Fix WordPress Nav Layout

The navigation bar on my WordPress site has gone off-kilter: the styling is off, menu items refuse to line up, and the drop-downs no longer open as they should. I need someone to dig into the theme’s CSS (and any related JavaScript) and restore a clean, consistent layout across desktop and mobile.

Here’s what counts as done:
• Every top-level item sits in a straight line with equal spacing.
• Drop-downs appear on hover/tap and inherit the same styling rules.
• The menu remains fully responsive, collapsing or stacking neatly on smaller screens without overlapping elements.

You’ll have full access to the WordPress dashboard and, if necessary, SFTP credentials. I prefer fixes placed in a child theme or Customizer’s Additional CSS so theme updates never wipe them out. Please let me know roughly how long you expect the adjustment to take and any tools or libraries you intend to use.