/* ============================================
   RAGpy Layout System
   Modern SaaS Layout Components
   ============================================ */

/* ----------------------------------------
   App Shell
   ---------------------------------------- */
.app-shell {
  display: flex;
  min-height: 100vh;
  background: var(--color-bg-primary);
}

.app-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  transition: margin-left var(--transition-base);
}

.app-shell.has-sidebar .app-content {
  margin-left: var(--sidebar-width);
}

.app-shell.sidebar-collapsed .app-content {
  margin-left: var(--sidebar-collapsed-width);
}

/* ----------------------------------------
   Topbar / Navbar
   ---------------------------------------- */
.topbar {
  height: var(--topbar-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  text-decoration: none;
}

.topbar-brand-logo {
  width: 32px;
  height: 32px;
}

.topbar-brand-text {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.topbar-brand-name {
  font-weight: var(--font-bold);
  color: var(--color-brand-primary);
}

.topbar-brand-tagline {
  font-size: var(--text-xs);
  font-weight: var(--font-normal);
  color: var(--color-text-tertiary);
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-8);
}

.topbar-nav-item {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

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

.topbar-nav-item.active {
  color: var(--color-brand-primary);
  background: var(--color-brand-primary-light);
}

.topbar-spacer {
  flex: 1;
}

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

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

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

.topbar-action.has-notification {
  position: relative;
}

.topbar-action.has-notification::after {
  content: '';
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--color-error);
  border-radius: 50%;
  border: 2px solid var(--color-surface);
}

/* User Menu */
.topbar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.topbar-user:hover {
  background: var(--color-bg-tertiary);
}

.topbar-user-avatar {
  width: 32px;
  height: 32px;
}

.topbar-user-info {
  display: none;
}

@media (min-width: 768px) {
  .topbar-user-info {
    display: block;
    text-align: right;
  }

  .topbar-user-name {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
  }

  .topbar-user-role {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
  }
}

.topbar-user-dropdown {
  width: 12px;
  height: 12px;
  color: var(--color-text-tertiary);
  transition: transform var(--transition-fast);
}

.topbar-user.active .topbar-user-dropdown {
  transform: rotate(180deg);
}

/* ----------------------------------------
   Sidebar
   ---------------------------------------- */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  z-index: var(--z-fixed);
  transition: width var(--transition-base), transform var(--transition-base);
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar-header {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  overflow: hidden;
}

.sidebar-logo {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.sidebar-logo svg {
  width: 100%;
  height: 100%;
}

.sidebar-brand-text {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-brand-primary);
  white-space: nowrap;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-brand-text {
  opacity: 0;
  width: 0;
}

.sidebar-toggle {
  position: absolute;
  right: -12px;
  top: 72px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  color: var(--color-text-tertiary);
  transition: all var(--transition-fast);
  z-index: 1;
}

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

.sidebar.collapsed .sidebar-toggle svg {
  transform: rotate(180deg);
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  padding: var(--space-4);
  overflow-y: auto;
}

.sidebar-nav-section {
  margin-bottom: var(--space-6);
}

.sidebar-nav-title {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.collapsed .sidebar-nav-title {
  opacity: 0;
  height: 0;
  padding: 0;
  margin: 0;
}

.sidebar-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-nav-item {
  margin-bottom: var(--space-1);
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  overflow: hidden;
}

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

.sidebar-nav-link.active {
  background: var(--color-brand-primary-light);
  color: var(--color-brand-primary);
}

.sidebar-nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-nav-text {
  flex: 1;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-nav-text {
  opacity: 0;
  width: 0;
}

.sidebar-nav-badge {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  background: var(--color-brand-primary);
  color: white;
  border-radius: var(--radius-full);
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-nav-badge {
  opacity: 0;
  width: 0;
  padding: 0;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.sidebar-user:hover {
  background: var(--color-bg-tertiary);
}

.sidebar-user-avatar {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-user-info {
  opacity: 0;
  width: 0;
}

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

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

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

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

  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-fixed) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .sidebar.open + .sidebar-overlay {
    opacity: 1;
    visibility: visible;
  }

  .app-shell.has-sidebar .app-content {
    margin-left: 0;
  }
}

/* ----------------------------------------
   Main Content Area
   ---------------------------------------- */
.main {
  flex: 1;
  padding: var(--space-6);
  max-width: var(--content-max-width);
  margin: 0 auto;
  width: 100%;
}

.main-full {
  max-width: none;
  padding: var(--space-6);
}

.main-narrow {
  max-width: 800px;
}

/* Page Header */
.page-header {
  margin-bottom: var(--space-6);
}

.page-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.page-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin: 0;
}

.page-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

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

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.breadcrumb-item {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.breadcrumb-item a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--color-brand-primary);
}

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

.breadcrumb-item.current {
  color: var(--color-text-primary);
  font-weight: var(--font-medium);
}

/* ----------------------------------------
   Grid System
   ---------------------------------------- */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.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); }
.grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
.grid-cols-6 { grid-template-columns: repeat(6, 1fr); }

.grid-cols-auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

/* Responsive Grid */
@media (max-width: 640px) {
  .sm\:grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .md\:grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1025px) {
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Column Span */
.col-span-1 { grid-column: span 1; }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-full { grid-column: 1 / -1; }

/* Row Span */
.row-span-1 { grid-row: span 1; }
.row-span-2 { grid-row: span 2; }
.row-span-3 { grid-row: span 3; }

/* ----------------------------------------
   Container
   ---------------------------------------- */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-sm { max-width: 640px; }
.container-md { max-width: 768px; }
.container-lg { max-width: 1024px; }
.container-xl { max-width: 1280px; }
.container-full { max-width: none; }

/* ----------------------------------------
   Section
   ---------------------------------------- */
.section {
  margin-bottom: var(--space-8);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.section-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

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

/* ----------------------------------------
   Auth Layout
   ---------------------------------------- */
.auth-layout {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: var(--color-bg-primary);
}

.auth-container {
  width: 100%;
  max-width: 420px;
}

.auth-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-logo {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
}

.auth-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2);
}

.auth-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.auth-footer {
  text-align: center;
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.auth-footer a {
  color: var(--color-brand-primary);
  font-weight: var(--font-medium);
}

/* Split Auth Layout */
.auth-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}

.auth-split-content {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
}

.auth-split-visual {
  background: linear-gradient(135deg, var(--color-brand-primary) 0%, var(--color-brand-secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
}

@media (max-width: 1024px) {
  .auth-split {
    grid-template-columns: 1fr;
  }

  .auth-split-visual {
    display: none;
  }
}

/* ----------------------------------------
   Dashboard Layout
   ---------------------------------------- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1280px) {
  .dashboard-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

/* ----------------------------------------
   Settings Layout
   ---------------------------------------- */
.settings-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-8);
  max-width: 1000px;
}

.settings-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.settings-nav-item {
  margin-bottom: var(--space-1);
}

.settings-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

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

.settings-nav-link.active {
  background: var(--color-brand-primary-light);
  color: var(--color-brand-primary);
}

.settings-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.settings-section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-4);
}

.settings-section-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

@media (max-width: 768px) {
  .settings-layout {
    grid-template-columns: 1fr;
  }

  .settings-nav {
    display: flex;
    overflow-x: auto;
    gap: var(--space-1);
    padding-bottom: var(--space-4);
    margin-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }

  .settings-nav-link {
    white-space: nowrap;
  }
}

/* ----------------------------------------
   Pipeline Layout (RAGpy specific)
   ---------------------------------------- */
.pipeline-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-6);
  min-height: calc(100vh - var(--topbar-height) - var(--space-12));
}

.pipeline-sidebar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  position: sticky;
  top: calc(var(--topbar-height) + var(--space-6));
  height: fit-content;
  max-height: calc(100vh - var(--topbar-height) - var(--space-12));
  overflow-y: auto;
}

.pipeline-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.pipeline-step {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.pipeline-step.active {
  border-color: var(--color-brand-primary);
  box-shadow: 0 0 0 3px var(--color-brand-primary-light);
}

.pipeline-step.completed {
  border-color: var(--color-success);
}

.pipeline-step.locked {
  opacity: 0.6;
  pointer-events: none;
}

.pipeline-step-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
}

.pipeline-step-number {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border-radius: 50%;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-tertiary);
  flex-shrink: 0;
}

.pipeline-step.active .pipeline-step-number {
  background: var(--color-brand-primary);
  color: white;
}

.pipeline-step.completed .pipeline-step-number {
  background: var(--color-success);
  color: white;
}

.pipeline-step-title {
  flex: 1;
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
}

.pipeline-step-status {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.pipeline-step-content {
  padding: var(--space-5);
}

@media (max-width: 1024px) {
  .pipeline-layout {
    grid-template-columns: 1fr;
  }

  .pipeline-sidebar {
    position: static;
    max-height: none;
  }
}

/* ----------------------------------------
   Centered Layout
   ---------------------------------------- */
.centered-layout {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.centered-content {
  width: 100%;
  max-width: 600px;
  text-align: center;
}

/* ----------------------------------------
   Split Layout
   ---------------------------------------- */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}

.split-layout-panel {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
}

.split-layout-panel-center {
  align-items: center;
  justify-content: center;
}

@media (max-width: 1024px) {
  .split-layout {
    grid-template-columns: 1fr;
  }
}

/* ----------------------------------------
   Full Page Layout (no sidebar)
   ---------------------------------------- */
.full-page-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.full-page-content {
  flex: 1;
  padding: var(--space-6);
}

/* ----------------------------------------
   Responsive Helpers
   ---------------------------------------- */
@media (max-width: 640px) {
  .hide-sm { display: none !important; }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .hide-md { display: none !important; }
}

@media (min-width: 1025px) {
  .hide-lg { display: none !important; }
}

@media (max-width: 1024px) {
  .show-lg-only { display: none !important; }
}

@media (min-width: 1025px) {
  .show-mobile-only { display: none !important; }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-text-secondary);
}

@media (max-width: 1024px) {
  .mobile-menu-toggle {
    display: flex;
  }
}

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