:root {
  color-scheme: dark;
  --stage-width: min(100vw, 133.333333vh);
  --stage-height: min(100vh, 75vw);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #000;
  color: #fff;
}

body {
  font-family: Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

#viewer {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: #000;
  cursor: none;
}

body.show-cursor #viewer {
  cursor: default;
}

#stage {
  position: relative;
  width: var(--stage-width);
  height: var(--stage-height);
  overflow: hidden;
  background: #000;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.025);
}

#stage.full-bleed {
  width: 100vw;
  height: 100vh;
  box-shadow: none;
}

#stage.borderless {
  box-shadow: none;
}

#stage.borderless::after {
  position: absolute;
  z-index: 100;
  inset: 0;
  border: 2px solid #000;
  content: "";
  pointer-events: none;
}

#content,
#content > img,
#content > video,
#content > .image-sequence,
#content > iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#content {
  z-index: 1;
}

#content > img,
#content > video {
  display: block;
  object-fit: contain;
  background: #000;
}

.image-sequence {
  overflow: hidden;
  background: #000;
}

.image-sequence > img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
}

.image-sequence > img.active {
  opacity: 1;
}

#stage.k-splitting-overflow {
  overflow: visible;
}

#k-splitting-overflow-glow {
  position: absolute;
  z-index: 0;
  top: 0;
  left: -10%;
  width: 120%;
  height: 100%;
  opacity: 0;
  background: radial-gradient(
    ellipse 6.375% 5% at 13.375% 53.4%,
    rgba(234, 0, 217, 0.45) 0%,
    rgba(234, 0, 217, 0.22) 45%,
    rgba(234, 0, 217, 0) 100%
  );
  pointer-events: none;
}

#k-splitting-overflow-glow.active {
  opacity: 1;
}

#content > iframe {
  border: 0;
  background: #000;
}

#step-overlay {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: none;
  pointer-events: none;
}

#step-overlay.active {
  display: block;
}

#step-overlay > img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

#step-overlay > img.awaiting-video-end {
  display: none;
}

#legacy-footer-mask {
  position: absolute;
  z-index: 4;
  right: 0;
  bottom: 0;
  display: none;
  width: 20%;
  height: 8%;
  background: #000;
  pointer-events: none;
}

#legacy-footer-mask.active {
  display: block;
}

#stage.full-bleed #legacy-footer-mask {
  right: calc((100% - var(--stage-width)) / 2);
  bottom: calc((100% - var(--stage-height)) / 2);
  width: calc(var(--stage-width) * 0.2);
  height: calc(var(--stage-height) * 0.08);
}

#footer-layer {
  position: absolute;
  z-index: 5;
  top: 50%;
  left: 50%;
  width: var(--stage-width);
  height: var(--stage-height);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

#footer-overlay {
  position: absolute;
  right: max(8px, 1.1%);
  bottom: max(7px, 1.29%);
  display: none;
  width: auto;
  height: clamp(14px, 1.85%, 23px);
  pointer-events: none;
}

#footer-overlay.active {
  display: block;
}

#footer-overlay.black {
  filter: brightness(0);
}

#loading {
  position: absolute;
  z-index: 10;
  inset: 0;
  display: none;
  place-items: center;
  background: #000;
  color: rgba(255, 255, 255, 0.65);
  font-size: clamp(16px, 2vw, 30px);
}

#loading.active {
  display: grid;
}

#counter {
  position: fixed;
  z-index: 20;
  right: 18px;
  top: 16px;
  display: none;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.72);
  color: rgba(255, 255, 255, 0.7);
  font: 14px/1.15 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  pointer-events: none;
}

body.show-counter #counter {
  display: block;
}

#help {
  position: fixed;
  z-index: 30;
  left: 50%;
  bottom: 28px;
  display: none;
  min-width: min(620px, calc(100vw - 40px));
  transform: translateX(-50%);
  padding: 18px 22px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  background: rgba(8, 8, 12, 0.94);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
}

#help.active {
  display: block;
}

#help p {
  margin: 5px 0;
}

kbd {
  display: inline-block;
  min-width: 1.7em;
  padding: 2px 5px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font: inherit;
  text-align: center;
}

@media print {
  #counter,
  #help,
  #loading {
    display: none !important;
  }
}