feat(layout): footer on the page grid with themed colors

app/src/components/Footer.astro

@@ -8,6 +8,7 @@ interface Props {
 }
 const { citationText, bibtex, licence, doi, template = "article" } = Astro.props as Props;
 const isPaper = template === "paper";
+// Styles in src/styles/layout/_footer.css
 ---
 
 <footer class="footer">
@@ -225,216 +226,3 @@ const isPaper = template === "paper";
     // 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 > .footer-heading,
-  .references-block > .footer-heading,
-  .reuse-block > .footer-heading,
-  .doi-block > .footer-heading {
-    grid-column: 1;
-    font-size: 15px;
-    font-weight: 600;
-    margin: 0;
-    text-align: right;
-    padding-right: 30px;
-  }
-
-  .citation-block > :not(.footer-heading),
-  .references-block > :not(.footer-heading),
-  .reuse-block > :not(.footer-heading),
-  .doi-block > :not(.footer-heading) {
-    grid-column: 2;
-  }
-
-  .citation-block .footer-heading {
-    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;
-  }
-
-  /* Preserve KaTeX rendering in footnotes - essential for math formulas */
-  /* Compensate for footer's 0.8em font-size */
-  .footer .footnotes .katex {
-    font-size: 1.25em; /* 1em / 0.8em = 1.25em to compensate */
-    line-height: 1.21;
-  }
-
-  .footer .footnotes .katex-display {
-    margin: 1em 0;
-    text-align: center;
-    display: block;
-    overflow-x: auto;
-    overflow-y: hidden;
-  }
-
-  .footer .footnotes .katex-display > .katex {
-    display: block;
-    text-align: center;
-  }
-
-  /* Preserve KaTeX internal structure */
-  .footer .footnotes .katex .katex-html {
-    display: inline-block;
-  }
-
-  .footer .footnotes .katex .base {
-    display: inline-block;
-  }
-
-  /* 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 .footer-heading {
-    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, 0.15);
-    color: rgba(200, 200, 200, 0.8);
-  }
-  [data-theme="dark"] .citation {
-    background: rgba(255, 255, 255, 0.04);
-    border-color: rgba(255, 255, 255, 0.15);
-    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);
-  }
-
-  /* Template credit - discrete at the bottom */
-  .template-credit {
-    display: contents;
-  }
-
-  .template-credit p {
-    grid-column: 2;
-    margin: 24px 0 0 0;
-    font-size: 0.85em;
-    color: rgba(0, 0, 0, 0.5);
-  }
-
-  .template-credit a {
-    color: rgba(0, 0, 0, 0.6);
-    border-bottom: 1px solid rgba(0, 0, 0, 0.15);
-  }
-
-  .template-credit a:hover {
-    color: rgba(0, 0, 0, 0.8);
-    border-bottom-color: rgba(0, 0, 0, 0.3);
-  }
-
-  [data-theme="dark"] .template-credit p {
-    color: rgba(200, 200, 200, 0.6);
-  }
-
-  [data-theme="dark"] .template-credit a {
-    color: rgba(200, 200, 200, 0.7);
-    border-bottom-color: rgba(255, 255, 255, 0.2);
-  }
-
-  [data-theme="dark"] .template-credit a:hover {
-    color: rgba(200, 200, 200, 0.9);
-    border-bottom-color: rgba(255, 255, 255, 0.35);
-  }
-</style>

app/src/styles/layout/_footer.css

@@ -0,0 +1,181 @@
+/* ============================================================================ */
+/* Footer: headings in the TOC rail (right aligned), content in the body column */
+/* ============================================================================ */
+
+.footer {
+  contain: layout style;
+  font-size: 0.8em;
+  line-height: 1.7em;
+  margin-top: 60px;
+  margin-bottom: 0;
+  border-top: 1px solid var(--border-color);
+  color: var(--muted-color);
+  background: var(--page-bg);
+}
+
+.footer-inner {
+  display: grid;
+  grid-template-columns: var(--layout-cols);
+  row-gap: 28px;
+  padding: 60px 0 48px;
+  align-items: start;
+}
+
+/* Blocks flatten into the footer grid */
+.citation-block,
+.references-block,
+.reuse-block,
+.doi-block,
+.template-credit {
+  display: contents;
+}
+
+.footer-inner > * > * {
+  grid-column: body;
+  min-width: 0;
+}
+
+.footer-inner > * > .footer-heading {
+  grid-column: toc;
+  justify-self: end;
+  font-size: 15px;
+  font-weight: 600;
+  margin: 0;
+  text-align: right;
+  padding-right: 30px;
+  color: var(--text-color);
+}
+
+@media (--bp-content-collapse) {
+  .footer-inner {
+    padding: 40px 0;
+    row-gap: 12px;
+  }
+
+  .footer-inner > * > .footer-heading {
+    grid-column: body;
+    justify-self: start;
+    text-align: left;
+    padding: 0;
+    margin-top: 16px;
+  }
+}
+
+.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;
+}
+
+/* Preserve KaTeX rendering in footnotes (compensates the footer's 0.8em) */
+.footer .footnotes .katex {
+  font-size: 1.25em;
+  line-height: 1.21;
+}
+
+.footer .footnotes .katex-display {
+  margin: 1em 0;
+  text-align: center;
+  display: block;
+  overflow-x: auto;
+  overflow-y: hidden;
+}
+
+.footer .footnotes .katex-display > .katex {
+  display: block;
+  text-align: center;
+}
+
+.footer .footnotes .katex .katex-html,
+.footer .footnotes .katex .base {
+  display: inline-block;
+}
+
+/* Distill-like appendix citation styling */
+.footer .citation {
+  font-family: var(--font-mono);
+  font-size: 11px;
+  line-height: 15px;
+  border: 1px solid var(--border-color);
+  background: var(--surface-bg);
+  padding: 10px 18px;
+  border-radius: 3px;
+  color: var(--muted-color);
+  overflow: hidden;
+  margin: -12px 0 0;
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
+}
+
+.footer .citation.short {
+  margin-top: -4px;
+}
+
+.footer .citation a {
+  color: var(--text-color);
+  text-decoration: underline;
+}
+
+/* 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 li:target {
+  color: var(--text-color);
+  background: color-mix(in srgb, var(--primary-color) 12%, transparent);
+  border-radius: 4px;
+}
+
+.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);
+}
+
+.references-block a {
+  color: var(--text-color);
+}
+
+/* Template credit, discrete at the bottom */
+.template-credit p {
+  margin: 24px 0 0;
+  font-size: 0.85em;
+  color: var(--muted-color);
+}
+
+.footer .template-credit a {
+  color: var(--muted-color);
+  border-bottom: 1px solid var(--border-color);
+}
+
+.footer .template-credit a:hover {
+  color: var(--text-color);
+  border-bottom-color: var(--muted-color);
+}