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

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

    @return $value;
}

@mixin geometric-headings {
    $base-font-size: 16px;
    $heading-scale: 1.25;

    @for $i from 1 through 5 {
        $factor: pow($heading-scale, 5 - $i);

        h#{$i} {
            font-size: $base-font-size * $factor;
            font-family: 'Iosevka', monospace;
            font-weight: 700;
            margin-bottom: 0.25rem;
        }

        // p + h#{$i} {
        //     margin-top: 0.75rem * $factor;
        // }
    }
}

@layer typography {
    @include geometric-headings;

    .text-content,
    .text {
        line-height: 1.5;

        & > * {
            max-width: 46rem;
        }

        pre,
        code {
            background: color-mix(in lab, var(--card-base-internal, #ededed), #fff 35%) !important;
            // background: color-mix(in lab, var(--zone-color), #fff 75%) !important;
            // background: var(--code-bg, #00000022) !important;

            font-family: 'Source Code Pro', monospace;
            font-weight: 400;
            font-size: 16px;
        }

        code {
            border-radius: 0.25rem;
            padding: 0.125rem 0.3rem;
        }

        pre {
            margin: 2rem auto;

            padding: 0.5rem 1rem;

            // width: 100%;
            max-width: 80ch;

            width: fit-content;

            line-height: 1.5;

            border-radius: 0.25rem;

            box-shadow: 0.25rem 0.25rem 0 0 #333;
            border: 2px solid #333;

            code {
                padding: 0;
            }
        }

        p {
            line-height: 1.75;
            margin: 0 auto;
        }

        p + p {
            margin-top: 1rem;
        }

        h1 + p,
        h2 + p,
        h3 + p,
        h4 + p {
            margin-top: 1rem;
        }

        p:has(+ h1, + h2, + h3, + h4) {
            margin-bottom: 1rem;
        }

        strong {
            font-weight: 600;
        }

        em {
            font-style: italic;
        }

        @include geometric-headings;

        h1 {
            margin-bottom: 2rem;
            text-align: center;
        }

        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            color: #333;

            // trick to fix anchor links with sticky header
            padding-top: 7rem;
            margin-top: -6.5rem;
        }

        h1,
        h2,
        h3,
        h4,
        ol,
        ul {
            margin-left: auto;
            margin-right: auto;
        }

        a,
        a:visited {
            color: var(--zone-color, #1e6733);
            font-weight: 600;

            &:hover {
                text-decoration: underline 2px solid;
            }
        }

        @media screen and (max-width: 1024px) {
            & > * {
                margin: 0 0.75rem;
            }
        }
    }
}