.app {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--topbar-height) 1fr;
  grid-template-areas:
    "sidebar topbar"
    "sidebar content";
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ─────────────────────────────── */
.sidebar {
  grid-area: sidebar;
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-3) 0;
  gap: var(--space-1);
  z-index: 20;
}

.sidebar-logo {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--color-accent);
  color: var(--color-on-accent);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  flex-shrink: 0;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  width: 100%;
  padding: 0 var(--space-2);
}

.sidebar-nav-bottom {
  margin-top: auto;
}

.nav-btn {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
  position: relative;
}

.nav-btn:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.nav-btn.active {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.nav-btn svg { width: 20px; height: 20px; }

.nav-btn .nav-tooltip {
  display: none;
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-text-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  z-index: 100;
}

.nav-btn:hover .nav-tooltip { display: block; }

/* ── Topbar ──────────────────────────────── */
.topbar {
  grid-area: topbar;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  gap: var(--space-4);
  z-index: 10;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.topbar-org {
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-md);
  color: var(--color-text-primary);
}

.topbar-center { flex: 1; display: flex; justify-content: center; }

.search-box {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-3);
  width: 100%;
  max-width: 420px;
  transition: border-color var(--transition-fast);
}

.search-box:focus-within { border-color: var(--color-accent); }

.search-box svg { width: 16px; height: 16px; color: var(--color-text-tertiary); flex-shrink: 0; }

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  width: 100%;
  color: var(--color-text-primary);
  font-size: var(--text-sm);
}

.search-box input::placeholder { color: var(--color-text-tertiary); }

.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.topbar-icon-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
  position: relative;
}

.topbar-icon-btn:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.topbar-icon-btn svg { width: 20px; height: 20px; }

.notif-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--color-error);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-bg);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: grid;
  place-items: center;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-inverse);
  cursor: pointer;
}

.user-menu {
  position: absolute;
  top: calc(var(--topbar-height) - 4px);
  right: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  padding: var(--space-2);
  z-index: 50;
}

.user-menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.user-menu-item:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.user-menu-item.danger { color: var(--color-error); }
.user-menu-item.danger:hover { background: var(--color-error-light); }

.user-menu-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-1) 0;
}

.user-menu-version {
  padding: var(--space-2) var(--space-3) var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.user-menu-version:empty {
  display: none;
}

.user-menu-header {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
}

.user-menu-header .name {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.user-menu-header .email {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* ── Content ─────────────────────────────── */
.content {
  grid-area: content;
  overflow-y: auto;
  padding: var(--space-6) var(--space-8);
  background: var(--color-bg-secondary);
}

.page-header {
  margin-bottom: var(--space-6);
}

.page-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.page-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* ── Dashboard / Two-Column Grid ──────────── */
.dash-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.ai-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-6);
  height: calc(100vh - 200px);
}

.mobile-search-btn { display: none; }

/* ── Mobile Search Overlay ──────────────── */
.mobile-search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
}

.mobile-search-overlay .search-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.mobile-search-overlay .search-header input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  font-size: var(--text-md);
  color: var(--color-text-primary);
}

.mobile-search-overlay .search-header input::placeholder {
  color: var(--color-text-tertiary);
}

.mobile-search-overlay .mobile-search-results {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2);
}

.mobile-search-overlay .search-item {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.mobile-search-overlay .search-item:active {
  background: var(--color-bg-secondary);
}

/* ── Mobile ──────────────────────────────── */
@media (max-width: 768px) {
  .app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
  }

  .topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    flex-shrink: 0;
  }

  .sidebar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    flex-direction: row;
    justify-content: space-evenly;
    border-right: none;
    border-top: 1px solid var(--color-border);
    padding: var(--space-1) 0;
    padding-bottom: env(safe-area-inset-bottom, 0);
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    z-index: 30;
    background: var(--color-bg);
  }

  .sidebar::-webkit-scrollbar { display: none; }

  .sidebar-logo { display: none; }

  .sidebar-nav {
    flex-direction: row;
    gap: 0;
    padding: 0;
    width: 100%;
    flex-wrap: nowrap;
    justify-content: space-evenly;
  }

  .sidebar-nav-bottom {
    margin-top: 0;
    display: flex;
    flex-direction: row;
    gap: 0;
  }

  .nav-btn {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
  }

  .nav-btn svg { width: 18px; height: 18px; }

  .nav-btn .nav-tooltip { display: none !important; }

  .topbar-center { display: none; }
  .topbar-left { flex: 1; }

  .mobile-search-btn { display: grid; }

  .content {
    flex: 1;
    padding: var(--space-3);
    /* Clear the fixed bottom nav (its height + the device safe-area inset it
       also reserves) so page content always ends above it. */
    padding-bottom: calc(52px + var(--space-3) + env(safe-area-inset-bottom, 0px));
    overflow-x: hidden;
    overflow-y: auto;
    width: 100%;
    max-width: 100vw;
  }

  .page-header { margin-bottom: var(--space-4); }
  .page-title { font-size: var(--text-xl); }

  .dash-grid, .grid-2col, .ai-layout { grid-template-columns: 1fr; gap: var(--space-4); }
  .ai-layout { height: auto; }
  .dash-grid { margin-top: var(--space-4); }
}

@media (max-width: 640px) {
  .stat-grid { grid-template-columns: 1fr 1fr; gap: var(--space-2); }
  .stat-card { padding: var(--space-3); }
  .stat-value { font-size: var(--text-2xl); }

  .topbar { padding: 0 var(--space-3); gap: var(--space-2); }
  .topbar-org { font-size: var(--text-sm); max-width: 100px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .topbar-left { gap: var(--space-2); }
  .topbar-right { gap: var(--space-1); }

  .content { padding: var(--space-3) var(--space-3); }
}

@media (max-width: 380px) {
  .stat-grid { grid-template-columns: 1fr; gap: var(--space-2); }
  .content { padding: var(--space-2); }
  .page-title { font-size: var(--text-lg); }
}