The shape of a button

[TotallyInformation]

@jbudd

And, briefly and tantalisingly, a round button that both scaled and stayed round at different resolutions. It looked horrible though and in attempting to improve it I broke it.

From my previous example, to make the button consistently round:

.square {
    width: var(--sq, 5em);
    height: var(--sq, 5em);
    border-radius: var(--sq, 5em);
}

The border radius needs to be the same as the width & height.