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Grokking CSS Design Patterns to Ace Interviews

Notification Banner and Sidebar Toggle

Explore how to implement a notification banner and sidebar whose visibility and positioning adapt responsively across mobile, tablet, and desktop breakpoints using pure CSS. Learn to manage layout shifts and content padding to ensure important messages and navigation prioritize user experience without modifying HTML or using JavaScript.

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Problem description

You are given an HTML page containing three main sections:

  • A <div class="notification-banner"> that displays important messages

  • An <aside class="sidebar"> that provides navigation links

  • A <main class="content"> that contains the page’s primary content ...