/* Full-screen media viewer on a modal <dialog>. */
.viewer {
  --stage-height: calc(100svh - 165px);
  position: fixed;
  inset: 0;
  z-index: 95;
  display: grid;
  grid-template-rows: 58px 1fr 48px;
  width: auto;
  height: auto;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: rgb(10 9 8 / .96);
  color: var(--paper);
  opacity: 0;
  transition: opacity .35s;
  transition: opacity .35s, overlay .35s allow-discrete, display .35s allow-discrete;
}

.viewer:not([open]) {
  display: none;
}

.viewer[open] {
  opacity: 1;
}

@starting-style {
  .viewer[open] {
    opacity: 0;
  }
}

.viewer::backdrop {
  background: transparent;
}

.viewer__head,
.viewer__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3vw;
  font: 10px var(--font-mono);
  letter-spacing: .1em;
}

.viewer__head {
  border-bottom: 1px solid var(--night-line);
}

.viewer__foot {
  border-top: 1px solid var(--night-line);
  color: #908881;
}

.viewer__controls {
  display: flex;
  gap: 18px;
}

.viewer__button {
  padding: 10px;
  border: 0;
  background: none;
  cursor: pointer;
}

.viewer__button:hover {
  color: var(--red);
}

.viewer__stage {
  display: grid;
  place-items: center;
  min-height: 0;
  padding: 3vh 5vw;
}

.viewer__stage img,
.viewer__stage video {
  width: min(100%, calc(var(--stage-height) * var(--ratio, 1)));
  height: auto;
  max-height: var(--stage-height);
  border: 1px solid var(--red);
  background: #000;
  box-shadow: 10px 10px 0 var(--red);
}

@media (max-width: 820px) {
  .viewer {
    --stage-height: calc(100svh - 140px);
    grid-template-rows: 52px 1fr 44px;
  }

  .viewer__stage {
    padding: 2vh 18px;
  }

  .viewer__stage img,
  .viewer__stage video {
    box-shadow: 6px 6px 0 var(--red);
  }
}