*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --deep-dark:      #141413;
  --dark-surface:   #30302e;
  --dark-elevated:  #3d3d3a;
  --dark-border:    #45443f;
  --border-strong:  #5e5d59;
  --warm-silver:    #bfbdb4;
  --stone-gray:     #9b9a93;
  --text-muted:     rgba(176,174,165,0.65);
  --terracotta:     #d97757;
  --coral:          #e68a6a;
  --brand-blue:     #6a9bcc;
  --sidebar-width:  260px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--deep-dark);
  color: var(--warm-silver);
  font-family: 'Poppins', system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--terracotta); text-decoration: none; }
a:hover { color: var(--coral); }

/* ── Nav ─────────────────────────────────────────────────────────── */

.docs-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(20,20,19,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--dark-border);
  height: 52px;
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 1.5rem;
}

.docs-nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--warm-silver);
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

.docs-nav-logo img { width: 20px; height: 20px; border-radius: 4px; }

.docs-nav-divider {
  color: var(--dark-border);
  font-size: 1.2rem;
  font-weight: 200;
  line-height: 1;
}

.docs-nav-title {
  font-size: 0.875rem;
  color: var(--stone-gray);
  font-weight: 500;
}

.docs-nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  font-size: 0.8rem;
  color: var(--stone-gray);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.nav-link:hover { color: var(--warm-silver); background: var(--dark-surface); }

.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0.35rem 0.85rem;
  border-radius: 8px;
  border: none;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, box-shadow 0.15s;
  background: var(--terracotta);
  color: #fff;
  box-shadow: 0 0 0 1px var(--terracotta);
}

.btn-nav:hover { background: var(--coral); box-shadow: 0 0 0 1px var(--coral); color: #fff; }

/* ── Layout ──────────────────────────────────────────────────────── */

.docs-layout {
  display: flex;
  padding-top: 52px;
  min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────────────── */

.docs-sidebar {
  position: fixed;
  top: 52px;
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - 52px);
  overflow-y: auto;
  padding: 1.5rem 0 2rem;
  border-right: 1px solid var(--dark-border);
  background: var(--deep-dark);
  scrollbar-width: thin;
  scrollbar-color: var(--dark-border) transparent;
}

.docs-sidebar::-webkit-scrollbar { width: 4px; }
.docs-sidebar::-webkit-scrollbar-track { background: transparent; }
.docs-sidebar::-webkit-scrollbar-thumb { background: var(--dark-border); border-radius: 2px; }

.sidebar-section { margin-bottom: 1.75rem; }

.sidebar-section-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--stone-gray);
  padding: 0 1.25rem;
  margin-bottom: 0.4rem;
}

.sidebar-link {
  display: block;
  padding: 0.3rem 1.25rem;
  font-size: 0.82rem;
  color: var(--stone-gray);
  border-left: 2px solid transparent;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
  line-height: 1.4;
}

.sidebar-link:hover {
  color: var(--warm-silver);
  background: rgba(255,255,255,0.03);
}

.sidebar-link.active {
  color: var(--terracotta);
  border-left-color: var(--terracotta);
  background: rgba(217,119,87,0.06);
}

.sidebar-link-sub {
  padding-left: 2.25rem;
  font-size: 0.78rem;
}

/* ── Content ─────────────────────────────────────────────────────── */

.docs-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  max-width: 780px;
  padding: 3rem 3.5rem 6rem;
}

/* ── Typography ──────────────────────────────────────────────────── */

.docs-content h1 {
  font-size: 1.875rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.docs-content .page-subtitle {
  font-size: 1.05rem;
  color: var(--stone-gray);
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.docs-content h2 {
  font-size: 1.2rem;
  font-weight: 600;
  color: #fff;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--dark-border);
}

.docs-content h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--warm-silver);
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}

.docs-content p {
  color: var(--stone-gray);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.docs-content ul, .docs-content ol {
  color: var(--stone-gray);
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  line-height: 1.8;
}

.docs-content li { margin-bottom: 0.2rem; }

.docs-content code {
  font-family: 'Courier New', monospace;
  font-size: 0.82rem;
  background: var(--dark-surface);
  box-shadow: 0 0 0 1px var(--dark-border);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  color: var(--terracotta);
}

.docs-content pre {
  background: var(--dark-surface);
  box-shadow: 0 0 0 1px var(--dark-border);
  border-radius: 8px;
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.25rem 0;
}

.docs-content pre code {
  background: none;
  box-shadow: none;
  padding: 0;
  color: var(--stone-gray);
  font-size: 0.82rem;
  line-height: 1.7;
}

.docs-content a { color: var(--terracotta); }
.docs-content a:hover { color: var(--coral); }

/* ── Callout boxes ───────────────────────────────────────────────── */

.callout {
  background: var(--dark-surface);
  box-shadow: 0 0 0 1px var(--dark-border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  display: flex;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--stone-gray);
  line-height: 1.6;
}

.callout-icon { flex-shrink: 0; margin-top: 0.05rem; }

.callout-note { border-left: 3px solid var(--brand-blue); }
.callout-tip  { border-left: 3px solid var(--terracotta); }
.callout-warn { border-left: 3px solid #c9a327; }

.callout strong { color: var(--warm-silver); }

/* ── Step list ───────────────────────────────────────────────────── */

.steps { list-style: none; padding: 0; counter-reset: steps; }

.steps li {
  counter-increment: steps;
  position: relative;
  padding-left: 2.75rem;
  margin-bottom: 1.25rem;
  color: var(--stone-gray);
  font-size: 0.9rem;
  line-height: 1.7;
}

.steps li::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0.15rem;
  width: 24px;
  height: 24px;
  background: rgba(217,119,87,0.12);
  box-shadow: 0 0 0 1px rgba(217,119,87,0.3);
  color: var(--terracotta);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ── UI label chips ──────────────────────────────────────────────── */

.ui-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background: var(--dark-elevated);
  box-shadow: 0 0 0 1px var(--dark-border);
  color: var(--warm-silver);
  vertical-align: middle;
}

/* ── Tab reference cards ─────────────────────────────────────────── */

.tab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.tab-card {
  background: var(--dark-surface);
  box-shadow: 0 0 0 1px var(--dark-border);
  border-radius: 8px;
  padding: 1rem;
  text-decoration: none;
  transition: box-shadow 0.15s;
  display: block;
}

.tab-card:hover { box-shadow: 0 0 0 1px var(--border-strong); }

.tab-card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--warm-silver);
  margin-bottom: 0.35rem;
}

.tab-card-desc {
  font-size: 0.78rem;
  color: var(--stone-gray);
  line-height: 1.5;
}

/* ── Page nav (prev/next) ────────────────────────────────────────── */

.page-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--dark-border);
}

.page-nav-btn {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1rem;
  background: var(--dark-surface);
  box-shadow: 0 0 0 1px var(--dark-border);
  border-radius: 8px;
  text-decoration: none;
  transition: box-shadow 0.15s;
  max-width: 48%;
}

.page-nav-btn:hover { box-shadow: 0 0 0 1px var(--border-strong); }

.page-nav-btn.next { text-align: right; margin-left: auto; }

.page-nav-label { font-size: 0.7rem; color: var(--stone-gray); }
.page-nav-title { font-size: 0.875rem; font-weight: 600; color: var(--warm-silver); }

/* ── Responsive ──────────────────────────────────────────────────── */

@media (max-width: 768px) {
  .docs-sidebar { display: none; }
  .docs-content { margin-left: 0; padding: 2rem 1.25rem 4rem; }
}