floor-typography-css/src/floor-sub-sup.css

Vanilla CSS normalizer and the extra minimum for an intuitive default CSS for typography and web-apps.

/* prevent `sub` and `sup` elements from affecting the line height in all browsers */
sub,
sup {
	position: relative;
	font-size: 75%;
	line-height: 0;
	vertical-align: baseline;
}
sub { bottom: -0.25em; }
sup { top: -0.5em; }