hacks-guide-minimal-mistakes-theme/assets/_scss/_utilities.scss

/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */

/*
   Visibility
   ========================================================================== */

/* http://www.456bereastreet.com/archive/200711/screen_readers_sometimes_ignore_displaynone/ */

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

/* for preloading images */

.load {
  display: none;
}

.transparent {
  opacity: 0;
}

/* https://developer.yahoo.com/blogs/ydn/clip-hidden-content-better-accessibility-53456.html */

.visually-hidden,
.screen-reader-text,
.screen-reader-text span,
.screen-reader-shortcut {
  position: absolute !important;
  clip: rect(1px, 1px, 1px, 1px);
  height: 1px !important;
  width: 1px !important;
  border: 0 !important;
  overflow: hidden;
}

body:hover .visually-hidden a,
body:hover .visually-hidden input,
body:hover .visually-hidden button {
  display: none !important;
}

/* screen readers */

.screen-reader-text:focus,
.screen-reader-shortcut:focus  {
  clip: auto !important;
  height: auto !important;
  width: auto !important;
  display: block;
  font-size: 1em;
  font-weight: bold;
  padding: 15px 23px 14px;
  background: #fff;
  z-index: 100000;
  text-decoration: none;
  box-shadow: 0 0 2px 2px rgba(0,0,0,.6);
}


/*
   Skip links
   ========================================================================== */

.skip-link {
  position: fixed;
  z-index: 20;
  margin: 0;
  font-family: $sans-serif;
  white-space: nowrap;
}

.skip-link li {
  height: 0;
  width: 0;
  list-style: none;
}


/*
   Type
   ========================================================================== */

/* center align */

.center {
  text-align: center;
}


/*
   Alignment
   ========================================================================== */

/* clearfix */

.cf { clear: both; }


/*
   Images
   ========================================================================== */

/* image align left */

.align-left {
  display: block;
  margin-left: auto;
  margin-right: auto;

  @include breakpoint($small) {
    float: left;
    margin-right: 1em;
  }
}

/* image align right */

.align-right {
  display: block;
  margin-left: auto;
  margin-right: auto;

  @include breakpoint($small) {
    float: right;
    margin-left: 1em;
  }
}

/* file page content container */

.full {
  @include breakpoint($large){
    margin-right: -1 * $right-sidebar-width;
  }
}

/*
   Icons
   ========================================================================== */

.icon {
  display: inline-block;
  fill: currentColor;
  width: 1em;
  height: 1.1em;
  line-height: 1;
  position: relative;
  top: -0.1em;
  vertical-align: middle;
}


/*
   Navicons
   ========================================================================== */

$navicon-width  : 32px;
$navicon-height : 4px;

.navicon {
  position: relative;
  width: $navicon-width;
  height: $navicon-height;
  background: #fff;
  margin: auto;
  transition: 0.3s;

  &:before,
  &:after {
    content: "";
    position: absolute;
    left: 0;
    width: $navicon-width;
    height: $navicon-height;
    background: #fff;
    transition: 0.3s;
  }

  &:before {
    top: (-2 * $navicon-height);
  }

  &:after {
    bottom: (-2 * $navicon-height);
  }
}

.close .navicon {
  // hide the middle line
  background: transparent;

  // overlay the lines by setting both their top values to 0
  &:before, &:after{
    transform-origin: 50% 50%;
    top: 0;
    width: $navicon-width;
  }

  // rotate the lines to form the x shape
  &:before{
    transform: rotate3d(0,0,1,45deg);
  }
  &:after{
    transform: rotate3d(0,0,1,-45deg);
  }
}


/*
   Sticky, fixed to top content
   ========================================================================== */

.sticky {
  @include breakpoint($medium) {
    @include clearfix();
    position: -webkit-sticky;
    position: sticky;
    top: 3em;

    > * {
      display: block;
    }
  }
}


/*
   Wells
   ========================================================================== */

.well {
  min-height: 20px;
  padding: 19px;
  margin-bottom: 20px;
  background-color: #f5f5f5;
  border: 1px solid #e3e3e3;
  border-radius: $border-radius;
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.05);
}


/*
   Footnotes
   ========================================================================== */

.footnotes {
  ol, li, p {
    margin-bottom: 0;
    font-size: 14px;
  }
}