Wix Studio Functionality & Responsiveness

I have a Wix Studio site in progress and the desktop layout is mostly settled, but several key pieces still need to be wired up and every screen size has to look as polished as the main view. The immediate... (Budget: $250 - $750 AUD, Jobs: Claude (Anthropic), CSS, HTML, HTML5, JavaScript, Web Design, Web Development, Website Optimization, Wix)