@layer basics {
  /* 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;
  }
}