function openSearch() { document.getElementById('searchModal').classList.add('open'); document.getElementById('searchInput').focus(); document.body.style.overflow = 'hidden'; } function closeSearch() { document.getElementById('searchModal').classList.remove('open'); document.body.style.overflow = ''; document.getElementById('searchInput').value = ''; document.getElementById('searchResults').innerHTML = '

Start typing to search articles…

'; } document.addEventListener('keydown', e => { if ((e.metaKey || e.ctrlKey) && e.key === 'k') { e.preventDefault(); openSearch(); } if (e.key === 'Escape') closeSearch(); }); document.getElementById('searchInput')?.addEventListener('input', e => { const q = e.target.value.toLowerCase().trim(); const results = document.getElementById('searchResults'); if (!q) { results.innerHTML = '

Start typing to search articles…

'; return; } const matches = searchData.filter(a => a.title.toLowerCase().includes(q) || (a.intro||'').toLowerCase().includes(q) || a.channel.toLowerCase().includes(q) || (a.tags||[]).some(t => t.toLowerCase().includes(q)) ).slice(0, 8); if (!matches.length) { results.innerHTML = '

No articles found

'; return; } results.innerHTML = matches.map(a => `

${a.title}

${a.channel.replace(/-/g,' ')}${a.difficulty}

`).join(''); }); function toggleTheme() { const html = document.documentElement; const next = html.getAttribute('data-theme') === 'dark' ? 'light' : 'dark'; html.setAttribute('data-theme', next); localStorage.setItem('theme', next); } // Reading progress window.addEventListener('scroll', () => { const bar = document.getElementById('reading-progress'); const btt = document.getElementById('back-to-top'); if (bar) { const doc = document.documentElement; const pct = (doc.scrollTop / (doc.scrollHeight - doc.clientHeight)) * 100; bar.style.width = Math.min(pct, 100) + '%'; } if (btt) btt.classList.toggle('visible', window.scrollY > 400); }); // TOC active state const tocLinks = document.querySelectorAll('.toc-list a'); if (tocLinks.length) { const observer = new IntersectionObserver(entries => { entries.forEach(e => { if (e.isIntersecting) { tocLinks.forEach(l => l.classList.remove('active')); const active = document.querySelector('.toc-list a[href="#' + e.target.id + '"]'); if (active) active.classList.add('active'); } }); }, { rootMargin: '-20% 0px -70% 0px' }); document.querySelectorAll('.article-content h2[id]').forEach(h => observer.observe(h)); } function filterArticles(difficulty, btn) { document.querySelectorAll('.diff-filter').forEach(b => b.classList.remove('active')); if (btn) btn.classList.add('active'); document.querySelectorAll('.article-card').forEach(card => { card.style.display = (difficulty === 'all' || card.dataset.difficulty === difficulty) ? '' : 'none'; }); } function copySnippet(btn) { const snippet = document.getElementById('shareSnippet')?.innerText; if (!snippet) return; navigator.clipboard.writeText(snippet).then(() => { btn.innerHTML = ''; if (typeof lucide !== 'undefined') lucide.createIcons(); setTimeout(() => { btn.innerHTML = ''; if (typeof lucide !== 'undefined') lucide.createIcons(); }, 2000); }); } if (typeof lucide !== 'undefined') lucide.createIcons();