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// FUNCTIONS

// Text Contrast
@function text-contrast($background)
	@if lightness($background) < 50%
		@return lighten($background, 70%)
	@else
		@return darken($background, 70%)

// Set Text Color
@function set-text-color($color)
	@if lightness($color) > 50
		@return #000
	@else
		@return #fff

//Convert pixels to ems
@function em($pixels, $context: $font-size)
  @if (unitless($pixels))
    $pixels: $pixels * 1px

  @if (unitless($context))
    $context: $context * 1px

  @return $pixels / $context * 1em