@angular/cdk/a11y-prebuilt.css

Angular Material Component Development Kit

.cdk-visually-hidden{border:0;clip:rect(0 0 0 0);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;white-space:nowrap;outline:0;-webkit-appearance:none;-moz-appearance:none;left:0}[dir=rtl] .cdk-visually-hidden{left:auto;right:0}