/* -- Audio component ------------------------------------------ */
/* A native <audio> (no controls of its own) behind one row: the  */
/* play toggle, a title over the scrubber and its readouts, the   */
/* sound controls - Buttons, Sliders and readouts                 */
/* (data-audio-action / -output). An optional line under the      */
/* scrubber shows the active caption cue, a transcript as it is   */
/* spoken. data-variant="compact" drops the frame and the title.  */
@layer components {
  .audio {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    inline-size: 100%;
    min-inline-size: 0;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background-color: var(--card);
    color: var(--card-foreground);
    container-type: inline-size;

    & > audio:not([controls]) {
      display: none;
    }

    & > [data-audio-action="volume"] {
      inline-size: 4.5rem;
    }
  }

  .audio-body {
    display: grid;
    flex: 1;
    gap: 0.125rem;
    min-inline-size: 0;
  }

  .audio-title {
    overflow: hidden;
    font-size: 0.875rem;
    font-weight: 500;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .audio-progress {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-inline-size: 0;

    & > [data-audio-action="seek"] {
      flex: 1;
      min-inline-size: 3rem;
    }
  }

  /* a readout: m:ss in even digits, so the row does not jitter */
  .audio-time {
    min-inline-size: 2.5rem;
    color: var(--muted-foreground);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
    text-align: center;
  }

  /* the active cue - collapses when captions are off or nothing is said */
  .audio-captions {
    margin: 0;
    color: var(--muted-foreground);
    font-size: 0.8125rem;
    font-style: italic;
    text-wrap: pretty;

    &:empty {
      display: none;
    }
  }

  /* a toggle with two icons shows the first when off, the second when on (play / pause, sound / muted) */
  [data-audio-action][aria-pressed="false"] > :nth-child(2),
  [data-audio-action][aria-pressed="true"] > :nth-child(1):not(:only-child) {
    display: none;
  }

  /* a control the page may not use (full screen in a frame without it) - over the Button's own display */
  [data-audio-action][hidden] {
    display: none;
  }

  /* a rate select keeps its own width in the row (a Select is as wide as its box) */
  select[data-audio-action="rate"] {
    flex: none;
    inline-size: auto;
  }

  /* the sound button with a vertical volume in a panel above it (below with data-side="bottom"), shown while the
     pointer or the focus is on either - the row keeps one button's width */
  .audio-volume {
    position: relative;
    display: inline-flex;
  }

  .audio-volume-panel {
    position: absolute;
    inset-block-end: 100%;
    inset-inline-start: 50%;
    z-index: 3;
    display: grid;
    place-items: center;
    margin-block-end: 0.375rem;
    padding: 0.75rem 0.625rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background-color: var(--popover);
    box-shadow: var(--shadow-md);
    translate: -50% 0;
    visibility: hidden;
    opacity: 0;

    /* the gap to the button belongs to the hover */
    &::after {
      position: absolute;
      inset-inline: 0;
      inset-block-start: 100%;
      block-size: 0.5rem;
      content: "";
    }

    /* a vertical range's block axis is horizontal: its length is its height */
    & > .slider[data-orientation="vertical"] {
      height: 5.5rem;
    }

    .audio-volume:is(:hover, :focus-within) > & {
      visibility: visible;
      opacity: 1;
    }

    .audio-volume[data-side="bottom"] > & {
      inset-block: 100% auto;
      margin-block: 0.375rem 0;

      &::after {
        inset-block: auto 100%;
      }
    }
  }

  .audio[data-variant="compact"] {
    padding: 0;
    border: 0;
    background-color: transparent;

    & .audio-title {
      display: none;
    }
  }

  /* a narrow player keeps play, the scrubber, the time and the sound */
  @container (inline-size < 22rem) {
    .audio > [data-audio-action="volume"],
    .audio > [data-audio-action="rate"],
    .audio-progress > [data-audio-output="duration"] {
      display: none;
    }
  }

  @media (prefers-reduced-motion: no-preference) {
    .audio-volume-panel {
      transition:
        opacity 0.15s ease,
        visibility 0.15s allow-discrete;
    }
  }

  @media (prefers-contrast: more) {
    .audio-time,
    .audio-captions {
      color: var(--foreground);
    }
  }

  @media (forced-colors: active) {
    .audio,
    .audio-volume-panel {
      border-color: CanvasText;
    }

    .audio-volume-panel {
      background-color: Canvas;
    }
  }
}