/* Admin shell layout */
.admin-shell {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
  width: 260px;
  background-color: var(--primary-dark);
  color: white;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 50;
  transition: transform var(--transition-slow);
}

.sidebar-header {
  padding: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar-header img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.sidebar-header h2 {
  font-size: 1rem;
  color: white;
  font-weight: 600;
}

.sidebar-header span {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  display: block;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-sm) 0;
  overflow-y: auto;
}

.sidebar-section {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.4);
  margin-top: var(--space-sm);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px var(--space-lg);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  transition: all var(--transition);
  text-decoration: none;
  border-left: 3px solid transparent;
}

.sidebar-link:hover {
  background-color: rgba(255, 255, 255, 0.08);
  color: white;
}

.sidebar-link.active {
  background-color: rgba(255, 255, 255, 0.12);
  color: white;
  border-left-color: var(--secondary);
}

.sidebar-link-icon {
  width: 20px;
  text-align: center;
  font-size: 1rem;
}

.sidebar-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logout {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  background: none;
  border: none;
  cursor: pointer;
  width: 100%;
  transition: color var(--transition);
}

.sidebar-logout:hover {
  color: var(--error);
}

/* Main content area */
.admin-main {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Admin header bar */
.admin-header {
  background: var(--surface);
  border-bottom: 1px solid var(--divider);
  padding: 0 var(--space-xl);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 40;
}

.admin-header-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.admin-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--text);
}

.admin-header-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.admin-header-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Content area */
.admin-content {
  flex: 1;
  padding: var(--space-xl);
  background-color: var(--bg);
}

/* Page loading */
.page-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--divider);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Mobile sidebar overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 45;
}

/* Responsive */
@media (max-width: 1024px) {
  .admin-sidebar {
    transform: translateX(-100%);
  }

  .admin-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.open {
    display: block;
  }

  .admin-main {
    margin-left: 0;
  }

  .admin-menu-toggle {
    display: block;
  }

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