@charset "UTF-8";

/// Converts shorthand to the 4-value syntax.
///
/// @param {List} $shorthand
///
/// @example scss - Usage
///   .element {
///     margin: unpack(1em 2em);
///   }
///
/// @example css - CSS Output
///   .element {
///     margin: 1em 2em 1em 2em;
///   }

@function unpack($shorthand) {
    @if length($shorthand) == 1 {
        @return nth($shorthand, 1) nth($shorthand, 1) nth($shorthand, 1) nth($shorthand, 1);
    } @else if length($shorthand) == 2 {
        @return nth($shorthand, 1) nth($shorthand, 2) nth($shorthand, 1) nth($shorthand, 2);
    } @else if length($shorthand) == 3 {
        @return nth($shorthand, 1) nth($shorthand, 2) nth($shorthand, 3) nth($shorthand, 2);
    } @else {
        @return $shorthand;
    }
}