/* film.css — full-screen film player dialog. Script: js/film.js
   Moved from prototype-book/style.css. */

html {
  /* Locking scroll for the film player must not change the page width */
  scrollbar-gutter: stable;
}

html.is-film-open {
  overflow: hidden;
}

.film {
  /* Video height: leave room for the controls below, keep 9:16 within the width */
  --film-h: min(calc(100vh - var(--space-10) - var(--space-9)), calc((100vw - 2 * var(--space-4)) * 16 / 9));
  --film-h: min(calc(100dvh - var(--space-10) - var(--space-9)), calc((100vw - 2 * var(--space-4)) * 16 / 9));
  --film-w: calc(var(--film-h) * 9 / 16);
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: var(--space-4);
  border: 0;
  background: var(--color-backdrop);
  color: var(--color-on-backdrop);
  overscroll-behavior: contain;
}

.film[open] {
  display: flex;
  align-items: center;
  justify-content: center;
  animation: film-in var(--duration-base) var(--ease-out);
}

.film::backdrop {
  background: transparent;
}

@keyframes film-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.film__inner {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.film__frame {
  position: relative;
  width: var(--film-w);
  aspect-ratio: 9 / 16;
  background: var(--color-video);
}

.film__video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.film__error {
  position: absolute;
  inset: 0;
  margin: 0;
  display: grid;
  place-items: center;
  padding: var(--space-5);
  text-align: center;
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
}

.film__error[hidden] {
  display: none;
}

.film__controls {
  width: min(100%, max(var(--film-w), 22rem));
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.film__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.film__caption {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-on-backdrop-muted);
}

.film__timeline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.film__seek,
.film__volume {
  height: 44px;
  margin: 0;
  accent-color: var(--color-on-backdrop);
  cursor: pointer;
}

.film__seek {
  flex: 1;
  min-width: 0;
}

.film__volume {
  width: 6rem;
}

.film__volume[hidden],
.film__btn[hidden] {
  display: none;
}

.film__time {
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
  color: var(--color-on-backdrop-muted);
  white-space: nowrap;
}

.film__buttons {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: var(--space-2);
  /* Button text lines up with the caption and the seek bar edges */
  margin-inline: calc(-1 * var(--space-2));
}

.film__top .film__btn {
  margin-right: calc(-1 * var(--space-2));
}

.film__btn {
  min-width: 44px;
  min-height: 44px;
  padding: 0 var(--space-2);
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-on-backdrop-muted);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-out);
}

.film__btn:hover {
  color: var(--color-on-backdrop);
}

.film__btn:active {
  transform: translateY(1px);
}

.film__btn:focus-visible,
.film__seek:focus-visible,
.film__volume:focus-visible {
  outline: 2px solid var(--color-on-backdrop);
  outline-offset: 2px;
  color: var(--color-on-backdrop);
}

.film__btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.film__btn--push {
  margin-left: auto;
}

/* Full screen keeps the controls with the video */
.film__inner:fullscreen {
  --film-h: min(calc(100vh - var(--space-10) - var(--space-7)), calc((100vw - 2 * var(--space-4)) * 16 / 9));
  justify-content: center;
  padding: var(--space-4);
  background: var(--color-video);
}

.film__inner:-webkit-full-screen {
  --film-h: min(calc(100vh - var(--space-10) - var(--space-7)), calc((100vw - 2 * var(--space-4)) * 16 / 9));
  justify-content: center;
  padding: var(--space-4);
  background: var(--color-video);
}