Harden CMS security and theme contrast

src/components/mobile-nav.tsx

@@ -18,7 +18,7 @@ export function MobileNav({ children, menuLabel = "Open menu", closeLabel = "Clo
         type="button"
         onClick={() => setOpen(!open)}
         className="flex md:hidden items-center justify-center w-10 h-10 rounded-lg transition-colors duration-150"
-        style={{ color: "var(--color-navbar-text)" }}
+        style={{ color: "var(--color-navbar-text-readable, var(--color-navbar-text))" }}
         aria-expanded={open}
         aria-controls="mobile-menu"
         aria-label={open ? closeLabel : menuLabel}