diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9a737b2..17e6970 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ All notable changes to the New Optic website will be documented in this file.
 - Tightened mobile sizing for the WhatsApp nav pill and hero trust badge.
 - Balanced mobile navbar controls so the language switcher, WhatsApp CTA, and menu do not bunch up on the right.
 - Reduced the mobile gap between the reputation section and contact panel.
+- Let the mobile WhatsApp nav CTA stretch into available navbar space.
 
 ## [1.0.0] - 2026-05-16
 
diff --git a/components/Navbar.tsx b/components/Navbar.tsx
index 52c5ee6..ce84efe 100644
--- a/components/Navbar.tsx
+++ b/components/Navbar.tsx
@@ -48,9 +48,9 @@ export default function Navbar({ locale, onLocaleChange, t, whatsappUrl }: { loc
           </PhysicsButton>
         </div>
 
-        <div className="relative z-[3] flex min-w-0 flex-1 items-center justify-between gap-1 max-[374px]:gap-0.5 sm:gap-2 md:hidden">
-          <LanguageSwitcher locale={locale} onLocaleChange={onLocaleChange} className="min-w-[108px] max-w-[132px] flex-1 bg-white/80 backdrop-blur-none max-[374px]:min-w-[96px] max-[374px]:max-w-[108px] max-[374px]:p-0.5" buttonClassName="flex-1 px-0.5 max-[374px]:px-0 max-[374px]:py-1.5 sm:px-3" />
-          <PhysicsButton href={whatsappUrl} external className={`${navCtaClassName} shrink-0 px-2.5 py-2 text-[11px] max-[374px]:px-1.5 max-[374px]:py-1.5 max-[374px]:text-[9px] sm:px-5 sm:py-2.5 sm:text-sm`}>
+        <div className="relative z-[3] flex min-w-0 flex-1 items-center gap-1.5 max-[374px]:gap-0.5 sm:gap-2 md:hidden">
+          <LanguageSwitcher locale={locale} onLocaleChange={onLocaleChange} className="w-[132px] shrink-0 bg-white/80 backdrop-blur-none max-[374px]:w-[106px] max-[374px]:p-0.5" buttonClassName="flex-1 px-0.5 max-[374px]:px-0 max-[374px]:py-1.5 sm:px-3" />
+          <PhysicsButton href={whatsappUrl} external className={`${navCtaClassName} min-w-0 flex-1 px-2.5 py-2 text-[11px] max-[374px]:px-1.5 max-[374px]:py-1.5 max-[374px]:text-[9px] sm:px-5 sm:py-2.5 sm:text-sm`}>
             {t.nav.cta}
           </PhysicsButton>
           <motion.button