {
  margin-top: 0.25em;
  margin-bottom: 0.25em;
  font-weight: 500;
  font-family: inherit;
}

div.gslide-description .gslide-desc {
  padding-bottom: 0.5em;
  font-family: inherit;
}