/* =========================================================
   RunMQ Docs — main stylesheet
   Theming via CSS variables. Light + dark.
   ========================================================= */

:root {
  --font-display: 'Fraunces', 'Iowan Old Style', Georgia, serif;
  --font-body: 'Onest', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --max-content: 760px;
  --max-shell: 1320px;
  --sidebar-w: 264px;
  --toc-w: 220px;
  --topbar-h: 64px;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgb(15 17 21 / 0.04), 0 0 0 1px rgb(15 17 21 / 0.04);
  --shadow-md: 0 4px 18px -8px rgb(15 17 21 / 0.18), 0 0 0 1px rgb(15 17 21 / 0.05);
  --shadow-glow: 0 0 0 1px var(--accent), 0 6px 22px -6px color-mix(in oklab, var(--accent) 50%, transparent);

  --transition: 200ms cubic-bezier(.2, .8, .2, 1);
}

/* ───── Light theme ───── */
:root,
:root[data-theme='light'] {
  color-scheme: light;
  --bg: #FBFAF6;
  --bg-soft: #F6F3EB;
  --surface: #FFFFFF;
  --surface-2: #FAF7EF;
  --text: #131317;
  --text-2: #4F5260;
  --text-3: #7B7E8C;
  --border: #E7E3D7;
  --border-strong: #D7D2C2;
  --accent: #E14A1B;          /* signal orange */
  --accent-2: #FF6A3D;
  --accent-soft: #FCEEE5;
  --accent-text: #7A2208;
  --selection: #FFD9C9;
  --code-bg: #F4F1E7;
  --code-border: #E5E0D0;
  --grid: #ECE7DA;
}

/* ───── Dark theme ───── */
:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0C0D10;
  --bg-soft: #101218;
  --surface: #14161C;
  --surface-2: #181B22;
  --text: #F2EFE7;
  --text-2: #A8AAB3;
  --text-3: #6F7280;
  --border: #21242C;
  --border-strong: #2C2F38;
  --accent: #FF6A3D;
  --accent-2: #FF8A66;
  --accent-soft: #2A150C;
  --accent-text: #FFB89C;
  --selection: #4A1E10;
  --code-bg: #11141B;
  --code-border: #21242C;
  --grid: #1A1D24;
}

/* ───── Base ───── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html,
body {
  margin: 0;
  padding: 0;
  overflow-x: clip;
}

body {
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(900px 500px at 88% -10%, color-mix(in oklab, var(--accent) 8%, transparent), transparent 60%),
    linear-gradient(var(--bg), var(--bg));
  font-feature-settings: 'ss01', 'cv11';
  transition: background-color var(--transition), color var(--transition);
}

::selection {
  background: var(--selection);
  color: var(--text);
}

a {
  color: var(--text);
  text-decoration: none;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent);
}

button {
  font-family: inherit;
}

/* ───── Topbar ───── */
.topbar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 50;
  height: var(--topbar-h);
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
}

.topbar__inner {
  max-width: var(--max-shell);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
}

.brand__mark {
  display: inline-flex;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  color: var(--text);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  letter-spacing: -0.01em;
  line-height: 1;
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 7px;
  border-radius: 4px;
  color: var(--accent-text);
  background: var(--accent-soft);
}

.topbar__nav {
  display: flex;
  gap: 22px;
  margin-left: 8px;
}

.topbar__nav a {
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

.topbar__nav a:hover {
  color: var(--text);
}

.topbar__nav a.is-active {
  color: var(--text);
}

.topbar__nav a.is-active::after {
  content: '';
  position: absolute;
  bottom: -22px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
}

.topbar__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: all var(--transition);
}

.icon-btn:hover {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
}

.icon-btn--mobile {
  display: none;
}

.theme-icon { display: none; }
:root[data-theme='light'] .theme-icon--moon { display: block; }
:root[data-theme='dark']  .theme-icon--sun  { display: block; }

/* ───── Layout shell ───── */
.layout {
  max-width: var(--max-shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  gap: 0;
  padding: 0 24px;
}

/* ───── Sidebar ───── */
.sidebar {
  position: sticky;
  top: var(--topbar-h);
  align-self: start;
  height: calc(100vh - var(--topbar-h));
  padding: 28px 16px 20px 0;
  border-right: 1px solid var(--border);
  overflow-y: auto;
  scrollbar-width: thin;
}

.sidebar__group {
  margin-bottom: 22px;
}

.sidebar__heading {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 0 0 6px 12px;
  font-weight: 500;
}

.sidebar a {
  display: block;
  padding: 6px 12px;
  margin: 1px 0;
  font-size: 14px;
  color: var(--text-2);
  border-radius: 7px;
  font-weight: 450;
  border: 1px solid transparent;
  position: relative;
  transition: all var(--transition);
}

.sidebar a:hover {
  color: var(--text);
  background: var(--surface);
}

.sidebar a.is-active {
  color: var(--text);
  background: var(--accent-soft);
  border-color: color-mix(in oklab, var(--accent) 18%, transparent);
}

.sidebar a.is-active::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 7px;
  bottom: 7px;
  width: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.sidebar__footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  margin-top: 12px;
  border-top: 1px dashed var(--border);
  color: var(--text-3);
  font-size: 12.5px;
}

.kbd {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--surface);
  color: var(--text-2);
}

/* ───── Main ───── */
.main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--toc-w);
  gap: 48px;
  padding: 48px 0 96px 36px;
  outline: none;
}

.article {
  max-width: var(--max-content);
  min-width: 0;
}

.article__loading {
  color: var(--text-3);
  font-size: 14px;
  padding: 48px 0;
}

/* Headings */
.article h1,
.article h2,
.article h3,
.article h4 {
  font-family: var(--font-display);
  letter-spacing: -0.018em;
  line-height: 1.15;
  color: var(--text);
  font-weight: 500;
  scroll-margin-top: calc(var(--topbar-h) + 16px);
}

.article h1 {
  font-size: clamp(2rem, 1.4rem + 2vw, 2.85rem);
  margin: 0 0 14px;
  font-weight: 500;
  letter-spacing: -0.024em;
}

.article h1 em,
.article h1 i {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.article h2 {
  font-size: 1.55rem;
  margin: 56px 0 14px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.article h2:first-of-type {
  border-top: none;
  padding-top: 0;
}

.article h3 {
  font-size: 1.18rem;
  margin: 36px 0 10px;
  font-weight: 500;
}

.article h4 {
  font-family: var(--font-body);
  font-size: 0.95rem;
  margin: 26px 0 8px;
  font-weight: 600;
  letter-spacing: 0;
}

.article p,
.article ul,
.article ol {
  margin: 0 0 16px;
  color: var(--text);
}

.article p {
  font-size: 16px;
  line-height: 1.7;
}

.article ul,
.article ol {
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.7;
}

.article li { margin: 4px 0; }
.article li::marker { color: var(--text-3); }

.article a:not(.btn) {
  color: var(--accent);
  border-bottom: 1px solid color-mix(in oklab, var(--accent) 35%, transparent);
}
.article a:not(.btn):hover {
  border-bottom-color: var(--accent);
}

.article strong { font-weight: 600; color: var(--text); }
.article em { font-style: italic; }

.article hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

.article blockquote {
  margin: 18px 0;
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--accent);
  color: var(--text-2);
  font-style: italic;
}

/* Eyebrow + lead */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.eyebrow::before {
  content: '';
  display: block;
  width: 18px;
  height: 1px;
  background: var(--accent);
}

.lead {
  font-size: 18px;
  line-height: 1.55;
  color: var(--text-2);
  margin: 0 0 28px;
  max-width: 60ch;
  font-weight: 400;
}

/* ───── TOC ───── */
.toc {
  position: sticky;
  top: calc(var(--topbar-h) + 32px);
  align-self: start;
  font-size: 13px;
  border-left: 1px solid var(--border);
  padding-left: 18px;
}

.toc__title {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 0 0 10px;
  font-weight: 500;
}

.toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc__list li {
  margin: 4px 0;
}

.toc__list li.indent {
  padding-left: 14px;
}

.toc__list a {
  color: var(--text-3);
  display: block;
  padding: 2px 0;
  line-height: 1.5;
  transition: color var(--transition);
}

.toc__list a:hover { color: var(--text); }
.toc__list a.is-active { color: var(--accent); }

/* ───── Footer ───── */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 56px 24px 64px;
  margin-top: 80px;
}

.site-footer__inner {
  max-width: var(--max-shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
}

.site-footer__brand {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 0 0 10px;
  font-weight: 500;
}

.site-footer__col a {
  display: block;
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 4px;
}

.site-footer__col a:hover { color: var(--accent); }

.site-footer__line {
  font-size: 13.5px;
  color: var(--text-3);
  line-height: 1.55;
  margin: 0;
}

/* ───── Responsive ───── */
@media (max-width: 1100px) {
  :root { --toc-w: 0px; }
  .main { grid-template-columns: minmax(0, 1fr); padding-right: 0; }
  .toc { display: none; }
}

@media (max-width: 880px) {
  .topbar__nav { display: none; }
  .icon-btn--mobile { display: inline-flex; }

  .layout {
    grid-template-columns: 1fr;
    padding: 0 18px;
  }

  .sidebar {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    height: calc(100vh - var(--topbar-h));
    width: 100%;
    background: var(--bg);
    border-right: none;
    border-top: 1px solid var(--border);
    padding: 18px;
    transform: translateX(-100%);
    transition: transform var(--transition);
  }

  .sidebar.is-open {
    transform: translateX(0);
  }

  .main { padding: 28px 0 64px; }

  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
  }
}