:root {
  --text-horizontal-align-layout-cover: left;
  --text-vertical-align-layout-cover: center;
  --text-horizontal-align-layout-title: left;
  --text-vertical-align-layout-title: center;
  --text-horizontal-align-layout-section: left;
  --text-vertical-align-layout-section: center;
  --text-horizontal-align-layout-default: left;
  --text-vertical-align-layout-default: center;
  --text-horizontal-align-layout-caption: left;
  --text-vertical-align-layout-split: center;
  --text-vertical-align-layout-3-column: center;
}

section.light.has-light-background figure.default-image {
  filter: invert(1);
  opacity: 0.5;
}
section.light.has-dark-background figure.default-image {
  filter: initial;
  opacity: 0.6;
}

section.dark.has-light-background figure.default-image {
  filter: invert(1);
  opacity: 0.5;
}
section.dark.has-dark-background figure.default-image {
  filter: initial;
  opacity: 0.6;
}

/* Web sharing */
.presentation-display-mode-handout .content.handout figure.default-image img {
  filter: invert(1);
  opacity: 0.5;
}
.presentation-display-mode-handout.dark .content.handout figure.default-image img {
  filter: initial;
  opacity: 0.6;
}