.article-page {
    &.hide-sidebar-sm .left-sidebar {
        display: none;

        @include respond(md) {
            display: inherit;
        }
    }

    .main-article {
        background: var(--card-background);
        border-radius: var(--card-border-radius);
        box-shadow: var(--shadow-l1);
        overflow: hidden;

        .article-header {
            .article-image {
                img {
                    height: auto;
                    width: 100%;
                    max-height: 50vh;
                    object-fit: cover;
                }
            }

            .article-details {
                padding: var(--card-padding);
                padding-bottom: 0;
            }
        }

        .article-content {
            margin: var(--card-padding) 0;
            color: var(--card-text-color-main);

            .footnotes {
                font-family: var(--base-font-family);
            }

            img {
                max-width: 100%;
                height: auto;
            }
        }

        .article-footer {
            margin: var(--card-padding);
            gap: var(--spacing-2xl);
        }
    }
}

.toc-nav {
    overflow-x: auto;
    max-height: 75vh;

    ol,
    ul {
        margin: 0;
        padding: 0;
    }

    ol {
        list-style-type: none;
        counter-reset: item;

        li a:first-of-type::before {
            counter-increment: item;
            content: counters(item, ".") ". ";
            font-weight: bold;
            margin-right: 5px;
        }
    }

    &>ul {
        padding: 0 1em;
    }

    li {
        margin: var(--spacing-md) 0 var(--spacing-md) var(--spacing-lg);
        padding: var(--spacing-xs);

        &>ol,
        &>ul {
            margin-top: var(--spacing-sm);
            padding-left: var(--spacing-sm);
            margin-bottom: calc(var(--spacing-xs) * -1);

            &>li:last-child {
                margin-bottom: 0;
            }
        }
    }

    li.active-class>a {
        border-left: var(--heading-border-size) solid var(--accent-color);
        font-weight: bold;
    }

    ul li.active-class>a {
        display: block;
    }

    @function repeat($str, $n) {
        $result: "";

        @for $_ from 0 to $n {
            $result: $result + $str;
        }

        @return $result;
    }

    // Support up to 6 levels of indentation for lists in ToCs
    @for $i from 0 to 5 {
        &>ul #{repeat("> li > ul", $i)}>li.active-class>a {
            $n: 25 + $i * 35;
            margin-left: calc(-#{$n}px - 1em);
            padding-left: calc(#{$n}px + 1em - var(--heading-border-size));
        }

        &>ol #{repeat("> li > ol", $i)}>li.active-class>a {
            $n: 9 + $i * 35;
            margin-left: calc(-#{$n}px - 1em);
            padding-left: calc(#{$n}px + 1em - var(--heading-border-size));
            display: block;
        }
    }
}

.widget--toc,
.article-toc {
    display: flex;
    flex-direction: column;
    color: var(--card-text-color-main);
}

.widget--toc {
    background-color: var(--card-background);
    border-radius: var(--card-border-radius);
    box-shadow: var(--shadow-l1);
    overflow: hidden;
}

.article-toc {
    padding: 0 var(--card-padding);
    margin-top: var(--spacing-lg);

    @include respond(lg) {
        display: none;
    }

    details {
        background-color: var(--card-background);
        border-radius: var(--card-border-radius);
        box-shadow: var(--shadow-l2);

        &[open] {
            .article-toc-title {
                svg {
                    transform: rotate(90deg);
                }
            }
        }

        summary {
            list-style: none;
            padding: var(--spacing-md) var(--spacing-lg);
            cursor: pointer;

            &::-webkit-details-marker {
                display: none;
            }

            .article-toc-title {
                display: flex;
                align-items: center;
                gap: var(--spacing-sm);
                text-transform: uppercase;
                font-size: 1.4rem;
                font-weight: bold;
                color: var(--card-text-color-tertiary);

                svg {
                    width: 20px;
                    height: 20px;
                    stroke-width: 1.33;
                    transition: transform 0.3s ease;
                }
            }
        }
    }
}

.article-content {
    font-family: var(--article-font-family);
    font-size: var(--article-font-size);
    padding: 0 var(--card-padding);
    line-height: var(--article-line-height);

    &>p {
        margin: 1.5em 0;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        margin-inline-start: calc((var(--card-padding)) * -1);
        padding-inline-start: calc(var(--card-padding) - var(--heading-border-size));
        border-inline-start: var(--heading-border-size) solid var(--accent-color);
        position: relative;

        a.header-anchor {
            transition: opacity 0.3s ease;
            opacity: 0;
            position: absolute;
            left: 0;
            width: var(--card-padding);
            text-align: center;
            color: var(--accent-color);

            &:before {
                content: "#";
            }
        }

        &:hover,
        &:focus {
            a.header-anchor {
                opacity: 1;
            }
        }
    }

    figure {
        text-align: center;

        figcaption {
            font-size: 1.4rem;
            color: var(--card-text-color-secondary);
        }
    }

    blockquote {
        position: relative;
        margin: 1.5em 0;
        border-inline-start: var(--blockquote-border-size) solid var(--card-separator-color);
        padding: var(--spacing-md) calc(var(--card-padding) - var(--blockquote-border-size));
        background-color: var(--blockquote-background-color);

        .cite {
            display: block;
            text-align: right;
            font-size: 0.75em;

            a {
                text-decoration: underline;
            }
        }
    }

    blockquote.alert {
        .alert-header {
            display: flex;
            align-items: center;
            gap: 0.5em;
            font-weight: bold;
        }

        .alert-body {
            > :last-child {
                margin-bottom: 0;
            }
        }

        $alert-types: note, tip, important, warning, caution;

        @each $type in $alert-types {
            &.alert-#{$type} {
                border-color: var(--alert-#{$type}-color);
                background-color: var(--alert-#{$type}-background);

                .alert-title {
                    color: var(--alert-#{$type}-color);
                }
            }
        }
    }

    hr {
        width: 100px;
        margin: 40px auto;
        background: var(--card-text-color-tertiary);
        height: 2px;
        border: 0;
        opacity: 0.55;
    }

    code {
        color: var(--code-text-color);
        background-color: var(--code-background-color);
        padding: 2px 4px;
        border-radius: var(--tag-border-radius);
        font-family: var(--code-font-family);
    }

    a,
    code {
        word-break: break-word;
    }

    .gallery {
        position: relative;
        display: flex;
        flex-direction: row;
        justify-content: center;
        margin: 1.5em 0;
        gap: var(--spacing-sm);

        figure {
            margin: 0;
        }
    }

    pre {
        overflow-x: auto;
        display: block;
        background-color: var(--pre-background-color);
        color: var(--pre-text-color);
        font-family: var(--code-font-family);
        line-height: 1.428571429;
        word-break: break-all;
        padding: var(--card-padding);

        //  keep Codeblocks LTR
        [dir="rtl"] & {
            direction: ltr;
        }

        code {
            color: unset;
            border: none;
            background: none;
            padding: 0;
        }
    }

    .highlight {
        background-color: var(--pre-background-color);
        padding: var(--card-padding);
        position: relative;

        pre {
            background-color: transparent;
        }

        &:hover {
            .copyCodeButton {
                opacity: 1;
            }
        }

        // keep Codeblocks LTR
        [dir="rtl"] & {
            direction: ltr;
        }

        pre {
            padding: 0;
            margin: 0;
            width: auto;
        }
    }

    .copyCodeButton {
        position: absolute;
        top: calc(var(--card-padding));
        right: calc(var(--card-padding));
        background: var(--card-background);
        border: none;
        box-shadow: var(--shadow-l2);
        border-radius: var(--tag-border-radius);
        padding: 8px 16px;
        color: var(--card-text-color-main);
        cursor: pointer;
        font-size: 14px;
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .table-wrapper {
        padding: 0 var(--card-padding);
        overflow-x: auto;
        display: block;
    }

    table {
        width: 100%;
        border-collapse: collapse;
        border-spacing: 0;
        margin-bottom: 1.5em;
        font-size: 0.96em;
    }

    th,
    td {
        text-align: left;
        padding: 4px 8px 4px 10px;
        border: 1px solid var(--table-border-color);
    }

    td {
        vertical-align: top;
    }

    tr:nth-child(even) {
        background-color: var(--tr-even-background-color);
    }

    .twitter-tweet {
        color: var(--card-text-color-main);
    }

    .video-wrapper {
        position: relative;
        width: 100%;
        height: 0;
        padding-bottom: 56.25%;
        overflow: hidden;

        &>iframe,
        &>video {
            position: absolute;
            width: 100%;
            height: 100%;
            left: 0;
            top: 0;
            border: 0;
        }
    }

    .gitlab-embed-snippets {
        margin: 0 !important;

        .file-holder.snippet-file-content {
            margin-block-end: 0 !important;
            margin-block-start: 0 !important;
            margin-left: calc((var(--card-padding)) * -1) !important;
            margin-right: calc((var(--card-padding)) * -1) !important;
            padding: 0 var(--card-padding) !important;
        }
    }

    /// Negative margins
    blockquote,
    figure,
    .highlight,
    pre,
    .gallery,
    .video-wrapper,
    .table-wrapper,
    .s_video_simple {
        margin-left: calc((var(--card-padding)) * -1);
        margin-right: calc((var(--card-padding)) * -1);
        width: calc(100% + var(--card-padding) * 2);
    }

    /// Make long KaTeX equations scrollable in the x-axis
    .katex-display>.katex {
        overflow-x: auto;
        overflow-y: hidden;
    }

    kbd {
        border: 1px solid var(--kbd-border-color);
        font-weight: bold;
        font-size: 0.9em;
        line-height: 1;
        padding: 2px 4px;
        border-radius: 4px;
        display: inline-block;
    }
}