/**
 * UIBUILDER MarkWeb Theme - Base Styles
 * NOTE: UIBUILDER default styles should be pre-loaded in HTML (optional but recommended for consistent theming)
 *
 * Version: 2026-04-27
 * Author: Julian Knight (Totally Information)
 */

/* Import highlight.js styles for code blocks */
/* @import url('./hjs-styles/night-owl-jk.min.css'); JK's version of Night Owl, with tweaked comment color */
@import url('./hjs-styles/monokai-sublime.min.css');

:root {
    /* Currently only set up for dark mode. */
    color-scheme: dark;

    --brand-hue: 201; /* Slightly different to uib-brand, close to uib docs */
    --base-bg-sat: 18%;
    --base-bg-light: 19%;
    /* --base-bg: var(--surface1, hsl(var(--brand-hue), var(--base-bg-sat), var(--base-bg-light))); */
    --base-bg: hsl(var(--brand-hue), var(--base-bg-sat), var(--base-bg-light));
    --base-fg: var(--text2);
    --base-accent: var(--primary);
    --code-bg: hsl(207, 43%, 10%);

    /* The layout container */
    --container-max-width: 100em;

    /* The Sidebar container */
    --sidebar-min-width: 5em;
    --sidebar-max-width: 15em;
    --sidebar-border-color: var(--text3);
    --sidebar-active-border-color: var(--primary);
    --sidebar-hover-bg: hsl(var(--brand-hue), var(--base-bg-sat), 22%);

    --blockquote-bg: hsl(207, 63%, 10%);
    --blockquote-highlight: hsl(204, 90%, 45%);

    --pad-left-right: 1em;

    /* #region horizontal menu settings */
    --menu-bg: hsl(var(--brand-hue), var(--base-bg-sat), 15%); /*var(--surface3);*/
    --menu-bg-hover: hsl(210, 100%, 95%);
    --menu-bg-active: hsl(210, 100%, 90%);
    --menu-bg-parent-active-1: hsl(210, 80%, 94%);
    --menu-bg-parent-active-2: hsl(210, 60%, 96%);
    --menu-bg-parent-active-3: hsl(210, 40%, 97%);
    --menu-text: var(--text1);
    --menu-text-hover: hsl(210, 100%, 40%);
    --menu-border: hsl(220, 15%, 85%);
    --menu-shadow: hsla(220, 20%, 20%, 0.15);
    --menu-transition: 0.2s ease;
    --menu-item-padding: 0.75rem 1rem;
    --menu-min-width: 12rem;
    --menu-breakpoint: 768px;
    --menu-z-index: 1000;
    /* #endregion horizontal menu settings */
}

html {
    color: var(--base-fg);
    background-color: var(--base-bg);
    accent-color: var(--base-accent);
    font-size: 1em;
}

body {
    margin:0;
}

/* Heading styles with bottom border */
h2, h3, h4, h5, h6 {
    width: 100%;
    border-bottom: 1px solid var(--text3);
    padding-bottom: 0.3em;

    a[href^="#"] {
        color: inherit;
        text-decoration: none;
    }
}

ul, ol {
    margin: 0.5em 0;
    padding-left: 1em;
}

code {
    background-color: var(--code-bg);
    padding: 0.1em 0.4em;
    border-radius: 0.25em;
    /* font-size: 0.875em; */
}

pre {
    position: relative;
    overflow-x: auto;

    > code {
        max-width: 100%;
        font-size: inherit;
        padding: 0.5em 0.5em;
        display: block;
    }

    /* Show language label on hover for code blocks with a language-* class */
    &[data-language]::after {
        content: attr(data-language);
        position: absolute;
        top: 0;
        right: 0;
        padding: 0.1em 0.5em;
        font-size: 0.75em;
        color: var(--text3);
        background-color: var(--code-bg);
        border-radius: 0 0.25em 0 0.25em;
        pointer-events: none;
        opacity: 0;
        transition: opacity var(--menu-transition);
    }
    &[data-language]:hover::after {
        opacity: 1;
    }
}

/* Container layout using CSS Grid */
#markweb {
    width: 100%;
    max-width: var(--container-max-width);
    margin:0;
    display: grid;
    height: 100dvh;
    overflow: hidden;

    /* 3 cols x 1 row layout. Sidebar constrained min/max, main column takes remaining space */
    gap: 0;
    grid-template-columns:
        minmax(var(--sidebar-min-width), var(--sidebar-max-width))
        5px
        1fr;
    grid-template-areas:
        "sidebar drag main";
    justify-items: stretch;
    transition: grid-template-columns 0.3s ease;

    /* Hide the sidebar column when the toggle input is checked */
    &:has(#sidebar-toggle input:checked) {
        grid-template-columns: 0px 5px 1fr;

        #sidebar {
            overflow: hidden;
            opacity: 0;
        }
    }
}

/* Where you put your content */
main {
    --header-title-max-size: 2em;
    --header-title-min-size: 1em;
    --header-title-scroll-range: 18rem;
    --header-desc-max-size: 1em;
    --header-desc-min-size: 0;

    grid-area: main;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    overflow: hidden;
    min-height: 0;
    padding: 0;
    timeline-scope: --markweb-main-scroll;

    #search-results {
        /* position: absolute; */
        /* top: 100%; */
        /* left: 0; */
        /* right: 0; */
        /* background: hsl(0, 0%, 100%); */
        border: 1px solid hsl(0, 0%, 80%);
        border-radius: var(--border-radius, 0.25rem);
        max-height: 20em;
        overflow-y: auto;
        /* z-index: calc(var(--menu-z-index) + 1); */
        /* box-shadow: 0 4px 6px hsla(0, 0%, 0%, 0.1); */

        #search-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.5rem 0.75rem;
            /* background: hsl(210, 20%, 95%); */
            border-bottom: 1px solid var(--surface3);
            font-weight: 500;

            span:first-child {
                display: inline-block;
                font-size: 0.9rem;
            }
            .search-close {
                display: inline-block;
                cursor: pointer;
                margin-inline-start: 1px;
                margin-inline-end: 3px;
                -webkit-user-modify: read-only !important;
                user-select: none !important;
                background: transparent;
                border: none;
                box-shadow: none;
                padding: 0.25rem 0.5rem;
                font-size: 1.25rem;
                line-height: 1;
                transition: background-color 0.15s ease, color 0.15s ease;
            }
            .search-close:hover,
            .search-close:focus {
                background: hsl(0, 0%, 90%);
                color: hsl(0, 0%, 20%);
            }
        }
        #search-details {
            a {
                display: block;
                padding: 0.75rem;
                text-decoration: none;
                border-bottom: 1px solid hsl(0, 0%, 90%);
            }
            a:hover { background: hsl(210, 50%, 15%); }
            a:last-child { border-bottom: none; }
            .no-results { padding: 0.75rem; color: hsl(0, 0%, 50%); }

            /* Highlight search result matching current page */
            a.search-result-active {
                /* background: hsl(210, 60%, 92%); */
                border-left: 3px solid hsl(210, 100%, 45%);
                padding-left: calc(0.75rem - 3px);
            }
            a.search-result-active:hover {
                background: hsl(210, 60%, 85%);
            }
            a.search-result-active strong {
                color: hsl(210, 100%, 30%);
            }
        }
    }

    /* Main content body - markdown-rendered pages, etc */
    > section { /* For footnotes */
        overflow-y: auto;
        min-height: 0;
        /* margin-inline-end: -0.5em; */
        padding-inline-start: var(--pad-left-right);
        padding-inline-end: var(--pad-left-right);
        scroll-timeline-name: --markweb-main-scroll;
        scroll-timeline-axis: block;
    }

    div[data-attribute="body"] {
        p, div {
            margin-inline-start: 0;
            margin-inline-end: 0;
        }
    }

    header, footer {
        background-color: hsl(from var(--base-bg) h s 25%);
    }

    /* At bottom, (c), dates, etc */
    footer {
        z-index: 10;
        margin: 0.5em 0 0 0;
        padding: 0.5em var(--pad-left-right);
        font-size: 86%;
    }

    /* Title, nav, etc */
    header {
        position: sticky;
        top: 0;
        z-index: 10;
        margin: 0 0 0.5em 0;
        padding: 0.5em var(--pad-left-right);

        > h1 {
            font-size: var(--header-title-max-size);
            margin-block-start: 0.1em;
            margin-block-end: 0.3em;
        }
    }

}

@keyframes markweb-header-scroll {
    from {
        margin: 0 0 0.5em 0;
        padding: 0.5em var(--pad-left-right);
    }
    to {
        margin: 0;
        padding: 0 var(--pad-left-right);
    }
}
@keyframes markweb-header-title-shrink {
    from {
        font-size: var(--header-title-max-size);
    }
    to {
        font-size: var(--header-title-min-size);
        margin-top: 0;
    }
}
@keyframes markweb-header-desc-shrink {
    from {
        font-size: var(--header-desc-max-size);
    }
    to {
        font-size: var(--header-desc-min-size);
        margin-top: 0;
    }
}
@keyframes markweb-footer-scroll {
    from {
        margin: 0.5em 0 0 0;
        padding: 0.5em var(--pad-left-right);
        font-size: 86%;
    }
    to {
        margin: 0;
        padding: 0 var(--pad-left-right);
        font-size: 73%;
    }
}

@supports (animation-timeline: --markweb-main-scroll) {
    main {
        > header {
            animation-name: markweb-header-scroll;
            animation-duration: 1s;
            animation-timing-function: linear;
            animation-fill-mode: both;
            animation-timeline: --markweb-main-scroll;
            animation-range: 0 var(--header-title-scroll-range);
            > h1 {
                animation-name: markweb-header-title-shrink;
                animation-duration: 1s;
                animation-timing-function: linear;
                animation-fill-mode: both;
                animation-timeline: --markweb-main-scroll;
                animation-range: 0 var(--header-title-scroll-range);
            }
            > blockquote, > div {
                animation-name: markweb-header-desc-shrink;
                animation-duration: 1s;
                animation-timing-function: linear;
                animation-fill-mode: both;
                animation-timeline: --markweb-main-scroll;
                animation-range: 0 var(--header-title-scroll-range);
            }
        }
        > footer {
            animation-name: markweb-footer-scroll;
            animation-duration: 1s;
            animation-timing-function: linear;
            animation-fill-mode: both;
            animation-timeline: --markweb-main-scroll;
            animation-range: 0 var(--header-title-scroll-range);
        }
    }
}

#markweb:has(#sidebar-toggle input:checked) main > header > h1 {
    left: calc(5px + 1.5em);
}

/* Active link indicator for leaf pages (not folder summary elements) */
.active-link:not(summary) {
    border-left: 3px solid var(--sidebar-active-border-color);
    padding-left: calc(0.75rem - 3px);
    font-style: italic;
}

/* For folder items (details/summary), put the border after the disclosure triangle */
summary.active-link > a {
    display: inline-block;
    border-left: 3px solid var(--sidebar-active-border-color);
    padding-left: calc(0.75rem - 3px);
    font-style: italic;
}

/* Sidebar container */
#sidebar {
    grid-area: sidebar;
    overflow-y: auto;
    min-height: 0;
    margin-left: 1em;
    margin-top: 0.5em;
    padding-right: 0.5em;
    transition: opacity 0.3s ease;

    /* Sidebar tab selectors (buttons) */
    .sidebar-tabs {
        display: flex;
        border-bottom: 1px solid var(--sidebar-border-color);
        flex-shrink: 0;
        margin-bottom: 1em;
    }
    .sidebar-tab {
        flex: 1;
        padding: 0.75rem 0.5rem;
        background: transparent;
        border: none;
        box-shadow: none;
        border-radius: 0;
        border-bottom: 2px solid transparent;
        cursor: pointer;
    }
    .sidebar-tab:hover {
        background: var(--sidebar-hover-bg);
    }
    .sidebar-tab.active, .sidebar-tab[aria-selected="true"] {
        border-bottom-color: var(--sidebar-active-border-color);
        background: var(--sidebar-hover-bg);
    }

    ul {
        list-style: none;
        margin: 0;
        padding: 0;
        border-left: 1px dashed hsl(from var(--text3) h s l / 30%);

        ul {
            margin-left: 1em;
        }
    }
    li {
        margin: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;

        summary {
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-weight: bolder;
        }

        a {
            text-decoration: none;
            color: inherit;
        }
    }

    #search-form {
        width: 100%;
        margin: 0;
        padding: 5px;
        border: none;
    }
    #search-header {
        padding: 0 0.3em;
        border: none;

        display: flex;
        justify-content: space-between;
        align-items: center;
        
        span:first-child {
            display: inline-block;
            font-size: 0.9rem;
        }
        .search-close {
            -webkit-user-modify: read-only !important;
            user-select: none !important;
            background: transparent;
            border: none;
            box-shadow: none;
            padding: 0.25rem 0.5rem;
            font-size: 1.25rem;
            line-height: 1;
            transition: background-color 0.15s ease, color 0.15s ease;
        }
        /* .search-close:hover,
        .search-close:focus {
            background: hsl(0, 0%, 90%);
            color: hsl(0, 0%, 20%);
        } */
    }
    #sidebar-toc {
        background-color: inherit;
        border-radius: 0;
        box-shadow: none;
    }
    .toc-active {
        border-left: 3px solid var(--sidebar-active-border-color);
        padding-left: calc(0.75rem - 3px);
    }

    .search-result { /* a */
        display: block;
        padding: 0.3em;
        color: inherit;
        line-height: 1;
        text-decoration: none;
        border-bottom: 1px solid hsl(0, 0%, 90%);
        border-left: 3px solid transparent;

        strong {
            display: block;
            font-size: 0.8em;
        }
        small {
            font-size: 0.7em;
        }
    }
    .search-result-active {
        border-left: 3px solid hsl(210, 100%, 45%);
    }

    article {
        margin: 0;
        border: none;
        padding: 0;
        border-radius: 0;
    }
}
#sidebar-toggle {
    position: absolute;
    background: var(--base-bg);
    top: 0.3em;
    width: 1rem;
    height: 0.8rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;

    input {
       display: none;
    }

    span {
        height: 3px;
        width: 100%;
        background: var(--text3);
        border-radius: 2px;
        transition: transform 0.3s ease, opacity 0.2s ease;
    }

    /* input:checked ~ span:nth-child(2) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    input:checked ~ span:nth-child(3) {
        opacity: 0;
    }

    input:checked ~ span:nth-child(4) {
        transform: rotate(-45deg) translate(6px, -6px);
    } */
}
/* Resizer handle: placed in the grid area between sidebar and main */
#sidebar-resizer {
    position: relative;
    grid-area: drag;
    /* cursor: ew-resize; */
    cursor: col-resize;
    background: hsl(var(--brand-hue), var(--base-bg-sat), 10%);
    user-select: none;
    z-index: 20;
}
#sidebar-resizer:focus-visible {
    outline: 2px solid hsl(var(--brand-hue), 80%, 55%);
    outline-offset: -2px;
}

/* Tree view styles (e.g. %%index%% index listings) */
.tree {
    margin: 0.5em 0;
    padding: 0;
    max-width: 100%;
    list-style: none;

    .tree-folder {
        list-style: none;
        border-left: 1px dashed hsl(from var(--text3) h s l / 30%);
        ul {
            padding-left: 1em;
            list-style: circle;
            li:not(.tree-folder) {
                margin-left: 1em;
            }
        }
    }
    summary {
        font-weight: bolder;
        color: var(--text3)
    }
}

/* Main content collapsible sections */
.collapsible-section:not(ul) {
    /* --collapsible-marker: '\00a0'; */
    position: relative;
    margin-top: 0.5em;
    margin-bottom: 0.75em;
    /* Marker sits inside the container's left padding; content indented to align with heading text */
    padding-left: 1.2em;

    /* Cancel the parent's padding-left for nested sections so all levels align */
    & .collapsible-section:not(ul) {
        margin-left: -1.2em;
    }

    > summary {
        /* list-style: var(--collapsible-marker, none); */
        list-style: none;
        cursor: pointer;
        position: relative;
        display: flex;
        align-items: center;

        h2, h3, h4, h5, h6 {
            margin: 0;
            border-bottom: none;
        }

        &::before {
            content: var(--collapsible-marker, '▶');
            /* content: var(--collapsible-marker, ''); */
            font-family: system-ui, sans-serif;
            position: absolute;
            left: -2em;
            width: 1em;
            text-align: center;
            font-size: 0.65em;
            top: 50%;
            translate: 0 -50%;
            transition: rotate 0.2s ease;
        }
    }

    &[open] > summary::before {
        rotate: 90deg;
    }

    /* --cs-start-hue: 203; */
    --cs-start-hue: 41;
    --cs-hue-step: 25;
    --cs-sat: 48%;
    --cs-lum: 50%;
    --cs-transparency: 0.2;

    /* Set border color and font size based on nesting level (up to 6 levels, level 1 = H2), sizes based on std browser h_ levels */
    &[data-level="1"] > summary { 
        border-bottom: 6px solid hsl(var(--cs-start-hue) var(--cs-sat) var(--cs-lum) / var(--cs-transparency));
    }
    &[data-level="2"] > summary {
        border-bottom: 5px solid hsl(calc(var(--cs-start-hue) + var(--cs-hue-step)) var(--cs-sat) var(--cs-lum) / var(--cs-transparency));
    }
    &[data-level="3"] > summary {
        border-bottom: 4px solid hsl(calc(var(--cs-start-hue) + 2 * var(--cs-hue-step)) var(--cs-sat) var(--cs-lum) / var(--cs-transparency));
    }
    &[data-level="4"] > summary {
        border-bottom: 3px solid hsl(calc(var(--cs-start-hue) + 3 * var(--cs-hue-step)) var(--cs-sat) var(--cs-lum) / var(--cs-transparency));
    }
    &[data-level="5"] > summary {
        border-bottom: 2px solid hsl(calc(var(--cs-start-hue) + 4 * var(--cs-hue-step)) var(--cs-sat) var(--cs-lum) / var(--cs-transparency));
    }
    &[data-level="6"] > summary {
        border-bottom: 1px solid hsl(calc(var(--cs-start-hue) + 5 * var(--cs-hue-step)) var(--cs-sat) var(--cs-lum) / var(--cs-transparency));
    }
}

/* #region Blockquotes & GFM Alert Box Styles (markdown-it plugin) */
blockquote, .markdown-alert {
    padding: 0.5em 1em 0.5em 1em;
    margin: 0.5em 0 1em 0;
    color: inherit;
    background-color: var(--blockquote-bg);
    border-left: 0.25em solid var(--blockquote-highlight);

    p {
        margin: 0.6em 0;
    }
    p:last-child {
        margin-bottom: 0;
    }
}
.markdown-alert {
    --blockquote-highlight: hsl(213, 12%, 30%);

    .markdown-alert-title {
        display: inline-flex;
        margin: 0 0 !important;
        align-items: center;
        font-weight: 500;
        color: var(--blockquote-highlight);
        fill: var(--blockquote-highlight);
    }

}
.octicon {
    margin: 0.3em 0.5em 0.3em 0;
}
.markdown-alert-note {
    --blockquote-highlight: hsl(213, 89%, 64%);
}
.markdown-alert-tip {
    --blockquote-highlight: hsl(122, 33%, 51%);
}
.markdown-alert-important {
    --blockquote-highlight: hsl(262, 67%, 66%);
}
.markdown-alert-warning {
    --blockquote-highlight: hsl(40, 68%, 46%);
}
.markdown-alert-caution {
    --blockquote-highlight: hsl(3, 75%, 60%);
}
/* #endregion Blockquotes & GFM Alert Box Styles */

/* #region Task List Styles (markdown-it plugin) */
.contains-task-list {
    list-style: none;
    padding-inline-start: 0;
    margin-inline-start: 0;

    .contains-task-list {
        margin-inline-start: 1.5em;
    }
}
.task-list-item {
    list-style: none;
    --task-check-col: 1.1em;
    --task-check-gap: 0.75em;
}
.task-list-item > :not(:first-child) {
    margin-inline-start: calc(var(--task-check-col) + var(--task-check-gap));
}
.task-list-item-label {
    display: grid;
    grid-template-columns: var(--task-check-col) minmax(0, 1fr);
    align-items: start;
    column-gap: var(--task-check-gap);
}
.task-list-item-text {
    min-width: 0;
}
.task-list-item-checkbox {
    margin: 0.25em 0 0;
}
/* #endregion Task List Styles */

/* Accessibility: Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--text1);
    color: var(--surface1);
    padding: 8px 12px;
    z-index: 1000;
    text-decoration: none;

    &:focus {
        top: 0;
    }
}

/* Visible status blockquote styling - defaults to hidden */
.visible-status {
    display: none;

    /* Show the blockquote if it contains children with content */
    &:has(> :not(:empty)) {
        display: block;
    }
}

/* Unknown frontmatter variable styling {{unknown}} */
.variable-unknown {
    color: hsl(0, 100%, 70%);
    font-style: italic;
}

/* Tweak Mermaid diagram styling */
.mermaid > svg {
    margin: 0;
}

/* #region Footnote Styles (markdown-it-footnote plugin) */
.footnotes-sep {
    margin-block-start: 2rem;
    border: none;
    border-block-start: 1px solid hsl(0 0% 50% / 0.4);
}

.footnotes {
    font-size: 0.875em;
    color: var(--text2, inherit);

    ol {
        padding-inline-start: 1.5em;
    }

    li {
        margin-block: 0.25em;
    }

    /* Back-reference arrow */
    .footnote-backref {
        text-decoration: none;
        margin-inline-start: 0.25em;

        &:hover {
            text-decoration: underline;
        }
    }
}

/* Inline footnote reference superscript */
.footnote-ref a {
    text-decoration: none;
    font-size: 0.75em;
    vertical-align: super;
    line-height: 1;

    &:hover {
        text-decoration: underline;
    }
}
/* #endregion Footnote Styles */

/* #region ?? STILL NEEDED ?? Base Menu Styles */
nav.horizontal {
    position: sticky;
    top: 0;
    border-radius: 0;
    background: var(--menu-bg);
    /* z-index: var(--menu-z-index); */
    /* border-bottom: 1px solid var(--menu-border); */
    /* transition: var(--menu-transition); */

    ul {
        display: flex;
        flex-wrap: wrap;
        list-style: none;
        margin: 0;
        padding: 0;
        gap: 1em;
    }

    /* Hide nested ul by default, show on hover */
    ul ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        flex-direction: column;
        background: var(--menu-bg);
        border: 1px solid var(--menu-border);
        border-radius: 0.25rem;
        box-shadow: 0 4px 12px var(--menu-shadow);
        min-width: var(--menu-min-width);
        z-index: var(--menu-z-index);
        gap: 0;
    }

    /* Show nested ul on parent hover */
    li:hover > ul,
    li:focus-within > ul {
        display: flex;
    }

    /* Ensure parent li is positioned for absolute children */
    li {
        position: relative;
    }

    /* Deeply nested menus fly out to the right */
    ul ul ul {
        top: 1em;
        left: 2em;
    }
}

/* #region Burger Menu (Collapsed State) */
/* Burger icon - hidden by default, shown when .collapsed class is added via JS */
.menu-burger {
    display: none;
    position: fixed;
    top: 0.5rem;
    left: auto;
    right: auto;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0.5rem;
    background: var(--menu-bg);
    border: 1px solid var(--menu-border);
    border-radius: 0.25rem;
    box-shadow: 0 2px 8px var(--menu-shadow);
    cursor: pointer;
    z-index: calc(var(--menu-z-index) + 10);
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    opacity: 0;
    transition: opacity 1s ease, left 0.3s ease, right 0.3s ease;

    /* Burger lines */
    span {
        display: block;
        width: 1.25rem;
        height: 2px;
        background: var(--menu-text);
        border-radius: 1px;
        transition: transform 0.3s ease, opacity 0.3s ease;
    }
}

/* Default positioning: align with content area on wider screens */
@media (min-width: 769px) {
    .menu-burger {
        left: calc(100vw - 3.5rem);
    }
}

/* Mobile: position on right edge */
@media (max-width: 768px) {
    .menu-burger {
        right: 0.5rem;
    }
}

/* Show burger when nav is collapsed */
nav.horizontal.collapsed + .menu-burger,
.menu-burger.visible {
    display: flex;
    opacity: 1;
}

/* Animate burger to X when menu is open */
.menu-burger.open span:nth-child(1) {
    transform: rotate(45deg) translate(0.3rem, 0.3rem);
}
.menu-burger.open span:nth-child(2) {
    opacity: 0;
}
.menu-burger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(0.3rem, -0.3rem);
}

/* Collapsed nav state */
nav.horizontal.collapsed {
    position: fixed;
    top: 0;
    right: 0;
    width: auto;
    max-width: 80vw;
    max-height: 0;
    overflow: hidden;
    border: none;
    border-radius: 0 0 0 0.5rem;
    box-shadow: 0 4px 12px var(--menu-shadow);
    opacity: 0;
    pointer-events: none;
    transition: max-height 0.3s ease, opacity 0.2s ease;

    /* Stack items vertically */
    > ul {
        flex-direction: column;
        padding: 0.5rem;
        gap: 0;
    }

    /* Nested menus expand inline */
    ul ul {
        position: static;
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--menu-bg-hover);
        margin-left: 1rem;
        min-width: 0;
    }

    ul ul ul {
        top: 0;
        left: 0;
    }

    li {
        width: 100%;
    }

    a {
        display: block;
        padding: var(--menu-item-padding);
    }
}

/* Expanded collapsed menu (on hover/focus/click) */
nav.horizontal.collapsed.open {
    max-height: 80vh;
    overflow-y: auto;
    opacity: 1;
    pointer-events: auto;
    margin-top: 3rem; /* Below the burger icon */
}
/* #endregion Burger Menu (Collapsed State) */

/* #endregion Base Menu Styles */

/* #region Mobile/Responsive Menu Styles */
@media (max-width: 768px) {
    /* Search form in mobile menu */
    /* #search-form {
        order: -1;
        width: 100%;
        padding: 0.75rem;
        border-bottom: 1px solid var(--menu-border);
    } */

    /* #search-input {
        width: 100%;
    } */
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    .horizontal .menubar a {
        padding: 1rem;
        min-height: 44px;
    }
}

/* Print styles - hide navigation */
@media print {
    .horizontal {
        display: none !important;
    }
}
/* #endregion Mobile/Responsive Menu Styles */