@layer components {
  .app-layout {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
  }

  /* Header */
  .app-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--color-nav-bg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    z-index: 100;
  }

  .app-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
  }

  .app-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    transition: opacity 0.2s ease;
  }

  .app-logo:hover {
    opacity: 0.8;
  }

  .app-logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
  }

  .app-logo-text {
    font-size: 1.5rem;
    font-weight: 700;
  }

  .app-header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
  }

  .account-menu {
    position: relative;
  }

  .account-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-background);
    color: var(--color-text);
    cursor: pointer;
    font-size: 0.9375rem;
  }

  .account-button:hover {
    background: var(--color-sidebar-item-hover);
  }

  .account-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 200px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
  }

  .account-dropdown.hidden {
    display: none;
  }

  .account-dropdown-item {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    border: none;
    background: none;
    text-align: left;
    color: var(--color-text);
    text-decoration: none;
    cursor: pointer;
    font-size: 0.9375rem;
  }

  .account-dropdown-item:hover {
    background: var(--color-sidebar-item-hover);
  }

  .account-dropdown-item:first-child {
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
  }

  .account-dropdown-item:last-child {
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
  }

  /* Main content area with sidebar */
  .app-body {
    display: flex;
    flex: 1;
  }

  /* Desktop sidebar */
  .sidebar {
    width: 240px;
    background: var(--color-sidebar-bg);
    border-right: 1px solid var(--color-border);
    padding: 1rem;
    height: calc(100vh - 64px);
    position: sticky;
    top: 64px;
    overflow-y: auto;
    display: none;
  }

  @media (min-width: 768px) {
    .sidebar {
      display: flex;
      flex-direction: column;
    }
  }

  .sidebar-section {
    margin-bottom: 1.5rem;
  }

  .sidebar-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
    padding: 0 0.75rem;
  }

  .sidebar-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 8px;
    text-decoration: none;
    color: var(--color-text);
    margin-bottom: 0.25rem;
    transition: background 0.2s ease;
    font-size: 0.9375rem;
  }

  .sidebar-item:hover {
    background: var(--color-sidebar-item-hover);
  }

  .sidebar-item.active {
    background: var(--color-sidebar-item-hover);
    font-weight: 600;
  }

  .sidebar-footer {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
  }

  /* Main content */
  .main-content {
    flex: 1;
    padding: 1rem;
    padding-bottom: 5rem; /* Space for mobile nav */
    max-width: 100%;
  }

  @media (min-width: 768px) {
    .main-content {
      padding: 2rem;
      padding-bottom: 2rem;
    }
  }

  /* Mobile navigation */
  .mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-nav-bg);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-around;
    padding: 0.75rem;
    z-index: 100;
  }

  @media (min-width: 768px) {
    .mobile-nav {
      display: none;
    }
  }

  .mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    text-decoration: none;
    color: var(--color-text);
    font-size: 0.75rem;
  }

  .mobile-nav-item.active {
    color: var(--color-link-hover);
    font-weight: 600;
  }
}