/* ============================================================
   C++ Concurrente · Control Industrial
   Sistema de diseño fiel a la documentación de LlamaIndex
   (Starlight/Astro): Geist, fondo #0A0A0A, violeta #3E18F9
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500;600&display=swap");

:root {
  --brand: #3e18f9;          /* violeta de marca (ambos temas) */
  --accent: #3e18f9;         /* enlaces y elementos activos */
  --accent-strong: #2e12e0;
  --accent-soft: rgba(62, 24, 249, .06);
  --accent-border: rgba(62, 24, 249, .35);
  --accent-shadow: rgba(62, 24, 249, .10);
  --component-blue: #155dfc;
  --bg: #ffffff;
  --bg-soft: #ffffff;
  --bg-code: rgba(38, 38, 38, .04);
  --panel: #ffffff;
  --border: #e7e7e7;
  --border-strong: #bfc2c8;
  --text: #262626;
  --text-2: #404040;
  --text-3: #737373;
  --link: #3e18f9;
  --code-inline-bg: #bfc2c8;
  --code-inline: #262626;
  --ok: #10b981;
  --warn: #b45309;
  --err: #ff337a;
  --info: #3347ff;
  --tip: #9d1fcc;
  --caution: #b45309;
  --shadow: none;
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, .12);
  --radius: 12px;
  --radius-sm: 8px;
  --sidebar-w: 264px;
  --toc-w: 240px;
  --topbar-h: 56px;
  --font: "Geist", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "Geist Mono", ui-monospace, "Cascadia Code", "JetBrains Mono", Consolas, "Liberation Mono", monospace;
}

html[data-theme="dark"] {
  --accent: #92aeff;         /* púrpura claro de LlamaIndex en oscuro */
  --accent-strong: #c0d1ff;
  --accent-soft: rgba(146, 174, 255, .10);
  --accent-border: rgba(146, 174, 255, .4);
  --accent-shadow: rgba(146, 174, 255, .10);
  --bg: #0a0a0a;
  --bg-soft: #0a0a0a;
  --bg-code: rgba(245, 245, 245, .04);
  --panel: #0a0a0a;
  --border: rgba(255, 255, 255, .06);
  --border-strong: #35383f;
  --text: #f5f5f5;
  --text-2: #a3a3a3;
  --text-3: rgba(245, 245, 245, .66);
  --link: #92aeff;
  --code-inline-bg: #35383f;
  --code-inline: #f5f5f5;
  --warn: #ffbe33;
  --tip: #be33ff;
  --caution: #ffbe33;
  --shadow: none;
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, .55);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
::selection { background: color-mix(in srgb, var(--accent) 35%, transparent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

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

/* ---------- Barra superior (Starlight) ---------- */
#topbar {
  position: fixed; inset: 0 0 auto 0; height: var(--topbar-h);
  display: flex; align-items: center; gap: 14px;
  padding: 0 24px; z-index: 60;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand > span { font-size: 15.5px; font-weight: 600; letter-spacing: -.01em; }
.brand small { font-weight: 500; color: var(--text-3); font-size: 12.5px; margin-left: 4px; }

#searchbox { position: relative; flex: 1; max-width: 520px; margin-left: auto; }
#searchbox input {
  width: 100%; height: 38px; padding: 0 38px 0 38px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: transparent; color: var(--text);
  font: inherit; font-size: 14px; outline: none; transition: border-color .15s;
}
#searchbox input::placeholder { color: var(--text-3); }
#searchbox input:focus { border-color: var(--accent); }
#searchbox .icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-3); pointer-events: none; }
#searchbox kbd.hint {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  font-size: 11px; color: var(--text-3); border: 1px solid var(--border);
  border-radius: 5px; padding: 1px 6px; background: var(--bg); font-family: var(--mono);
}
#search-results {
  position: absolute; top: calc(100% + 8px); left: 0; right: 0;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  max-height: 64vh; overflow: auto; display: none; z-index: 80;
}
#search-results.open { display: block; }
#search-results .sr-item { display: block; padding: 10px 14px; border-bottom: 1px solid var(--border); color: var(--text); }
#search-results .sr-item:last-child { border-bottom: 0; }
#search-results .sr-item:hover { background: var(--accent-soft); text-decoration: none; }
#search-results .sr-title { font-weight: 600; font-size: 14px; }
#search-results .crumb { font-size: 11.5px; color: var(--text-3); text-transform: uppercase; letter-spacing: .05em; }
#search-results .sr-snip { font-size: 12.5px; color: var(--text-2); margin-top: 2px; }
#search-results .sr-empty { padding: 16px; color: var(--text-3); font-size: 14px; }
#search-results mark { background: var(--accent-soft); color: var(--accent-strong); border-radius: 3px; padding: 0 2px; }

.top-actions { display: flex; align-items: center; gap: 4px; }
.iconbtn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-sm); border: 1px solid transparent;
  background: transparent; color: var(--text-3); cursor: pointer; transition: .15s;
}
.iconbtn:hover { border-color: var(--border); color: var(--text); }
#menu-btn { display: none; }

/* ---------- Distribución ---------- */
#layout { display: block; }

#sidebar {
  position: fixed; top: var(--topbar-h); bottom: 0; left: 0;
  width: var(--sidebar-w); overflow-y: auto;
  padding: 22px 16px 48px;
  border-right: 1px solid var(--border);
  background: var(--bg);
  z-index: 50;
}
#sidebar .nav-section { margin-bottom: 20px; }
#sidebar .nav-label {
  font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--text-3); padding: 0 8px; margin: 0 0 8px;
}
#sidebar a.nav-link {
  display: block; padding: 5px 8px;
  color: var(--text-3); font-size: 13px; line-height: 1.5;
  border-left: 2px solid transparent;
}
#sidebar a.nav-link:hover { color: var(--text); text-decoration: none; }
#sidebar a.nav-link.active {
  color: var(--text); border-left-color: var(--accent);
  font-weight: 600;
}

#main {
  margin-left: var(--sidebar-w);
  padding: calc(var(--topbar-h) + 44px) 56px 72px;
  display: flex; gap: 48px; justify-content: center; min-height: 100vh;
}
#content { flex: 1; min-width: 0; max-width: 860px; }

#toc {
  position: sticky; top: calc(var(--topbar-h) + 44px);
  width: var(--toc-w); flex: none; align-self: flex-start;
  max-height: calc(100vh - var(--topbar-h) - 80px); overflow-y: auto;
  font-size: 13px;
}
#toc .toc-title {
  font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 10px; padding-left: 12px;
}
#toc a { display: block; padding: 4px 0 4px 12px; color: var(--text-3); border-left: 2px solid var(--border); }
#toc a.h3 { padding-left: 26px; font-size: 12.5px; }
#toc a:hover { color: var(--text); text-decoration: none; }
#toc a.active { color: var(--accent); border-left-color: var(--accent); font-weight: 600; }

/* ---------- Tipografía (escala Starlight de LlamaIndex) ---------- */
#content h1 { font-size: 32px; line-height: 1.2; margin: 0 0 12px; font-weight: 600; letter-spacing: -.03em; }
#content h2 {
  font-size: 24px; margin: 48px 0 16px; font-weight: 600; letter-spacing: -.03em;
}
#content h2:first-of-type { margin-top: 32px; }
#content h3 { font-size: 20px; margin: 32px 0 12px; font-weight: 600; letter-spacing: -.02em; }
#content h4 { font-size: 15.5px; margin: 24px 0 8px; font-weight: 600; }
#content p { margin: 0 0 16px; color: var(--text-2); }
#content ul, #content ol { margin: 0 0 16px; padding-left: 26px; color: var(--text-2); }
#content li { margin: 5px 0; }
#content li > ul, #content li > ol { margin: 5px 0; }
#content .lead { font-size: 17px; color: var(--text-2); line-height: 1.65; margin-bottom: 24px; }
#content .subtitle { color: var(--text-3); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }

/* Enlaces con el subrayado violeta característico */
#content a {
  color: var(--accent); font-weight: 500;
  text-decoration: underline; text-underline-offset: 3px;
  text-decoration-thickness: 1.5px; text-decoration-color: var(--accent);
}
#content a:hover { text-decoration-thickness: 2px; }
#content a:not([href^="#"]) { text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent); }
#content a:not([href^="#"]) { text-decoration-color: var(--accent); }

.anchor { opacity: 0; margin-left: 8px; font-weight: 400; color: var(--text-3); font-size: .85em; }
h2:hover .anchor, h3:hover .anchor { opacity: 1; }

kbd {
  font-family: var(--mono); font-size: .82em;
  border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 5px;
  padding: 1px 6px; background: var(--bg-soft); color: var(--text);
}

code:not(pre code) {
  font-family: var(--mono); font-size: .85em;
  background: var(--code-inline-bg); color: var(--code-inline);
  padding: 2px 6px; border-radius: 4px;
  word-break: break-word;
}

/* ---------- Bloques de código ---------- */
.codeblock {
  margin: 20px 0; border-radius: var(--radius);
  background: var(--bg-code); border: 1px solid var(--border-strong);
  overflow: hidden;
}
.codeblock .cb-head {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 16px; font-size: 12px; color: var(--text-3);
  border-bottom: 1px solid color-mix(in srgb, var(--border-strong) 50%, transparent);
  font-family: var(--mono);
}
.codeblock .cb-head .lang { margin-left: auto; text-transform: uppercase; letter-spacing: .06em; font-size: 10.5px; opacity: .8; }
.codeblock .copybtn {
  border: 1px solid var(--border-strong); background: transparent; color: var(--text-3);
  font-size: 11.5px; border-radius: 6px; padding: 2px 10px; cursor: pointer; font-family: var(--font);
}
.codeblock .copybtn:hover { color: var(--text); border-color: var(--text-3); }
.codeblock pre { margin: 0; padding: 16px 18px; overflow-x: auto; }
.codeblock pre code {
  font-family: var(--mono); font-size: 13px; line-height: 1.6; color: var(--text);
}
.codeblock .lineno { color: var(--text-3); user-select: none; display: inline-block; width: 2.4em; text-align: right; margin-right: 14px; opacity: .7; }

/* Colores de sintaxis (adaptados a cada tema) */
.tok-kw { color: #7c3aed; }
html[data-theme="dark"] .tok-kw { color: #c68ffa; }
.tok-type { color: #155dfc; }
html[data-theme="dark"] .tok-type { color: #92aeff; }
.tok-str { color: #0e9f6e; }
html[data-theme="dark"] .tok-str { color: #8ce99a; }
.tok-num { color: #d97706; }
html[data-theme="dark"] .tok-num { color: #ffbe6b; }
.tok-com { color: #6b7280; font-style: italic; }
html[data-theme="dark"] .tok-com { color: #737373; }
.tok-fn { color: #b45309; }
html[data-theme="dark"] .tok-fn { color: #ffb36b; }
.tok-pp { color: #be123c; }
html[data-theme="dark"] .tok-pp { color: #ff7a9b; }
.tok-op { color: #0891b2; }
html[data-theme="dark"] .tok-op { color: #7fddff; }

/* ---------- Callouts (estilo Starlight) ---------- */
.callout {
  margin: 20px 0; padding: 14px 18px;
  border-radius: var(--radius); border: 1px solid; border-left-width: 3px;
  font-size: 14.5px; color: var(--text);
}
.callout .co-title { font-weight: 700; font-size: 13.5px; display: flex; align-items: center; gap: 7px; margin-bottom: 4px; }
.callout p:last-child { margin-bottom: 0; }
.callout.note { background: rgba(51, 71, 255, .06); border-color: rgba(51, 71, 255, .28); }
.callout.note .co-title { color: var(--info); }
.callout.tip { background: rgba(190, 51, 255, .06); border-color: rgba(190, 51, 255, .28); }
.callout.tip .co-title { color: var(--tip); }
.callout.warning { background: rgba(255, 190, 51, .07); border-color: rgba(255, 190, 51, .3); }
.callout.warning .co-title { color: var(--caution); }
.callout.danger { background: rgba(255, 51, 122, .06); border-color: rgba(255, 51, 122, .28); }
.callout.danger .co-title { color: var(--err); }

/* ---------- Tablas (solo separadores horizontales, como Starlight) ---------- */
#content table {
  border-collapse: collapse; width: 100%; margin: 20px 0; font-size: 14.5px;
  display: block; overflow-x: auto;
}
#content th, #content td {
  border: 0; border-bottom: 1px solid var(--border);
  padding: 8px 16px; text-align: left; vertical-align: top;
}
#content th { font-weight: 600; color: var(--text); }
#content tbody tr:last-child td { border-bottom: 0; }

/* ---------- Detalles plegables ---------- */
details.doc-box {
  margin: 20px 0; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 6px 14px; background: var(--bg);
}
details.doc-box summary {
  cursor: pointer; font-weight: 600; color: var(--accent);
  padding: 8px 0; font-size: 14.5px;
}
details.doc-box[open] { padding-bottom: 12px; }

/* ---------- Tarjetas (link-card) ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; margin: 24px 0; }
.card {
  display: block; padding: 20px; border: 1px solid var(--border); border-radius: var(--radius);
  background: transparent; color: var(--text); transition: .15s;
}
.card:hover { border-color: var(--accent); box-shadow: 0 2px 8px var(--accent-shadow); text-decoration: none; }
.card .card-icon { font-size: 22px; margin-bottom: 10px; display: block; }
.card h3 { margin: 0 0 8px; font-size: 15.5px; }
.card p { margin: 0; font-size: 13.5px; color: var(--text-3); line-height: 1.55; }
.card .tag { display: inline-block; font-size: 11px; color: var(--accent); border: 1px solid var(--accent-border); border-radius: 20px; padding: 1px 10px; margin-top: 12px; font-weight: 500; }

/* ---------- Navegación inferior ---------- */
#pagenav { display: flex; gap: 16px; margin-top: 56px; border-top: 1px solid var(--border); padding-top: 24px; }
#pagenav a {
  flex: 1; border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px;
  color: var(--text); transition: .15s;
}
#pagenav a:hover { border-color: var(--accent); box-shadow: 0 2px 8px var(--accent-shadow); text-decoration: none; }
#pagenav .pn-label { font-size: 12px; color: var(--text-3); }
#pagenav .pn-title { font-weight: 600; font-size: 14.5px; }
#pagenav a.next { text-align: right; }

/* ---------- Página de inicio ---------- */
.hero { padding: 48px 0 20px; }
.hero h1 { font-size: 42px; line-height: 1.1; letter-spacing: -.03em; font-weight: 700; margin-bottom: 16px; }
.hero h1 .accent { color: var(--accent); }
.hero .lead { max-width: 660px; font-size: 17.5px; }
.hero-actions { display: flex; gap: 12px; margin: 26px 0 10px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 20px; border-radius: var(--radius-sm); font-weight: 600; font-size: 14.5px;
  border: 1px solid transparent; cursor: pointer; transition: .15s;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: #2e12e0; text-decoration: none; color: #fff; }
.btn-ghost { border-color: var(--border); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); text-decoration: none; }

/* ---------- Laboratorios ---------- */
.lab-shell { margin: 24px 0; }
.lab-shell .lab-note { font-size: 13.5px; color: var(--text-3); margin: 12px 0 0; }

.lab-toolbar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 14px; margin-bottom: 14px;
  border: 1px solid var(--border); border-radius: var(--radius);
}
.lab-toolbar .btn-run { background: var(--ok); color: #fff; border: 0; padding: 8px 16px; border-radius: var(--radius-sm); font-weight: 700; cursor: pointer; font-size: 14px; }
.lab-toolbar .btn-run.paused { background: var(--warn); }
.lab-toolbar button { font-family: var(--font); }
.lab-toolbar .btn-tool {
  border: 1px solid var(--border); background: transparent; color: var(--text);
  padding: 7px 14px; border-radius: var(--radius-sm); cursor: pointer; font-size: 13.5px; font-weight: 600;
}
.lab-toolbar .btn-tool:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.lab-toolbar .speed { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-3); margin-left: auto; }
.lab-toolbar input[type="range"] { accent-color: var(--brand); width: 130px; }
.lab-toolbar .tick-badge { font-family: var(--mono); font-size: 12.5px; color: var(--text-2); border: 1px solid var(--border); border-radius: 6px; padding: 4px 10px; }

.lab-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 16px; }
.lab-grid .full { grid-column: 1 / -1; }
.lab-panel {
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; min-width: 0;
}
.lab-panel .lp-head {
  padding: 9px 16px; font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--text-3); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
}
.lab-panel .lp-body { padding: 14px 16px; }
.lab-panel svg.plant { width: 100%; height: auto; display: block; }

.threadcode { border-top: 1px solid var(--border); }
.threadcode:first-child { border-top: 0; }
.threadcode .tc-head {
  display: flex; align-items: center; gap: 8px; padding: 7px 14px;
  font-family: var(--mono); font-size: 12.5px; font-weight: 600; color: var(--text-2);
  cursor: default;
}
.threadcode .tc-dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.threadcode .tc-state { margin-left: auto; font-size: 11px; font-family: var(--font); font-weight: 600; border-radius: 20px; padding: 2px 10px; }
.tc-state.run { background: rgba(16, 185, 129, .14); color: var(--ok); }
.tc-state.blocked { background: rgba(255, 51, 122, .12); color: var(--err); }
.tc-state.ready { background: rgba(180, 83, 9, .13); color: var(--warn); }
html[data-theme="dark"] .tc-state.ready { color: #ffbe33; }
.tc-state.done { background: rgba(115, 115, 115, .16); color: var(--text-3); }
.threadcode pre { margin: 0; padding: 8px 0; overflow-x: auto; background: var(--bg-code); border-radius: 0; border: 0; }
.threadcode pre .line { display: flex; padding: 0 14px; min-height: 21.5px; }
.threadcode pre .line .ln { color: var(--text-3); user-select: none; min-width: 2em; text-align: right; margin-right: 12px; font-size: 12px; opacity: .7; }
.threadcode pre .line .lc { white-space: pre; font-family: var(--mono); font-size: 12.8px; line-height: 21.5px; color: var(--text); }
.threadcode pre .line.hl { background: color-mix(in srgb, var(--accent) 10%, transparent); outline: 1px solid color-mix(in srgb, var(--accent) 25%, transparent); }
.threadcode pre .line.hl .ln { color: var(--accent); font-weight: 700; opacity: 1; }

.sync-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  border: 1px solid var(--border); border-radius: 10px; padding: 8px 14px; min-width: 120px;
  font-size: 13px;
}
.chip .chip-name { font-family: var(--mono); font-weight: 600; font-size: 12.5px; color: var(--accent); }
.chip .chip-val { font-family: var(--mono); font-size: 20px; font-weight: 600; line-height: 1.2; }
.chip .chip-sub { font-size: 11.5px; color: var(--text-3); }
.chip.waiters { border-color: color-mix(in srgb, var(--err) 45%, transparent); background: rgba(255, 51, 122, .05); }

.qviz { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.qslot {
  width: 34px; height: 34px; border-radius: 8px; border: 1.5px dashed var(--border-strong);
  display: inline-flex; align-items: center; justify-content: center; font-size: 15px;
  transition: .15s;
}
.qslot.filled { border-style: solid; border-color: var(--accent-border); background: var(--accent-soft); }

.eventlog {
  font-family: var(--mono); font-size: 12.3px; line-height: 1.75;
  max-height: 250px; overflow-y: auto; margin: 0; padding: 0; list-style: none;
}
.eventlog li { padding: 1px 10px; border-left: 3px solid var(--border); margin: 0 0 1px; white-space: pre-wrap; }
.eventlog li .ev-t { color: var(--text-3); }
.eventlog li.ev-block { background: rgba(255, 51, 122, .06); border-left-color: var(--err); }
.eventlog li.ev-wake { background: rgba(16, 185, 129, .07); border-left-color: var(--ok); }
.eventlog li.ev-item { background: var(--accent-soft); border-left-color: var(--accent); }
.eventlog li.ev-warn { background: rgba(255, 190, 51, .08); border-left-color: var(--warn); }
.eventlog li.ev-dead { background: rgba(255, 51, 122, .14); border-left-color: var(--err); font-weight: 700; }

.kpi-row { display: flex; gap: 10px; flex-wrap: wrap; }
.kpi { border: 1px solid var(--border); border-radius: 10px; padding: 8px 16px; }
.kpi .kpi-v { font-family: var(--mono); font-size: 20px; font-weight: 600; }
.kpi .kpi-k { font-size: 11.5px; color: var(--text-3); }

.line-map { margin-top: 6px; }
.line-map td:first-child { font-family: var(--mono); font-size: 12.5px; white-space: nowrap; }

/* ---------- Varios ---------- */
.legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12.5px; color: var(--text-2); margin-top: 8px; }
.legend .swatch { display: inline-block; width: 11px; height: 11px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }

footer#site-footer {
  margin-left: var(--sidebar-w); padding: 26px 56px; border-top: 1px solid var(--border);
  color: var(--text-3); font-size: 13px; display: flex; gap: 14px; flex-wrap: wrap;
}

.deadlock-banner {
  display: none; margin: 10px 0; padding: 10px 14px; border-radius: 10px;
  background: rgba(255, 51, 122, .1); border: 1px solid rgba(255, 51, 122, .5); color: var(--err); font-weight: 600; font-size: 14px;
}
.deadlock-banner.show { display: block; }

/* ---------- Responsive ---------- */
@media (max-width: 1280px) { #toc { display: none; } }
@media (max-width: 1020px) {
  #sidebar { transform: translateX(-100%); transition: transform .2s ease; box-shadow: var(--shadow-lg); }
  body.nav-open #sidebar { transform: none; }
  #main, footer#site-footer { margin-left: 0; }
  #menu-btn { display: inline-flex; }
  #sidebar-backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, .4); z-index: 45; display: none; }
  body.nav-open #sidebar-backdrop { display: block; }
  .lab-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  #main { padding: calc(var(--topbar-h) + 24px) 22px 48px; }
  #searchbox kbd.hint { display: none; }
  .brand small { display: none; }
  .hero h1 { font-size: 30px; }
}