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

.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  max-width: var(--sidebar-width);
  height: 100%;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  transition: margin-left var(--transition-normal);
  overflow: hidden;
}

.sidebar.collapsed {
  margin-left: calc(var(--sidebar-width) * -1);
}

.sidebarHeader {
  padding: var(--space-2);
  border-bottom: 1px solid var(--border-subtle);
}

.tabs {
  display: flex;
  gap: var(--space-1);
  background-color: var(--bg-tertiary);
  padding: var(--space-1);
  border-radius: var(--radius-lg);
}

.tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

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

.tab.active {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  box-shadow: var(--shadow-sm);
}

.sidebarTitle {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
}

.sidebarContent {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.header {
  height: var(--header-height);
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.headerLeft {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.headerRight {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.toggleButton {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.toggleButton:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.content {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.chatArea {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.rightSidebar {
  width: 340px;
  min-width: 340px;
  max-width: 340px;
  height: 100%;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  transition: margin-right var(--transition-normal);
  overflow: hidden;
}

.rightSidebar.collapsed {
  margin-right: -340px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logoIcon {
  width: 24px;
  height: 24px;
  color: var(--accent-primary);
}

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

/* Header Center - Main Navigation Tabs */
.headerCenter {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.mainTabs {
  display: flex;
  gap: var(--space-1);
  background-color: var(--bg-tertiary);
  padding: var(--space-1);
  border-radius: var(--radius-lg);
}

.mainTab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mainTab:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.mainTab.active {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  box-shadow: var(--shadow-sm);
}

/* Settings Area - Full Screen */
.settingsArea {
  flex: 1;
  overflow-y: auto;
  background-color: var(--bg-primary);
}

/* Language Toggle Button */
.langToggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  height: 36px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  background-color: transparent;
  border: 1px solid var(--border-subtle);
}

.langToggle:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.langLabel {
  min-width: 20px;
  text-align: center;
}