burger

nav.js

@@ -0,0 +1,18 @@
+// Shared hamburger menu toggle
+(function () {
+  document.addEventListener('DOMContentLoaded', () => {
+    const btn = document.getElementById('hamburger-btn')
+    const menu = document.getElementById('hamburger-menu')
+    if (!btn || !menu) return
+    btn.addEventListener('click', (e) => {
+      e.stopPropagation()
+      menu.classList.toggle('open')
+    })
+    document.addEventListener('click', () => menu.classList.remove('open'))
+    // mark active link
+    const current = location.pathname.split('/').pop() || 'index.html'
+    menu.querySelectorAll('a').forEach(a => {
+      if (a.getAttribute('href') === current) a.classList.add('active')
+    })
+  })
+})()