app/src/components/Footer.astro

---
interface Props {
  citationText: string;
  bibtex: string;
  licence?: string;
  doi?: string;
}
const { citationText, bibtex, licence, doi } = Astro.props as Props;
---
<footer class="footer">
  <div class="footer-inner">
    <section class="citation-block">
      <h3>Citation</h3>
      <p>For attribution in academic contexts, please cite this work as</p>
      <pre class="citation short">{citationText}</pre>

      <p>BibTeX citation</p>
      <pre class="citation long">{bibtex}</pre>
    </section>
    {doi && (
      <section class="doi-block">
        <h3>DOI</h3>
        <p><a href={`https://doi.org/${doi}`} target="_blank" rel="noopener noreferrer">{doi}</a></p>
      </section>
    )}
    {licence && (
      <section class="reuse-block">
        <h3>Reuse</h3>
        <p set:html={licence}></p>
      </section>
    )}
    <section class="references-block">
      <slot />
    </section>
  </div>
</footer>


<script is:inline>
  (() => {
    const getFooter = () => document.currentScript?.closest('footer') || document.querySelector('footer.footer');
    const footer = getFooter();
    if (!footer) return;
    const target = footer.querySelector('.references-block');
    if (!target) return;

    const contentRoot = document.querySelector('section.content-grid main') || document.querySelector('main') || document.body;

    const ensureHeading = (text) => {
      const exists = Array.from(target.children).some((c) => c.tagName === 'H3' && c.textContent.trim().toLowerCase() === text.toLowerCase());
      if (!exists) {
        const h = document.createElement('h3');
        h.textContent = text;
        target.appendChild(h);
      }
    };

    const moveIntoFooter = (element, headingText) => {
      if (!element) return false;
      // Remove an eventual heading already included inside the block (avoid duplicates)
      const firstHeading = element.querySelector(':scope > h1, :scope > h2, :scope > h3');
      if (firstHeading) {
        const txt = (firstHeading.textContent || '').trim().toLowerCase();
        const targetTxt = headingText.trim().toLowerCase();
        if (txt === targetTxt || txt.includes('reference') || txt.includes('bibliograph')) {
          firstHeading.remove();
        }
      }
      ensureHeading(headingText);
      target.appendChild(element);
      return true;
    };
    const run = () => {
      const findFirstOutsideFooter = (selectors) => {
        for (const sel of selectors) {
          const el = contentRoot.querySelector(sel);
          if (el && !footer.contains(el)) return el;
        }
        return null;
      };

      const referencesEl = findFirstOutsideFooter(['#references', '.references', '.bibliography']);
      const footnotesEl = findFirstOutsideFooter(['.footnotes']);

      const movedRefs = moveIntoFooter(referencesEl, 'References');
      const movedNotes = moveIntoFooter(footnotesEl, 'Footnotes');
      return movedRefs || movedNotes;
    };

    // Try now; if not found yet, try again on DOM ready
    const done = run();
    if (!done) {
      const onReady = () => run();
      if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', onReady, { once: true });
      } else {
        setTimeout(onReady, 0);
      }
    }

    // Resize on window changes (e.g., fonts, layout)
    // No textarea auto-resize needed for <pre> blocks
  })();
</script>


<style is:global>
  .footer {
    contain: layout style;
    font-size: 0.8em;
    line-height: 1.7em;
    margin-top: 60px;
    margin-bottom: 0;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    color: rgba(0, 0, 0, 0.5);
  }

  .footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 60px 16px 48px;
    display: grid;
    grid-template-columns: 220px minmax(0, 680px) 260px;
    gap: 32px;
    align-items: start;
  }

  /* Use the parent grid (3 columns like .content-grid) */
  .citation-block,
  .references-block,
  .reuse-block,
  .doi-block {
    display: contents;
  }

  .citation-block > h3,
  .references-block > h3,
  .reuse-block > h3,
  .doi-block > h3 {
    grid-column: 1;
    font-size: 15px;
    margin: 0;
    text-align: right;
    padding-right: 30px;
  }

  .citation-block > :not(h3),
  .references-block > :not(h3),
  .reuse-block > :not(h3),
  .doi-block > :not(h3) {
    grid-column: 2;
  }


  .citation-block h3 {
    margin: 0 0 8px;
  }

  .citation-block h4 {
    margin: 16px 0 8px;
    font-size: 14px;
    text-transform: uppercase;
    color: var(--muted-color);
  }

  .citation-block p,
  .reuse-block p,
  .doi-block p,
  .footnotes ol,
  .footnotes ol p,
  .references {
    margin-top: 0;
  }

  /* Distill-like appendix citation styling */
  .citation {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 11px;
    line-height: 15px;
    border-left: 1px solid rgba(0, 0, 0, 0.1);
    padding-left: 18px;
    border: 1px solid rgba(0,0,0,0.1);
    background: rgba(0, 0, 0, 0.02);
    padding: 10px 18px;
    border-radius: 3px;
    color: rgba(150, 150, 150, 1);
    overflow: hidden;
    margin-top: -12px;
    white-space: pre-wrap;
    word-wrap: break-word;
  }

  .citation a {
    color: rgba(0, 0, 0, 0.6);
    text-decoration: underline;
  }

  .citation.short {
    margin-top: -4px;
  }

  .references-block h3 {
    margin: 0;
  }

  /* Distill-like list styling for references/footnotes */
  .references-block ol {
    padding: 0 0 0 15px;
  }

  @media (min-width: 768px) {
    .references-block ol {
      padding: 0 0 0 30px;
      margin-left: -30px;
    }
  }

  .references-block li {
    margin-bottom: 1em;
  }

  .references-block a {
    color: var(--text-color);
  }

  [data-theme="dark"] .footer { border-top-color: rgba(255,255,255,.15); color: rgba(200,200,200,.8); }
  [data-theme="dark"] .citation { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,.15); color: rgba(200,200,200,1); }
[data-theme="dark"] .citation a { color: rgba(255,255,255,0.75); }


  /* Footer links: use primary color consistently */
  .footer a {
    color: var(--primary-color);
    border-bottom: 1px solid var(--link-underline);
    text-decoration: none;
  }
  .footer a:hover {
    color: var(--primary-color-hover);
    border-bottom-color: var(--link-underline-hover);
  }
  [data-theme="dark"] .footer a {
    color: var(--primary-color);
  }
</style>