@function k-var( $prefix: kendo-, $var: null, $fallback: null ) {
    $_prefix: $prefix;
    $_var: $var;
    $_fallback: $fallback;

    @if ( k-string-index( $prefix, "--" ) == 1 ) {
        $_prefix: "";
        $_var: k-string-slice( $prefix, 3 );
        $_fallback: $var;
    }

    @if not $_var {
        @return null;
    }

    @if $_prefix == null { // stylelint-disable-line
        $_prefix: "";
    }

    @if ($_fallback != null and $_fallback != "") {
        @return var( --#{$_prefix}#{$_var}, #{$_fallback} );
    }

    @return var( --#{$_prefix}#{$_var} );
}

@function k-vars( $prefix: kendo-, $vars... ) {
    $vars: k-list-reverse( $vars );
    $result: null;

    // @debug $prefix;
    @each $var in $vars {
        $result: k-var( $prefix, $var, $result );
    }

    @return $result;
}