Expand/Collapse Widgets

This is the first example of expandable content.

It contains some important information that might not always be needed, so it's hidden by default to keep the page clean.

• Item 1
• Item 2
• Item 3

This is the second example. You can put any HTML content inside the `div` with the `details` class.

The content will smoothly appear and disappear when you click the button.

Sub-heading

Even more content here!