.app-shell {
  display: flex;
  min-height: 100vh;
  background: var(--bg);
  position: relative;
}

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 30;
  transition: width var(--transition-slow) var(--easing-smooth),
              transform var(--transition-slow) var(--easing-smooth);
}

.app-shell.collapsed .sidebar { width: 76px; }
.app-shell.collapsed .nav-item span,
.app-shell.collapsed .nav-section-label,
.app-shell.collapsed .sidebar-brand .brand-text,
.app-shell.collapsed .user-info-text {
  opacity: 0;
  pointer-events: none;
  width: 0;
  overflow: hidden;
  white-space: nowrap;
}
.app-shell.collapsed .sidebar-nav .nav-item { justify-content: center; padding-left: 0; padding-right: 0; }
.app-shell.collapsed .sidebar-footer { justify-content: center; padding-left: 0; padding-right: 0; }

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  min-height: 52px;
}
.sidebar-brand .brand-text {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--weight-bold);
  color: var(--text-strong);
  font-size: var(--text-md);
  transition: opacity var(--transition-fast);
}
.sidebar-brand .brand-text i {
  background: linear-gradient(135deg, var(--accent-400), var(--accent-600));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 1.2em;
}
.sidebar-toggle {
  width: 32px; height: 32px;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.sidebar-toggle:hover { background: var(--bg-muted); color: var(--text); }

.sidebar-nav {
  flex: 1;
  padding: var(--space-3) var(--space-2);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.nav-section-label {
  font-size: 0.65rem;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--text-soft);
  padding: var(--space-3) var(--space-3) var(--space-1);
}
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 8px 10px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-decoration: none;
  transition: background-color var(--transition-fast) var(--easing-smooth),
              color var(--transition-fast) var(--easing-smooth);
  position: relative;
}
.nav-item i {
  width: 18px;
  text-align: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}
.nav-item:hover {
  background: var(--bg-subtle);
  color: var(--text);
}
.nav-item.active {
  background: rgba(20, 184, 166, 0.10);
  color: var(--accent);
  font-weight: var(--weight-semibold);
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: -3px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: var(--accent);
  border-radius: var(--radius-full);
}
[data-theme="dark"] .nav-item.active { color: var(--accent-300); }

.sidebar-footer {
  padding: var(--space-3) var(--space-3);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 56px;
}
.user-mini {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
  min-width: 0;
}
.user-mini .avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-400), var(--accent-600));
  color: var(--text-invert);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--weight-semibold);
  font-size: var(--text-xs);
  flex-shrink: 0;
}
.user-info-text { min-width: 0; flex: 1; transition: opacity var(--transition-fast); }
.user-name {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--text-strong);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-role {
  font-size: var(--text-xs);
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.logout-btn {
  width: 32px; height: 32px;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.logout-btn:hover { background: rgba(239, 68, 68, 0.10); color: var(--state-danger); }

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 25;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  display: none;
}
.sidebar-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.main-area {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg-subtle);
}

.topbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 56px;
}
.mobile-toggle {
  display: inline-flex;
  width: 38px; height: 38px;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}
.mobile-toggle:hover { background: var(--bg-muted); }
.page-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--text-strong);
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}
.topbar-btn {
  width: 38px; height: 38px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.topbar-btn:hover { background: var(--bg-muted); color: var(--text); }
.topbar-btn .notif-dot {
  position: absolute;
  top: 8px; right: 9px;
  width: 8px; height: 8px;
  background: var(--state-danger);
  border-radius: 50%;
  border: 2px solid var(--surface);
  animation: vaia-pulse-ring 1.8s infinite;
}
.user-dropdown {
  position: relative;
}
.topbar-user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3) var(--space-1) var(--space-1);
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}
.topbar-user:hover { background: var(--bg-muted); border-color: var(--border-strong); }
.topbar-user .avatar-sm {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-400), var(--accent-600));
  color: var(--text-invert);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--weight-semibold);
  font-size: var(--text-xs);
}
.topbar-user .user-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.content-area {
  flex: 1;
  padding: var(--space-5);
  min-width: 0;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.page-header__title { margin: 0; }
.page-header__subtitle { color: var(--text-muted); font-size: var(--text-sm); margin-top: 2px; }
.page-header__actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.filter-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  margin-bottom: var(--space-4);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
  align-items: end;
}
.filter-bar .form-field { min-width: 0; }
.filter-bar__actions {
  grid-column: 1 / -1;
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  border-top: 1px solid var(--border);
  padding-top: var(--space-3);
}

.pagination {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-4);
  justify-content: flex-end;
}
.pagination button {
  min-width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}
.pagination button:hover:not(:disabled) {
  background: var(--bg-subtle);
  color: var(--text);
  border-color: var(--border-strong);
}
.pagination button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-invert);
  font-weight: var(--weight-semibold);
}
.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.pagination .info {
  color: var(--text-muted);
  font-size: var(--text-xs);
  margin-right: var(--space-3);
}