/* ============================================================================================
 * SITE CHROME: the page shell shared by every public page that uses cms.renderChrome() (the
 * section pages plus the Docs, Arcade and Binder add-on pages): theme defaults, page base,
 * background patterns, header, sidebar rail, mobile menu, search palette and the page title row.
 * (The site footer is in style.css, since index.html uses it too.)
 *
 * Load order matters: style.css, then this file, then the page's own <style>. A page overrides
 * a rule here by repeating its selector in its own <style>. index.html, admin.html, login.html and
 * maintenance.html do not load this file.
 * ============================================================================================ */

/* Theme defaults. cms.applyThemeVars() overrides these on <html> from the saved settings. */
:root {
    --bg-main: #F4F6F5;
    --text-main: #0f172a;
    --accent: #4A6354;
    --base-shade: 0, 0, 0;
    --surface: #ffffff;
    --border-soft: rgba(180, 196, 186, 0.4);
    --glass-border: var(--border-soft); /* legacy alias for precompiled Tailwind arbitrary-value classes */
    --font-main: 'Inter', 'Inter Fallback', sans-serif;
    --font-mono: 'Space Mono', monospace;
    --header-bg: #FFFFFF;
    --header-text: #0f172a;
    --header-size: 15px;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --shadow-card: 0 8px 32px -4px rgba(0, 0, 0, 0.08);
    --text-muted: #737373;
    /* Page frame: the header, every page's content and the footer share this width and side
       padding, so their edges line up with the logo on every page (index.html uses the same values). */
    --page-max: 1600px;
    --page-pad: 5vw;
}

/* Page frame. .wd-frame sets the width and side padding; .wd-page adds the content's top and
   bottom spacing. Reading text sets its own narrower measure inside the frame. */
.wd-frame { width: 100%; max-width: var(--page-max); margin-left: auto; margin-right: auto; padding-left: var(--page-pad); padding-right: var(--page-pad); }
.wd-page { padding-top: 24px; padding-bottom: 24px; }
@media (min-width: 1024px) { .wd-page { padding-top: 48px; padding-bottom: 48px; } }
/* Card grids add a column on wide screens instead of stretching each card (later with the sidebar
   rail, which takes 260px of the width). */
@media (min-width: 1536px) {
    html:not(.nav-style-sidebar) .wd-cols-3-wide { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    html:not(.nav-style-sidebar) .wd-cols-4-wide { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (min-width: 1800px) {
    html.nav-style-sidebar .wd-cols-3-wide { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    html.nav-style-sidebar .wd-cols-4-wide { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.page-header-row { display: flex; align-items: center; gap: 16px; }
.page-title-icon { width: 48px; height: 48px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: #fff; }
.page-title-icon svg { width: 24px; height: 24px; }
/* List pages: the title, the section's description, then a meta line (how many, last updated, RSS). */
.list-head { margin: 0 0 32px; padding-bottom: 26px; border-bottom: 1px solid var(--border-soft); }
@media (min-width: 1024px) { .list-head { margin-bottom: 40px; } }
.list-intro { margin: 14px 0 0; max-width: 62ch; font-size: 17px; line-height: 1.55; color: var(--text-main); opacity: 0.72; }
.list-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; margin: 14px 0 0; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 12px; color: var(--text-main); }
.list-meta > span { opacity: 0.62; }
.list-meta > span + span::before { content: '\00b7'; margin-right: 10px; }
.list-meta time, .wd-meta-time time { border-bottom: 1px dotted currentColor; cursor: help; }
.list-rss { display: inline-flex; align-items: center; gap: 5px; margin-left: 4px; padding: 2px 9px; border: 1px solid var(--border-soft); border-radius: 999px; font: 700 11px/1.5 var(--font-main); letter-spacing: 0.04em; color: var(--text-main); opacity: 0.8; text-decoration: none; transition: opacity 0.15s, border-color 0.15s; }
.list-rss:hover { opacity: 1; border-color: var(--accent); }
.list-rss svg { width: 11px; height: 11px; }
/* The count beside each category filter. */
.filter-count { margin-left: 8px; font-size: 0.86em; font-weight: 600; opacity: 0.6; font-variant-numeric: tabular-nums; }
.filter-btn-standard .filter-count { float: right; }

/* Reading pages (cms.enhanceProse): a "#" after each heading copies a link to it; code blocks get a
   Copy button (on a wrapper, so it stays put while the code scrolls sideways). */
.wd-anchor { margin-left: 0.35em; font-weight: 700; color: var(--accent) !important; text-decoration: none !important; opacity: 0; transition: opacity 0.15s; }
.prose .wd-anchor, .wd-anchor { border-bottom: 0 !important; }
h2:hover > .wd-anchor, h3:hover > .wd-anchor, .wd-anchor:focus-visible { opacity: 0.75; }
@media (hover: none) { .wd-anchor { opacity: 0.4; } }
.wd-code { position: relative; }
.wd-code > pre { padding-right: 76px !important; }
.wd-copy { position: absolute; top: 10px; right: 10px; padding: 3px 10px; border: 1px solid rgba(255, 255, 255, 0.22); border-radius: 6px; background: rgba(255, 255, 255, 0.1); color: #fff; font: 600 11.5px/1.5 var(--font-main); cursor: pointer; opacity: 0.8; transition: opacity 0.15s, background 0.15s; }
.wd-copy:hover, .wd-copy:focus-visible { opacity: 1; background: rgba(255, 255, 255, 0.18); }
/* "On this page": the article's headings, the one you're reading marked. In the side rail on wide
   screens; a box at the top of the article on narrow ones. */
.wd-toc { padding: 18px 20px; }
.wd-toc-title { margin: 0 0 10px; font-size: 11px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-main); opacity: 0.6; }
.wd-toc ol { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--border-soft); }
.wd-toc a { display: block; margin-left: -2px; padding: 5px 0 5px 14px; border-left: 2px solid transparent; font-size: 13.5px; line-height: 1.4; color: var(--text-main); opacity: 0.72; text-decoration: none; transition: opacity 0.15s, color 0.15s; }
.wd-toc a:hover { opacity: 1; }
.wd-toc .is-sub a { padding-left: 28px; font-size: 13px; }
.wd-toc a.is-current { opacity: 1; font-weight: 700; color: var(--accent); border-left-color: var(--accent); }
.wd-toc-box { margin: 0 0 32px; border: 1px solid var(--border-soft); border-radius: var(--radius-lg); background: rgba(var(--base-shade), 0.02); }
.wd-toc-box summary { padding: 14px 18px; font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-main); opacity: 0.75; cursor: pointer; }
.wd-toc-box .wd-toc { padding: 0 18px 16px; }
/* Older / newer at the end of an article. */
.wd-pn { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--border-soft); }
.wd-pn a { display: block; min-width: 0; padding: 16px 18px; border: 1px solid var(--border-soft); border-radius: var(--radius-lg); color: var(--text-main); text-decoration: none; transition: border-color 0.15s; }
.wd-pn a:hover { border-color: var(--accent); }
.wd-pn a.is-older { grid-column: 2; text-align: right; }
.wd-pn small { display: block; margin-bottom: 4px; font-size: 11px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0.55; }
.wd-pn b { display: block; font-size: 15px; line-height: 1.35; overflow-wrap: anywhere; }
@media (max-width: 560px) { .wd-pn { grid-template-columns: minmax(0, 1fr); } .wd-pn a.is-older { grid-column: auto; } }
* { box-sizing: border-box; }
html { background-color: var(--bg-main); }
body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
    line-height: 1.6;
    margin: 0;
}

/* Background patterns (Appearance > Background Pattern sets the html.bg-* class). */
.glass-bg { background-color: var(--bg-main); }
html.bg-grid body { background-image: linear-gradient(to right, var(--border-soft) 1px, transparent 1px), linear-gradient(to bottom, var(--border-soft) 1px, transparent 1px); background-size: 40px 40px; }
html.bg-dots body { background-image: radial-gradient(var(--border-soft) 1px, transparent 1px); background-size: 24px 24px; }
html.bg-lines body { background-image: repeating-linear-gradient(45deg, var(--border-soft) 0, var(--border-soft) 1px, transparent 1px, transparent 10px); }
html.bg-scanlines body { background-image: linear-gradient(rgba(0,0,0,0) 50%, rgba(0,0,0,0.06) 50%); background-size: 100% 4px; }
html.bg-glow body { background-image: radial-gradient(circle at 0% 0%, color-mix(in srgb, var(--accent), transparent 90%), transparent 45%), radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--accent), transparent 92%), transparent 40%), radial-gradient(circle at 50% 100%, color-mix(in srgb, var(--accent), transparent 94%), transparent 35%); background-attachment: fixed; }
html.bg-aurora body { background-image: linear-gradient(180deg, color-mix(in srgb, var(--accent), transparent 88%) 0%, transparent 35%), radial-gradient(ellipse 900px 400px at 20% 0%, color-mix(in srgb, var(--accent), transparent 82%), transparent 60%), radial-gradient(ellipse 900px 400px at 80% 0%, color-mix(in srgb, var(--accent), transparent 85%), transparent 60%); background-attachment: fixed; }
html.bg-beam body { background-image: linear-gradient(115deg, transparent 30%, color-mix(in srgb, var(--accent), transparent 90%) 50%, transparent 70%); background-attachment: fixed; }
html.bg-vignette body { background-image: radial-gradient(circle at 50% 30%, transparent 0%, rgba(var(--base-shade), 0.06) 100%); background-attachment: fixed; }
html.bg-grain body { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E"); }
html.bg-none body { background-image: none; }

/* Content card: a surface panel over the page background. */
.content-card {
    background-color: var(--bg-main);
    position: relative;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}
.content-card::before {
    content: ''; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
    background: var(--surface);
}
.content-card > * { position: relative; z-index: 1; }

/* Markdown text (.prose): Tailwind Typography colours it with fixed greys that ignore the theme
   (near-black headings on a dark theme). Map its colour variables to the theme's. Code blocks
   keep Typography's dark background, which reads on light and dark themes. */
.prose {
    --tw-prose-body: var(--text-main);
    --tw-prose-headings: var(--text-main);
    --tw-prose-lead: var(--text-muted);
    --tw-prose-links: var(--accent);
    --tw-prose-bold: var(--text-main);
    --tw-prose-counters: var(--text-muted);
    --tw-prose-bullets: var(--text-muted);
    --tw-prose-hr: var(--border-soft);
    --tw-prose-quotes: var(--text-main);
    --tw-prose-quote-borders: var(--accent);
    --tw-prose-captions: var(--text-muted);
    --tw-prose-kbd: var(--text-main);
    --tw-prose-kbd-shadows: rgba(var(--base-shade), 0.1);
    --tw-prose-code: var(--text-main);
    --tw-prose-th-borders: var(--border-soft);
    --tw-prose-td-borders: var(--border-soft);
}

.site-header { background: var(--header-bg); border-bottom: 1px solid var(--border-soft); z-index: 50; box-shadow: 0 2px 4px rgba(0,0,0,0.05); }

.gradient-text { background-clip: text; -webkit-background-clip: text; color: transparent; background-image: linear-gradient(135deg, var(--text-main) 40%, var(--accent)); }

/* Search palette (cms.initCommandPalette). */
#cmd-palette { transition: opacity 0.2s ease, visibility 0.2s; }
#cmd-content { transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1); }
.cmd-hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.cmd-hidden #cmd-content { transform: scale(0.95) translateY(10px); }
.cmd-visible { opacity: 1; visibility: visible; pointer-events: auto; }
.cmd-visible #cmd-content { transform: scale(1) translateY(0); }

/* Top bar. */
.top-bar { position: sticky; top: 0; width: 100%; height: 70px; background: var(--header-bg); border-bottom: 1px solid var(--border-soft); z-index: 50; }
.top-bar-inner { max-width: var(--page-max); width: 100%; margin: 0 auto; padding: 0 var(--page-pad); display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo-container { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav-logo-icon { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }
.nav-logo-text { font-size: 18px; font-weight: 800; color: var(--text-main); letter-spacing: -0.02em; margin: 0; }
.nav-right-group { display: flex; align-items: center; gap: 32px; margin-left: auto; }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: var(--header-size); font-weight: 600; }
.nav-link { color: var(--text-main); opacity: 0.65; text-decoration: none; transition: 0.2s; padding: 6px 0; position: relative; }
.nav-link:hover, .nav-link.active { opacity: 1; color: var(--accent); }
.nav-link::after { content: ''; position: absolute; left: 0; right: 0; bottom: -4px; height: 2px; background: var(--accent); border-radius: 2px; transform: scaleX(0); transition: transform 0.2s ease; }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.search-btn { padding: 8px 16px; border-radius: 999px; border: 1px solid var(--border-soft); background: var(--bg-main); color: var(--text-main); font-size: 14px; font-weight: 600; cursor: pointer; transition: 0.2s; display: flex; align-items: center; gap: 8px; }
.search-btn svg { width: 14px; height: 14px; opacity: 0.7; }
.search-btn:hover { border-color: var(--accent); }
.mobile-menu-btn { display: none; background: transparent; border: none; color: var(--text-main); cursor: pointer; padding: 6px; }
.mobile-menu-btn svg { width: 24px; height: 24px; }
.mobile-nav-link { font-size: 20px; font-weight: 700; color: var(--text-main); text-decoration: none; transition: 0.2s; }
.mobile-nav-link:hover, .mobile-nav-link.active { color: var(--accent); }

/* Sidebar rail (Navigation Style: sidebar). cms.applyNavStyle() moves #nav-links-desktop into it.
   style.css restyles the rail with aside.site-sidebar selectors, which outrank these. */
.site-sidebar { display: none; }
.sidebar-logo-row { padding: 0 20px 24px; }
.sidebar-search-btn { margin: 14px 20px 14px; justify-content: flex-start; }
@media (min-width: 1025px) {
    html.nav-style-sidebar body { margin-left: var(--rail-w, 260px); }
    html.nav-style-sidebar .top-bar { display: none; }
    html.nav-style-sidebar .site-sidebar {
        display: flex; flex-direction: column;
        position: fixed; top: 0; left: 0; bottom: 0; width: var(--rail-w, 260px);
        background: transparent; border-right: 1px solid var(--border-soft);
        padding: 24px 0; z-index: 40; overflow-y: auto;
    }
    html.nav-style-sidebar .site-sidebar #sidebar-nav-slot { flex: 0 0 auto; }
    html.nav-style-sidebar .site-sidebar #nav-links-desktop {
        display: flex; flex-direction: column; align-items: stretch; gap: 4px;
        padding: 0 12px; font-size: 14px;
    }
    html.nav-style-sidebar .site-sidebar .nav-link { padding: 9px 12px 9px 14px; opacity: 0.7; border-left: 3px solid transparent; transition: 0.15s; }
    html.nav-style-sidebar .site-sidebar .nav-link::after { display: none; }
    html.nav-style-sidebar .site-sidebar .nav-link:hover { opacity: 1; background: rgba(var(--base-shade), 0.04); border-left-color: color-mix(in srgb, var(--accent) 40%, transparent); }
    html.nav-style-sidebar .site-sidebar .nav-link.active { opacity: 1; font-weight: 700; color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); border-left-color: var(--accent); }
}

/* Mobile menu (cms.toggleMobileMenu). */
#mobile-menu-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 9000; background: var(--bg-main); display: flex; flex-direction: column; align-items: center; justify-content: center; transition: opacity 0.2s, visibility 0.2s; }
.mobile-hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.mobile-visible { opacity: 1; visibility: visible; pointer-events: auto; }
/* The hamburger covers everything below the sidebar rail's 1025px breakpoint (index.html uses the
   same 1024px cut), so no width is left without navigation. */
@media (max-width: 1024px) { .mobile-menu-btn { display: block !important; } .nav-links { display: none !important; } }

/* The site footer's styles are in style.css ("Site footer"), shared with index.html. */
@media (min-width: 1025px) {
    /* No top bar in sidebar mode: sticky side panels sit near the top of the window instead of
       leaving room for a 70px header that isn't there. */
    html.nav-style-sidebar .sticky.top-32,
    html.nav-style-sidebar .news-sidebar,
    html.nav-style-sidebar .music-sidebar,
    html.nav-style-sidebar .doc-aside,
    html.nav-style-sidebar .wd-sticky-meta { top: 24px; }
}