/* App Shell */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
  width: 100vw;
  overflow: hidden;
  transition: grid-template-columns var(--transition-normal);
}

.app-shell.collapsed {
  grid-template-columns: var(--sidebar-collapsed-width) 1fr;
}

.main-wrapper {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-primary);
}

.main-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
}

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  transition: width var(--transition-normal);
  overflow: hidden;
  z-index: var(--z-sidebar);
}

.sidebar__logo {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  border-bottom: 1px solid var(--border-light);
  gap: var(--space-sm);
  white-space: nowrap;
  flex-shrink: 0;
}

.sidebar__logo svg {
  width: 28px;
  height: 28px;
  color: var(--accent-primary);
}

.sidebar__logo-text {
  font-weight: 700;
  font-size: var(--text-lg);
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar__logo-text {
  opacity: 0;
  pointer-events: none;
}

.sidebar__nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.sidebar__section-title {
  text-transform: uppercase;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  padding: var(--space-sm) var(--space-sm) var(--space-xs) var(--space-sm);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.sidebar.collapsed .sidebar__section-title {
  display: none;
}

.sidebar__menu-item {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  gap: 12px;
  text-decoration: none;
}

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

.sidebar__menu-item.active {
  background-color: var(--accent-primary-light);
  color: var(--accent-primary);
  font-weight: 600;
}

.sidebar__icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar__icon svg {
  width: 100%;
  height: 100%;
}

.sidebar__label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: var(--text-sm);
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar__label {
  opacity: 0;
  width: 0;
  pointer-events: none;
}

.sidebar__footer {
  padding: var(--space-md);
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  overflow: hidden;
}

.sidebar__footer-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: var(--bg-active);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.sidebar__footer-info {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar__footer-info {
  opacity: 0;
  width: 0;
  pointer-events: none;
}

.sidebar__footer-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__footer-role {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__toggle {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  margin: var(--space-xs) auto;
  transition: color var(--transition-fast);
}

.sidebar__toggle:hover {
  color: var(--text-primary);
}

/* Header */
.header {
  height: var(--header-height);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--space-lg);
  flex-shrink: 0;
  z-index: var(--z-header);
}

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

.header__mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
}

.header__mobile-toggle:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.header__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.header__breadcrumb-separator {
  color: var(--text-tertiary);
}

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

.header__user-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.header__user-info:hover {
  background-color: var(--bg-hover);
}

.header__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 600;
}

/* Page Layout */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.page-title {
  font-size: var(--text-2xl);
  font-weight: 700;
}

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

.content-grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Sidebar Backdrop (mobile) */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: calc(var(--z-sidebar) - 1);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.sidebar-backdrop.active {
  display: block;
  opacity: 1;
  pointer-events: all;
}

/* Responsive Layout Adjustments */
@media (max-width: 1024px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  
  .app-shell.collapsed {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    position: fixed;
    left: -var(--sidebar-width);
    width: var(--sidebar-width);
    transition: left var(--transition-normal);
  }
  
  .sidebar.open {
    left: 0;
  }
  
  .header__mobile-toggle {
    display: flex;
  }
  
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .main-content {
    padding: var(--space-md);
  }
  
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  
  .grid-cols-2, .grid-cols-3, .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}