:root {
  /* Primary Colors */
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;
  
  /* Accent Colors */
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-orange: #f97316;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-yellow: #f59e0b;
  --accent-cyan: #06b6d4;
  
  /* Dark Theme Base */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-elevated: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.8);
  
  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-tertiary: #64748b;
  
  /* Border & Shadow */
  --border-color: rgba(148, 163, 184, 0.1);
  --border-hover: rgba(148, 163, 184, 0.2);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.3);
  --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  
  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Sidebar */
  --sidebar-width: 280px;
  --sidebar-collapsed: 72px;
  --header-height: 64px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Selection */
::selection {
  background: rgba(14, 165, 233, 0.3);
  color: var(--text-primary);
}

/* Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

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

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

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
}

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

.logo-icon {
  font-size: 1.5rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-purple));
  border-radius: var(--radius-lg);
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary), var(--primary-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-text,
.sidebar.collapsed .stat-label,
.sidebar.collapsed .user-info,
.sidebar.collapsed .action-text {
  display: none;
}

.sidebar-toggle {
  width: 32px;
  height: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

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

.sidebar-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-muted);
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.sidebar.collapsed .sidebar-toggle span:nth-child(2) {
  opacity: 0;
}

.sidebar.collapsed .sidebar-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Sidebar Stats - Compact Adaptive */
.sidebar-stats {
  display: flex;
  padding: var(--space-2) var(--space-3);
  gap: var(--space-2);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  min-height: auto;
}

.stat-mini {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex: 1;
  min-width: 40px;
  padding: var(--space-1) 0;
}

.stat-icon {
  font-size: 0.875rem;
  line-height: 1;
}

.stat-value {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  white-space: nowrap;
  line-height: 1;
}

/* Collapsed sidebar - ultra compact */
.sidebar.collapsed .sidebar-stats {
  flex-direction: column;
  padding: var(--space-2) var(--space-1);
  gap: var(--space-1);
}

.sidebar.collapsed .stat-mini {
  padding: var(--space-1) 0;
  flex-direction: row;
  justify-content: center;
  gap: 4px;
}

.sidebar.collapsed .stat-icon {
  font-size: 0.75rem;
}

.sidebar.collapsed .stat-value {
  font-size: 0.6875rem;
}

.sidebar.collapsed .stat-label {
  display: none;
}

/* Tablet adaptive for sidebar */
@media (max-width: 1200px) {
  .sidebar-stats {
    padding: var(--space-2) var(--space-3);
    gap: var(--space-2);
  }
  
  .stat-mini {
    gap: 2px;
    padding: var(--space-1) 0;
  }
}

/* Progress Ring - Adaptive */
.sidebar-progress {
  padding: var(--space-6) var(--space-5);
  display: flex;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
}

.progress-ring-wrapper {
  position: relative;
  width: clamp(80px, 15vw, 120px);
  height: clamp(80px, 15vw, 120px);
}

.progress-ring {
  transform: rotate(-90deg);
  width: 100%;
  height: 100%;
}

.progress-ring-bg {
  fill: none;
  stroke: var(--bg-tertiary);
  stroke-width: clamp(5px, 1vw, 8px);
}

.progress-ring-fill {
  fill: none;
  stroke: url(#progress-gradient);
  stroke-width: clamp(5px, 1vw, 8px);
  stroke-linecap: round;
  stroke-dasharray: 251.2;
  stroke-dashoffset: 251.2;
  transition: stroke-dashoffset var(--transition-slow);
}

.progress-ring-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.progress-percent {
  display: block;
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-400), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.progress-label {
  font-size: clamp(0.625rem, 1.5vw, 0.75rem);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

/* Collapsed sidebar adaptive */
.sidebar.collapsed .sidebar-progress {
  padding: var(--space-3) var(--space-2);
}

.sidebar.collapsed .progress-ring-wrapper {
  width: 48px;
  height: 48px;
}

.sidebar.collapsed .progress-ring-bg,
.sidebar.collapsed .progress-ring-fill {
  stroke-width: 4;
}

.sidebar.collapsed .progress-ring-text {
  display: none;
}

/* Tablet adaptive for sidebar */
@media (max-width: 1200px) {
  .sidebar-progress {
    padding: var(--space-4) var(--space-4);
  }
  
  .progress-ring-wrapper {
    width: 90px;
    height: 90px;
  }
  
  .progress-percent {
    font-size: 1.375rem;
  }
}

/* Small height screens */
@media (max-height: 800px) {
  .sidebar-progress {
    padding: var(--space-4) var(--space-4);
  }
  
  .progress-ring-wrapper {
    width: 80px;
    height: 80px;
  }
  
  .progress-percent {
    font-size: 1.25rem;
  }
  
  .progress-label {
    font-size: 0.625rem;
  }
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  margin-bottom: var(--space-1);
}

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

.nav-item.active {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.15), rgba(139, 92, 246, 0.15));
  color: var(--primary-400);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

.nav-icon {
  font-size: 1.25rem;
  width: 24px;
  text-align: center;
}

.nav-text {
  font-size: 0.9375rem;
  font-weight: 500;
}

.sidebar.collapsed .nav-item {
  justify-content: center;
  padding: var(--space-3);
}

.sidebar.collapsed .nav-icon {
  font-size: 1.5rem;
}

/* Quick Actions */
.sidebar-actions {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-color);
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: none;
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.action-btn.primary {
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  color: white;
  box-shadow: var(--shadow-glow);
}

.action-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(14, 165, 233, 0.5);
}

.action-btn:active {
  transform: translateY(0);
}

.sidebar.collapsed .sidebar-actions {
  padding: var(--space-4);
}

.sidebar.collapsed .action-btn {
  padding: var(--space-3);
}

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-color);
}

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

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  border: 2px solid var(--border-color);
}

.user-info {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.user-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar.collapsed .sidebar-footer {
  padding: var(--space-4);
}

.sidebar.collapsed .user-avatar {
  width: 48px;
  height: 48px;
}

/* ========== MOBILE HEADER ========== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  z-index: 90;
  align-items: center;
  padding: 0 var(--space-4);
  gap: var(--space-4);
}

.mobile-menu-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-md);
}

.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-muted);
  border-radius: var(--radius-full);
}

.mobile-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
}

.mobile-logo .logo-icon {
  font-size: 1.25rem;
  width: 32px;
  height: 32px;
}

.mobile-logo .logo-text {
  font-size: 1rem;
}

.mobile-stats {
  display: flex;
  gap: var(--space-3);
}

.mobile-stat {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ========== MAIN CONTENT ========== */
.main-content {
  margin-left: var(--sidebar-width);
  padding: var(--space-6);
  min-height: 100vh;
  transition: margin-left var(--transition-base);
}

.sidebar.collapsed + .main-content,
body.sidebar-collapsed .main-content {
  margin-left: var(--sidebar-collapsed);
}

.sidebar.collapsed ~ .site-footer {
  margin-left: var(--sidebar-collapsed);
}

body.sidebar-collapsed .site-footer {
  margin-left: 0;
}

/* ========== CARDS ========== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-xl);
}

.card + .card {
  margin-top: var(--space-6);
}

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

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.card-subtitle {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* ========== TAGS & BADGES ========== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: rgba(14, 165, 233, 0.1);
  color: var(--primary-400);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge-level {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-topic {
  background: rgba(139, 92, 246, 0.1);
  color: var(--accent-purple);
  border: 1px solid rgba(139, 92, 246, 0.2);
}

.badge-new {
  background: rgba(249, 115, 22, 0.1);
  color: var(--accent-orange);
  border: 1px solid rgba(249, 115, 22, 0.2);
}

.badge-completed {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ========== BUTTONS ========== */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.button-primary {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: white;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.4);
}

.button-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
}

.button-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.button-secondary:hover:not(:disabled) {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.button-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.button-ghost:hover:not(:disabled) {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.button-success {
  background: linear-gradient(135deg, var(--accent-green), #059669);
  color: white;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

.button-success:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.button-icon {
  padding: var(--space-2);
  width: 40px;
  height: 40px;
}

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

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

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

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

/* Мобильные сетки */
@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========== MODULE CARDS ========== */
.module-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.module-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-purple));
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.module-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-hover);
}

.module-card:hover::before {
  transform: scaleX(1);
}

.module-card.completed {
  border-color: rgba(16, 185, 129, 0.3);
}

.module-card.completed::before {
  background: var(--accent-green);
  transform: scaleX(1);
}

.module-card-locked {
  opacity: 0.6;
  cursor: not-allowed;
}

.module-card-locked:hover {
  transform: none;
}

.module-status {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.module-status.completed {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-green);
}

.module-status.locked {
  background: var(--bg-tertiary);
  color: var(--text-muted);
}

.module-status.in-progress {
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary-400);
}

.module-header {
  margin-bottom: var(--space-4);
}

.module-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

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

.module-description {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.module-progress {
  margin-bottom: var(--space-4);
}

.module-progress-bar {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.module-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-purple));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.module-progress-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.module-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 0.75rem;
  border-radius: var(--radius-full);
}

/* ========== PROGRESS BARS ========== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-purple));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

/* ========== STATS CARDS ========== */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  text-align: center;
  transition: all var(--transition-fast);
}

.stat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.stat-card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-3);
}

.stat-card-value {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-primary), var(--primary-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-1);
}

.stat-card-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ========== ACHIEVEMENT BADGES ========== */
.achievement-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
}

.achievement-badge:hover {
  border-color: var(--border-hover);
}

.achievement-badge.unlocked {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(14, 165, 233, 0.1));
  border-color: rgba(139, 92, 246, 0.3);
}

.achievement-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--space-3);
}

.achievement-badge.unlocked .achievement-icon {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(14, 165, 233, 0.2));
  box-shadow: var(--shadow-glow-purple);
}

.achievement-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: var(--space-1);
}

.achievement-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

.achievement-badge.locked {
  opacity: 0.5;
}

.achievement-badge.locked .achievement-icon {
  filter: grayscale(100%);
}

/* ========== TOAST NOTIFICATIONS ========== */
.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 4.7s;
  max-width: 400px;
}

.toast-icon {
  font-size: 1.5rem;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.toast-message {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.toast-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  padding: var(--space-1);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

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

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

/* ========== CONFETTI ========== */
.confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

/* ========== SLIDE CONTENT ========== */
.slide-container {
  max-width: 800px;
  margin: 0 auto;
}

/* Slide Navigation - Top & Bottom */
.slide-nav-top,
.slide-nav-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.slide-nav-bottom {
  margin-top: var(--space-6);
  margin-bottom: 0;
}

.slide-nav-btn {
  min-height: 44px;
  padding: var(--space-3) var(--space-4);
}

.slide-nav-btn:disabled,
.slide-nav-disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.slide-position {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.slide-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-color);
}

.slide-progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
  margin: 0 var(--space-4);
}

.slide-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.slide-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-purple));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.slide-progress-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.markdown-content {
  line-height: 1.8;
  font-size: 1rem;
}

.markdown-content h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-8) 0 var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--border-color);
}

.markdown-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-400);
  margin: var(--space-6) 0 var(--space-3);
}

.markdown-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--space-5) 0 var(--space-2);
}

.markdown-content p {
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
}

.markdown-content ul,
.markdown-content ol {
  margin: var(--space-4) 0;
  padding-left: var(--space-6);
}

.markdown-content li {
  margin: var(--space-2) 0;
  color: var(--text-secondary);
}

.markdown-content strong {
  color: var(--primary-400);
  font-weight: 600;
}

.markdown-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-tertiary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  color: var(--primary-400);
}

.code-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin: var(--space-4) 0;
  overflow-x: auto;
}

.code-block pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.markdown-content blockquote {
  border-left: 4px solid var(--primary-500);
  padding-left: var(--space-4);
  margin: var(--space-4) 0;
  color: var(--text-muted);
  font-style: italic;
}

/* Table wrapper for horizontal scroll on mobile */
.table-wrapper {
  overflow-x: auto;
  margin: var(--space-4) 0;
  -webkit-overflow-scrolling: touch;
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
}

.markdown-content th,
.markdown-content td {
  padding: var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

/* Responsive images */
.markdown-content img,
.slide-content-card img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.markdown-content th {
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.markdown-content tr:hover td {
  background: var(--bg-secondary);
}

/* ========== NAVIGATION ========== */
.module-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-color);
}

/* ========== TEST STYLES ========== */
.test-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  transition: all var(--transition-fast);
}

.test-list-item:hover {
  border-color: var(--border-hover);
}

.test-list-item-success {
  border-color: var(--accent-green);
  background: rgba(16, 185, 129, 0.05);
}

.tests-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.tests-list .test-list-item {
  margin-bottom: 0;
}

.test-info {
  flex: 1;
}

.test-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.test-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.question-block {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}

.question-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.options {
  list-style: none;
}

.options li {
  margin-bottom: var(--space-3);
}

.options label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.options label:hover {
  border-color: var(--primary-500);
  background: rgba(14, 165, 233, 0.05);
}

.options input[type="radio"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary-500);
}

.options li.correct-answer {
  border-color: var(--accent-green);
  background: rgba(16, 185, 129, 0.1);
}

.options li.wrong-answer {
  border-color: var(--accent-red);
  background: rgba(239, 68, 68, 0.1);
}

.result-banner {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
}

.result-ok {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.result-bad {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ========== SPACED REPETITION ========== */
.spaced-repetition-card {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(14, 165, 233, 0.1));
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin: var(--space-4) 0;
}

.spaced-repetition-controls {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.spaced-repetition-button {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: none;
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.spaced-repetition-button.easy {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-green);
}

.spaced-repetition-button.good {
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary-400);
}

.spaced-repetition-button.hard {
  background: rgba(239, 68, 68, 0.2);
  color: var(--accent-red);
}

.spaced-repetition-button:hover {
  transform: translateY(-2px);
}

.spaced-repetition-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.spaced-repetition-icon {
  font-size: 1.5rem;
}

.spaced-repetition-title {
  font-weight: 600;
}

/* ========== ROADMAP ========== */
.roadmap {
  position: relative;
  padding: var(--space-4) 0;
}

.roadmap::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--bg-tertiary);
}

.roadmap-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  position: relative;
}

.roadmap-marker {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  border: 3px solid var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  z-index: 1;
  flex-shrink: 0;
}

.roadmap-item.completed .roadmap-marker {
  background: var(--accent-green);
  border-color: rgba(16, 185, 129, 0.3);
}

.roadmap-item.current .roadmap-marker {
  background: var(--primary-500);
  border-color: rgba(14, 165, 233, 0.3);
  box-shadow: var(--shadow-glow);
  animation: pulse 2s infinite;
}

.roadmap-item.locked .roadmap-marker {
  background: var(--bg-tertiary);
  opacity: 0.5;
}

.roadmap-content {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
}

.roadmap-item.completed .roadmap-content {
  border-color: rgba(16, 185, 129, 0.2);
}

.roadmap-item.current .roadmap-content {
  border-color: rgba(14, 165, 233, 0.3);
  box-shadow: var(--shadow-glow);
}

/* Roadmap Item Internal Components */
.roadmap-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-2);
}

.roadmap-item-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

.roadmap-item-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1.125rem;
}

.roadmap-item-badges {
  display: flex;
  gap: var(--space-2);
}

.roadmap-item-description {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-3);
}

.roadmap-item-topics {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}

.roadmap-item-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.roadmap-item-footer.full-width {
  width: 100%;
}

.roadmap-item-tests {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.roadmap-item-button {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
}

.roadmap-item-button.full {
  width: 100%;
}

/* Module Detail Header */
.module-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

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

.module-detail-title {
  font-size: 2rem;
  margin-bottom: var(--space-2);
}

.module-detail-subtitle {
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

/* Content Tabs */
.content-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--space-4);
}

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

/* Topics List */
.topics-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.topic-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.topic-number {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--primary-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  flex-shrink: 0;
}

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

/* Skills Grid */
.skills-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.skill-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.skill-card-icon {
  font-size: 1.5rem;
}

.skill-card-text {
  color: var(--text-secondary);
}

/* Section Headers */
.section-title {
  margin-bottom: var(--space-3);
}

.section-title-lg {
  margin-bottom: var(--space-4);
}

.section-title-xl {
  margin-bottom: var(--space-4);
}

/* Text Helpers */
.text-muted-small {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Module Detail Actions */
.module-detail-actions {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-8);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.empty-state-text {
  color: var(--text-muted);
}

.empty-state.full-width {
  width: 100%;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.4);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(14, 165, 233, 0);
  }
}

/* Home Page Components */
.home-grid {
  margin-bottom: var(--space-6);
}

/* Home Blocks - Vertical Layout with Margins */
.home-blocks-vertical {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.home-block {
  margin: var(--space-4);
}

.home-welcome-card .card-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.home-buttons {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.skill-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.skill-icon {
  font-size: 1.25rem;
}

.skill-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.home-progress-card .progress-text {
  color: var(--text-secondary);
  margin: var(--space-3) 0 var(--space-4);
}

.achievements-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.achievement-preview-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.achievement-preview-icon {
  font-size: 2rem;
  opacity: 0.5;
  filter: grayscale(100%);
}

.achievement-preview-info {
  flex: 1;
}

.achievement-preview-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.achievement-preview-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

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

.achievement-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}

.achievement-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-purple));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.achievement-progress-text {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.achievement-preview-xp {
  text-align: center;
  padding: var(--space-2);
}

.xp-value {
  font-size: 0.75rem;
  color: var(--accent-yellow);
  font-weight: 600;
}

.xp-label {
  font-size: 0.625rem;
  color: var(--text-muted);
}

.badges-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.unlocked-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(14, 165, 233, 0.1));
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-full);
}

.view-all-achievements {
  margin-top: var(--space-4);
}

.modules-summary {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.modules-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.module-preview-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid var(--border-color);
}

.module-preview-item:hover {
  border-color: var(--border-hover);
}

.module-preview-item.in-progress {
  border-color: var(--primary-500);
}

.module-preview-status {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.module-preview-item.completed .module-preview-status {
  background: var(--accent-green);
}

.module-preview-item.in-progress .module-preview-status {
  background: var(--primary-500);
}

.module-preview-item.locked .module-preview-status {
  background: var(--bg-tertiary);
}

.module-preview-info {
  flex: 1;
}

.module-preview-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.module-preview-meta {
  display: flex;
  gap: var(--space-2);
}

.module-preview-indicator {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--primary-500);
  animation: pulse 2s infinite;
}

.view-all-modules {
  width: 100%;
  margin-top: var(--space-4);
}

@media (max-width: 768px) {
  .home-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .home-buttons {
    flex-direction: column;
  }
  
  .home-buttons .button {
    width: 100%;
  }
}

/* ========== DASHBOARD ========== */
.dashboard-header {
  margin-bottom: var(--space-8);
}

.dashboard-welcome {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.dashboard-welcome span {
  background: linear-gradient(135deg, var(--primary-400), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.dashboard-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.quick-stat {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
}

.quick-stat:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.quick-stat-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  background: var(--bg-tertiary);
}

.quick-stat-info {
  flex: 1;
}

.quick-stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.quick-stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Safe Area для iPhone X+ */
@supports (padding-top: env(safe-area-inset-top)) {
  .mobile-header {
    padding-top: env(safe-area-inset-top);
    height: calc(var(--header-height) + env(safe-area-inset-top));
  }
  
  .main-content {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }
  
  .sidebar {
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
  }
  
  .toast-container {
    top: calc(var(--space-6) + env(safe-area-inset-top));
  }
  
  .focus-toggle {
    bottom: calc(var(--space-6) + env(safe-area-inset-bottom));
  }
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
  }
  
  /* На мобильных .open всегда важнее .collapsed */
  .sidebar.open {
    transform: translateX(0);
  }
  
  /* На десктопе работает collapse */
  .sidebar.collapsed {
    width: var(--sidebar-collapsed);
  }
  
  .mobile-header {
    display: flex;
  }
  
  .main-content {
    margin-left: 0 !important;
    padding: calc(var(--header-height) + var(--space-4)) var(--space-4) var(--space-4) !important;
  }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .quick-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --space-4: 0.875rem;
    --space-5: 1rem;
    --space-6: 1.25rem;
  }
  
  .grid-2,
  .grid-3,
  .grid-4,
  [class*="grid-"] {
    grid-template-columns: 1fr !important;
  }
  
  /* Admin Panel - Mobile */
  .admin-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  
  .admin-tab {
    white-space: nowrap;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .admin-module-card,
  .admin-test-card,
  .admin-item-card {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  
  .module-actions,
  .test-actions,
  .admin-actions {
    width: 100%;
    justify-content: flex-end;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  
  .section-header .button {
    width: 100%;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .form-actions .button {
    width: 100%;
  }
  
  .question-type {
    flex-direction: column;
    gap: var(--space-2);
  }
  
  .option-row {
    flex-wrap: wrap;
  }
  
  .option-correct {
    order: -1;
  }
  
  .main-content {
    padding: calc(var(--header-height) + var(--space-3)) var(--space-3) var(--space-3) !important;
    margin-left: 0 !important;
  }
  
  .card {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
  }
  
  .card-title {
    font-size: 1.125rem;
  }
  
  .card-subtitle {
    font-size: 0.875rem;
  }
  
  .dashboard-header {
    margin-bottom: var(--space-5);
  }
  
  .dashboard-welcome {
    font-size: 1.375rem;
  }
  
  .dashboard-subtitle {
    font-size: 1rem;
  }
  
  .quick-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-5);
  }
  
  .quick-stat {
    padding: var(--space-4);
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }
  
  .quick-stat-icon {
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
  }
  
  .quick-stat-value {
    font-size: 1.5rem;
  }
  
  .quick-stat-label {
    font-size: 0.75rem;
  }
  
  .stat-card {
    padding: var(--space-4);
  }
  
  .stat-card-icon {
    font-size: 1.5rem;
  }
  
  .stat-card-value {
    font-size: 1.75rem;
  }
  
  .stat-card-label {
    font-size: 0.75rem;
  }
  
  .module-card {
    padding: var(--space-4);
  }
  
  .module-title {
    font-size: 1rem;
  }
  
  .module-description {
    font-size: 0.875rem;
  }
  
  .roadmap-item {
    gap: var(--space-3);
    padding: var(--space-3) 0;
  }
  
  .roadmap-marker {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .roadmap-content {
    padding: var(--space-3);
  }
  
  .achievement-badge {
    padding: var(--space-4);
  }
  
  .achievement-icon {
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
  }
  
  .button {
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    min-height: 44px;
  }
  
  .button-icon {
    width: 36px;
    height: 36px;
    padding: var(--space-1);
  }
  
  .spaced-repetition-controls {
    flex-direction: column;
  }
  
  .spaced-repetition-button {
    padding: var(--space-3);
    min-height: 44px;
  }
  
  .module-navigation {
    flex-direction: column;
    gap: var(--space-3);
  }
  
  .module-navigation .button {
    width: 100%;
    min-height: 48px;
  }
  
  .slide-container {
    padding: 0 var(--space-2);
  }
  
  .slide-nav-top,
  .slide-nav-bottom {
    flex-direction: column;
    gap: var(--space-2);
  }
  
  .slide-nav-btn {
    width: 100%;
    justify-content: center;
  }
  
  .slide-position {
    order: -1;
    text-align: center;
    width: 100%;
    margin-bottom: var(--space-2);
  }
  
  .slide-header {
    flex-wrap: wrap;
    gap: var(--space-3);
  }
  
  .slide-progress {
    order: 3;
    width: 100%;
    margin: 0;
  }
  
  /* Mobile table styles */
  .markdown-content table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  
  .markdown-content th,
  .markdown-content td {
    padding: var(--space-2);
    font-size: 0.875rem;
  }
  
  .test-list-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
  }
  
  .test-list-item .button {
    width: 100%;
    min-height: 44px;
  }
  
  .question-block {
    padding: var(--space-4);
  }
  
  .options label {
    padding: var(--space-3);
    min-height: 44px;
  }
  
  .auth-container {
    padding: var(--space-6) var(--space-4);
  }
  
  .auth-logo {
    font-size: 3rem;
  }
  
  .auth-title {
    font-size: 1.5rem;
  }
  
  .toast-container {
    left: var(--space-3);
    right: var(--space-3);
    top: calc(var(--header-height) + var(--space-3));
  }
  
  .toast {
    max-width: 100%;
    padding: var(--space-3);
  }
  
  .mobile-stats {
    gap: var(--space-2);
  }
  
  .mobile-stat {
    font-size: 0.75rem;
  }
  
  .markdown-content {
    font-size: 0.9375rem;
  }
  
  .markdown-content h1 {
    font-size: 1.5rem;
  }
  
  .markdown-content h2 {
    font-size: 1.25rem;
  }
  
  .markdown-content h3 {
    font-size: 1.125rem;
  }
  
  .focus-toggle {
    width: 48px;
    height: 48px;
    bottom: var(--space-4);
    right: var(--space-4);
  }
  
  /* Modals - Mobile */
  .modal-body .form-row {
    grid-template-columns: 1fr;
  }
  
  .modal-content {
    width: 95%;
    max-height: 95vh;
  }
  
  .modal-content.modal-large {
    max-width: 95%;
  }
}

@media (max-width: 480px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .quick-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  /* Admin Panel - Small Mobile */
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .admin-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  
  .admin-user {
    align-items: flex-start;
  }
  
  .dashboard-welcome {
    font-size: 1.25rem;
  }
  
  .dashboard-subtitle {
    font-size: 0.875rem;
  }
  
  .mobile-logo .logo-text {
    display: none;
  }
  
  .module-meta {
    flex-wrap: wrap;
  }
  
  .badge {
    font-size: 0.625rem;
    padding: 2px 6px;
  }
  
  .chip {
    font-size: 0.625rem;
  }
  
  .achievement-badge {
    padding: var(--space-3);
  }
  
  .achievement-name {
    font-size: 0.875rem;
  }
  
  .achievement-desc {
    font-size: 0.6875rem;
  }
}

@media (max-width: 360px) {
  .quick-stats {
    grid-template-columns: 1fr;
  }
  
  .mobile-stats {
    display: none;
  }
}

/* ========== SIDEBAR OVERLAY ========== */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

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

/* ========== UTILITY CLASSES ========== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }

/* ========== LOADING STATES ========== */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ========== FOCUS MODE ========== */
.focus-mode .sidebar,
.focus-mode .mobile-header,
.focus-mode .site-footer {
  display: none;
}

.focus-mode .main-content {
  margin-left: 0;
  padding-top: var(--space-6);
}

.focus-toggle {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 50;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: all var(--transition-fast);
}

.focus-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 0 30px rgba(14, 165, 233, 0.5);
}

/* ========== SITE FOOTER ========== */
.site-footer {
  margin-left: var(--sidebar-width);
  padding: var(--space-6);
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  transition: margin-left var(--transition-base);
}

.sidebar.collapsed ~ .site-footer {
  margin-left: var(--sidebar-collapsed);
}

@media (max-width: 1024px) {
  .site-footer {
    margin-left: 0;
  }
}

/* ========== AUTH FORM ========== */
.auth-container {
  max-width: 420px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
}

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

.auth-logo {
  font-size: 4rem;
  margin-bottom: var(--space-4);
}

.auth-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.auth-subtitle {
  color: var(--text-muted);
}

.auth-providers {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.auth-provider-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-provider-btn:hover {
  border-color: var(--border-hover);
  background: var(--bg-secondary);
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-6) 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

/* SVG Gradient Definition (add to HTML if needed) */
/*
<svg width="0" height="0" style="position: absolute;">
  <defs>
    <linearGradient id="progress-gradient" x1="0%" y1="0%" x2="100%" y2="0%">
      <stop offset="0%" stop-color="#0ea5e9" />
      <stop offset="100%" stop-color="#8b5cf6" />
    </linearGradient>
  </defs>
</svg>
*/

/* ========== ADMIN PANEL ========== */
.admin-panel {
  max-width: 1200px;
  margin: 0 auto;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-color);
}

.admin-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
}

.admin-user {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-1);
}

.admin-role {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.admin-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--space-4);
  flex-wrap: wrap;
}

.admin-tab {
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.admin-tab.active {
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

.admin-content {
  min-height: 400px;
}

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

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  text-align: center;
  transition: all var(--transition-fast);
}

.stat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.stat-icon {
  font-size: 2rem;
  margin-bottom: var(--space-2);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.dashboard-sections {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.dashboard-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
}

.dashboard-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.quick-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.quick-actions .button {
  width: 100%;
  justify-content: flex-start;
}

.recent-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.recent-action {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.action-type {
  font-size: 0.875rem;
}

.action-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Admin Section */
.admin-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
}

.section-header h2 {
  font-size: 1.375rem;
  font-weight: 600;
}

/* Admin Cards */
.admin-module-card,
.admin-test-card,
.admin-item-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  transition: all var(--transition-fast);
}

.admin-module-card:hover,
.admin-test-card:hover,
.admin-item-card:hover {
  border-color: var(--border-hover);
}

.module-info,
.test-info,
.admin-info {
  flex: 1;
}

.module-order {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--primary-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.module-details h4,
.test-info h4,
.admin-email {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.module-meta,
.admin-meta {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.module-actions,
.test-actions,
.admin-actions {
  display: flex;
  gap: var(--space-2);
}

/* Materials */
.materials-filter {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.materials-filter label {
  color: var(--text-muted);
}

.form-select {
  padding: var(--space-2) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 0.9375rem;
  min-width: 200px;
}

.materials-group {
  margin-bottom: var(--space-4);
}

.materials-group-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-color);
}

.material-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-2);
}

.material-number {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
}

.material-title {
  flex: 1;
  color: var(--text-secondary);
}

.material-actions {
  display: flex;
  gap: var(--space-2);
}

/* Logs */
.logs-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.log-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

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

.log-action {
  font-size: 0.875rem;
  color: var(--text-primary);
}

.log-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.log-admin {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Button Icons */
.btn-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--bg-primary);
  border-color: var(--border-hover);
}

.btn-icon.btn-danger:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--accent-red);
}

/* Badges */
.badge-superadmin {
  background: rgba(139, 92, 246, 0.2);
  color: var(--accent-purple);
}

.badge-admin {
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary-400);
}

.badge-editor {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-green);
}

/* Form Elements */
.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-color);
}

/* Markdown Editor */
.markdown-editor {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.markdown-editor-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
}

.toolbar-group {
  display: flex;
  gap: var(--space-1);
}

.toolbar-group-right {
  margin-left: auto;
}

.toolbar-btn {
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

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

.toolbar-btn.active {
  background: var(--primary-500);
  color: white;
  border-color: var(--primary-500);
}

.toolbar-btn-primary {
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  color: white;
  border-color: transparent;
}

.markdown-editor-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 400px;
}

.markdown-editor-container.preview-only .editor-pane {
  display: none;
}

.markdown-editor-container.preview-only {
  grid-template-columns: 1fr;
}

.editor-pane,
.preview-pane {
  overflow: auto;
}

.editor-pane {
  border-right: 1px solid var(--border-color);
}

.markdown-textarea {
  width: 100%;
  height: 100%;
  min-height: 400px;
  padding: var(--space-4);
  background: var(--bg-primary);
  border: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  resize: none;
  outline: none;
}

.preview-content {
  padding: var(--space-4);
  height: 100%;
}

.markdown-editor-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.editor-status {
  transition: color var(--transition-fast);
}

.editor-status.saving {
  color: var(--primary-400);
}

.editor-status.error {
  color: var(--accent-red);
}

/* Test Builder */
.test-builder {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.test-builder-header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-color);
}

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

.form-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.questions-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.question-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.question-number {
  font-weight: 600;
  color: var(--text-primary);
}

.question-type {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

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

.option-correct {
  width: 20px;
  height: 20px;
  accent-color: var(--primary-500);
}

.option-text {
  flex: 1;
}

.btn-add-option {
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.btn-add-option:hover {
  border-color: var(--primary-500);
  color: var(--primary-400);
}

.btn-remove-option {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  border-radius: var(--radius-md);
}

.btn-remove-option:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
}

/* Text helpers */
.text-error {
  color: var(--accent-red);
}

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

/* ========== ADMIN MODALS ========== */
.admin-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.admin-modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateY(20px);
  transition: transform var(--transition-fast);
}

.admin-modal.active .modal-content {
  transform: translateY(0);
}

.modal-content.modal-large {
  max-width: 900px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.btn-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: var(--space-5);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-color);
}

/* Form Elements in Modals */
.modal-body .form-group {
  margin-bottom: var(--space-4);
}

.modal-body .form-group label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.modal-body .form-input,
.modal-body .form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
}

.modal-body .form-input:focus,
.modal-body .form-select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.modal-body textarea.form-input {
  resize: vertical;
  min-height: 80px;
}

.modal-body .form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

/* ========== USERS TAB ========== */
.users-search {
  display: flex;
  gap: var(--space-2);
}

.users-search .form-input {
  min-width: 250px;
}

.users-list {
  margin-bottom: var(--space-4);
}

.users-table-container {
  overflow-x: auto;
}

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

.users-table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.users-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-color);
}

.user-row {
  transition: background var(--transition-fast);
}

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

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

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-500), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
  font-size: 1rem;
}

.user-details {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-weight: 600;
  color: var(--text-primary);
}

.user-email {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.user-progress-cell {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.user-progress-cell .progress-bar {
  flex: 1;
  height: 6px;
}

.progress-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  min-width: 40px;
}

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

.user-stats small {
  color: var(--text-muted);
}

.last-login {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.user-actions {
  display: flex;
  gap: var(--space-2);
}

.users-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-color);
}

.page-info {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* User Detail */
.user-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.user-detail-grid .dashboard-card {
  margin: 0;
}

.user-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border-color);
}

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

.info-label {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.info-value {
  color: var(--text-primary);
  font-weight: 500;
}

.modules-progress-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.module-progress-item {
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.module-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.module-title {
  font-weight: 500;
  color: var(--text-primary);
}

.progress-percent {
  font-weight: 600;
  color: var(--primary-400);
}

.module-progress-stats {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-2);
}

.module-progress-stats small {
  color: var(--text-muted);
}

.progress-fill.completed {
  background: var(--accent-green);
}

.current-position {
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.position-module {
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

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

.position-progress .progress-bar {
  flex: 1;
}

.test-history-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.test-history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

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

.test-info strong {
  color: var(--text-primary);
  font-weight: 500;
}

.test-info small {
  color: var(--text-muted);
}

.test-result {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-1);
}

.user-detail-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-color);
}

/* Badge colors */
.badge-success {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-green);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.2);
  color: var(--accent-red);
}

.badge-info {
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary-400);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent-yellow);
}

/* Mobile responsive for users */
@media (max-width: 1024px) {
  .user-detail-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .users-search {
    width: 100%;
  }
  
  .users-search .form-input {
    flex: 1;
    min-width: 0;
  }
  
  .users-table {
    font-size: 0.875rem;
  }
  
  .users-table th,
  .users-table td {
    padding: var(--space-2);
  }
  
  .user-avatar {
    width: 32px;
    height: 32px;
    font-size: 0.875rem;
  }
  
  .user-details {
    max-width: 120px;
  }
  
  .user-name,
  .user-email {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  
  .user-detail-actions {
    flex-direction: column;
  }
  
  .user-detail-actions .button {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .users-table th:nth-child(3),
  .users-table td:nth-child(3) {
    display: none;
  }
}