.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sidebar-logo {
  width: 42px;
  height: 42px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  color: white;
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sidebar-brand h1 {
  font-size: 1.05rem;
  color: var(--text-sidebar-active);
  font-weight: 700;
}

.sidebar-brand span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0.75rem;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-md);
  color: var(--text-sidebar);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  margin-bottom: 0.25rem;
  border: none;
  background: none;
  width: 100%;
  text-align: right;
  font-size: 0.95rem;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-sidebar-active);
  text-decoration: none;
}

.nav-item.active {
  background: var(--color-primary);
  color: white;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.85;
}

.sidebar-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.main-content {
  margin-right: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-header {
  height: var(--header-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.breadcrumb strong {
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.search-trigger {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.85rem;
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.85rem;
  min-width: 200px;
}

.search-trigger kbd {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-size: 0.75rem;
  margin-right: auto;
}

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-hover);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.page-container {
  padding: 1.5rem;
  flex: 1;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-header h2 {
  color: var(--text-primary);
}

.page-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-right: 0;
  }
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  .menu-toggle {
    display: flex !important;
  }
}

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-hover);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}