?

Here is a bunch of text which would be our help, or whatever else you want in this sort of “popover” dialog thing.

Rather nicely, it doesn't require any JS at all, which is neat.

Demonstrating a pure CSS “modal” dialog with the details element

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The little question mark button top right ought to show a sort of “help” modal.

Is this woefully terrible for accessibility, I wonder? It might be.

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quibusdam debitis ea necessitatibus, veritatis ipsa, doloremque id eum officiis mollitia, soluta tempora est, odio nostrum. Ut voluptate reprehenderit eum impedit, accusamus?

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quibusdam debitis ea necessitatibus, veritatis ipsa, doloremque id eum officiis mollitia, soluta tempora est, odio nostrum. Ut voluptate reprehenderit eum impedit, accusamus?

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quibusdam debitis ea necessitatibus, veritatis ipsa, doloremque id eum officiis mollitia, soluta tempora est, odio nostrum. Ut voluptate reprehenderit eum impedit, accusamus?