Shadow Gotcha: Background Color

An element needs a background for the shadow to look right.

Incorrect: Shadow on Transparent Element

This div has `shadow-lg` but no `bg-*` class.
The shadow renders on the yellow container.

Notice how the shadow is on the yellow background, not 'lifting' this box.

Correct: Shadow with Background Color

With `bg-white`

Here, `bg-white` makes the shadow appear correctly on the element itself.