Editing Template:Key press/styles.css

/* {{pp-template}} */
.keyboard-key {
	border: 1px solid #aaa;
	border-radius: 0.2em;
	box-shadow: 0.1em 0.1em 0.2em rgba(0, 0, 0, 0.1);
	background-color: var(--background-color-neutral-subtle, #f8f9fa);
	background-image: linear-gradient(to bottom, var(--background-color-neutral, #eaecf0), var(--background-color-neutral-subtle, #f8f9fa), var(--background-color-neutral, #eaecf0));
	color: var(--color-base, #202122);
	padding: 0.1em 0.3em;
	font-family: inherit;
	font-size: 0.85em;
}