Template:Screen reader-only/styles.css

/* {{pp-template}}

This implementation is from
https://cloudfour.com/thinks/see-no-evil-hidden-content-and-accessibility/#showing-additional-content-for-screen-readers
which is a slight tweak from https://accessibility.18f.gov/hidden-content/ .
https://webaim.org/techniques/css/invisiblecontent/#techniques
has slightly different CSS clip, rect (1px) for all dimensions.

WARNING:

Template:Fraction and friends use this styles.css page and class directly rather
than going through the template.

*/
/* We retain .sr-only as the class name because it's used by the outside world. */
.sr-only {
 border: 0;
 clip: rect(0, 0, 0, 0); /* Removed from CSS specification */
 /* clip-path is the replacement for clip, but very few browsers support it. */
 clip-path: polygon(0px 0px, 0px 0px, 0px 0px);
 height: 1px;
 margin: -1px;
 overflow: hidden;
 padding: 0;
 position: absolute;
 width: 1px;
 white-space: nowrap;
}