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Focus mode: auto-hide navigation

Collapses the GA4 left menu to zero width and expands it only on hover, giving reports maximum space.

Code to copy

nav[role="navigation"], [class*="side-nav"], [class*="left-nav"] {
  transition: width 0.15s ease !important;
  width: 0 !important; min-width: 0 !important;
  overflow: hidden !important;
}
nav[role="navigation"]:hover, [class*="side-nav"]:hover, [class*="left-nav"]:hover {
  width: 250px !important; min-width: 250px !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.