/* ============================================================
   nav.css — Sidebar (desktop) + Bottom drawer (mobile)
   ============================================================ */

/* ── Layout shell ────────────────────────────────────────── */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.app-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ── Topbar ──────────────────────────────────────────────── */
.topbar {
  height: 52px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  padding: 0 1.25rem;
  gap: 1rem;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-user-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: color 0.15s;
}
.topbar-user-link:hover {
  color: var(--accent);
}

.topbar-logo {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  flex-shrink: 0;
}

.topbar-logo .logo-mark {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.topbar-spacer { flex: 1; }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.icon-btn svg { width: 16px; height: 16px; }
.icon-btn:hover { color: var(--text); border-color: var(--border-hi); background: var(--surface-2); }

.topbar-user {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  position: sticky;
  top: 0;
  height: 100vh;
  transition: width 0.3s ease;
}

.sidebar.collapsed {
  width: 60px;
}

.sidebar.collapsed .sidebar-inner {
  padding: 0.75rem 0 2rem;
}

.sidebar.collapsed .nav-section-label,
.sidebar.collapsed .nav-items {
  display: none;
}

.sidebar.collapsed .nav-section-btn {
  padding: 0.5rem 0;
  justify-content: center;
}

.sidebar.collapsed .nav-section-icon {
  opacity: 1;
}

.sidebar.collapsed .nav-chevron {
  display: none;
}

.sidebar.collapsed .nav-home {
  justify-content: center;
  padding: 0.5rem 0 0.75rem;
  border-right: 1px solid var(--border);
}

.sidebar.collapsed .nav-home svg {
  margin: 0;
}

.sidebar-inner {
  padding: 0.75rem 0 2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Section group */
.nav-section {
  margin-bottom: 0.25rem;
}

.nav-section-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1rem;
  background: transparent;
  border: none;
  color: var(--nav-idle);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-align: left;
  transition: color 0.15s, background 0.15s;
  border-radius: 0;
}

.nav-section-btn:hover { color: var(--text); background: var(--surface-2); }
.nav-section-btn.open  { color: var(--text); }

.nav-section-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.7;
}
.nav-section-icon svg { width: 100%; height: 100%; }

.nav-section-label { flex: 1; }

.nav-chevron {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.2s;
}
.nav-section-btn.open .nav-chevron { transform: rotate(90deg); }

/* Dropdown items */
.nav-items {
  display: none;
  flex-direction: column;
  padding: 0.15rem 0 0.15rem 2.4rem;
}
.nav-items.open { display: flex; }

.nav-item {
  padding: 0.38rem 0.75rem;
  font-size: 0.82rem;
  color: var(--nav-idle);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-decoration: none;
  display: block;
  border-left: 2px solid transparent;
}
.nav-item:hover   { color: var(--text); background: var(--surface-2); }
.nav-item.active  {
  color: var(--accent);
  background: var(--accent-glow);
  font-weight: 600;
  border-left-color: var(--accent);
}

/* Home link at top */
.nav-home {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--nav-idle);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
  transition: color 0.15s;
  cursor: pointer;
}
.nav-home:hover, .nav-home.active { color: var(--accent); }
.nav-home svg { width: 16px; height: 16px; flex-shrink: 0; }
.nav-home span { display: none; }

/* Standalone nav link (e.g. Staff Codex) — sits inline after sections */
.nav-standalone {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--nav-idle);
  text-decoration: none;
  border-top: 1px solid var(--border);
  margin-top: 0.25rem;
  transition: color 0.15s, background 0.15s;
}
.nav-standalone:hover  { color: var(--text); background: var(--surface-2); }
.nav-standalone.active { color: var(--accent); font-weight: 600; }
.nav-standalone svg    { width: 16px; height: 16px; flex-shrink: 0; opacity: 0.7; }
.nav-standalone span   { flex: 1; }

.sidebar.collapsed .nav-standalone {
  justify-content: center;
  padding: 0.5rem 0;
}
.sidebar.collapsed .nav-standalone span { display: none; }

.mobile-nav-drawer .nav-standalone {
  padding: 0.6rem 1.25rem;
  font-size: 0.88rem;
}

/* ── Page area ───────────────────────────────────────────── */
.page-area {
  flex: 1;
  padding: 2rem 2.5rem;
  max-width: 1200px;
  width: 100%;
}

/* ── Mobile nav ──────────────────────────────────────────── */
.mobile-nav-toggle {
  display: none;
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 200;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  color: #000;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  align-items: center;
  justify-content: center;
}
.mobile-nav-toggle svg { width: 22px; height: 22px; }

.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 150;
  backdrop-filter: blur(2px);
}

.mobile-nav-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 160;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-radius: 16px 16px 0 0;
  padding: 0.5rem 0 2rem;
  max-height: 80vh;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
}

.mobile-nav-drawer.open {
  transform: translateY(0);
}

.mobile-drawer-handle {
  width: 40px;
  height: 4px;
  border-radius: 2px;
  background: var(--border-hi);
  margin: 0.5rem auto 1rem;
}

/* Mobile nav reuses sidebar nav-section / nav-items styles */
.mobile-nav-drawer .nav-section-btn { padding: 0.6rem 1.25rem; }
.mobile-nav-drawer .nav-items       { padding-left: 2.8rem; }
.mobile-nav-drawer .nav-item        { padding: 0.45rem 0.75rem; font-size: 0.88rem; }
.mobile-nav-drawer .nav-home        { padding: 0.6rem 1.25rem 0.8rem; }

/* Site admin button (bottom of sidebar/drawer) */
.nav-content {
  flex: 1;
}

.nav-site-admin-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
  transition: color 0.15s, background 0.15s;
}
.nav-site-admin-btn:hover { color: var(--accent); background: var(--surface-2); }
.nav-site-admin-btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.sidebar.collapsed .nav-site-admin-btn {
  justify-content: center;
  padding: 0.5rem 0;
}
.sidebar.collapsed .nav-site-admin-btn span {
  display: none;
}

.mobile-nav-drawer .nav-site-admin-btn {
  padding: 0.6rem 1.25rem;
  font-size: 0.88rem;
}

/* ── Single page mode (full width, no sidebar, no topbar) ─── */
body.singlepage .sidebar {
  display: none;
}

body.singlepage #sidebar-toggle {
  display: none;
}

body.singlepage .topbar {
  display: none;
}

/* Floating theme toggle, kiosk mode only (topbar's copy is hidden above) */
.singlepage-theme-toggle {
  display: none;
}

body.singlepage .singlepage-theme-toggle {
  display: flex;
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1000;
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

body.singlepage .singlepage-theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-hi);
  background: var(--surface-2);
}

body.singlepage .singlepage-theme-toggle svg {
  width: 16px;
  height: 16px;
}

/* Invisible corner tap target, kiosk mode only — Ctrl/Cmd+click exits.
   No visual affordance on purpose (kiosk viewers aren't meant to notice
   it); deliberately not display:none so it stays a real click target. */
.singlepage-exit-btn {
  display: none;
}

body.singlepage .singlepage-exit-btn {
  display: block;
  position: fixed;
  bottom: 0;
  right: 0;
  z-index: 1000;
  width: 48px;
  height: 48px;
  border: none;
  background: transparent;
  cursor: default;
  padding: 0;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar             { display: none; }
  .mobile-nav-toggle   { display: flex; }
  .page-area           { padding: 1.25rem 1rem 5rem; }
}

@media (min-width: 769px) {
  .mobile-nav-overlay,
  .mobile-nav-drawer,
  .mobile-nav-toggle { display: none !important; }
}