////
/// @group tools
////

/// Convert pixels to em
///
/// @param {Number} $value - Length in pixels
/// @param {Number} $context-font-size - Font size of element
/// @return {Number} Length in ems
/// @access public

@function govuk-em($value, $context-font-size) {
  @if (unitless($value)) {
    $value: $value * 1px;
  }
  @if (unitless($context-font-size)) {
    $context-font-size: $context-font-size * 1px;
  }
  @return $value / $context-font-size * 1em;
}