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Glass Mega Dropdown Menu

Explore how to implement a glassmorphic mega dropdown menu using CSS, focusing on backdrop-filter and grid layouts. Learn to style a fixed navbar with blurred backgrounds, build responsive dropdowns in multiple columns, and use hover and focus states for interactivity—all with CSS only. This lesson equips you to create visually appealing, accessible navigation menus that adapt across screen sizes.

Problem description

Given HTML markup for a <nav> containing an unordered list of menu items, each optionally wrapping a <div class="dropdown"> with submenu links, write CSS to:

  • Style the navbar with a frosted-glass background and blurred backdrop.

  • Position .dropdown panels absolutely below the navbar, hidden by default (opacity: 0; visibility: hidden). ...