/* ====================================================
   NAV STYLES CONTAINER LOGIC
   ==================================================== */
#app {
  display: flex;
  height: 100vh;
  transition: padding var(--transition), gap var(--transition);
}
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--transition), min-width var(--transition),
              margin var(--transition), border-radius var(--transition),
              background var(--transition), border var(--transition),
              box-shadow var(--transition);
  z-index: 50;
  flex-shrink: 0;
}
#content-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-radius var(--transition);
}
#topbar {
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 10px;
  flex-shrink: 0;
  transition: background var(--transition), border-radius var(--transition), border var(--transition);
}
#main-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}
#main-content::-webkit-scrollbar {
  width: 5px;
}
#main-content::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

/* ====================================================
   SIDEBAR NAV COMMON ITEMS
   ==================================================== */
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  transition: padding var(--transition), justify-content var(--transition);
}
.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-mark [data-lucide] {
  width: 16px;
  height: 16px;
  color: #fff;
}
.logo-text {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.3px;
  white-space: nowrap;
  transition: opacity var(--transition), width var(--transition);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.sidebar-nav::-webkit-scrollbar { width: 3px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.nav-group {
  margin-bottom: 8px;
}
.nav-group-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--text-muted);
  padding: 4px 8px 5px;
  white-space: nowrap;
  transition: opacity var(--transition);
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--r);
  color: var(--text-sub);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background .12s, color .12s, justify-content var(--transition);
  position: relative;
}
.nav-item:hover {
  background: var(--surface-2);
  color: var(--text);
}
.nav-item.active {
  background: var(--blue-bg);
  color: var(--blue);
}
.nav-item.active [data-lucide] {
  color: var(--blue);
}
.nav-item.disabled {
  opacity: .45;
  cursor: default;
  pointer-events: none;
}
.nav-label {
  overflow: hidden;
  white-space: nowrap;
  transition: opacity var(--transition), width var(--transition);
}
.sidebar-sep {
  height: 1px;
  background: var(--border);
  margin: 5px 8px;
}

.sidebar-footer {
  padding: 8px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  transition: padding var(--transition);
}
.user-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 8px;
  border-radius: var(--r);
  cursor: pointer;
  transition: background .12s, justify-content var(--transition);
}
.user-row:hover {
  background: var(--surface-2);
}
.user-info {
  overflow: hidden;
  white-space: nowrap;
  transition: opacity var(--transition), width var(--transition);
}
.user-name {
  font-size: 12px;
  font-weight: 600;
}
.user-role {
  font-size: 11px;
  color: var(--text-muted);
}

/* ====================================================
   TOOLTIP UTILITY (For icon-only and rail navs)
   ==================================================== */
.nav-item::after {
  content: attr(data-tip);
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--surface-3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  z-index: 300;
  transition: opacity .12s;
  display: none;
}
.nav-item:hover::after {
  display: block;
  opacity: 1;
}

/* ====================================================
   STYLE A — Icon Only
   ==================================================== */
body.nav-a {
  --sidebar-w: 58px;
}
body.nav-a .logo-text,
body.nav-a .nav-group-label,
body.nav-a .nav-label,
body.nav-a .user-info {
  opacity: 0;
  width: 0;
  pointer-events: none;
}
body.nav-a .sidebar-logo { justify-content: center; padding: 14px 0; }
body.nav-a .nav-item { justify-content: center; padding: 9px 0; }
body.nav-a .user-row { justify-content: center; }
body.nav-a .nav-item::after { display: block; }

/* ====================================================
   STYLE B — Expanded Sidebar (Default)
   ==================================================== */
body.nav-b {
  --sidebar-w: 220px;
}

/* ====================================================
   STYLE C — Floating Rail
   ==================================================== */
body.nav-c {
  --sidebar-w: 64px;
}
body.nav-c #app {
  padding: 10px;
  gap: 10px;
}
body.nav-c #sidebar {
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(18, 18, 26, .88);
  backdrop-filter: blur(24px);
  min-width: 64px;
  width: 64px;
}
body.nav-c #content-wrapper {
  border-radius: 14px;
  overflow: hidden;
}
body.nav-c #topbar {
  border-radius: 14px 14px 0 0;
}
body.nav-c .logo-text,
body.nav-c .nav-group-label,
body.nav-c .nav-label,
body.nav-c .user-info {
  opacity: 0;
  width: 0;
  pointer-events: none;
}
body.nav-c .sidebar-logo { justify-content: center; padding: 14px 0; }
body.nav-c .nav-item { justify-content: center; padding: 9px 0; }
body.nav-c .user-row { justify-content: center; }
body.nav-c .nav-item::after { display: block; }

/* ====================================================
   STYLE D — Top Horizontal
   ==================================================== */
body.nav-d {
  --sidebar-w: 0px;
}
body.nav-d #sidebar {
  width: 0px;
  min-width: 0px;
  border-right: none;
  display: none;
}
body.nav-d #topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
}
/* Top navbar container injected in header for style D */
.topbar-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: 32px;
  height: 100%;
}
.topbar-nav .nav-item {
  height: 100%;
  border-radius: 0;
  background: none !important;
  border-bottom: 2px solid transparent;
  padding: 0 4px;
  font-weight: 600;
  color: var(--text-sub);
}
.topbar-nav .nav-item.active {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

/* ====================================================
   STYLE E — Hover Expand Rail
   ==================================================== */
body.nav-e {
  --sidebar-w: 58px;
}
body.nav-e #sidebar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 58px;
  min-width: 58px;
  box-shadow: 10px 0 30px rgba(0, 0, 0, 0.3);
}
body.nav-e #content-wrapper {
  margin-left: 58px;
}
body.nav-e .logo-text,
body.nav-e .nav-group-label,
body.nav-e .nav-label,
body.nav-e .user-info {
  opacity: 0;
  width: 0;
  pointer-events: none;
}
body.nav-e .sidebar-logo { justify-content: center; padding: 14px 0; }
body.nav-e .nav-item { justify-content: center; padding: 9px 0; }
body.nav-e .user-row { justify-content: center; }

/* Hover active state */
body.nav-e #sidebar:hover {
  width: 220px;
  min-width: 220px;
  background: var(--surface-2);
}
body.nav-e #sidebar:hover .logo-text {
  opacity: 1;
  width: auto;
}
body.nav-e #sidebar:hover .nav-group-label {
  opacity: 1;
}
body.nav-e #sidebar:hover .nav-label {
  opacity: 1;
  width: auto;
}
body.nav-e #sidebar:hover .user-info {
  opacity: 1;
  width: auto;
}
body.nav-e #sidebar:hover .sidebar-logo { justify-content: flex-start; padding: 14px 12px; }
body.nav-e #sidebar:hover .nav-item { justify-content: flex-start; padding: 8px 10px; }
body.nav-e #sidebar:hover .user-row { justify-content: flex-start; }

/* ====================================================
   STYLE F — Hybrid Two-Tier
   ==================================================== */
body.nav-f {
  --sidebar-w: 48px;
}
body.nav-f #sidebar {
  border-right: 1px solid var(--border);
  background: #09090c;
  z-index: 100;
}
body.nav-f .sidebar-logo {
  display: none; /* Logo is moved to top tier header */
}
body.nav-f .logo-text,
body.nav-f .nav-group-label,
body.nav-f .nav-label,
body.nav-f .user-info {
  opacity: 0;
  width: 0;
  pointer-events: none;
}
body.nav-f .nav-item { justify-content: center; padding: 9px 0; }
body.nav-f .user-row { justify-content: center; }
body.nav-f .nav-item::after { display: block; }

/* Hybrid Top Bar adjustment */
.top-tier-brand {
  display: none;
  align-items: center;
  gap: 10px;
  margin-right: 20px;
}
body.nav-f .top-tier-brand {
  display: flex;
}
body.nav-f #topbar {
  background: var(--surface-2);
}