// mixins
// --------------------------
// base rendering for an icon
@mixin fa-icon {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    font-weight: normal;
    line-height: 1;
}
// sets relative font-sizing and alignment (in _sizing)
@mixin fa-size($font-size) {
    font-size: fa-divide($font-size, $fa-size-scale-base) * 1em; // converts step in sizing scale into an em-based value that's relative to the scale's base
    line-height: fa-divide(1, $font-size) * 1em; // sets the line-height of the icon back to that of it's parent
    vertical-align: (fa-divide(6, $font-size) - fa-divide(3, 8)) * 1em; // vertically centers the icon taking into account the surrounding text's descender
}
// only display content to screen readers
// see: https://www.a11yproject.com/posts/2013-01-11-how-to-hide-content/
// see: https://hugogiraudel.com/2016/10/13/css-hide-and-seek/
@mixin fa-sr-only() {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}
// use in conjunction with .sr-only to only display content when it's focused
@mixin fa-sr-only-focusable() {
    &:not(:focus) {
        @include fa-sr-only();
    }
}
// sets a specific icon family to use alongside style + icon mixins
// convenience mixins for declaring pseudo-elements by CSS variable,
// including all style-specific font properties, and both the ::before
// and ::after elements in the duotone case.
@mixin fa-icon-solid($fa-var) {
    @extend %fa-icon;
    @extend .fa-solid;

    &::before {
        content: unquote("\"#{ $fa-var }\"");
    }
}
@mixin fa-icon-regular($fa-var) {
    @extend %fa-icon;
    @extend .fa-regular;

    &::before {
        content: unquote("\"#{ $fa-var }\"");
    }
}
@mixin fa-icon-brands($fa-var) {
    @extend %fa-icon;
    @extend .fa-brands;

    &::before {
        content: unquote("\"#{ $fa-var }\"");
    }
}
