.topbar-link.disabled {
  pointer-events: none;
  opacity: 0.5;
  cursor: not-allowed;
}
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root{
  --sidebar-w: 268px;
  --topbar-h: 56px;
  --blue: #1a6bbf;
  --blue-light: #e8f1fb;
  --blue-mid: #256BB5;
  --blue-dark: #1B3A6B;
  --bg: #f4f6f9;
  --bg-white: #ffffff;
  --border: #e2e8f0;
  --border-dark: #cbd5e1;
  --text: #1e293b;
  --text-muted: #475569;
  --text-light: #94a3b8;
  --success: #10b981;
  --warn: #f59e0b;
  --danger: #ef4444;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}

/* ════════════════════════════════════════
   TOP BAR
════════════════════════════════════════ */
.topbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--blue-dark);
  display: flex; align-items: center;
  padding: 0 1.25rem; gap: 1rem;
  z-index: 300;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

.topbar-logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-weight: 700; font-size: 1rem; color: #fff;
  text-decoration: none; width: var(--sidebar-w);
  flex-shrink: 0; letter-spacing: -0.01em;
}
.topbar-logo svg { width: 28px; height: 28px; flex-shrink: 0; }
.topbar-logo span { color: #fff; }

.topbar-center {
  flex: 1; display: flex; align-items: center;
  gap: 0.5rem; background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 6px; padding: 0.4rem 0.9rem;
  font-size: 0.83rem; color: rgba(255,255,255,0.55);
  max-width: 400px;
}

.topbar-right {
  margin-left: auto; display: flex; gap: 0.5rem; align-items: center;
}
.topbar-badge {
  padding: 0.2rem 0.75rem; border-radius: 999px;
  background: rgba(255,255,255,0.15);
  font-size: 0.78rem; font-weight: 600; color: #fff;
}
.topbar-link {
  padding: 0.3rem 0.8rem; border-radius: 6px;
  font-size: 0.8rem; font-weight: 500;
  color: rgba(255,255,255,0.75); text-decoration: none;
  transition: background 0.2s;
}
.topbar-link:hover { background: rgba(255,255,255,0.12); color: #fff; }

/* ════════════════════════════════════════
   LAYOUT WRAPPER
════════════════════════════════════════ */
.layout {
  display: flex;
  padding-top: var(--topbar-h);
  min-height: 100vh;
}

/* ════════════════════════════════════════
   SIDEBAR
════════════════════════════════════════ */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  position: fixed;
  top: var(--topbar-h); left: 0; bottom: 0;
  background: var(--bg-white);
  border-right: 1px solid var(--border);
  overflow-y: auto; overflow-x: hidden;
  padding: 1rem 0 6rem;
  z-index: 200;
}

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

.sidebar-tag {
  font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-light); padding: 0.8rem 1.2rem 0.4rem;
  border-top: 1px solid var(--border); margin-top: 0.5rem;
}
.sidebar-tag:first-child { border-top: none; margin-top: 0; }

/* Nav Items */
.nav-item { position: relative; }

.nav-link {
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.48rem 1.2rem;
  font-size: 0.875rem; font-weight: 500;
  color: var(--text-muted); text-decoration: none;
  border-right: 3px solid transparent;
  transition: all 0.15s ease;
  cursor: pointer; user-select: none;
  background: none; border-left: none;
  border-top: none; border-bottom: none;
  width: 100%; text-align: left;
}
.nav-icon { font-size: 0.95rem; flex-shrink: 0; width: 18px; text-align: center; }
/* Uniform grayscale icons — consistent professional look */
.nav-icon img {
  filter: grayscale(100%) opacity(0.55);
  transition: filter 0.2s ease;
}
.nav-link:hover .nav-icon img,
.nav-item.open > .nav-link .nav-icon img {
  filter: grayscale(100%) opacity(0.75);
}
.nav-link.active .nav-icon img {
  filter: grayscale(60%) opacity(0.85) brightness(0.7);
}
.nav-label { flex: 1; }
.nav-arrow {
  font-size: 0.65rem; color: var(--text-light);
  transition: transform 0.2s ease; margin-left: auto;
}

.nav-link:hover { background: #f0f5ff; color: var(--blue); }
.nav-link.active {
  background: var(--blue-light); color: var(--blue);
  border-right-color: var(--blue); font-weight: 600;
}
.nav-item.open > .nav-link { color: var(--blue); background: #f0f5ff; }
.nav-item.open > .nav-link .nav-arrow { transform: rotate(90deg); color: var(--blue); }

/* Sub items */
.sub-items {
  display: none;
  padding: 0.15rem 0 0.25rem;
  background: #fafbfd;
  border-bottom: 1px solid var(--border);
}
.nav-item.open > .sub-items { display: block; }

.sub-link {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.35rem 1.2rem 0.35rem 2.8rem;
  font-size: 0.82rem; color: var(--text-muted);
  text-decoration: none; cursor: pointer;
  transition: all 0.15s;
  border-right: 3px solid transparent;
}
.sub-link::before {
  content: '·'; color: var(--text-light);
  font-size: 1.1rem; line-height: 1;
}
.sub-link:hover { color: var(--blue); background: #e8f1fb; }
.sub-link.active { color: var(--blue); font-weight: 600; border-right-color: var(--blue); }

/* ════════════════════════════════════════
   MAIN CONTENT
════════════════════════════════════════ */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 2rem 2.5rem 4rem;
  max-width: 960px;
  min-height: calc(100vh - var(--topbar-h));
}

/* ════════════════════════════════════════
   SECTIONS
════════════════════════════════════════ */
.doc-section {
  display: none;
}
.doc-section.active {
  display: block;
  animation: fadeSlide 0.22s ease;
}
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ════════════════════════════════════════
   PAGE HEADER
════════════════════════════════════════ */
.page-header {
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid var(--border);
}
.breadcrumb {
  font-size: 0.75rem; color: var(--text-light);
  margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.4rem;
}
.breadcrumb span { color: var(--blue); font-weight: 500; }
.page-header h1 {
  font-size: 1.8rem; font-weight: 700; color: var(--text);
  line-height: 1.2; margin-bottom: 0.5rem;
}
.page-header > p { font-size: 0.92rem; color: var(--text-muted); max-width: 640px; }

/* ════════════════════════════════════════
   HEADINGS
════════════════════════════════════════ */
.section-title {
  font-size: 1.12rem; font-weight: 700; color: var(--text);
  margin: 1.8rem 0 0.8rem;
  padding-bottom: 0.45rem;
  border-bottom: 2px solid var(--border);
  display: flex; align-items: center; gap: 0.45rem;
}
.sub-section-title {
  font-size: 0.95rem; font-weight: 600;
  color: var(--blue-mid); margin: 1.2rem 0 0.5rem;
  display: flex; align-items: center; gap: 0.4rem;
}
.sub-section-title::before { content: '▸'; color: var(--blue-mid); font-size: 0.8rem; }

/* ════════════════════════════════════════
   PROSE
════════════════════════════════════════ */
p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0.75rem; line-height: 1.7; }
strong { color: var(--text); font-weight: 600; }
ul, ol { color: var(--text-muted); font-size: 0.875rem; padding-left: 1.4rem; margin-bottom: 0.75rem; }
li { margin-bottom: 0.25rem; line-height: 1.6; }

code {
  background: #f0f4f8; border: 1px solid #dce4ed;
  border-radius: 4px; padding: 0.1rem 0.4rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.81rem; color: #0369a1;
  word-break: break-word;
}

pre {
  background: #0d1117; border-radius: var(--radius);
  padding: 1.1rem 1.25rem; overflow-x: auto;
  margin: 0.75rem 0 1rem; border: 1px solid #1e2d3d;
}
pre code {
  background: none; border: none; color: #79c0ff;
  font-size: 0.82rem; padding: 0; word-break: normal;
}

/* ════════════════════════════════════════
   TABLES — Fixed layout, no overflow
════════════════════════════════════════ */
.table-wrap { width: 100%; overflow-x: auto; margin: 0.75rem 0 1.25rem; border-radius: var(--radius); box-shadow: var(--shadow); }

.doc-table {
  width: 100%; border-collapse: collapse;
  font-size: 0.845rem; background: var(--bg-white);
  min-width: 480px;
}
.doc-table th {
  background: var(--blue-dark); color: #fff;
  padding: 0.65rem 1rem; text-align: left;
  font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.04em; white-space: nowrap;
}
.doc-table th:first-child { border-radius: 0; }
.doc-table td {
  padding: 0.6rem 1rem; border-bottom: 1px solid var(--border);
  color: var(--text-muted); vertical-align: top;
  word-break: break-word; line-height: 1.55;
}
.doc-table tr:last-child td { border-bottom: none; }
.doc-table tr:nth-child(even) td { background: #f8fafc; }
.doc-table tr:hover td { background: var(--blue-light); }
.doc-table td:first-child { color: var(--text); font-weight: 500; }
.doc-table td code { font-size: 0.78rem; }

/* ════════════════════════════════════════
   CARDS GRID
════════════════════════════════════════ */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 0.9rem; margin: 0.75rem 0 1.25rem;
}
.card {
  background: var(--bg-white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.1rem 1.2rem;
  transition: all 0.18s;
}
.card:hover {
  border-color: var(--blue); box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card-icon { font-size: 1.4rem; margin-bottom: 0.5rem; }
.card h3 { font-size: 0.88rem; font-weight: 700; color: var(--text); margin-bottom: 0.3rem; }
.card p { font-size: 0.82rem; color: var(--text-muted); margin: 0; line-height: 1.5; }

/* ════════════════════════════════════════
   ALERTS
════════════════════════════════════════ */
.alert {
  border-radius: var(--radius); padding: 0.8rem 1rem;
  margin: 0.75rem 0; font-size: 0.875rem;
  display: flex; gap: 0.65rem; align-items: flex-start;
}
.alert-icon { font-size: 1rem; flex-shrink: 0; margin-top: 0.05rem; }
.alert-info  { background: #eff6ff; border: 1px solid #bfdbfe; color: #1e40af; }
.alert-warn  { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; }
.alert-success { background: #f0fdf4; border: 1px solid #bbf7d0; color: #14532d; }
.alert a { color: inherit; font-weight: 600; }

/* ════════════════════════════════════════
   STEPS
════════════════════════════════════════ */
.steps { list-style: none; counter-reset: step; padding: 0; }
.step-item {
  counter-increment: step;
  display: flex; gap: 0.85rem;
  margin-bottom: 1rem; align-items: flex-start;
}
.step-item::before {
  content: counter(step);
  flex-shrink: 0; width: 26px; height: 26px;
  background: var(--blue-dark); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700; color: #fff;
  margin-top: 0.05rem;
}
.step-body h4 { font-size: 0.88rem; font-weight: 600; color: var(--text); margin-bottom: 0.2rem; }
.step-body p  { margin: 0; font-size: 0.845rem; }

/* ════════════════════════════════════════
   LAYER BOXES
════════════════════════════════════════ */
.layer {
  border-radius: var(--radius); padding: 1rem 1.2rem;
  margin-bottom: 0.75rem; border-left: 4px solid;
}
.layer-1 { background: #eef5ff; border-color: #3b82f6; }
.layer-2 { background: #e9f9f0; border-color: #10b981; }
.layer-3 { background: #fef9ec; border-color: #f59e0b; }
.layer-label {
  font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.2rem;
}
.layer-1 .layer-label { color: #2563eb; }
.layer-2 .layer-label { color: #059669; }
.layer-3 .layer-label { color: #d97706; }
.layer h3 { font-size: 0.92rem; font-weight: 700; color: var(--text); margin-bottom: 0.4rem; }
.layer ul { padding-left: 1.2rem; font-size: 0.845rem; color: var(--text-muted); margin: 0; }
.layer li { margin-bottom: 0.2rem; }

/* ════════════════════════════════════════
   KEY-VALUE GRID
════════════════════════════════════════ */
.kv-grid {
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; margin: 0.75rem 0 1.25rem;
  background: var(--bg-white); box-shadow: var(--shadow);
}
.kv-row { display: grid; grid-template-columns: minmax(180px, 220px) 1fr; }
.kv-row > * { padding: 0.55rem 1rem; border-bottom: 1px solid var(--border); font-size: 0.855rem; line-height: 1.5; }
.kv-row:last-child > * { border-bottom: none; }
.kv-row:nth-child(even) > * { background: #f8fafc; }
.kv-key { font-weight: 600; color: var(--text); }
.kv-val { color: var(--text-muted); word-break: break-word; }

/* ════════════════════════════════════════
   BADGES
════════════════════════════════════════ */
.badge {
  display: inline-flex; align-items: center;
  padding: 0.18rem 0.6rem; border-radius: 999px;
  font-size: 0.74rem; font-weight: 600;
}
.badge-blue   { background: #dbeafe; color: #1d4ed8; }
.badge-green  { background: #dcfce7; color: #15803d; }
.badge-orange { background: #ffedd5; color: #c2410c; }
.badge-red    { background: #fee2e2; color: #b91c1c; }
.badge-purple { background: #ede9fe; color: #6d28d9; }

/* ════════════════════════════════════════
   PREV / NEXT
════════════════════════════════════════ */
.doc-nav-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 2.5rem; padding-top: 1.25rem;
  border-top: 2px solid var(--border);
}
.pn-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 1.25rem; border-radius: var(--radius);
  border: 1px solid var(--border-dark);
  font-size: 0.85rem; font-weight: 500; color: var(--text-muted);
  background: var(--bg-white); cursor: pointer;
  transition: all 0.18s; text-decoration: none;
}
.pn-btn:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-light); }

/* ════════════════════════════════════════
   FOOTER
════════════════════════════════════════ */
.doc-footer {
  margin-left: var(--sidebar-w);
  border-top: 1px solid var(--border);
  padding: 1rem 2.5rem;
  font-size: 0.8rem; color: var(--text-light);
  background: var(--bg-white);
  display: flex; justify-content: space-between; align-items: center;
}

/* ════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════ */
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); transition: transform 0.25s; }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; padding: 1.5rem 1.25rem 3rem; }
  .doc-footer { margin-left: 0; }
  .topbar-logo { width: auto; }
  .topbar-center { display: none; }
}

/* ════════════════════════════════════════
   SIDEBAR SUPPORT BUTTON
════════════════════════════════════════ */
.sidebar-support {
  position: fixed;
  bottom: 0;
  left: 0;
  width: var(--sidebar-w);
  padding: 0.75rem 0.9rem;
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  z-index: 201;
}

.sidebar-support-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  background: linear-gradient(135deg, #eff6ff, #e8f4fd);
  border: 1px solid #bfdbfe;
  border-radius: 10px;
  text-decoration: none;
  transition: all 0.2s ease;
  width: 100%;
  cursor: pointer;
  font-family: inherit;
  outline: none;
  text-align: left;
}

.sidebar-support-btn:hover {
  background: linear-gradient(135deg, #dbeafe, #c7e9fb);
  border-color: var(--blue);
  box-shadow: 0 4px 12px rgba(26, 107, 191, 0.15);
  transform: translateY(-1px);
}

.sidebar-support-icon {
  flex-shrink: 0;
  width: 34px; height: 34px;
  background: var(--blue-dark);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}

.sidebar-support-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  overflow: hidden;
  text-align: left;
}

.sidebar-support-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--blue-dark);
  letter-spacing: 0.01em;
  text-align: left;
}

.sidebar-support-email {
  font-size: 0.65rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: left;
}