fix: update sub-products in footer

static/css/main.css

@@ -1263,7 +1263,7 @@ a.citation-count-badge:hover {
 
 .article-citation-item {
   display: flex;
-  align-items: baseline;
+  align-items: flex-start;
   gap: 0.5rem;
   font-size: 0.8rem;
   color: var(--text-secondary);
@@ -1284,16 +1284,64 @@ a.citation-count-badge:hover {
   flex: 1;
 }
 
-.citation-link {
+.citation-actions {
   flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 0.65rem;
+}
+
+.citation-link,
+.citation-copy {
   color: var(--accent-blue-light);
   opacity: 0.75;
   transition: opacity 0.2s;
   display: flex;
   align-items: center;
+  justify-content: center;
 }
 
-.citation-link:hover {
+.citation-copy {
+  position: relative;
+  padding: 0;
+  border: none;
+  background: none;
+  cursor: pointer;
+  font: inherit;
+}
+
+.citation-link:hover,
+.citation-copy:hover {
+  opacity: 1;
+}
+
+.citation-copy-feedback {
+  position: absolute;
+  left: 50%;
+  top: calc(100% + 0.2rem);
+  transform: translateX(-50%);
+  font-size: 0.62rem;
+  font-weight: 600;
+  letter-spacing: 0.02em;
+  color: var(--accent-blue-light);
+  white-space: nowrap;
+  pointer-events: none;
+}
+
+.citation-copy-icon-done {
+  display: none;
+}
+
+.citation-copy.is-copied .citation-copy-icon {
+  display: none;
+}
+
+.citation-copy.is-copied .citation-copy-icon-done {
+  display: flex;
+}
+
+.citation-copy.is-copied {
   opacity: 1;
 }
 

static/js/main.js

@@ -9,6 +9,7 @@ const SELECTORS = {
   faqQuestion: '.faq-question',
   faqAnswer: '.faq-answer',
   fadeInElements: '.fade-in',
+  citationCopy: '.citation-copy',
 };
 
 function initNavbarScroll() {
@@ -190,6 +191,47 @@ function initReadMore() {
   });
 }
 
+function initCitationCopy() {
+  const copyButtons = document.querySelectorAll(SELECTORS.citationCopy);
+  if (!copyButtons.length) return;
+
+  copyButtons.forEach((btn) => {
+    const url = btn.getAttribute('data-citation-url');
+    const feedback = btn.querySelector('.citation-copy-feedback');
+    if (!url || !feedback) return;
+
+    let resetTimer = null;
+
+    btn.addEventListener('click', async () => {
+      clearTimeout(resetTimer);
+
+      try {
+        await navigator.clipboard.writeText(url);
+      } catch {
+        const textarea = document.createElement('textarea');
+        textarea.value = url;
+        textarea.setAttribute('readonly', '');
+        textarea.style.position = 'fixed';
+        textarea.style.left = '-9999px';
+        document.body.appendChild(textarea);
+        textarea.select();
+        document.execCommand('copy');
+        document.body.removeChild(textarea);
+      }
+
+      feedback.hidden = false;
+      btn.classList.add('is-copied');
+      btn.setAttribute('aria-label', 'Link copied');
+
+      resetTimer = setTimeout(() => {
+        feedback.hidden = true;
+        btn.classList.remove('is-copied');
+        btn.setAttribute('aria-label', 'Copy citation link');
+      }, 2000);
+    });
+  });
+}
+
 function init() {
   initNavbarScroll();
   initMobileMenu();
@@ -197,6 +239,7 @@ function init() {
   initFAQAccordion();
   initIntersectionObserver();
   initReadMore();
+  initCitationCopy();
 }
 
 if (document.readyState === 'loading') {