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Medium: comfortable reading width

Narrows the text column to an eye-friendly width and centres the article on the page.

Code to copy

/* Comfortable, narrower reading column for long articles */
article {
  max-width: 42rem !important;
  margin-left: auto !important;
  margin-right: auto !important;
}
article p, article li {
  max-width: 100% !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.