///
// Converts a pixel value to ems with a base font size of 18 px
//
// @param  {int}   $px Target pixel value
// @return {value}     Pixel value converted to ems
///
@function -cdd-em($px) {
	@return ($px / 18) * 1em;
}

///
// Converts a pixel value to rems with a base font size of 18 px
//
// @param  {int}   $px Target pixel value
// @return {value}     Pixel value converted to rems
///
@function -cdd-rem($px) {
	@return ($px / 18) * 1rem;
}

///
// Returns the correct url() to an image in assets/img
//
// @param  {string} $name Filename of the image
// @return {value}
///
@function -cdd-img-url($name) {
  @return url(-cdd-cachebuster('/assets/img/' + $name));
}

///
// Helper to embed @font-face declarations
// Inspired by https://gist.github.com/jonathantneal/d0460e5c2d5d7f9bc5e6
//
// @param {string} $name   Font name (human-readable)
// @param {string} $file   Name of the font file
// @param {int}    $weight font-weight value of the font file
// @param {string} $style  font-style value of the font file
///
@mixin -cdd-font-face($name, $file, $weight: normal, $style: normal) {
	@font-face {
		font-family: quote($name);
		font-style: $style;
		font-weight: $weight;
		src: url(-cdd-cachebuster('/assets/fonts/' + $file + '.eot')); // IE < 9
		src: url(-cdd-cachebuster('/assets/fonts/' + $file + '.eot') + '?#') format('embedded-opentype'), // IE 9
		     url(-cdd-cachebuster('/assets/fonts/' + $file + '.woff2')) format('woff2'),
		     url(-cdd-cachebuster('/assets/fonts/' + $file + '.woff')) format('woff');
		font-display: swap;
	}
}