html.handout #handout-container {
  margin: auto;
  overflow: auto;
  touch-action: pan-x pan-y pinch-zoom;
}

/* hide standard reveal element in handout mode, since it consumes space
when switching to last slide through the menu */
html.handout :not(#handout-container).reveal {
  display: none;
}

html.handout .reveal .slides {
  display: block;
  width: var(--slide-width);
  transform: scale(var(--scale-factor));
  transform-origin: top center;
  translate: -50% 0;
  left: 50%;
  margin: 0;
}

html.handout .reveal .slides section {
  position: static;
  opacity: 1;
  pointer-events: auto;
  transition: none !important;
  transform: none !important;
  height: unset !important;
}

/* visualize central slide (DEBUG ONLY) */
html.handout .reveal .slides section.current {
  outline: 2px solid var(--primary-color);
}

html.handout .reveal .slides section .handoutBackground {
  grid-area: common;
  width: var(--slide-width);
  height: var(--slide-height);
  background-position: 50% 50%;
  background-repeat: no-repeat;
  background-size: contain;
  object-fit: contain;
  z-index: -1;
}

/* pass through mouse events to control video or interactive iframes */
html.handout .reveal .slides section[data-background-video] > .decker,
html.handout
  .reveal
  .slides
  section[data-background-interactive="1"]
  > .decker {
  pointer-events: none;
}

html.handout .reveal .slides section.stack {
  display: block !important;
}

html.handout .reveal .slides section:not(.stack) {
  display: grid !important;
  grid-template-areas: "common";
  min-height: var(--slide-height);
  align-items: start;
  border-bottom: 1px solid var(--shade3);
}

html.handout .reveal .slides section .decker {
  grid-area: common;
  min-height: var(--slide-height);
  width: var(--slide-width);
  height: unset;
}

html.handout .reveal .slides section .whiteboard {
  grid-area: common;
  position: relative;
}

html.handout .reveal .backgrounds {
  display: none;
}

html.handout .reveal .pause-overlay {
  display: none;
}

html.handout .reveal .stack > p {
  display: block;
}

html.handout .reveal .stack span.media {
  display: block;
}

html.handout .reveal .slides section .stack {
  counter-reset: stack-item;
}

html.handout .reveal .slides section .stack .fragment {
  position: relative;
  border: 1px solid var(--foreground-color);
  margin: 0.5rem;
}

html.handout .reveal .slides section .stack .fragment img {
  border: none;
}

html.handout .reveal .slides section .stack .fragment::before {
  counter-increment: stack-item;
  content: counter(stack-item);
  color: var(--foreground-color);
  background-color: var(--background-color);
  position: absolute;
  font-size: 0.7em;
  top: 0;
  left: 0;
  width: 1.5em;
  height: 1.5em;
  text-align: center;
  vertical-align: middle;
  z-index: 2;
}

html.handout .reveal .slides section .stack .fragment:not(.current-fragment) {
  visibility: visible;
}

html.handout .decker-anchor #explain-play,
html.handout .decker-anchor .open-button {
  display: none;
}
html .decker-anchor #handout-plus,
html .decker-anchor #handout-minus {
  display: none;
}
html.handout .decker-anchor #handout-plus,
html.handout .decker-anchor #handout-minus {
  display: inline-block;
}

/* animated button */

#menu-handout-button {
  position: relative;
  --dwidth: var(--icon-size);
  --dheight: calc(var(--dwidth) * 9 / 16);
  --dcenterx: calc((100% / 2) - (0.5 * var(--dwidth)));
  --dcentery: calc((100% / 2) - (0.5 * var(--dheight)));
  --dhspace: calc(100% - 2 * var(--dheight));
}

#menu-handout-button div {
  box-sizing: content-box;
  background-color: var(--menu-header-text-color);
  box-shadow: 0.125rem 0.125rem var(--menu-header-background-color);
  border-radius: 0.15rem;
  width: var(--dwidth);
  height: var(--dheight);
  transition: top 0.3s ease-in-out, left 0.3s ease-in-out;
}

#menu-handout-button:hover div {
  background-color: var(--accent3);
}

#menu-handout-button .top-anim-rect {
  position: absolute;
  top: calc(var(--dhspace) / 3);
  left: var(--dcenterx);
  z-index: 512;
}

#menu-handout-button .bottom-anim-rect {
  position: absolute;
  top: calc(var(--dhspace) / 3 * 2 + var(--dheight));
  left: var(--dcenterx);
  z-index: 511;
}

.handout #menu-handout-button .top-anim-rect {
  position: absolute;
  top: calc(var(--dcentery) - 0.3 * var(--dheight));
  left: calc(var(--dcenterx) - 0.2 * var(--dwidth));
  z-index: 512;
}

.handout #menu-handout-button .bottom-anim-rect {
  position: absolute;
  top: calc(var(--dcentery) + 0.3 * var(--dheight));
  left: calc(var(--dcenterx) + 0.2 * var(--dwidth));
  z-index: 511;
}