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client/src/index.css

@@ -109,14 +109,18 @@
 html.is-chrome body, html.is-chrome #root {
   will-change: transform;
   transform: translateZ(0);
-  contain: paint;
+  contain: paint layout;
+  scroll-behavior: smooth;
+  -webkit-font-smoothing: antialiased;
 }
 
 /* Quick Actions alignment parity with Safari (Chrome only) */
 html.is-chrome .qa-card { min-height: 128px; }
-html.is-chrome .qa-card h3 { line-height: 1.25; }
+html.is-chrome .qa-card h3 { line-height: 1.25; font-weight: 600; }
 html.is-chrome .qa-card p { line-height: 1.25; }
 html.is-chrome .qa-card .icon-wrap { flex-shrink: 0; }
+/* ensure identical spacing as Safari via explicit margins */
+html.is-chrome .qa-card .icon-wrap + div { margin-left: 1rem; }
 
 /* Custom scrollbar */
 ::-webkit-scrollbar {

client/src/index.tsx

@@ -9,10 +9,12 @@ import App from './App';
 (() => {
   try {
     const ua = navigator.userAgent;
-    const isChromium = /Chrome\//.test(ua) && !/Edg\//.test(ua) && !/OPR\//.test(ua) && !/Safari\//.test(ua);
+    const isChromiumFamily = /Chrome\/\d+/.test(ua) && !/Edg\//.test(ua) && !/OPR\//.test(ua);
+    const isGoogleVendor = (navigator.vendor || '').includes('Google');
     // On iOS, all browsers are Safari WebKit; avoid applying on iOS
     const isIOS = /iPhone|iPad|iPod/.test(ua);
-    if (isChromium && !isIOS) {
+    const isChrome = isChromiumFamily && isGoogleVendor && !isIOS;
+    if (isChrome) {
       document.documentElement.classList.add('is-chrome');
     }
   } catch {}