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Fix a Blank Page When Your HTML File Won't Open Right Level: Beginner

Your HTML file opens blank, shows as text, or downloads instead of rendering. Check the extension, the file:// open path, the doctype and a missing closing tag before you rewrite the page.

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Read Computed Styles in DevTools Without Guessing Level: Beginner

Trace a reproducible colour and spacing conflict from the rendered result to the winning rule, then verify the repair in the source file.