/* ==========================================================================
   Qvantum Case Studies — documentation site theme
   "Qvantum Editorial" look & feel: Apple-Keynote-minimalist, editorial,
   premium. Lead with black & white; color marks ONE thing per view.
   Plain CSS, no build step. Light/dark via CSS custom properties.
   Rebrand from the token block below.
   ========================================================================== */

/* ---------- Self-hosted type (no CDN, per project rule) ----------
   Host Grotesk is a variable font — one file serves weights 400–600. */
@font-face {
  font-family: "Host Grotesk";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/host-grotesk-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Host Grotesk";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/host-grotesk-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  /* -- Primary: lead with black & white ------------------------------- */
  --off-black: #232222;
  --off-white: #F4F4F4;
  --white: #FFFFFF;

  /* -- Secondary ------------------------------------------------------- */
  --brown: #91877A;      /* small uppercase eyebrow labels only */
  --beige: #E5E6DF;      /* alternate soft background */
  --hairline: #DEDDD7;   /* 1px borders, dividers */
  --ink-2: #4A4846;      /* secondary body text */
  --ink-3: #6E6A66;      /* tertiary / captions */

  /* -- Accents: use ONE at a time (data / active / emphasis) ---------- */
  --navy: #002656;
  --blue: #3164FD;
  --blue-light: #4AA1FF;
  --red: #C41230;
  --orange: #FF8D5A;     /* primary warm accent */
  --yellow: #F7E36E;

  /* -- Semantic aliases (drive the components) ------------------------ */
  --ink: var(--off-black);          /* primary text */
  --muted: var(--ink-2);            /* secondary text */
  --caption: var(--ink-3);          /* captions / meta */
  --paper: var(--off-white);        /* page background */
  --surface: var(--white);          /* cards / panels on off-white */
  --surface-2: #EAEAE4;             /* inline code / chips / skeleton */
  --border: var(--hairline);
  --border-strong: #CBCAC3;

  --accent: var(--orange);          /* the warm accent */
  --accent-strong: #E9713B;         /* darker step for hover/press */
  --accent-soft: #FBE7DB;           /* soft orange tint (active/marks) */
  --link: var(--navy);
  --link-hover: var(--blue);
  --danger: var(--red);
  --warn-bg: #FBF6DD;
  --warn-border: #E6D48A;

  --shadow: 0 1px 2px rgba(35, 34, 34, .04), 0 12px 30px rgba(35, 34, 34, .06);
  --shadow-lg: 0 30px 70px rgba(35, 34, 34, .16);

  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;

  --font: "Host Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Code", Consolas, "Liberation Mono", monospace;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.22, 1, 0.36, 1);
  --t-micro: 140ms;
  --t: 240ms;
  --t-lg: 480ms;

  --topbar-h: 64px;
  --sidebar-w: 280px;
  --toc-w: 220px;
  --content-max: 820px;
}

html[data-theme="dark"] {
  --ink: #F4F4F4;
  --muted: #C4C1BB;
  --caption: #9C9891;
  --paper: #1A1A19;         /* near off-black page */
  --surface: #232222;       /* off-black cards */
  --surface-2: #2E2D2B;
  --beige: #2A2825;
  --border: #38352F;
  --border-strong: #4A4846;
  --brown: #B4A896;
  --accent-soft: #3A2A20;
  --link: var(--blue-light);
  --link-hover: #7CBDFF;
  --warn-bg: #2C2812;
  --warn-border: #5C4F22;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 12px 30px rgba(0,0,0,.4);
  --shadow-lg: 0 30px 70px rgba(0,0,0,.55);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-weight: 400;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--link); text-decoration: none; transition: color var(--t-micro) var(--ease); }
a:hover { color: var(--link-hover); text-decoration: underline; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--off-black); color: #fff; padding: .6rem 1rem; border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 100;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 1rem;
  padding: 0 1.5rem;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: .7rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-logo { width: 30px; height: 30px; border-radius: 7px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: .95rem; font-weight: 600; letter-spacing: -.01em; }
.brand-text small { font-size: .72rem; color: var(--caption); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface); color: var(--ink);
  cursor: pointer; font-size: 1rem; flex: 0 0 auto;
  transition: border-color var(--t-micro) var(--ease), transform var(--t-micro) var(--ease);
}
.icon-btn:hover { border-color: var(--border-strong); }
.icon-btn:active { transform: scale(.96); }

.menu-toggle { display: none; }
.burger, .burger::before, .burger::after {
  display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px;
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease);
}
.burger { position: relative; }
.burger::before, .burger::after { content: ""; position: absolute; left: 0; }
.burger::before { top: -6px; }
.burger::after { top: 6px; }

/* Search */
.search { position: relative; margin-left: auto; width: min(420px, 42vw); }
.search input {
  width: 100%; height: 42px; padding: 0 1rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); color: var(--ink);
  font-family: var(--font); font-size: .9rem; outline: none;
  transition: border-color var(--t-micro) var(--ease), box-shadow var(--t-micro) var(--ease);
}
.search input::placeholder { color: var(--caption); }
.search input:focus { border-color: var(--navy); box-shadow: 0 0 0 3px color-mix(in srgb, var(--navy) 15%, transparent); }
.search-results {
  position: absolute; top: calc(100% + 8px); left: 0; right: 0; z-index: 120;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); max-height: 60vh; overflow-y: auto; padding: .4rem;
}
.search-results .sr-item {
  display: block; padding: .55rem .7rem; border-radius: var(--radius-sm); color: var(--ink);
}
.search-results .sr-item:hover, .search-results .sr-item.active { background: var(--surface-2); text-decoration: none; }
.search-results .sr-title { font-weight: 600; font-size: .9rem; }
.search-results .sr-crumb { font-size: .75rem; color: var(--caption); }
.search-results .sr-snippet { font-size: .8rem; color: var(--muted); margin-top: .15rem; }
.search-results .sr-empty { padding: .8rem; color: var(--muted); font-size: .88rem; }
mark { background: var(--yellow); color: var(--off-black); padding: 0 .12em; border-radius: 3px; }

/* ---------- Layout ---------- */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  align-items: start;
  max-width: 1440px; margin: 0 auto;
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  padding: 1.8rem 1rem 1rem 1.5rem;
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
}
.nav { flex: 1; }
.nav-group { margin-bottom: 1.7rem; }
.nav-group h4 {
  margin: 0 0 .55rem .6rem; font-size: .7rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--brown); font-weight: 600;
}
.nav-group ul { list-style: none; margin: 0; padding: 0; }
.nav-group a {
  display: block; padding: .44rem .65rem; border-radius: var(--radius-sm);
  color: var(--muted); font-size: .9rem; font-weight: 400; border-left: 2px solid transparent;
  transition: background var(--t-micro) var(--ease), color var(--t-micro) var(--ease);
}
.nav-group a:hover { background: var(--surface); color: var(--ink); text-decoration: none; }
.nav-group a.active {
  background: var(--surface); color: var(--ink); font-weight: 600;
  border-left-color: var(--accent);
}
.sidebar-footer { padding: 1rem .6rem 0; border-top: 1px solid var(--border); margin-top: .5rem; }
.version-pill {
  display: inline-block; font-size: .72rem; font-weight: 600; color: var(--muted);
  background: var(--surface); border: 1px solid var(--border); padding: .25rem .65rem; border-radius: 999px;
}

.sidebar-backdrop {
  position: fixed; inset: var(--topbar-h) 0 0 0; background: rgba(35,34,34,.4); z-index: 90;
}

/* ---------- Main content ---------- */
.main {
  min-width: 0;
  padding: 3rem clamp(1.25rem, 4vw, 4rem) 5rem;
  outline: none;
}
.doc { max-width: var(--content-max); margin: 0 auto; }
.loading { color: var(--muted); padding: 2rem 0; }

/* Headlines: sentence case, weight 400, big jumps in SIZE, tight tracking. */
.doc h1 {
  font-size: clamp(2.3rem, 1.5rem + 3.4vw, 3.3rem); font-weight: 400; line-height: 1.04;
  letter-spacing: -.025em; margin: 0 0 .5rem;
}
.doc .lead { font-size: clamp(1.15rem, 1.05rem + .5vw, 1.35rem); color: var(--muted); margin: 0 0 2.4rem; line-height: 1.5; }
.doc h2 {
  font-size: clamp(1.6rem, 1.2rem + 1.7vw, 2.1rem); font-weight: 400; line-height: 1.15;
  letter-spacing: -.02em; margin: 3.4rem 0 1rem; padding-top: .2rem;
  scroll-margin-top: calc(var(--topbar-h) + 1rem);
}
.doc h3 { font-size: 1.18rem; font-weight: 600; letter-spacing: -.01em; margin: 2.1rem 0 .6rem; scroll-margin-top: calc(var(--topbar-h) + 1rem); }
.doc h2 + h3 { margin-top: 1.1rem; }
.doc p { margin: .8rem 0; }
.doc ul, .doc ol { margin: .8rem 0; padding-left: 1.3rem; }
.doc li { margin: .4rem 0; }
.doc li > ul, .doc li > ol { margin: .3rem 0; }
.doc strong { font-weight: 600; }

.anchor {
  opacity: 0; margin-left: .4rem; font-weight: 400; color: var(--caption);
  text-decoration: none; font-size: .8em;
}
.doc h2:hover .anchor, .doc h3:hover .anchor { opacity: 1; }

/* Kicker / eyebrow — brown, uppercase, tracked, the ONLY letter-spaced text */
.kicker {
  display: inline-block; text-transform: uppercase; letter-spacing: .13em; font-size: .76rem;
  font-weight: 600; color: var(--brown); margin-bottom: .55rem;
}

/* Code */
code {
  font-family: var(--mono); font-size: .86em; background: var(--surface-2);
  padding: .15em .4em; border-radius: 5px; border: 1px solid var(--border);
}
pre {
  position: relative; background: var(--off-black); color: rgba(255,255,255,.9);
  border: 1px solid var(--off-black); border-radius: var(--radius); padding: 1.1rem 1.2rem;
  overflow-x: auto; margin: 1.3rem 0;
}
pre code { background: none; border: none; padding: 0; font-size: .85rem; line-height: 1.6; color: inherit; }
.copy-btn {
  position: absolute; top: .55rem; right: .55rem; font-size: .72rem; padding: .28rem .6rem;
  border: 1px solid rgba(255,255,255,.24); border-radius: 6px; background: rgba(255,255,255,.08);
  color: rgba(255,255,255,.85); cursor: pointer; opacity: 0;
  transition: opacity var(--t-micro) var(--ease), border-color var(--t-micro) var(--ease);
}
pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: #fff; border-color: rgba(255,255,255,.5); }
.copy-btn.copied { color: var(--yellow); border-color: var(--yellow); }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.4rem 0; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; padding: .7rem .9rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--beige); font-weight: 600; white-space: nowrap; }
tr:last-child td { border-bottom: none; }
td code { white-space: nowrap; }

/* ---------- Callouts (hairline boxes + eyebrow label — no left accent bar) ---------- */
.note, .tip, .warn {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem 1.15rem; margin: 1.4rem 0; background: var(--surface);
}
.tip  { background: var(--beige); }
.warn { background: var(--warn-bg); border-color: var(--warn-border); }
.note p:first-child, .tip p:first-child, .warn p:first-child { margin-top: 0; }
.note p:last-child, .tip p:last-child, .warn p:last-child { margin-bottom: 0; }
.callout-label {
  font-weight: 600; font-size: .72rem; text-transform: uppercase; letter-spacing: .1em;
  display: block; margin-bottom: .35rem; color: var(--brown);
}
.note .callout-label { color: var(--navy); }
html[data-theme="dark"] .note .callout-label { color: var(--blue-light); }
.warn .callout-label { color: var(--red); }

/* ---------- Steps — filled rounded-square number badges ---------- */
.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps > li {
  position: relative; padding-left: 3rem; margin: 1.2rem 0; counter-increment: step;
}
.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 2rem; height: 2rem; border-radius: var(--radius-sm); background: var(--accent); color: var(--off-black);
  display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: .95rem;
}

/* ---------- Cards grid (feature map) ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; margin: 1.6rem 0; }
.feature-card {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 1.2rem; background: var(--surface);
  display: block; color: var(--ink);
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease-in), box-shadow var(--t) var(--ease);
}
.feature-card:hover { border-color: var(--border-strong); transform: translateY(-3px); box-shadow: var(--shadow); text-decoration: none; }
.feature-card .fc-icon { font-size: 1.5rem; }
.feature-card h3 { margin: .55rem 0 .3rem; font-size: 1.02rem; font-weight: 600; }
.feature-card p { margin: 0; font-size: .87rem; color: var(--muted); }

/* Badges */
.badge {
  display: inline-block; font-size: .72rem; font-weight: 600; padding: .16rem .55rem; border-radius: 999px;
  background: var(--surface-2); color: var(--muted); border: 1px solid var(--border);
}
.badge.admin  { background: color-mix(in srgb, var(--navy) 12%, var(--white)); color: var(--navy); border-color: transparent; }
.badge.editor { background: var(--accent-soft); color: var(--accent-strong); border-color: transparent; }
.badge.dev    { background: var(--beige); color: var(--brown); border-color: transparent; }
html[data-theme="dark"] .badge.admin  { background: #16273f; color: var(--blue-light); }
html[data-theme="dark"] .badge.editor { background: #3a2a20; color: var(--orange); }

kbd {
  font-family: var(--mono); font-size: .8em; background: var(--surface-2); border: 1px solid var(--border-strong);
  border-bottom-width: 2px; border-radius: 5px; padding: .1em .45em;
}

/* Definition-style field lists */
.fielddef { margin: 1.4rem 0; }
.fielddef dt { font-weight: 600; margin-top: 1rem; }
.fielddef dt code { font-weight: 600; }
.fielddef dd { margin: .2rem 0 0; color: var(--muted); }

/* Page nav (prev/next) */
.page-nav {
  max-width: var(--content-max); margin: 3.5rem auto 0; display: flex; justify-content: space-between; gap: 1rem;
  border-top: 1px solid var(--border); padding-top: 1.6rem;
}
.page-nav a {
  flex: 1; border: 1px solid var(--border); border-radius: var(--radius); padding: .9rem 1.15rem;
  color: var(--ink); display: flex; flex-direction: column; background: var(--surface);
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease-in);
}
.page-nav a:hover { border-color: var(--border-strong); transform: translateY(-2px); text-decoration: none; }
.page-nav a.next { text-align: right; align-items: flex-end; }
.page-nav .pn-label { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--brown); }
.page-nav .pn-title { font-weight: 600; color: var(--ink); }

.doc-footer { max-width: var(--content-max); margin: 3rem auto 0; color: var(--caption); font-size: .82rem; }

/* ---------- On this page (TOC) ---------- */
.toc {
  position: sticky; top: var(--topbar-h); height: calc(100vh - var(--topbar-h));
  overflow-y: auto; padding: 3rem 1.25rem 2rem .5rem; font-size: .85rem;
}
.toc h5 { margin: 0 0 .7rem; font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--brown); font-weight: 600; }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc a { display: block; padding: .28rem .8rem; color: var(--muted); border-left: 2px solid transparent; margin-left: -1px; }
.toc a:hover { color: var(--ink); text-decoration: none; }
.toc a.active { color: var(--ink); border-left-color: var(--accent); font-weight: 600; }
.toc a.lvl-3 { padding-left: 1.5rem; font-size: .82rem; }

/* ---------- Responsive ---------- */
@media (max-width: 1200px) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 860px) {
  :root { --sidebar-w: 290px; }
  .menu-toggle { display: inline-flex; }
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; top: var(--topbar-h); left: 0; z-index: 95;
    width: var(--sidebar-w); background: var(--paper);
    transform: translateX(-105%); transition: transform var(--t) var(--ease); box-shadow: var(--shadow-lg);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  .brand-text small { display: none; }
  .search { width: auto; flex: 1; }
}
@media (max-width: 560px) {
  .brand-text { display: none; }
  .main { padding: 2rem 1.1rem 3.5rem; }
  .page-nav { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}

/* ==========================================================================
   VISUAL TOOLKIT — page heroes, figures, UI mockups, flow diagrams
   All self-contained (no external images) and theme-aware (light/dark).
   ========================================================================== */

/* ---------- Page hero (default: clean editorial, black & white) ---------- */
.page-hero {
  display: flex; gap: 1.2rem; align-items: flex-start;
  padding: 0 0 1.9rem; margin: 0 0 2.2rem;
  border-bottom: 1px solid var(--border); position: relative;
}
.page-hero .ph-icon {
  flex: 0 0 auto; width: 58px; height: 58px; font-size: 1.7rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.page-hero .ph-text { min-width: 0; }
.page-hero .kicker { margin-bottom: .3rem; }
.page-hero h1 { margin: .1rem 0 .5rem; }
.page-hero .lead { margin: 0; }
@media (max-width: 560px) { .page-hero { flex-direction: column; gap: .9rem; } }

/* ---------- Signature: "The Flow" gradient hero (use rarely) ---------- */
.page-hero.flow {
  border-bottom: none; border-radius: var(--radius-lg); overflow: hidden;
  padding: clamp(2rem, 5vw, 3.2rem); color: #fff;
  background: linear-gradient(120deg, #FF8D5A 0%, #FF8D5A 40%, #002656 100%);
  background-size: 300% 300%; animation: flow 22s ease-in-out infinite;
}
.page-hero.flow::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(120% 120% at 80% 0%, transparent 30%, rgba(6,17,42,.55) 100%);
}
.page-hero.flow > * { position: relative; z-index: 1; }
.page-hero.flow .kicker { color: rgba(255,255,255,.9); }
.page-hero.flow h1 { color: #fff; }
.page-hero.flow .lead { color: rgba(255,255,255,.85); }
.page-hero.flow .ph-icon {
  background: rgba(255,255,255,.14); border-color: rgba(255,255,255,.3);
  box-shadow: none; backdrop-filter: blur(4px);
}
@keyframes flow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* At-a-glance summary box */
.at-a-glance {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--beige); padding: 1.1rem 1.25rem; margin: 1.8rem 0;
}
.at-a-glance h4 { margin: 0 0 .7rem; font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--brown); font-weight: 600; }
.at-a-glance ul { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: .5rem .9rem; }
.at-a-glance li { margin: 0; font-size: .9rem; padding-left: 1.4rem; position: relative; }
.at-a-glance li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-weight: 600; }

/* Figures + captions + side-by-side split */
.figure { margin: 1.9rem 0; }
.figure-caption { font-size: .82rem; color: var(--caption); margin-top: .6rem; text-align: center; }
.figure img {
  max-width: 100%; border-radius: var(--radius); border: 1px solid var(--border); cursor: zoom-in; display: block; margin: 0 auto;
  transition: transform var(--t) var(--ease-in);
}
.figure img:hover { transform: scale(1.02); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 1.6rem; align-items: center; margin: 1.8rem 0; }
.split > .figure { margin: 0; }
@media (max-width: 720px) { .split { grid-template-columns: 1fr; } }

/* Stats row — big number leads (off-black), label muted */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 1rem; margin: 1.8rem 0; }
.stat { border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem; background: var(--surface); }
.stat b { display: block; font-size: 2.1rem; font-weight: 400; letter-spacing: -.03em; color: var(--ink); line-height: 1.05; }
.stat span { font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; color: var(--brown); }

/* Color swatches */
.swatches { display: flex; flex-wrap: wrap; gap: .55rem; margin: 1.4rem 0; }
.swatch { display: flex; align-items: center; gap: .5rem; font-size: .82rem; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .35rem .65rem; background: var(--surface); }
.swatch .chip { width: 1.1rem; height: 1.1rem; border-radius: 5px; border: 1px solid var(--border-strong); flex: 0 0 auto; }

/* ---------- UI mockups ---------- */
.mock {
  border: 1px solid var(--border-strong); border-radius: var(--radius); overflow: hidden;
  background: var(--surface); box-shadow: var(--shadow); font-size: .8rem; line-height: 1.4;
}
.mock-bar {
  display: flex; align-items: center; gap: .55rem; padding: .55rem .85rem;
  background: var(--beige); border-bottom: 1px solid var(--border);
  font-weight: 600; font-size: .76rem; color: var(--muted);
}
.mock-dots { display: flex; gap: .3rem; }
.mock-dots i { width: .6rem; height: .6rem; border-radius: 50%; background: var(--border-strong); display: block; }
.mock-addr { flex: 1; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: .15rem .7rem; font-weight: 400; color: var(--caption); font-family: var(--mono); font-size: .7rem; }
.mock-body { padding: .95rem; display: grid; gap: .6rem; }
.mock-editor { display: grid; grid-template-columns: 1fr 220px; gap: .85rem; }
.mock-canvas { display: grid; gap: .55rem; min-width: 0; }

.mock-block { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .55rem .65rem; background: var(--surface); display: flex; gap: .55rem; align-items: flex-start; }
.mock-block .mb-main { flex: 1; min-width: 0; }
.mb-label { font-size: .65rem; text-transform: uppercase; letter-spacing: .07em; color: var(--brown); display: block; margin-bottom: .25rem; }
.mock-line { height: .5rem; background: var(--surface-2); border-radius: 4px; margin: .3rem 0; }
.mock-line.w90 { width: 90%; } .mock-line.w80 { width: 80%; } .mock-line.w70 { width: 70%; } .mock-line.w60 { width: 60%; } .mock-line.w40 { width: 40%; }
.mock-block.locked { background: var(--accent-soft); border-color: transparent; }
.mock-block.quote { border-left: 3px solid var(--brown); font-style: italic; color: var(--muted); }

.mock-hero { height: 82px; border-radius: var(--radius-sm); background: linear-gradient(120deg, var(--orange), var(--navy)); display: flex; align-items: flex-end; padding: .5rem .6rem; color: #fff; font-weight: 600; font-size: .78rem; }
.mock-kpis { display: flex; gap: .5rem; }
.mock-kpi { flex: 1; background: var(--beige); border-radius: var(--radius-sm); padding: .5rem; text-align: center; }
.mock-kpi b { display: block; font-size: 1.15rem; font-weight: 400; color: var(--ink); }
.mock-kpi span { font-size: .62rem; text-transform: uppercase; letter-spacing: .05em; color: var(--brown); }
.mock-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: .4rem; }
.mock-gallery i { display: block; height: 44px; border-radius: 6px; background: linear-gradient(120deg, var(--beige), var(--surface-2)); }
.mock-divider { height: 0; border-top: 2px solid var(--border-strong); margin: .2rem 0; }

/* Metabox column */
.mock-metabox { border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--beige); overflow: hidden; align-self: start; }
.mock-metabox + .mock-metabox { margin-top: .6rem; }
.mock-metabox h5 { margin: 0; padding: .48rem .6rem; background: var(--surface-2); font-size: .7rem; font-weight: 600; border-bottom: 1px solid var(--border); }
.mm-body { padding: .6rem; display: grid; gap: .45rem; }
.mock-field label { color: var(--muted); display: block; margin-bottom: .15rem; font-size: .66rem; }
.mock-input, .mock-select { border: 1px solid var(--border-strong); border-radius: 5px; padding: .3rem .42rem; background: var(--surface); font-size: .68rem; min-height: 1.4rem; }
.mock-select { display: flex; justify-content: space-between; align-items: center; }
.mock-select::after { content: "▾"; color: var(--caption); margin-left: .4rem; }
.mock-chip { display: inline-block; background: var(--accent-soft); color: var(--accent-strong); border-radius: 999px; padding: .1rem .5rem; font-size: .66rem; font-weight: 600; margin: .1rem .15rem 0 0; }
.mock-btn { display: inline-block; background: var(--accent); color: var(--off-black); border-radius: 6px; padding: .32rem .75rem; font-size: .7rem; font-weight: 600; text-align: center; transition: background var(--t-micro) var(--ease), transform var(--t-micro) var(--ease); }
.mock-btn:active { transform: scale(.98); }
.mock-btn.ghost { background: var(--surface-2); color: var(--ink); border: 1px solid var(--border); }

/* Card grid mockup */
.mock-cardgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .55rem; }
.mock-card { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; background: var(--surface); }
.mock-card .mc-img { height: 58px; background: linear-gradient(120deg, var(--beige), var(--surface-2)); position: relative; }
.mock-card .mc-kpi { position: absolute; bottom: .3rem; left: .3rem; background: var(--surface); border-radius: 5px; padding: .08rem .35rem; font-size: .62rem; font-weight: 600; color: var(--ink); box-shadow: var(--shadow); }
.mock-card .mc-body { padding: .45rem .5rem; }
.mock-card .mc-title { font-weight: 600; font-size: .7rem; }
.mock-card .mc-meta { font-size: .6rem; color: var(--caption); }

/* Tabs mockup */
.mock-tabs { display: flex; gap: .25rem; padding: .5rem .6rem 0; background: var(--beige); border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.mock-tab { padding: .34rem .72rem; font-size: .72rem; border: 1px solid var(--border); border-bottom: none; border-radius: 6px 6px 0 0; background: var(--surface-2); color: var(--muted); }
.mock-tab.active { background: var(--surface); color: var(--ink); font-weight: 600; }

/* Filter row mockup */
.mock-filterbar { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; }
.mock-filterbar .mock-search { flex: 1; min-width: 120px; }

/* ---------- Annotation pins (filled rounded-square, matches step badges) ---------- */
.pin {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.35rem; height: 1.35rem; border-radius: 6px; background: var(--accent); color: var(--off-black);
  font-size: .72rem; font-weight: 600; flex: 0 0 auto;
}
.annotate-legend { list-style: none; padding: 0; margin: 1.1rem 0 0; display: grid; gap: .6rem; }
.annotate-legend li { display: flex; gap: .65rem; align-items: flex-start; font-size: .9rem; margin: 0; }

/* ---------- Flow diagrams — hairline boxes joined by → arrows ---------- */
.flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: .5rem; margin: 1.8rem 0; }
.flow-step {
  flex: 1 1 0; min-width: 110px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); padding: .8rem .65rem; text-align: center; font-size: .82rem; display: flex; flex-direction: column; gap: .15rem; justify-content: center;
}
.flow-step .fs-icon { font-size: 1.4rem; }
.flow-step b { display: block; font-weight: 600; }
.flow-step small { color: var(--caption); font-size: .72rem; }
.flow-step.accent { border-color: var(--accent); background: var(--accent-soft); }
.flow-arrow { display: flex; align-items: center; justify-content: center; color: var(--brown); font-size: 1.3rem; flex: 0 0 auto; padding: 0 .1rem; }
.flow-branch { display: grid; gap: .5rem; flex: 1 1 0; min-width: 140px; }
.outcome { display: inline-flex; align-items: center; gap: .35rem; padding: .26rem .62rem; border-radius: 999px; font-size: .76rem; font-weight: 600; }
.outcome.ok { background: var(--accent-soft); color: var(--accent-strong); }
.outcome.no { background: var(--surface-2); color: var(--muted); }
@media (max-width: 600px) {
  .flow { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); }
}

/* ---------- File map (dev page) ---------- */
.filemap { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 1.6rem 0; background: var(--surface); }
.fm-row { display: flex; gap: .8rem; padding: .55rem .85rem; border-bottom: 1px solid var(--border); align-items: baseline; }
.fm-row:last-child { border-bottom: none; }
.fm-row.dir { background: var(--beige); }
.fm-name { font-family: var(--mono); font-size: .8rem; color: var(--ink); font-weight: 600; white-space: nowrap; }
.fm-desc { font-size: .82rem; color: var(--muted); }

/* Shot placeholder (drop real screenshots here later) */
.shot-placeholder {
  border: 2px dashed var(--border-strong); border-radius: var(--radius); padding: 1.6rem;
  text-align: center; color: var(--muted); font-size: .85rem; background: var(--surface);
}
.shot-placeholder .sp-icon { font-size: 1.7rem; display: block; margin-bottom: .3rem; }

/* Narrow-screen mockup reflow */
@media (max-width: 600px) {
  .mock-editor { grid-template-columns: 1fr; }
  .mock-cardgrid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Lightbox ---------- */
.lightbox { position: fixed; inset: 0; background: rgba(6,17,42,.86); display: flex; align-items: center; justify-content: center; z-index: 300; padding: 2rem; cursor: zoom-out; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: var(--radius); box-shadow: var(--shadow-lg); }
.lightbox.hidden { display: none; }