!-- OPTIMUM HEALTH — Site-Wide Custom Header/Navigation Design System: oh- prefix (Apple/Tesla quality) INSTALLATION: Go to Squarespace Admin → Settings → Advanced → Code Injection Paste this ENTIRE block into the "HEADER" code injection area. This will override the default Squarespace navigation site-wide. Then hide the default Squarespace header by adding this to Design → Custom CSS: header#header { display: none !important; } .header-announcement-bar-wrapper { display: none !important; } -->