Ghost/ghost/admin/assets/sass/patterns/global.scss

//
// Globals
// --------------------------------------------------

*, *:before, *:after {
    @include box-sizing(border-box);
}

html {
    font: 62.5%/1.65 "Open Sans", sans-serif;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body {
    width: 100%;
}

a, a:active {
    text-decoration: none;
}

//
// Utilities
// --------------------------------------------------

.show {
    display: block !important;
}

.hidden {
    display: none !important;
    visibility: hidden !important;
}

.invisible {
    visibility: hidden;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;

    &:active,
    &:focus {
        position: static;
        width: auto;
        height: auto;
        margin: 0;
        overflow: visible;
        clip: auto;
    }
}