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Stronger callout blocks

Adds a colored left border, rounded corners and a soft shadow to callout blocks so they stand out.

Code to copy

.notion-callout-block > div {
  border-left: 4px solid #2383e2 !important;
  border-radius: 6px !important;
  padding: 14px 16px !important;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08) !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.