Add DOMContentLoaded script to inject inline fontSize/padding styles on .mobile-nav-close button. Add drawerStyle createElement with @media(max-width:700px) rules for .nav.mobile-drawer-open class with fixed positioning, 82vw/310px width, translate3d transform, and z-index:1000. Add mobile-drawer-open class toggle to closeNav/openNav functions alongside mobile-nav-open body class