Some default styles I like to include on most projects

defaults.styl

// @sauce: https://getbootstrap.com/docs/4.4/getting-started/accessibility/#visually-hidden-content
.sr-only
    position: absolute
    width: 1px
    height: 1px
    padding: 0
    margin: -1px
    overflow: hidden
    clip: rect(0,0,0,0)
    white-space: nowrap
    border: 0
    
.sr-only-focusable:active,
.sr-only-focusable:focus
    position: static
    width: auto
    height: auto
    overflow: visible
    clip: auto
    white-space: normal