foundation/stylus/foundation/components/keystrokes.styl

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//
// Keystroke Variables
//
$include-html-type-classes ?= $include-html-classes;

// We use these to control text styles.
$keystroke-font ?= "Consolas", "Menlo", "Courier", monospace;
$keystroke-font-size ?= emCalc(14px);
$keystroke-font-color ?= #222;
$keystroke-font-color-alt ?= #fff;
$keystroke-function-factor ?= 7%;

// We use this to control keystroke padding.
$keystroke-padding ?= emCalc(2px) emCalc(4px) emCalc(0px);

// We use these to control background and border styles.
$keystroke-bg ?= darken(#fff, $keystroke-function-factor);
$keystroke-border-style ?= solid;
$keystroke-border-width ?= 1px;
$keystroke-border-color ?= darken($keystroke-bg, $keystroke-function-factor);
$keystroke-radius ?= $global-radius;

//
// Keystroke Mixins
//

// We use this mixin to create keystroke styles.
keystroke($bg=$keystroke-bg) {
  // This find the lightness percentage of the background color.
  $bg-lightness= lightness($bg);

  background-color: $bg;
  border-color: darken($bg, $keystroke-function-factor);

  // We adjust the font color based on the brightness of the background.
  if $bg-lightness > 70% {
    color: $keystroke-font-color;
  } else {
    color: $keystroke-font-color-alt;
  }

  border-style: $keystroke-border-style;
  border-width: $keystroke-border-width;
  margin: 0;
  font-family: $keystroke-font;
  font-size: $keystroke-font-size;
  padding: $keystroke-padding;
}


if $include-html-media-classes != false {

  /* Keystroke Characters */
  .keystroke,
  kbd {
    keystroke();
    radius($keystroke-radius);
  }

}