/* Slide Console Style Guide - CSS Implementation */

/* ============================================
   CSS Custom Properties (Theme Tokens)
   ============================================ */

:root {
  /* Light Mode Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f7f9fc;
  --bg-sidebar: #ffffff;
  --bg-header: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #6b7280;
  --border-default: #e5e7eb;
  --accent-primary: #2196f3;
  --accent-success: #4caf50;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --accent-info: #3b82f6;

  /* Badge colors - Light */
  --badge-success-bg: #dcfce7;
  --badge-success-text: #166534;
  --badge-warning-bg: #fef3c7;
  --badge-warning-text: #854d0e;
  --badge-danger-bg: #fee2e2;
  --badge-danger-text: #991b1b;
  --badge-info-bg: #dbeafe;
  --badge-info-text: #1e40af;
  --badge-neutral-bg: #f3f4f6;
  --badge-neutral-text: #6b7280;

  /* Spacing Scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Layout */
  --header-height: 56px;
  --sidebar-width: 200px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  /* Dark Mode Colors */
  --bg-primary: #1a1a2e;
  --bg-secondary: #252541;
  --bg-sidebar: #1a1a2e;
  --bg-header: #1a1a2e;
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --border-default: #374151;
  --accent-primary: #3b82f6;
  --accent-success: #22c55e;
  --accent-warning: #eab308;
  --accent-danger: #ef4444;

  /* Badge colors - Dark */
  --badge-success-bg: #166534;
  --badge-success-text: #22c55e;
  --badge-warning-bg: #854d0e;
  --badge-warning-text: #eab308;
  --badge-danger-bg: #991b1b;
  --badge-danger-text: #ef4444;
  --badge-info-bg: #1e40af;
  --badge-info-text: #3b82f6;
  --badge-neutral-bg: #374151;
  --badge-neutral-text: #9ca3af;

  /* Shadows - darker */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
}

/* ============================================
   Box Sizing Reset
   ============================================ */

*, *::before, *::after {
  box-sizing: border-box;
}

/* ============================================
   Typography
   ============================================ */

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  margin: 0;
  padding: 0;
}

.mono, code, pre, .font-mono {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

h1, .h1 {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
  margin: 0 0 var(--space-sm) 0;
}

h2, .h2 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin: 0 0 var(--space-sm) 0;
}

h3, .h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin: 0 0 var(--space-xs) 0;
}

.text-muted {
  color: var(--text-secondary) !important;
}

.text-small, .small {
  font-size: 12px;
  line-height: 1.4;
}

/* ============================================
   Layout - Header, Sidebar, Main
   ============================================ */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-primary);
  color: white;
  padding: var(--space-sm) var(--space-md);
  z-index: 100;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 0;
}

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

/* Header */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-default);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  z-index: 1000;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-logo:hover {
  color: var(--accent-primary);
  text-decoration: none;
}

.brand-logo-img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

/* Menu Toggle Button */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-primary);
  transition: background 0.15s ease;
}

.menu-toggle:hover {
  background: var(--bg-secondary);
}

.menu-toggle i {
  font-size: 20px;
}

/* App Body (Sidebar + Main) */
.app-body {
  display: flex;
  flex: 1;
  margin-top: var(--header-height);
}

/* Sidebar */
.app-sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-default);
  overflow-y: auto;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 900;
}

.app-sidebar.collapsed {
  transform: translateX(-100%);
}

.sidebar-nav {
  padding: var(--space-md) 0;
}

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

.sidebar-section-title {
  padding: var(--space-sm) var(--space-md);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
}

.sidebar-divider {
  height: 1px;
  background: var(--border-default);
  margin: var(--space-sm) var(--space-md);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px var(--space-md);
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.15s ease;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-item.active {
  color: var(--accent-primary);
  border-left-color: var(--accent-primary);
  background: var(--bg-secondary);
}

.nav-item i {
  font-size: 20px;
  width: 20px;
  text-align: center;
}

.nav-item span {
  font-size: 14px;
  font-weight: 500;
}

/* Main Content */
.app-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: var(--space-lg);
  background: var(--bg-primary);
  min-height: calc(100vh - var(--header-height));
  transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-collapsed .app-main {
  margin-left: 0;
}

.content-container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.content-narrow {
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.page-header .page-title {
  margin: 0 0 var(--space-xs) 0;
}

.page-header .page-subtitle {
  margin: 0;
  color: var(--text-secondary);
}

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

/* Auth Layout (no sidebar) */
.auth-layout .app-sidebar {
  display: none;
}

.auth-layout .app-main {
  margin-left: 0;
}

/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--bg-primary);
  border-radius: 8px;
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-sm);
  transition: all 0.15s ease;
  overflow: hidden;
}

.card-body {
  padding: 20px;
  min-width: 0;
}

.card-header {
  padding: var(--space-md) 20px;
  border-bottom: 1px solid var(--border-default);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
}

.card-header .see-all {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-primary);
  text-decoration: none;
}

.card-header .see-all:hover {
  text-decoration: underline;
}

/* Stat Cards */
.stat-card {
  background: var(--bg-secondary);
  border-radius: 8px;
  border: 1px solid var(--border-default);
  padding: 16px;
  text-align: left;
  min-height: 96px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: all 0.15s ease;
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent-primary);
  line-height: 1.2;
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

.stat-card .stat-icon {
  color: var(--accent-success);
  margin-left: var(--space-sm);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.card-grid .card {
  height: 100%;
}

.card-grid .card-body {
  display: flex;
  flex-direction: column;
}

.card-grid .card-body .card-actions {
  margin-top: var(--space-md);
}

.card-compact .card-body {
  padding: 16px;
}

.card-compact .card-header {
  padding: 12px 16px;
}

/* ============================================
  Detail Page Helpers
  ============================================ */

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
}

.soft-card {
  background: var(--bg-secondary);
}

.section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.code-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  padding: 10px 12px;
  width: 100%;
}

.code-card .code-text {
  flex: 1;
  min-width: 0;
  font-size: 12px;
  word-break: break-all;
  background: transparent;
  padding: 0;
}

.code-card pre.code-text {
  white-space: pre-wrap;
}

.code-actions {
  display: inline-flex;
  gap: var(--space-xs);
}

.details-summary {
  cursor: pointer;
  font-size: 13px;
}

.details-content {
  margin-top: var(--space-sm);
  padding-left: var(--space-md);
  font-size: 13px;
}

/* Student Cards */
.student-card {
  transition: all 0.2s ease;
}

.student-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Clickable cards */
.card-clickable {
  cursor: pointer;
}

.card-clickable:hover {
  border-color: var(--accent-primary);
}

/* View toggle buttons */
.view-toggle {
  display: inline-flex;
  background: var(--bg-secondary);
  border-radius: 8px;
  padding: 3px;
  gap: 2px;
}

.view-toggle-btn {
  border: none;
  border-radius: 6px;
  padding: 6px 10px;
  background: transparent;
  color: var(--text-secondary);
  transition: all 0.15s ease;
  line-height: 1;
}

.view-toggle-btn:hover {
  color: var(--text-primary);
  background: transparent;
}

.view-toggle-btn.active {
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

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

.view-toggle-btn i {
  font-size: 14px;
}

/* Student list view */
.student-list-container {
  overflow: hidden;
}

.student-list-table {
  margin: 0;
}

.student-list-table th {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
}

.student-list-table th.text-right,
.student-list-table td.text-right {
  text-align: right;
}

.student-list-row {
  cursor: pointer;
  transition: background 0.15s ease;
}

.student-list-row:hover {
  background: var(--bg-secondary);
}

.student-list-name {
  display: flex;
  align-items: center;
  font-weight: 500;
}

.justify-content-end {
  justify-content: flex-end;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
}

.btn-primary:hover {
  background: #1976d2;
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--border-default);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  color: var(--accent-primary);
}

.btn-outline-primary {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.btn-outline-primary:hover {
  background: var(--accent-primary);
  color: white;
}

.btn-outline-danger {
  background: transparent;
  color: var(--accent-danger);
  border: 1px solid var(--accent-danger);
}

.btn-outline-danger:hover {
  background: var(--accent-danger);
  color: white;
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  background: transparent;
  border-radius: 6px;
  flex-shrink: 0;
}

.btn-icon:hover {
  background: var(--bg-secondary);
}

.btn-action {
  background: #374151;
  color: white;
  padding: var(--space-sm) 12px;
  font-size: 12px;
}

.btn-action:hover {
  background: #4b5563;
  color: white;
}

.btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: 13px;
}

.btn-lg {
  padding: 12px var(--space-lg);
  font-size: 16px;
}

/* ============================================
   Badges
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: var(--badge-success-bg);
  color: var(--badge-success-text);
}

.badge-warning {
  background: var(--badge-warning-bg);
  color: var(--badge-warning-text);
}

.badge-danger {
  background: var(--badge-danger-bg);
  color: var(--badge-danger-text);
}

.badge-info {
  background: var(--badge-info-bg);
  color: var(--badge-info-text);
}

.badge-neutral {
  background: var(--badge-neutral-bg);
  color: var(--badge-neutral-text);
}

/* Legacy badge classes mapping */
.badge-running {
  background: var(--badge-success-bg);
  color: var(--badge-success-text);
}

.badge-stopped {
  background: var(--badge-danger-bg);
  color: var(--badge-danger-text);
}

/* ============================================
   Form Controls
   ============================================ */

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

.form-control, .form-select {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--text-primary);
  transition: all 0.15s ease;
}

.form-control:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.form-control::placeholder {
  color: var(--text-secondary);
}

.form-text {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

.input-group {
  display: flex;
}

.input-group .form-control {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.input-group-text {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  font-size: 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-left: none;
  border-radius: 0 6px 6px 0;
  color: var(--text-secondary);
}

.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.form-check-input {
  width: 18px;
  height: 18px;
  margin: 0;
  cursor: pointer;
}

.form-check-label {
  cursor: pointer;
}

/* ============================================
   Alerts
   ============================================ */

.alert {
  padding: var(--space-md);
  border-radius: 8px;
  border: 1px solid;
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.alert-success {
  background: #dcfce7;
  border-color: #86efac;
  color: #166534;
}

.alert-danger {
  background: #fee2e2;
  border-color: #fecaca;
  color: #991b1b;
}

.alert-warning {
  background: #fef3c7;
  border-color: #fcd34d;
  color: #854d0e;
}

.alert-info {
  background: #dbeafe;
  border-color: #93c5fd;
  color: #1e40af;
}

[data-theme="dark"] .alert-success {
  background: rgba(22, 101, 52, 0.3);
  border-color: #166534;
  color: #86efac;
}

[data-theme="dark"] .alert-danger {
  background: rgba(153, 27, 27, 0.3);
  border-color: #991b1b;
  color: #fecaca;
}

[data-theme="dark"] .alert-warning {
  background: rgba(133, 77, 14, 0.3);
  border-color: #854d0e;
  color: #fcd34d;
}

[data-theme="dark"] .alert-info {
  background: rgba(30, 64, 175, 0.3);
  border-color: #1e40af;
  color: #93c5fd;
}

/* ============================================
   Tables
   ============================================ */

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th {
  background: var(--bg-secondary);
  font-weight: 600;
  text-align: left;
  padding: 12px var(--space-md);
  border-bottom: 1px solid var(--border-default);
}

.table td {
  padding: 12px var(--space-md);
  border-bottom: 1px solid var(--border-default);
  vertical-align: middle;
}

.table tbody tr {
  background: var(--bg-primary);
  transition: background 0.15s ease;
}

.table tbody tr:hover {
  background: var(--bg-secondary);
}

.table tbody tr.selected {
  border-left: 3px solid var(--accent-primary);
}

/* ============================================
   Progress Bars
   ============================================ */

.progress {
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #2196f3, #21cbf3);
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* ============================================
   Log Output
   ============================================ */

.log-output {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  padding: var(--space-md);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  max-height: 400px;
  overflow-y: auto;
}

.log-output pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-primary);
}

/* ============================================
   Info List (key-value pairs)
   ============================================ */

.info-list {
  display: flex;
  flex-direction: column;
}

.info-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-default);
}

.info-row:last-child {
  border-bottom: none;
}

.info-label {
  color: var(--text-secondary);
}

.info-value {
  color: var(--text-primary);
  text-align: right;
}

/* ============================================
   Empty State
   ============================================ */

.empty-state {
  text-align: center;
  padding: var(--space-2xl);
}

.empty-state .empty-icon {
  font-size: 64px;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.empty-state h3 {
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.empty-state p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

/* ============================================
   Utility Classes
   ============================================ */

.text-primary-color {
  color: var(--accent-primary) !important;
}

.text-success {
  color: var(--accent-success) !important;
}

.text-warning {
  color: var(--accent-warning) !important;
}

.text-danger {
  color: var(--accent-danger) !important;
}

.bg-secondary {
  background: var(--bg-secondary) !important;
}

.border-default {
  border-color: var(--border-default) !important;
}

/* Flex utilities */
.d-flex {
  display: flex;
}

.align-items-center {
  align-items: center;
}

.justify-content-between {
  justify-content: space-between;
}

.gap-1 {
  gap: var(--space-xs);
}

.gap-2 {
  gap: var(--space-sm);
}

.gap-3 {
  gap: var(--space-md);
}

.flex-grow-1 {
  flex-grow: 1;
}

/* Margin utilities */
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }

.me-1 { margin-right: var(--space-xs); }
.me-2 { margin-right: var(--space-sm); }

.ms-1 { margin-left: var(--space-xs); }
.ms-2 { margin-left: var(--space-sm); }

/* Padding utilities */
.p-3 { padding: var(--space-md); }
.p-4 { padding: var(--space-lg); }
.py-2 { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-4 { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }
.py-5 { padding-top: var(--space-2xl); padding-bottom: var(--space-2xl); }

/* Width utilities */
.w-100 {
  width: 100%;
}

/* Text utilities */
.text-center {
  text-align: center;
}

/* ============================================
   Grid (Bootstrap-compatible)
   ============================================ */

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--space-md) * -0.5);
  align-items: flex-start;
}

.row.g-3 {
  margin: 0 calc(var(--space-md) * -0.5);
}

.row.g-3 > [class*="col"] {
  padding: calc(var(--space-md) * 0.5);
}

.row.g-4 {
  margin: 0 calc(var(--space-lg) * -0.5);
}

.row.g-4 > [class*="col"] {
  padding: calc(var(--space-lg) * 0.5);
}

[class*="col"] {
  padding: 0 calc(var(--space-md) * 0.5);
}

.col-md-4 { flex: 0 0 33.333%; max-width: 33.333%; }
.col-md-5 { flex: 0 0 41.666%; max-width: 41.666%; }
.col-md-6 { flex: 0 0 50%; max-width: 50%; }
.col-md-8 { flex: 0 0 66.666%; max-width: 66.666%; }
.col-lg-4 { flex: 0 0 33.333%; max-width: 33.333%; }
.col-lg-6 { flex: 0 0 50%; max-width: 50%; }
.col-lg-8 { flex: 0 0 66.666%; max-width: 66.666%; }

/* ============================================
   Responsive Behavior
   ============================================ */

@media (max-width: 1024px) {
  .app-sidebar {
    transform: translateX(-100%);
  }

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

  .app-main {
    margin-left: 0;
  }

  .col-lg-4, .col-lg-6, .col-lg-8 {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .app-header {
    padding: 0 var(--space-sm);
  }

  .header-center {
    display: none;
  }

  .app-main {
    padding: var(--space-md);
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .col-md-4, .col-md-5, .col-md-6, .col-md-8 {
    flex: 0 0 100%;
    max-width: 100%;
  }

  .stat-card .stat-value {
    font-size: 24px;
  }
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 850;
}

.sidebar-overlay.active {
  display: block;
}

/* ============================================
   Theme Toggle Button
   ============================================ */

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-primary);
  transition: background 0.15s ease;
}

.theme-toggle:hover {
  background: var(--bg-secondary);
}

.theme-toggle i {
  font-size: 20px;
}

/* ============================================
   Footer
   ============================================ */

.app-footer {
  padding: var(--space-lg);
  text-align: center;
  color: var(--text-secondary);
  font-size: 12px;
  border-top: 1px solid var(--border-default);
  background: var(--bg-primary);
}

/* ============================================
   Code display
   ============================================ */

code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-primary);
}

/* ============================================
   Links
   ============================================ */

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  text-decoration: underline;
}

/* ============================================
   Dividers
   ============================================ */

hr {
  border: none;
  border-top: 1px solid var(--border-default);
  margin: var(--space-md) 0;
}

/* ============================================
   List styles
   ============================================ */

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

/* ============================================
   Dropzone / File Upload
   ============================================ */

.dropzone {
  border: 2px dashed var(--border-default);
  border-radius: 12px;
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--bg-secondary);
}

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

.dropzone.dragover {
  border-color: var(--accent-primary);
  background: rgba(33, 150, 243, 0.05);
  transform: scale(1.01);
}

.dropzone-content {
  pointer-events: none;
}

.dropzone-icon {
  font-size: 48px;
  color: var(--accent-primary);
  margin-bottom: var(--space-md);
}

.dropzone h3 {
  margin: 0 0 var(--space-xs) 0;
  color: var(--text-primary);
}

.upload-progress {
  margin-top: var(--space-md);
}

/* ============================================
   File List
   ============================================ */

.file-list {
  display: flex;
  flex-direction: column;
}

.file-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--border-default);
  transition: background 0.15s ease;
}

.file-row:last-child {
  border-bottom: none;
}

.file-row:hover {
  background: var(--bg-secondary);
}

.file-row-icon {
  font-size: 20px;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.file-row-name {
  flex: 1;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}

.file-row-size {
  font-size: 13px;
  flex-shrink: 0;
  min-width: 70px;
  text-align: right;
}

.file-row-actions {
  display: flex;
  gap: var(--space-xs);
  flex-shrink: 0;
}

/* ============================================
   Modal / Preview
   ============================================ */

.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: 12px;
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-default);
}

.modal-header h3 {
  margin: 0;
  font-size: 16px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.modal-body {
  flex: 1;
  overflow: auto;
  padding: var(--space-lg);
}

.preview-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 4px;
}

.text-preview {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  padding: var(--space-md);
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 13px;
  max-height: 60vh;
  overflow: auto;
}

.markdown-preview {
  line-height: 1.6;
}

.markdown-preview h1 {
  font-size: 24px;
  border-bottom: 1px solid var(--border-default);
  padding-bottom: var(--space-sm);
  margin-top: var(--space-lg);
}

.markdown-preview h2 {
  font-size: 20px;
  border-bottom: 1px solid var(--border-default);
  padding-bottom: var(--space-xs);
  margin-top: var(--space-lg);
}

.markdown-preview h3 {
  font-size: 16px;
  margin-top: var(--space-md);
}

.markdown-preview pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 6px;
  padding: var(--space-md);
  overflow-x: auto;
}

.markdown-preview code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
}

.markdown-preview pre code {
  background: transparent;
  padding: 0;
}

.markdown-preview p {
  margin: var(--space-sm) 0;
}

.markdown-preview a {
  color: var(--accent-primary);
}

/* ============================================
   Screenshot Thumbnails
   ============================================ */

/* Dashboard card thumbnails */
.screenshot-thumbnail-container {
  position: relative;
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
}

.screenshot-thumbnail-link {
  display: block;
  position: relative;
}

.screenshot-thumbnail {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.2s ease;
}

.screenshot-thumbnail-link:hover .screenshot-thumbnail {
  transform: scale(1.02);
}

.screenshot-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.screenshot-overlay i {
  font-size: 24px;
  color: white;
}

.screenshot-thumbnail-link:hover .screenshot-overlay {
  opacity: 1;
}

.screenshot-timestamp {
  display: block;
  font-size: 11px;
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-default);
}

.screenshot-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  color: var(--text-secondary);
  aspect-ratio: 16 / 9;
}

.screenshot-placeholder i {
  font-size: 32px;
  margin-bottom: var(--space-sm);
  opacity: 0.5;
}

.screenshot-placeholder span {
  font-size: 12px;
}

/* Student detail page screenshot */
.screenshot-detail-container {
  position: relative;
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
}

.screenshot-detail-link {
  display: block;
  position: relative;
}

.screenshot-detail-img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.2s ease;
}

.screenshot-detail-link:hover .screenshot-detail-img {
  transform: scale(1.02);
}

.screenshot-detail-link:hover .screenshot-overlay {
  opacity: 1;
}

.screenshot-placeholder-detail {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 6px;
}

.screenshot-placeholder-detail i {
  font-size: 40px;
  margin-bottom: var(--space-sm);
  opacity: 0.5;
}

.screenshot-placeholder-detail span {
  font-size: 13px;
}

/* Screenshot footer with timestamp and capture button */
.screenshot-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-default);
}

.screenshot-footer-empty {
  justify-content: flex-end;
  border-top: none;
  background: transparent;
  position: absolute;
  bottom: var(--space-xs);
  right: var(--space-xs);
  padding: 0;
}

.screenshot-footer .screenshot-timestamp {
  display: block;
  font-size: 11px;
  padding: 0;
  background: none;
  border: none;
}

/* Capture button */
.btn-capture {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: none;
  background: var(--bg-primary);
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.15s ease;
  border: 1px solid var(--border-default);
}

.btn-capture:hover {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

.btn-capture i {
  font-size: 12px;
}

/* Capture overlay */
.screenshot-capture-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  gap: var(--space-xs);
  z-index: 10;
}

.screenshot-spinner {
  font-size: 20px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Make screenshot container position relative for overlay */
.screenshot-thumbnail-container {
  position: relative;
}

/* Ensure zoom overlay doesn't conflict with capture overlay */
.screenshot-zoom {
  z-index: 5;
}

/* Mini screenshots for list view */
.screenshot-col-header {
  width: 64px;
}

.screenshot-col {
  width: 64px;
  padding: 8px var(--space-md) !important;
}

.screenshot-mini {
  width: 48px;
  height: 27px;
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  flex-shrink: 0;
}

.screenshot-mini-link {
  display: block;
  width: 100%;
  height: 100%;
}

.screenshot-mini-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.15s ease;
}

.screenshot-mini-link:hover .screenshot-mini-img {
  transform: scale(1.1);
}

.screenshot-mini-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  opacity: 0.4;
}

.screenshot-mini-placeholder i {
  font-size: 14px;
}

/* ============================================
   Avatar Styles
   ============================================ */

/* Inline avatar icon (used in headers and lists) */
.student-avatar-icon {
  width: 1em;
  height: 1em;
  border-radius: 50%;
  object-fit: cover;
  vertical-align: middle;
  flex-shrink: 0;
}

/* Adjust avatar size in different contexts */
h1 .student-avatar-icon,
h3 .student-avatar-icon {
  width: 0.9em;
  height: 0.9em;
}

/* Student list name alignment (for list view in dashboard) */
.student-list-name {
  display: flex;
  align-items: center;
}

.student-list-name .student-avatar-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.student-list-name .bi-globe2 {
  width: 18px;
  height: 18px;
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Avatar upload container */
.avatar-upload-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 180px;
  background: var(--bg-secondary);
  border-radius: 8px;
  border: 1px solid var(--border-default);
}

/* Avatar preview */
.avatar-preview-container {
  padding: var(--space-md);
}

.avatar-preview-img {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  margin: 0 auto;
  border: 3px solid var(--border-default);
  box-shadow: var(--shadow-md);
}

/* Avatar placeholder */
.avatar-placeholder {
  text-align: center;
  color: var(--text-secondary);
  padding: var(--space-lg);
}

.avatar-placeholder i {
  font-size: 4rem;
  opacity: 0.3;
  display: block;
  margin-bottom: var(--space-sm);
}

.avatar-placeholder span {
  font-size: 0.9rem;
}

/* Avatar Dropzone */
.avatar-dropzone {
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px dashed var(--border-default);
  border-radius: 8px;
}

.avatar-dropzone:hover {
  border-color: var(--accent-primary);
  background: var(--bg-secondary);
}

.avatar-dropzone.dragover {
  border-color: var(--accent-primary);
  background: rgba(33, 150, 243, 0.08);
  transform: scale(1.02);
}

.avatar-placeholder-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  color: var(--text-secondary);
  min-height: 160px;
}

.avatar-placeholder-dropzone i {
  font-size: 2.5rem;
  opacity: 0.5;
  margin-bottom: var(--space-sm);
  color: var(--accent-primary);
}

.avatar-placeholder-dropzone span {
  font-size: 0.9rem;
  font-weight: 500;
}

.avatar-placeholder-dropzone small {
  font-size: 0.8rem;
  opacity: 0.7;
  margin-top: var(--space-xs);
}

.avatar-dropzone:hover .avatar-placeholder-dropzone i {
  opacity: 0.8;
}

/* When avatar exists, make container clickable for replacement */
.avatar-dropzone .avatar-preview-container {
  position: relative;
}

.avatar-dropzone .avatar-preview-container::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0);
  transition: background 0.2s ease;
  border-radius: 50%;
}

.avatar-dropzone:hover .avatar-preview-container::after {
  background: rgba(0, 0, 0, 0.3);
}

.avatar-dropzone .avatar-preview-container::before {
  content: '\F149';  /* Bootstrap icon for camera */
  font-family: 'bootstrap-icons';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.5rem;
  color: white;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 1;
}

.avatar-dropzone:hover .avatar-preview-container::before {
  opacity: 1;
}

/* Avatar actions */
.avatar-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.avatar-actions label {
  cursor: pointer;
  margin-bottom: 0;
}

.avatar-actions label.disabled {
  pointer-events: none;
  opacity: 0.6;
}

/* ============================================
   Settings Page
   ============================================ */

/* Password Cards Row */
.password-cards-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

/* OAuth Cards Row */
.oauth-cards-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

@media (max-width: 768px) {
  .password-cards-row,
  .oauth-cards-row {
    grid-template-columns: 1fr;
  }
}

/* API Provider Cards */
.api-provider-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  transition: border-color 0.2s ease;
}

.api-provider-card:hover {
  border-color: var(--accent-primary);
}

.api-provider-card:last-child {
  margin-bottom: 0;
}

.api-provider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-default);
}

.api-provider-id {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
  color: var(--accent-primary);
  font-weight: 500;
}

.api-provider-fields {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.api-provider-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.api-provider-field-full {
  width: 100%;
}

.api-provider-actions {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-default);
}

/* Add Provider Section */
.add-provider-section {
  background: var(--bg-secondary);
  border: 1px dashed var(--border-default);
  border-radius: 8px;
  padding: var(--space-lg);
}

.add-provider-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

@media (max-width: 768px) {
  .api-provider-row,
  .add-provider-row {
    grid-template-columns: 1fr;
  }
}

/* Empty State Inline */
.empty-state-inline {
  padding: var(--space-md);
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-radius: 8px;
  display: flex;
  align-items: center;
}

/* Admin OAuth Access List */
.admin-oauth-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.admin-oauth-entry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 6px;
  transition: border-color 0.2s ease;
}

.admin-oauth-entry:hover {
  border-color: var(--border-hover);
}

.admin-oauth-value {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.admin-oauth-value i {
  color: var(--text-secondary);
}

/* ============================================
   Section Dividers (Card Grouping)
   ============================================ */

.section-divider {
  display: flex;
  align-items: center;
  margin: var(--space-md) 0;
  color: var(--text-secondary);
}

.section-divider-text {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.section-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-default);
  margin-left: var(--space-md);
}

/* First section divider doesn't need top margin */
.section-divider:first-child {
  margin-top: 0;
}

/* ============================================
   Docs Page Tabs
   ============================================ */

.docs-tabs {
  display: flex;
  gap: var(--space-xs);
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: var(--space-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.docs-tab {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.docs-tab.active {
  background: var(--bg-primary);
  color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
}

.docs-tab i {
  font-size: 16px;
}

.docs-tab .tab-badge {
  background: var(--badge-neutral-bg);
  color: var(--badge-neutral-text);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 500;
}

.docs-tab.active .tab-badge {
  background: var(--accent-primary);
  color: white;
}

/* Tab Panels */
.docs-tab-panel {
  display: none;
}

.docs-tab-panel.active {
  display: block;
}

/* Docs page specific improvements */
.docs-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.docs-section-header h2 {
  margin: 0;
  font-size: 18px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.docs-section-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  font-size: 14px;
}

/* Improved lesson content spacing */
.lesson-content-section {
  margin-bottom: var(--space-lg);
}

.lesson-content-section:last-child {
  margin-bottom: 0;
}

.lesson-content-section .section-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.lesson-content-section .section-label i {
  font-size: 14px;
}

/* Checkbox grid for API keys and skills */
.checkbox-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
}

.checkbox-grid .form-check {
  min-width: 140px;
}

/* Docs page responsive styles */
@media (max-width: 768px) {
  .docs-tabs {
    gap: 2px;
    padding: 3px;
  }
  
  .docs-tab {
    padding: 8px 12px;
    font-size: 13px;
  }
  
  .docs-tab i {
    font-size: 14px;
  }
  
  .docs-tab span:not(.tab-badge) {
    display: none;
  }
  
  .docs-tab .tab-badge {
    margin-left: 0;
  }
  
  .lesson-content {
    padding: var(--space-md);
  }
  
  .lesson-content-section {
    margin-bottom: var(--space-md);
  }
  
  .checkbox-grid {
    gap: var(--space-sm);
  }
  
  .checkbox-grid .form-check {
    min-width: 120px;
  }
}

@media (max-width: 480px) {
  .docs-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  
  .docs-tabs::-webkit-scrollbar {
    display: none;
  }
  
  .docs-tab {
    padding: 8px 10px;
  }
  
  .docs-tab .tab-badge {
    padding: 2px 6px;
    font-size: 11px;
  }
  
  .lesson-header {
    padding: var(--space-sm) var(--space-md);
  }
  
  .lesson-header .d-flex {
    flex-wrap: wrap;
    gap: var(--space-xs);
  }
  
  .lesson-header .badge {
    font-size: 10px;
    padding: 2px 6px;
  }
  
  .checkbox-grid .form-check {
    min-width: 100%;
  }
}