// exponentially increase a value
@function pow($ratio, $exponent) {
    $value: 1;

    @if type-of($ratio) != "number" {
        @warn "`#{$ratio}` is not a number. The 'pow' function requires a number for the ratio value";
        @return false;
    }

    @if type-of($exponent) != "number" {
        @warn "`#{$exponent}` is not a number. The 'pow' function requires a number for the exponent value";
        @return false;
    }

    @if $exponent < 0 {
        @warn "`#{$exponent}` must be greater than 0";
        @return false;
    }

    @if $exponent > 0 {
        @for $i from 1 through $exponent {
            $value: $value * $ratio;
        }
    }

    @return $value;
}