https://hugogiraudel.com/2016/10/13/css-hide-and-seek/\n\n@mixin sr-only {\n  position: absolute;\n  width: 1px;\n  height: 1px;\n  padding: 0;\n  overflow: hidden;\n  clip: rect(0, 0, 0, 0);\n  white-space: nowrap;\n  border: 0;\n}\n\n// Use in conjunction with .sr-only to only display content when it's focused.\n//\n// Useful for \"Skip to main content\" links; see https://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1\n//\n// Credit: HTML5 Boilerplate\n\n@mixin sr-only-focusable {\n  &:active,\n...