:root {
    --hue: 305.85;
    --bg: oklch(0.21 0.01 var(--hue));
    --bg2: oklch(0.25 0.018 var(--hue));
    --fg: oklch(0.6 0.02 var(--hue));
    --fg2: oklch(0.75 0.02 var(--hue));
    --accent: oklch(0.55 0.12 var(--hue));
    --border-color: oklch(0.3 0.03 var(--hue));
    --btn-color: var(--accent);
    --u: 4px;
    --pad: calc(var(--u) * 12);
    --nav-gap: calc(var(--u) * 6);
    --measure: 40em;
    --font-family: "Fira Sans", sans-serif;
    --body-line: calc(var(--u) * 8);
    --body-size: calc(var(--body-line) / 1.7);
    --lg-line: calc(var(--u) * 9);
    --lg-size: calc(var(--lg-line) / 1.2);
    --md-line: calc(var(--u) * 9);
    --md-size: calc(var(--lg-line) / 1.7);
    --content-gap: var(--body-line);
    --radius: calc(var(--u) * 4);
    --lg-breakpoint: 1200px;
    --main-padding-x: calc(var(--u) * 24);
    --sidebar-padding-x: calc(var(--u) * 6);

    @media (max-width: 1500px) {
        --main-padding-x: calc(var(--u) * 12);
    }

    @media (max-width: 1200px) {
        --main-padding-x: calc(var(--u) * 4);
        --sidebar-padding-x: calc(var(--u) * 4);
    }
}

@layer base {
    :root {
        background-color: var(--bg);
        color: var(--fg);
        font-family: var(--font-family);
        font-size: var(--body-size);
        line-height: var(--body-line);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    ::selection {
        background-color: hsl(211.76deg 30% 55% / 0.5);
    }

    * {
        margin: 0;
        padding: 0;
        list-style: none;
        box-sizing: border-box;
    }

    [hidden] {
        display: none !important;
    }

    a {
        color: var(--accent);
        text-decoration: none;
    }

    h1,
    h2,
    h3,
    h4,
    h5 {
        font-size: inherit;
        line-height: inherit;
    }

    strong,
    b {
        font-weight: 500;
    }
}

@layer content {
    .content {
        display: grid;
        grid-template-columns:
            var(--main-padding-x)
            minmax(0, var(--measure))
            1fr
            var(--main-padding-x);

        & > * {
            grid-column: 2;
            margin-bottom: var(--content-gap);
        }

        & > .full {
            grid-column: 1 / 5;
            margin-bottom: var(--content-gap);
        }

        & > h1 {
            color: var(--fg2);
            font-size: var(--lg-size);
            line-height: var(--lg-line);
            font-weight: normal;
        }

        & > h2 {
            color: var(--fg2);
            font-weight: 500;
            font-size: var(--body-size);
            line-height: var(--body-line);
            text-transform: uppercase;
            margin-bottom: calc(var(--content-gap) / 2);
            letter-spacing: 0.02em;
        }

        & > :is(h1, h2):not(:first-child) {
            margin-top: var(--content-gap);
        }

        & > :is(h3, h4, h5) {
            font-weight: 500;
            font-size: var(--body-size);
            line-height: var(--body-line);
            margin-bottom: calc(var(--content-gap) / 2);
        }

        & > img {
            display: block;
            margin: var(--u) 0;
            max-width: 100%;
            overflow: hidden;
        }

        a {
            text-decoration: underline;
        }

        b {
            font-weight: var(--bold);
        }

        i {
            font-style: italic;
        }

        ul {
            display: flex;
            flex-direction: column;
            padding-left: 1em;
            gap: calc(var(--u) * 2);

            > li {
                list-style: disc;
            }
        }

        ol {
            display: flex;
            flex-direction: column;
            padding-left: 2em;

            > li {
                list-style: decimal;
            }
        }

        hr {
            background-color: var(--border-color);
            border: 0;
            height: 2px;
            margin: var(--content-gap) 0;
        }

        blockquote {
            font-style: italic;
            display: flex;
            flex-direction: column;
            gap: var(--content-gap);
        }

        & > blockquote {
            border: 1.5px solid var(--border-color);
            border-radius: var(--radius);
            margin: calc(var(--u) * 2) 0;
            padding: var(--content-gap);
        }

        table {
            border: 1px solid var(--border-color);
            margin: calc(var(--u) * 2) 0;
            width: 100%;
            border-collapse: collapse;
            grid-column: 2 / 4;
        }

        thead {
            background-color: var(--bg2);
        }

        td,
        th {
            border: 1px solid var(--border-color);
            padding: var(--u) calc(var(--u) * 2);
            vertical-align: top;
        }

        th {
            font-weight: 600;
            text-align: left;
        }

        & > pre {
            grid-column: 2 / 4;
            background-color: var(--bg2);
            border: 1px solid var(--border-color);
            padding: calc((var(--u) * 4));
            border-radius: calc(var(--u) * 2);
            overflow-x: auto;
        }

        code {
            font-family: "Fira Mono";
            background-color: var(--bg2);
            padding: calc(var(--u) / 2) var(--u);
            border-radius: var(--u);
        }
    }
}

.upper {
    text-transform: uppercase;
    font-size: calc(var(--body-size) * 0.95);
    letter-spacing: 0.02em;
}

.external {
    background-image: url(./link-external-small-ltr-progressive.svg);
    background-position: center right;
    background-repeat: no-repeat;
    background-size: 0.8em;
    padding-right: 1.2em;
}

.fg2 {
    color: var(--fg2);
}

.lg {
    font-size: var(--lg-size);
    line-height: var(--lg-line);
}

.lockup {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: calc(var(--u) * 2);
}

.icon {
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    display: block;
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.img {
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    display: block;
    object-fit: contain;
}

.page {
    --nav-height: calc(var(--u) * 16);
    --sidebar-width: calc(var(--u) * 80);

    display: block;
    width: 100vw;
    height: 100vh;
    position: relative;
    padding-left: var(--sidebar-width);
    overflow: hidden;

    .page-main {
        height: 100vh;
        overflow-x: hidden;
        overflow-y: auto;
        height: 100vh;
    }

    .page-main-header {
        background-color: var(--bg);
        border-bottom: 1px solid var(--border-color);
        display: flex;
        flex-direction: row;
        align-items: center;
        height: var(--nav-height);
        padding: 0 var(--main-padding-x);
        position: sticky;
        top: 0;
    }

    .page-main-main {
        padding: var(--pad) 0;
    }

    .page-sidebar {
        background-color: var(--bg);
        border-right: 1px solid var(--border-color);
        overflow-x: hidden;
        overflow-y: auto;
        height: 100vh;
        width: var(--sidebar-width);
        position: absolute;
        left: 0;
        top: 0;
        right: 0;
        bottom: 0;
        z-index: 2;
        transition: transform 250ms ease-out;
    }

    .page-sidebar-header {
        border-bottom: 1px solid transparent;
        position: sticky;
        top: 0;
        height: var(--nav-height);
        padding: 0 var(--sidebar-padding-x);
        background-color: var(--bg);
    }

    .page-sidebar-main {
        padding: var(--pad) var(--sidebar-padding-x);
    }

    @media (max-width: 1200px) {
        & {
            padding-left: 0;
        }

        .page-sidebar {
            border-right: 0;
            opacity: 0;
            pointer-events: none;
            width: auto;
        }

        &.sidebar-open .page-sidebar {
            opacity: 1;
            pointer-events: all;
        }
    }
}

.lg-hidden {
    @media (min-width: 1200px) {
        display: none !important;
    }
}

.lg-invisible {
    @media (min-width: 1200px) {
        visibility: hidden !important;
        pointer-events: none;
    }
}

.sticky {
    position: sticky;
}

.toolbar {
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: calc(var(--u) * 2) var(--pad);
}

.hero {
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    aspect-ratio: 16/9;
}

.sections {
    display: flex;
    flex-direction: column;
    gap: var(--content-gap);
}

.group {
    display: flex;
    flex-direction: column;
    gap: calc(var(--u) * 2);

    & > h1 {
        color: var(--fg2);
        font-size: calc(var(--body-size) * 0.95);
        font-weight: normal;
        line-height: inherit;
        text-transform: uppercase;
        letter-spacing: 0.02em;
    }

    & > ul {
        display: flex;
        flex-direction: column;
        gap: calc(var(--u) * 1);
    }
}

.lockup {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: calc(var(--u) * 4);
}

.hstack {
    display: flex;
    flex-direction: row;
    gap: calc(var(--u) * 4);

    @media (max-width: 800px) {
        flex-direction: column;
    }
}

.menu {
    display: flex;
    flex-direction: row;
    align-items: center;

    .menu-left {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: var(--nav-gap);
    }

    .menu-right {
        display: flex;
        flex-direction: row;
        align-items: center;
        margin-left: auto;
        gap: var(--item-gap);
    }
}

.search {
    --height: calc(var(--u) * 11);
    -webkit-appearance: none;
    appearance: none;
    border: 1px solid var(--border-color);
    border-radius: calc(var(--height) / 2);
    background-color: var(--border-color);
    font-size: inherit;
    line-height: 1;
    height: var(--height);
    outline: none;
    padding: calc(var(--u) * 3) calc(var(--u) * 5);
}

.btn {
    -webkit-appearance: none;
    appearance: none;
    border: 1px solid var(--btn-color);
    background-color: transparent;
    border-radius: calc(var(--u) * 2);
    color: var(--btn-color);
    font-family: inherit;
    font-size: inherit;
    height: calc(var(--u) * 12);
    padding: calc(var(--u) * 4);
    cursor: pointer;
    display: flex;
    flex-direction: row;
    align-items: center;
    width: min-content;
    white-space: nowrap;
    transition:
        box-shadow 250ms ease-out,
        background-color 250ms ease-out;
    text-decoration: none;

    &:hover {
        background-color: oklch(0.25 0.05 var(--hue));
        box-shadow:
            oklch(0.35 0.12 var(--hue)) 0px 0px 5px,
            oklch(0.35 0.12 var(--hue)) 0px 4px 16px;
    }

    &:active {
        box-shadow: none;
    }

    &:where(.primary) {
        background-color: var(--btn-color);
        color: var(--bg);
        font-weight: 500;
    }

    &:where(.primary):hover {
        background-color: var(--btn-color);
        box-shadow:
            oklch(0.35 0.12 var(--hue)) 0px 0px 1px,
            oklch(0.35 0.12 var(--hue)) 0px 0px 5px,
            oklch(0.5 0.12 var(--hue)) 0px 4px 16px;
    }

    &:active {
        box-shadow: none;
    }
}

.btn-icon {
    --size: 40px;
    -webkit-appearance: none;
    appearance: none;
    border: 1px solid var(--btn-color);
    background-color: transparent;
    border-radius: calc(var(--u) * 2);
    font-family: inherit;
    font-size: inherit;
    height: var(--size);
    cursor: pointer;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    width: var(--size);
    white-space: nowrap;
    transition: background-color 250ms ease-out;

    &:hover {
        background-color: var(--bg2);
    }

    &:active {
        background-color: var(--border-color);
    }
}

img.responsive {
    display: block;
    max-width: 100%;
    border-radius: var(--radius);
    overflow: hidden;
}