/* ================================================
   TechDocs — Design System
   A technical editorial documentation site.
   No purple. Warm palette. Modern + distinctive.
   ================================================ */

/* --- Variables --------------------------------- */
:root {
  --bg-body: #f7f6f3;
  --bg-surface: #ffffff;
  --bg-sidebar: #181b22;
  --bg-sidebar-hover: #22262f;
  --bg-sidebar-active: #282c36;
  --bg-header: rgba(247,246,243,0.92);
  --bg-code: #f2f0eb;
  --bg-modal-overlay: rgba(24,27,34,0.55);

  --text-primary: #2a2c31;
  --text-secondary: #585c64;
  --text-tertiary: #686d75;
  --text-inverse: #e8e9ec;
  --text-sidebar: #8e929b;
  --text-sidebar-active: #ffffff;

  --border: #e3e0d9;
  --border-light: #edeae4;
  --border-sidebar: rgba(255,255,255,0.07);

  --accent: #c0583a;
  --accent-hover: #a84a2f;
  --accent-subtle: #fdf0ec;

  --level-general: #278a7e;
  --level-general-bg: #edf7f5;
  --level-architect: #c0583a;
  --level-architect-bg: #fdf0ec;
  --level-engineer: #3674c9;
  --level-engineer-bg: #ebf1fb;
  --level-developer: #c99029;
  --level-developer-bg: #faf3e4;
  --level-reference: #6b8f71;
  --level-reference-bg: #edf5ee;

  --sidebar-w: 272px;
  --header-h: 52px;
  --content-max-w: 780px;
  --toc-w: 200px;

  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --ease: cubic-bezier(0.4,0,0.2,1);
  --ease-out: cubic-bezier(0,0,0.2,1);
}

/* --- Reset ------------------------------------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-body);color:var(--text-primary);background:var(--bg-body);line-height:1.65;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}
img,svg{display:block;max-width:100%}
a{color:var(--accent);text-decoration:none;transition:color 150ms var(--ease)}
a:hover{color:var(--accent-hover)}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
kbd{font-family:var(--font-body);font-size:0.7rem;font-weight:600;padding:2px 6px;border-radius:var(--radius-sm);background:var(--bg-body);border:1px solid var(--border);color:var(--text-tertiary);line-height:1}

/* --- Screen Reader Only ------------------------- */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* --- Skip Link --------------------------------- */
.skip-link{
  position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;
  z-index:10000;padding:12px 24px;background:var(--accent);color:#fff;
  font-weight:600;font-size:0.9rem;text-decoration:none;border-radius:0 0 var(--radius-md) 0;
}
.skip-link:focus{
  position:fixed;left:0;top:3px;width:auto;height:auto;overflow:visible;
}

/* --- Focus Styles ------------------------------ */
:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}
button:focus-visible,a:focus-visible,.filter-checkbox:focus-within{
  outline:2px solid var(--accent);
  outline-offset:2px;
}
.sidebar a:focus-visible,.sidebar button:focus-visible{
  outline-color:rgba(255,255,255,0.7);
}

/* --- Accent Bar -------------------------------- */
.accent-bar{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:9999;
  background:linear-gradient(90deg,var(--level-general) 0%,var(--level-architect) 33%,var(--level-engineer) 66%,var(--level-developer) 100%);
}

/* --- Layout Shell ------------------------------ */
.app-layout{
  display:flex;min-height:100vh;padding-top:3px;
}

/* --- Sidebar ----------------------------------- */
.sidebar{
  position:fixed;top:3px;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--bg-sidebar);color:var(--text-sidebar);
  display:flex;flex-direction:column;z-index:100;
  transition:transform 300ms var(--ease-out);
  overflow:hidden;
}
.sidebar-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 20px 16px;flex-shrink:0;
}
.logo{
  font-family:var(--font-display);font-size:1.4rem;
  color:var(--text-inverse);text-decoration:none;letter-spacing:-0.01em;
}
.logo span{color:#d4714b}
.sidebar-close{
  display:none;width:28px;height:28px;
  align-items:center;justify-content:center;
  border-radius:var(--radius-sm);color:var(--text-sidebar);
  transition:background 150ms var(--ease);
}
.sidebar-close:hover{background:var(--bg-sidebar-hover)}
.sidebar-close svg{width:16px;height:16px}

.sidebar-search{padding:0 12px 12px;flex-shrink:0}
.search-trigger{
  display:flex;align-items:center;gap:8px;width:100%;
  padding:8px 12px;border-radius:var(--radius-md);
  background:var(--bg-sidebar-hover);color:var(--text-sidebar);
  font-size:0.85rem;transition:background 150ms var(--ease);
  border:1px solid var(--border-sidebar);
}
.search-trigger:hover{background:var(--bg-sidebar-active)}
.search-trigger svg{width:15px;height:15px;flex-shrink:0;opacity:0.6}
.search-trigger span{flex:1;text-align:left}
.search-trigger kbd{
  background:var(--bg-sidebar-active);border-color:var(--border-sidebar);
  color:var(--text-sidebar);font-size:0.65rem;
}

/* Sidebar navigation */
.sidebar-nav{flex:1;min-height:0;overflow-y:auto;padding:4px 0;scrollbar-width:auto;scrollbar-color:rgba(255,255,255,0.3) rgba(255,255,255,0.08)}
.sidebar-nav::-webkit-scrollbar{width:8px}
.sidebar-nav::-webkit-scrollbar-track{background:rgba(255,255,255,0.08);border-radius:4px}
.sidebar-nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.3);border-radius:4px}
.sidebar-nav::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,0.45)}

.nav-home{
  display:flex;align-items:center;gap:8px;
  padding:8px 20px;font-size:0.85rem;font-weight:500;
  color:var(--text-sidebar);transition:all 150ms var(--ease);
}
.nav-home:hover,.nav-home.active{color:var(--text-sidebar-active);background:var(--bg-sidebar-hover)}
.nav-home svg{width:16px;height:16px;opacity:0.5}

.nav-section-label{
  padding:16px 20px 6px;font-size:0.65rem;font-weight:600;
  text-transform:uppercase;letter-spacing:0.08em;color:var(--text-sidebar);
}
.nav-category{margin-bottom:2px}
.nav-category-toggle{
  display:flex;align-items:center;gap:6px;width:100%;
  padding:7px 20px;font-size:0.84rem;font-weight:500;
  color:var(--text-sidebar);transition:all 150ms var(--ease);
}
.nav-category-toggle:hover{color:var(--text-sidebar-active);background:var(--bg-sidebar-hover)}
.nav-category-toggle svg{
  width:12px;height:12px;opacity:0.4;flex-shrink:0;
  transition:transform 200ms var(--ease);
}
.nav-category.open > .nav-category-toggle svg{transform:rotate(90deg)}
.nav-category.open > .nav-category-toggle{color:var(--text-inverse)}

.nav-subcategory{display:none;margin-left:0}
.nav-category.open > .nav-subcategory{display:block}

.nav-sub-label{
  padding:7px 20px 7px 34px;font-size:0.8rem;font-weight:500;
  color:var(--text-sidebar);display:flex;align-items:center;gap:6px;
}
.nav-item a{
  display:flex;align-items:center;gap:6px;
  padding:5px 20px 5px 46px;font-size:0.8rem;
  color:var(--text-sidebar);transition:all 150ms var(--ease);
  border-left:2px solid transparent;text-decoration:none;
}
.nav-item a:hover{color:var(--text-sidebar-active);background:var(--bg-sidebar-hover)}
.nav-item a.active{
  color:var(--text-sidebar-active);background:var(--bg-sidebar-active);
  border-left-color:var(--accent);
}

/* Level dots in nav */
.nav-level-dot{
  width:6px;height:6px;border-radius:50%;flex-shrink:0;opacity:0.7;
}
.nav-level-dot.general{background:var(--level-general)}
.nav-level-dot.architect{background:var(--level-architect)}
.nav-level-dot.engineer{background:var(--level-engineer)}
.nav-level-dot.developer{background:var(--level-developer)}
.nav-level-dot.reference{background:var(--level-reference)}

/* Sidebar filters */
.sidebar-filters{
  padding:12px 20px 16px;border-top:1px solid var(--border-sidebar);flex-shrink:0;
}
.sidebar-filters-label{
  font-size:0.65rem;font-weight:600;text-transform:uppercase;
  letter-spacing:0.08em;color:var(--text-sidebar);margin-bottom:8px;
}
.filter-checkbox{
  display:flex;align-items:center;gap:8px;padding:4px 0;cursor:pointer;
  font-size:0.8rem;color:var(--text-sidebar);transition:color 150ms var(--ease);
}
.filter-checkbox:hover{color:var(--text-sidebar-active)}
.filter-checkbox input{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.filter-check{
  width:16px;height:16px;border-radius:3px;border:1.5px solid var(--text-tertiary);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
  transition:all 150ms var(--ease);
}
.filter-checkbox input:checked + .filter-check{
  border-color:transparent;
}
.filter-checkbox input:checked + .filter-check svg{opacity:1}
.filter-check svg{width:10px;height:10px;opacity:0;color:#fff}
.filter-checkbox.general input:checked + .filter-check{background:var(--level-general)}
.filter-checkbox.architect input:checked + .filter-check{background:var(--level-architect)}
.filter-checkbox.engineer input:checked + .filter-check{background:var(--level-engineer)}
.filter-checkbox.developer input:checked + .filter-check{background:var(--level-developer)}

/* --- Main Wrapper ------------------------------ */
.main-wrapper{
  flex:1;margin-left:var(--sidebar-w);display:flex;flex-direction:column;min-height:100vh;
}

/* --- Header ------------------------------------ */
.main-header{
  position:sticky;top:3px;z-index:50;
  display:flex;align-items:center;gap:12px;
  height:var(--header-h);padding:0 28px;
  background:var(--bg-header);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border-light);
}
.menu-toggle{
  display:none;width:32px;height:32px;
  align-items:center;justify-content:center;
  border-radius:var(--radius-sm);flex-shrink:0;
  transition:background 150ms var(--ease);
}
.menu-toggle:hover{background:var(--border-light)}
.menu-toggle svg{width:18px;height:18px}

/* Breadcrumbs */
.breadcrumbs{display:flex;align-items:center;gap:6px;flex:1;min-width:0}
.breadcrumbs a,.breadcrumbs span{
  font-size:0.82rem;color:var(--text-secondary);white-space:nowrap;
  transition:color 150ms var(--ease);
}
.breadcrumbs a:hover{color:var(--accent)}
.breadcrumbs .bc-sep{
  font-size:0.7rem;color:var(--text-tertiary);flex-shrink:0;
  opacity:0.5;
}
.breadcrumbs .bc-current{color:var(--text-primary);font-weight:500}

/* Header-level badges */
.header-levels{display:flex;gap:5px;flex-shrink:0}

/* --- Content Area ------------------------------ */
.content-wrapper{
  display:flex;flex:1;padding:0 28px;gap:32px;
}
.content{
  flex:1;max-width:var(--content-max-w);padding:32px 0 64px;
}

/* --- Table of Contents (right sidebar) --------- */
.toc{
  width:var(--toc-w);flex-shrink:0;padding-top:32px;
  position:sticky;top:calc(var(--header-h) + 3px + 16px);
  align-self:flex-start;max-height:calc(100vh - var(--header-h) - 3px - 48px);
  overflow-y:auto;
}
.toc-label{
  font-size:0.7rem;font-weight:600;text-transform:uppercase;
  letter-spacing:0.08em;color:var(--text-tertiary);margin-bottom:12px;
}
.toc-list{border-left:1px solid var(--border)}
.toc-list a{
  display:block;padding:4px 0 4px 14px;font-size:0.78rem;
  color:var(--text-secondary);border-left:2px solid transparent;
  margin-left:-1px;transition:all 150ms var(--ease);text-decoration:none;
}
.toc-list a:hover{color:var(--text-primary)}
.toc-list a.active{color:var(--accent);border-left-color:var(--accent)}
.toc-list a.toc-h3{padding-left:28px;font-size:0.74rem}

/* --- Level Badges ------------------------------ */
.level-badge{
  display:inline-flex;align-items:center;gap:4px;
  padding:2px 10px;border-radius:20px;
  font-size:0.72rem;font-weight:600;letter-spacing:0.02em;
  text-transform:capitalize;
}
.level-badge.general{background:var(--level-general-bg);color:var(--level-general)}
.level-badge.architect{background:var(--level-architect-bg);color:var(--level-architect)}
.level-badge.engineer{background:var(--level-engineer-bg);color:var(--level-engineer)}
.level-badge.developer{background:var(--level-developer-bg);color:var(--level-developer)}
.level-badge.reference{background:var(--level-reference-bg);color:var(--level-reference)}

/* --- Document Content Typography --------------- */
.content h1{
  font-family:var(--font-display);font-size:2.2rem;font-weight:400;
  line-height:1.2;margin-bottom:8px;color:var(--text-primary);
  letter-spacing:-0.02em;
}
.content h2{
  font-family:var(--font-display);font-size:1.55rem;font-weight:400;
  line-height:1.3;margin-top:48px;margin-bottom:16px;
  padding-bottom:8px;border-bottom:1px solid var(--border-light);
  letter-spacing:-0.01em;
}
.content h3{
  font-size:1.15rem;font-weight:600;line-height:1.4;
  margin-top:32px;margin-bottom:12px;
}
.content h4{
  font-size:0.95rem;font-weight:600;line-height:1.4;
  margin-top:24px;margin-bottom:8px;text-transform:uppercase;
  letter-spacing:0.04em;color:var(--text-secondary);
}
.content p{margin-bottom:16px}
.content p + p{margin-top:0}
.content ul,.content ol{margin-bottom:16px;padding-left:24px}
.content ul{list-style:disc}
.content ol{list-style:decimal}
.content li{margin-bottom:6px}
.content li::marker{color:var(--text-tertiary)}

.content blockquote{
  margin:24px 0;padding:16px 20px;
  border-left:3px solid var(--accent);background:var(--accent-subtle);
  border-radius:0 var(--radius-md) var(--radius-md) 0;
  font-size:0.95rem;color:var(--text-secondary);
}
.content blockquote p:last-child{margin-bottom:0}

.content code{
  font-family:var(--font-mono);font-size:0.85em;
  padding:2px 6px;background:var(--bg-code);
  border-radius:var(--radius-sm);color:var(--accent);
}
.content pre{
  margin:24px 0;padding:20px;border-radius:var(--radius-md);
  background:#1e2128;color:#d4d5d9;overflow-x:auto;
  font-size:0.85rem;line-height:1.7;
  border:1px solid rgba(255,255,255,0.06);
  position:relative;
}
.content pre code{
  background:none;padding:0;color:inherit;font-size:inherit;
  border-radius:0;
}
.copy-btn{
  position:absolute;top:8px;right:8px;
  background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);
  color:#9ca0a8;border-radius:4px;padding:4px 10px;
  font-family:var(--font-body);font-size:0.72rem;font-weight:500;
  cursor:pointer;opacity:0;transition:opacity 0.15s,background 0.15s,color 0.15s;
  line-height:1.4;letter-spacing:0.02em;
}
.content pre:hover .copy-btn{opacity:1;}
.copy-btn:hover{background:rgba(255,255,255,0.15);color:#e8e9ec;}
.copy-btn.copied{background:var(--level-general);color:#fff;border-color:var(--level-general);opacity:1;}

.content table{
  width:100%;margin:24px 0;border-collapse:collapse;font-size:0.9rem;
}
.content th{
  text-align:left;padding:10px 14px;font-weight:600;font-size:0.8rem;
  text-transform:uppercase;letter-spacing:0.04em;color:var(--text-secondary);
  border-bottom:2px solid var(--border);background:var(--bg-body);
}
.content td{
  padding:10px 14px;border-bottom:1px solid var(--border-light);
}
.content tr:last-child td{border-bottom:none}

.content a{
  color:var(--accent);text-decoration:underline;
  text-underline-offset:2px;text-decoration-thickness:1px;
}
.content a:hover{text-decoration-thickness:2px}

.content hr{
  border:none;height:1px;background:var(--border);margin:40px 0;
}

/* Doc meta line */
.doc-meta{
  display:flex;align-items:center;gap:12px;
  margin-bottom:28px;flex-wrap:wrap;
}
.doc-meta-date{font-size:0.82rem;color:var(--text-tertiary)}
.doc-meta-levels{display:flex;gap:6px}

/* Level tabs — switch between depth levels of the same topic */
.level-tabs{
  display:flex;gap:4px;margin-bottom:28px;padding:4px;
  background:var(--bg-body);border-radius:var(--radius-md);
  border:1px solid var(--border-light);width:fit-content;
}
.level-tab{
  padding:6px 16px;border-radius:var(--radius-sm);
  font-size:0.8rem;font-weight:600;text-decoration:none;
  color:var(--text-secondary);transition:all 150ms var(--ease);
}
.level-tab:hover{background:var(--bg-surface);color:var(--text-primary)}
.level-tab.active{background:var(--bg-surface);box-shadow:var(--shadow-xs)}
.level-tab.active.overview{color:var(--level-general)}
.level-tab.active.architect{color:var(--level-architect)}
.level-tab.active.engineer{color:var(--level-engineer)}
.level-tab.active.developer{color:var(--level-developer)}

/* --- Hero / Landing Page ----------------------- */
.hero{
  margin:-32px -28px 40px;padding:40px 28px 32px;
  background:var(--bg-sidebar);color:var(--text-inverse);
  position:relative;overflow:hidden;
}
.hero::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(39,138,126,0.08) 0%,rgba(192,88,58,0.06) 50%,rgba(201,144,41,0.08) 100%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1;max-width:640px}
.hero-brand{
  font-family:var(--font-display);font-size:2.8rem;font-weight:400;
  color:var(--accent);letter-spacing:-0.03em;line-height:1;margin-bottom:10px;
}
.hero-brand span{color:#fff;font-weight:400}
.hero-tagline{
  font-size:1rem;color:var(--text-sidebar);margin-bottom:16px;
  font-family:var(--font-mono);letter-spacing:-0.01em;
}
.hero-scope{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.hero-chip{
  font-size:0.72rem;padding:3px 10px;border-radius:20px;
  background:rgba(255,255,255,0.07);border:1px solid rgba(255,255,255,0.1);
  color:var(--text-sidebar);letter-spacing:0.02em;text-transform:uppercase;
  font-weight:500;
}
.hero-stats{
  font-size:0.8rem;color:var(--text-sidebar);margin-bottom:18px;
  font-family:var(--font-mono);opacity:0.7;
}
.hero-search{
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;border-radius:var(--radius-md);
  background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.1);
  cursor:pointer;transition:all 200ms var(--ease);max-width:460px;
}
.hero-search:hover{background:rgba(255,255,255,0.12);border-color:rgba(255,255,255,0.18)}
.hero-search svg{width:18px;height:18px;color:var(--text-sidebar);flex-shrink:0}
.hero-search span{font-size:0.9rem;color:var(--text-sidebar);flex:1}
.hero-search kbd{
  background:rgba(255,255,255,0.08);border-color:rgba(255,255,255,0.1);
  color:var(--text-sidebar);
}

/* Level Cards */
.level-cards{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  margin-bottom:48px;
}
.level-card{
  padding:20px;border-radius:var(--radius-lg);
  background:var(--bg-surface);border:1px solid var(--border);
  transition:all 200ms var(--ease);cursor:default;
}
.level-card:hover{
  transform:translateY(-2px);box-shadow:var(--shadow-md);
}
.level-card-icon{
  width:36px;height:36px;border-radius:var(--radius-md);
  display:flex;align-items:center;justify-content:center;
  margin-bottom:12px;font-size:1.1rem;
}
.level-card.general .level-card-icon{background:var(--level-general-bg);color:var(--level-general)}
.level-card.architect .level-card-icon{background:var(--level-architect-bg);color:var(--level-architect)}
.level-card.engineer .level-card-icon{background:var(--level-engineer-bg);color:var(--level-engineer)}
.level-card.developer .level-card-icon{background:var(--level-developer-bg);color:var(--level-developer)}
.level-card h3{font-size:0.95rem;font-weight:600;margin-bottom:4px}
.level-card p{font-size:0.82rem;color:var(--text-secondary);line-height:1.5}

/* Category Cards */
.section-title{
  font-family:var(--font-display);font-size:1.4rem;font-weight:400;
  margin-bottom:20px;letter-spacing:-0.01em;
}
.recent-pages{
  display:flex;flex-direction:column;gap:10px;margin-bottom:48px;
}
.recent-page-item{
  display:flex;align-items:baseline;gap:14px;
  padding:16px 18px;border-radius:var(--radius-md);
  background:var(--bg-surface);border:1px solid var(--border);
  transition:all 200ms var(--ease);text-decoration:none;color:var(--text-primary);
}
.recent-page-item:hover{
  border-color:var(--accent);box-shadow:var(--shadow-sm);
  transform:translateY(-1px);color:var(--text-primary);
}
.recent-page-info{flex:1;min-width:0}
.recent-page-info h3{font-size:0.92rem;font-weight:600;margin-bottom:2px;color:var(--text-primary)}
.recent-page-info p{font-size:0.78rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.recent-page-meta{
  display:flex;align-items:center;gap:10px;flex-shrink:0;
}
.recent-page-date{font-size:0.75rem;color:var(--text-secondary);white-space:nowrap}
.recent-page-levels{display:flex;gap:4px}
.content .recent-page-item{color:var(--text-primary);text-decoration:none}

/* --- Inline Search ----------------------------- */
.sidebar-search{position:relative}
.search-input-wrap{
  display:flex;align-items:center;gap:8px;
  padding:8px 12px;border-radius:var(--radius-md);
  background:var(--bg-sidebar-hover);
  border:1px solid var(--border-sidebar);
  transition:border-color 150ms var(--ease);
}
.search-input-wrap:focus-within{border-color:var(--accent)}
.search-input-wrap svg{width:15px;height:15px;color:var(--text-sidebar);opacity:0.5;flex-shrink:0}
.search-input-wrap input{
  flex:1;border:none;outline:none;background:none;
  font-family:var(--font-body);font-size:0.84rem;color:var(--text-sidebar-active);
  min-width:0;
}
.search-input-wrap input::placeholder{color:var(--text-sidebar);opacity:0.7}
.search-input-wrap kbd{flex-shrink:0;background:var(--bg-sidebar-active);border-color:var(--border-sidebar);color:#969ba3}

.search-dropdown{
  display:none;position:absolute;top:100%;left:0;right:0;
  margin-top:4px;max-height:360px;overflow-y:auto;
  background:var(--bg-surface);border-radius:var(--radius-md);
  box-shadow:var(--shadow-lg);border:1px solid var(--border);
  z-index:200;
}
.search-dropdown.open{display:block}
.search-empty-message{
  display:block;padding:16px;text-align:center;
  font-size:0.82rem;color:var(--text-tertiary);
}
.search-result-item{
  display:block;padding:10px 14px;text-decoration:none;
  color:var(--text-primary);border-bottom:1px solid var(--border-light);
  transition:background 100ms var(--ease);
}
.search-result-item:hover,.search-result-item.selected{background:var(--bg-body)}
.search-result-item:last-child{border-bottom:none}
.search-result-title{font-size:0.84rem;font-weight:600;margin-bottom:1px}
.search-result-path{font-size:0.7rem;color:var(--text-tertiary);margin-bottom:3px}
.search-result-snippet{font-size:0.76rem;color:var(--text-secondary);line-height:1.4}
.search-result-levels{display:flex;gap:4px;margin-top:5px}
.search-result-levels .level-badge{font-size:0.62rem;padding:1px 6px}

/* --- Draft Banner & Badge ---------------------- */
.draft-banner{
  padding:10px 20px;margin-bottom:24px;
  background:#fef3cd;border:1px solid #ffc107;border-radius:var(--radius-md);
  color:#856404;font-size:0.85rem;font-weight:600;letter-spacing:0.02em;
}
.draft-badge{
  display:inline-flex;align-items:center;
  padding:2px 8px;border-radius:20px;
  font-size:0.68rem;font-weight:700;letter-spacing:0.04em;
  text-transform:uppercase;
  background:#fef3cd;color:#856404;border:1px solid #ffc107;
  margin-left:4px;vertical-align:middle;
}
.nav-draft-dot{
  width:6px;height:6px;border-radius:50%;flex-shrink:0;
  background:#ffc107;opacity:0.9;
}

/* --- Hierarchy Depth Styling ------------------- */
.nav-category.depth-0 > .nav-category-toggle{font-size:0.84rem;font-weight:600}
.nav-category.depth-1 > .nav-category-toggle{font-size:0.82rem;font-weight:500;padding-left:28px}
.nav-category.depth-2 > .nav-category-toggle{font-size:0.80rem;font-weight:500;padding-left:36px}
.nav-category.depth-3 > .nav-category-toggle{font-size:0.78rem;font-weight:400;padding-left:44px}
.nav-category.depth-1 > .nav-subcategory .nav-item a{padding-left:42px}
.nav-category.depth-2 > .nav-subcategory .nav-item a{padding-left:50px}
.nav-category.depth-3 > .nav-subcategory .nav-item a{padding-left:58px}

/* Search draft badge */
.search-result-draft{
  display:inline-flex;align-items:center;
  padding:1px 6px;border-radius:10px;
  font-size:0.6rem;font-weight:700;letter-spacing:0.04em;
  text-transform:uppercase;
  background:#fef3cd;color:#856404;border:1px solid #ffc107;
  margin-left:6px;
}

/* --- Footer ------------------------------------ */
.main-footer{
  margin-top:auto;padding:24px 28px;
  border-top:1px solid var(--border-light);
  font-size:0.78rem;color:var(--text-tertiary);
  display:flex;align-items:center;justify-content:space-between;
}

/* --- Animations -------------------------------- */
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideDown{from{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

.fade-in{animation:slideIn 400ms var(--ease-out) both}
.fade-in-1{animation-delay:50ms}
.fade-in-2{animation-delay:100ms}
.fade-in-3{animation-delay:150ms}
.fade-in-4{animation-delay:200ms}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.01ms !important;
  }
  html{scroll-behavior:auto}
}

/* --- Mobile Overlay ---------------------------- */
.sidebar-overlay{
  display:none;position:fixed;inset:0;z-index:90;
  background:rgba(0,0,0,0.4);backdrop-filter:blur(2px);
}
.sidebar-overlay.active{display:block}

/* --- Responsive -------------------------------- */
@media(max-width:1180px){
  .toc{display:none}
}
@media(max-width:900px){
  .level-cards{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-close{display:flex}
  .main-wrapper{margin-left:0}
  .main-header{padding:0 16px}
  .menu-toggle{display:flex}
  .content-wrapper{padding:0 16px}
  .content{padding:24px 0 48px}
  .content h1{font-size:1.7rem}
  .content h2{font-size:1.3rem}
  .hero{margin:-24px -16px 32px;padding:32px 16px 24px}
  .hero-brand{font-size:2.2rem}
  .level-cards{grid-template-columns:1fr 1fr;gap:10px}
  .recent-page-item{flex-wrap:wrap}
  .recent-page-meta{width:100%;justify-content:flex-end}
  .main-footer{padding:20px 16px;flex-direction:column;gap:8px;text-align:center}
}
@media(max-width:480px){
  .level-cards{grid-template-columns:1fr}
  .hero-brand{font-size:1.8rem}
  .breadcrumbs{display:none}
}

/* --- Print ------------------------------------- */
@media print{
  .sidebar,.accent-bar,.main-header,.toc,.search-modal,.main-footer{display:none !important}
  .main-wrapper{margin-left:0 !important}
  .content{max-width:100% !important}
  body{background:#fff;color:#000}
}