/* Checkbox-hack interaction, no JS. mask-image (not a gradient overlay)
   avoids assuming a background colour. jr-readon.js only measures height. */

.jr-readon {
  --jr-readon-preview-height: 26rem;
  --jr-readon-fade-height: 6rem;
  /* Reserved, always-empty strip at the bottom so the pill never overlaps
     text — the fade completes before it, rather than fading behind it. */
  --jr-readon-pill-gutter: 3rem;
  /* Override to disable/replace the fade; this alone won't produce a blur. */
  --jr-readon-mask-image: linear-gradient(
    to bottom,
    #000 calc(100% - var(--jr-readon-fade-height) - var(--jr-readon-pill-gutter)),
    transparent calc(100% - var(--jr-readon-pill-gutter))
  );
  --jr-readon-transition-duration: 300ms;
  --jr-readon-pill-bg: #212529;
  --jr-readon-pill-color: #fff;

  position: relative;
}

.jr-readon--h30 {
  --jr-readon-preview-height: 12rem;
}

.jr-readon--h40 {
  --jr-readon-preview-height: 18rem;
}

.jr-readon--h50 {
  --jr-readon-preview-height: 26rem;
}

.jr-readon--h60 {
  --jr-readon-preview-height: 36rem;
}

.jr-readon--h70 {
  --jr-readon-preview-height: 48rem;
}

.jr-readon__toggle {
  pointer-events: none;

  position: absolute;

  width: 1px;
  height: 1px;

  opacity: 0;
}

.jr-readon__content {
  overflow: hidden;

  max-height: var(--jr-readon-preview-height);
  padding-bottom: var(--jr-readon-pill-gutter);

  -webkit-mask-image: var(--jr-readon-mask-image);
  mask-image: var(--jr-readon-mask-image);
}

@media (prefers-reduced-motion: no-preference) {
  .jr-readon__content {
    interpolate-size: allow-keywords;
    transition:
      max-height var(--jr-readon-transition-duration) ease,
      padding-bottom var(--jr-readon-transition-duration) ease;
  }
}

.jr-readon__toggle:checked ~ .jr-readon__content {
  overflow: visible;
  /* jr-readon.js sets the pixel var so Firefox/Safari (no interpolate-size)
     still animate; `max-content` is only the no-JS/pre-measure fallback. */
  max-height: var(--jr-readon-content-height, max-content);
  padding-bottom: 0;

  -webkit-mask-image: none;
  mask-image: none;
}

.jr-readon__pill {
  cursor: pointer;
  user-select: none;

  position: absolute;
  z-index: 1;
  bottom: 0.5rem;
  left: 50%;
  transform: translateX(-50%);

  display: inline-flex;
  align-items: center;

  padding: 0.375rem 1.25rem;
  border-radius: 999px;

  font-size: 0.875rem;
  color: var(--jr-readon-pill-color);

  background-color: var(--jr-readon-pill-bg);
}

.jr-readon__toggle:checked ~ .jr-readon__pill {
  position: static;
  transform: none;
  /* margin-inline: auto only centers a block-level box; inline-flex ignores it. */
  display: flex;

  width: fit-content;
  margin-block-start: 1rem;
  margin-inline: auto;
}

.jr-readon__label--less {
  display: none;
}

.jr-readon__toggle:checked ~ .jr-readon__pill .jr-readon__label--more {
  display: none;
}

.jr-readon__toggle:checked ~ .jr-readon__pill .jr-readon__label--less {
  display: inline;
}