@mixin rem($property, $px, $base: 16px) {
    // Convert the baseline into rems
    $rem: $base / 1rem;
    // Print the first line in pixel values
    #{$property}: $px;
    // If there is only one (numeric) value, return the property/value line for it.
    @if type-of($px) == "number" {
        #{$property}: $px / $rem;
    }
    @else {
        // Create an empty list that we can dump values into
        $rem-values: unquote("");
        @each $value in $px {
            // If the value is zero, return 0
            @if $value == 0 {
                $rem-values: append($rem-values, $value);
            }
            @else {
                $rem-values: append($rem-values, $value / $rem);
            }
        }
        // Return the property and its list of converted values
        #{$property}: $rem-values;
    }
}