*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;

    width: 100%;
    min-height: 100vh;

    font-family: 'Inter', 'Segoe UI', 'Helvetica', 'Arial', sans-serif;
    font-size: 16px;
}

// Headings

$base-font-size: 18px;
$heading-scale: 1.33;

@function pow($number, $exponent) {
    $value: 1;

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

    @return $value;
}

@for $i from 1 through 5 {
    h#{$i} {
        margin: 0;

        $factor: pow($heading-scale, 5 - $i);
        font-size: $base-font-size * $factor;

        line-height: 1.5;
    }
}