/* ============================================
   Modern Enterprise Dashboard CSS
   ============================================ */

:root {
  /* Brand Colors */
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #93c5fd;
  --secondary: #6366f1;
  --secondary-dark: #4f46e5;
  --accent: #8b5cf6;
  
  /* Status Colors */
  --success: #10b981;
  --success-light: #34d399;
  --warning: #f59e0b;
  --warning-light: #fbbf24;
  --danger: #ef4444;
  --danger-light: #f87171;
  --info: #06b6d4;
  --info-light: #22d3ee;
  
  /* Neutral Colors */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Theme Variables */
  --background: #ffffff;
  --surface: #ffffff;
  --surface-hover: #f8fafc;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  
  /* Sidebar */
  --sidebar-bg: #1e293b;
  --sidebar-border: #334155;
  --sidebar-text: #cbd5e1;
  --sidebar-text-active: #ffffff;
  --sidebar-nav-hover: #334155;
  --sidebar-nav-active: var(--primary);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Transitions */
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Sidebar Width */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 80px;
}

/* Dark Theme */
[data-theme="dark"] {
  --background: #0f172a;
  --surface: #1e293b;
  --surface-hover: #334155;
  --border: #334155;
  --border-light: #475569;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  --sidebar-bg: #020617;
  --sidebar-border: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;
  --sidebar-nav-hover: #1e293b;
  
  --gray-50: #1e293b;
  --gray-100: #334155;
  --gray-200: #475569;
}

/* ============================================
   Base Styles
   ============================================ */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  transition: var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Layout Components
   ============================================ */

.dashboard-container {
  display: flex;
  min-height: 100vh;
  background: var(--background);
}

/* ============================================
   Sidebar Styles
   ============================================ */

.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 1000;
  transition: var(--transition);
}

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

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing);
  color: var(--sidebar-text-active);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo i {
  font-size: 1.5rem;
  color: var(--primary);
}

.sidebar.collapsed .logo span {
  display: none;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--sidebar-text);
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius);
  transition: var(--transition);
}

.sidebar-toggle:hover {
  background: var(--sidebar-nav-hover);
  color: var(--sidebar-text-active);
}
.sidebar-close-btn {
   display: none;
   background: none;
   border: none;
   color: var(--sidebar-text);
   font-size: 1.5rem;
   cursor: pointer;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-lg) 0;
}

.nav-list {
  list-style: none;
}

.nav-item {
  margin-bottom: var(--spacing-xs);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing);
  padding: var(--spacing) var(--spacing-lg);
  color: var(--sidebar-text);
  text-decoration: none;
  transition: var(--transition);
  border-radius: 0;
  position: relative;
}

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

.nav-link.active {
  background: var(--sidebar-nav-active);
  color: var(--text-inverse);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--primary-light);
}

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

.sidebar.collapsed .nav-link span {
  display: none;
}

.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--sidebar-border);
}

.theme-switch {
  margin-bottom: var(--spacing);
  display: flex;
  justify-content: center;
}

.logout-btn {
  width: 100%;
  background: none;
  border: 1px solid var(--sidebar-border);
  color: var(--sidebar-text);
  padding: var(--spacing) var(--spacing-lg);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: var(--spacing);
  justify-content: center;
}

.logout-btn:hover {
  background: var(--danger);
  border-color: var(--danger);
  color: var(--text-inverse);
}

.sidebar.collapsed .logout-btn span {
  display: none;
}

.sidebar.collapsed .theme-switch {
  display: none;
}

.sidebar.collapsed .logout-btn {
  width: auto;
  padding: var(--spacing);
}

/* ============================================
   Main Content Styles
   ============================================ */

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  background: var(--background);
  transition: var(--transition);
}

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

.top-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-left {
   display: flex;
   align-items: center;
   gap: var(--spacing);
}
.mobile-menu-btn {
   display: none;
   background: none;
   border: none;
   color: var(--text-primary);
   font-size: 1.5rem;
   cursor: pointer;
}

.header-left h1 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

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

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

.user-avatar {
  width: 48px;
  height: 48px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  font-size: 1.25rem;
}

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

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

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

.content-wrapper {
  padding: var(--spacing-xl);
}

/* ============================================
   Content Sections
   ============================================ */

.content-section {
  display: none;
}

.content-section.active {
  display: block;
}

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

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

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

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

/* ============================================
   Card Components
   ============================================ */

.overview-card,
.record-card,
.profile-card,
.leaderboard-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}

.overview-card:hover,
.record-card:hover,
.profile-card:hover,
.leaderboard-card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface-hover);
}

.card-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing);
}

.card-header h3 i {
  color: var(--primary);
}

.card-content {
  padding: var(--spacing-lg);
}

.card-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.view-all-link {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}

.view-all-link:hover {
  color: var(--primary-dark);
}

/* ============================================
   Stats Grid
   ============================================ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing);
  transition: var(--transition);
}

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

.stat-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  font-size: 1.5rem;
}

.stat-content {
  flex: 1;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

.overview-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-lg);
}

/* ============================================
   Button Components
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing) var(--spacing-lg);
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--primary);
  color: var(--text-inverse);
  border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-success {
  background: var(--success);
  color: var(--text-inverse);
  border-color: var(--success);
}

.btn-success:hover:not(:disabled) {
  background: var(--success-light);
  border-color: var(--success-light);
}

.btn-danger {
  background: var(--danger);
  color: var(--text-inverse);
  border-color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-light);
  border-color: var(--danger-light);
}

.btn-warning {
  background: var(--warning);
  color: var(--text-inverse);
  border-color: var(--warning);
}

.btn-warning:hover:not(:disabled) {
  background: var(--warning-light);
  border-color: var(--warning-light);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-outline:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-icon {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: var(--spacing-sm);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
}

.btn-icon:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing);
  font-size: 0.75rem;
}

/* ============================================
   Recording Interface
   ============================================ */

.record-container {
  max-width: 800px;
  margin: 0 auto;
}

.progress-tracker {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  position: relative;
}

.progress-step.active .step-number {
  background: var(--primary);
  color: var(--text-inverse);
}

.progress-step.completed .step-number {
  background: var(--success);
  color: var(--text-inverse);
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gray-200);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  transition: var(--transition);
}

.step-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.progress-line {
  width: 80px;
  height: 2px;
  background: var(--border);
  margin: 0 var(--spacing);
}

.recording-steps {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.step-container {
  display: none;
}

.step-container.active {
  display: block;
}

.text-display {
  background: var(--gray-50);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  font-size: 1.25rem;
  line-height: 1.7;
  text-align: center;
  min-height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.record-btn {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--danger);
  border: none;
  color: var(--text-inverse);
  font-size: 2rem;
  cursor: pointer;
  margin-bottom: var(--spacing);
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
}

.record-btn:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.record-btn.recording {
  animation: pulse-record 2s infinite;
}

@keyframes pulse-record {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
  70% { box-shadow: 0 0 0 20px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

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

.recording-status {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
}

.recording-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing);
  color: var(--danger);
  font-weight: 500;
}

.pulse-dot {
  width: 12px;
  height: 12px;
  background: var(--danger);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.recording-pulse {
  animation: pulse 1.5s infinite;
}

/* ============================================
   Waveform & Playback
   ============================================ */

.waveform-container {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.playback-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing);
}

.playback-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  color: var(--text-inverse);
  font-size: 1.25rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.playback-btn:hover {
  background: var(--primary-dark);
  transform: scale(1.05);
}

.time-info {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

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

.review-actions {
  display: flex;
  gap: var(--spacing);
  justify-content: center;
}

/* ============================================
   Success Animation
   ============================================ */

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

.success-animation {
  padding: var(--spacing-xl);
}

.success-icon {
  font-size: 4rem;
  color: var(--success);
  margin-bottom: var(--spacing-lg);
  animation: success-bounce 0.6s ease-out;
}

@keyframes success-bounce {
  0% { transform: scale(0); opacity: 0; }
  50% { transform: scale(1.1); opacity: 0.8; }
  100% { transform: scale(1); opacity: 1; }
}

.success-animation h3 {
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing);
}

.success-animation p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   Data Table
   ============================================ */

.data-table-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table-wrapper {
  overflow-x: auto;
}

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

.data-table th {
  background: var(--gray-50);
  padding: var(--spacing) var(--spacing-lg);
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.data-table td {
  padding: var(--spacing) var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.data-table tbody tr:hover {
  background: var(--surface-hover);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================
   Action Buttons (Table)
   ============================================ */

.action-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
  align-items: center;
  flex-wrap: nowrap;
}

.action-buttons .btn {
  min-width: 80px;
  white-space: nowrap;
}

.action-buttons .btn-sm {
  padding: var(--spacing-sm) var(--spacing);
  font-size: 0.8rem;
  min-width: 75px;
  width: 75px;
}

.check-recording-btn,
.delete-recording-btn {
  width: 95px !important;
  min-width: 75px;
  text-align: center;
  justify-content: center;
}

@media (max-width: 768px) {
   .data-table thead {
       display: none;
   }
   .data-table, .data-table tbody, .data-table tr, .data-table td {
       display: block;
       width: 100%;
   }
   .data-table tr {
       margin-bottom: 1rem;
       border: 1px solid var(--border);
       border-radius: var(--radius);
   }
   .data-table td {
       padding-left: 50%;
       position: relative;
       text-align: right;
   }
   .data-table td::before {
       content: attr(data-label);
       position: absolute;
       left: 0;
       width: 50%;
       padding-left: 1rem;
       font-weight: bold;
       text-align: left;
   }
 .action-buttons {
     display: flex;
     gap: var(--spacing-sm);
     justify-content: flex-end;
     align-items: center;
     flex-wrap: nowrap;
     margin-top: var(--spacing-xs);
 }
 
 .action-buttons .btn-sm {
     padding: var(--spacing-xs) var(--spacing-sm);
     font-size: 0.75rem;
     min-width: 70px;
     width: 70px;
     height: 32px;
 }
 
 .action-buttons .check-recording-btn,
 .action-buttons .delete-recording-btn {
     width: 70px !important;
     min-width: 70px;
 }
 
 .action-buttons .btn-sm i {
     font-size: 0.7rem;
     margin-right: 0.25rem;
 }
 
 /* Mobile table card layout - Actions cell styling */
 .data-table td[data-label="Actions"] {
     padding-top: var(--spacing-sm);
     padding-bottom: var(--spacing-sm);
     border-top: 1px solid var(--border-light);
 }
 
 .data-table td[data-label="Actions"]::before {
     font-weight: 600;
     color: var(--text-primary);
 }
}

/* ============================================
   Leaderboard
   ============================================ */

.leaderboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-lg);
}

.leaderboard-list {
  space-y: var(--spacing);
}

.leaderboard-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  transition: var(--transition);
}

.leaderboard-item:hover {
  background: var(--surface-hover);
  border-color: var(--border);
}

/* Removed golden background for top-3 leaderboard items */
.leaderboard-item.top-3 {
  border-color: var(--warning);
}

.leader-info {
  display: flex;
  align-items: center;
  gap: var(--spacing);
}

.leader-rank {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
}

.leader-name {
  font-weight: 500;
}

.leader-stats {
  text-align: right;
  font-size: 0.875rem;
}

.leaderboard-stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--spacing);
  padding: var(--spacing-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.stat-item .stat-icon {
  width: 48px;
  height: 48px;
  background: var(--primary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
}

.stat-info {
  flex: 1;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

/* ============================================
   Filter Tabs
   ============================================ */

.filter-tabs {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.filter-tab {
  background: var(--surface);
  border: none;
  padding: var(--spacing-sm) var(--spacing);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.875rem;
}

.filter-tab:hover {
  background: var(--surface-hover);
}

.filter-tab.active {
  background: var(--primary);
  color: var(--text-inverse);
}

.filter-tab:not(:last-child) {
  border-right: 1px solid var(--border);
}

/* ============================================
   Profile Styles
   ============================================ */

.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--spacing-lg);
}

.profile-avatar {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.avatar-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  margin: 0 auto var(--spacing);
}

.profile-form {
  space-y: var(--spacing);
}

.form-group {
  margin-bottom: var(--spacing);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.875rem;
}

.form-control {
  width: 100%;
  padding: var(--spacing) var(--spacing);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control:read-only {
  background: var(--gray-50);
  color: var(--text-secondary);
}

.stats-list {
  space-y: var(--spacing);
}

.stats-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing) 0;
  border-bottom: 1px solid var(--border-light);
}

.stats-item:last-child {
  border-bottom: none;
}

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

.stats-value {
  font-weight: 600;
  color: var(--text-primary);
}

.preferences-list {
  space-y: var(--spacing-lg);
}

.preference-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--border-light);
}

.preference-item:last-child {
  border-bottom: none;
}

.preference-info label {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.preference-info p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
}

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

.theme-toggle {
  display: inline-block;
  height: 34px;
  position: relative;
  width: 60px;
}

.theme-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--gray-300);
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--primary);
}

input:checked + .slider:before {
  transform: translateX(26px);
}

.slider .sun-icon,
.slider .moon-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  transition: .4s;
}

.slider .sun-icon {
  left: 8px;
  color: var(--warning);
  opacity: 1;
}

.slider .moon-icon {
  right: 8px;
  color: white;
  opacity: 0;
}

input:checked + .slider .sun-icon {
  opacity: 0;
}

input:checked + .slider .moon-icon {
  opacity: 1;
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 24px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--gray-300);
  transition: .4s;
  border-radius: 24px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .toggle-slider {
  background-color: var(--primary);
}

input:checked + .toggle-slider:before {
  transform: translateX(24px);
}

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

.alert {
  display: flex;
  align-items: center;
  gap: var(--spacing);
  padding: var(--spacing);
  border-radius: var(--radius);
  margin-bottom: var(--spacing);
  border-left: 4px solid;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-left-color: var(--warning);
  color: var(--warning);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-left-color: var(--success);
  color: var(--success);
}

.alert-danger {
  background: rgba(239, 68, 68, 0.1);
  border-left-color: var(--danger);
  color: var(--danger);
}

.alert-info {
  background: rgba(6, 182, 212, 0.1);
  border-left-color: var(--info);
  color: var(--info);
}

/* ============================================
   Toast Notifications
   ============================================ */

.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 1050;
  pointer-events: none;
}

.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing);
  margin-bottom: var(--spacing);
  display: flex;
  align-items: center;
  gap: var(--spacing);
  min-width: 320px;
  max-width: 400px;
  pointer-events: auto;
  transform: translateX(100%);
  opacity: 0;
  transition: var(--transition);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--danger);
}

.toast.info {
  border-left: 4px solid var(--info);
}

.toast.warning {
  border-left: 4px solid var(--warning);
}

.toast-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.toast.success .toast-icon {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.toast.error .toast-icon {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

.toast.info .toast-icon {
  background: rgba(6, 182, 212, 0.1);
  color: var(--info);
}

.toast.warning .toast-icon {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-xs);
}

.toast-message {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius);
  transition: var(--transition);
}

.toast-close:hover {
  background: var(--gray-100);
  color: var(--text-secondary);
}

/* ============================================
   Loading Overlay
   ============================================ */

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.loading-overlay.show {
  display: flex;
}

.loading-spinner {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-xl);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top: 4px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-spinner p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
  .overview-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .leaderboard-grid {
    grid-template-columns: 1fr;
  }
  
  .profile-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
   .sidebar {
       transform: translateX(-100%);
       width: var(--sidebar-width);
       z-index: 1100;
       transition: transform 0.3s ease-in-out;
     }
  
   .sidebar.open {
       transform: translateX(0);
       box-shadow: var(--shadow-xl);
   }
  
   .main-content {
       margin-left: 0;
   }
  
   .sidebar.collapsed + .main-content {
     margin-left: 0;
   }
   .mobile-menu-btn {
        display: block;
    }
    .sidebar-toggle {
        display: none;
    }
    .sidebar-close-btn {
        display: block;
    }
   
   .top-header {
    padding: var(--spacing) var(--spacing-lg);
  }
  
  .content-wrapper {
    padding: var(--spacing-lg);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing);
  }
  
  .overview-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing);
  }
  
  .profile-grid {
    grid-template-columns: 1fr;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing);
  }
  
  .progress-tracker {
    padding: var(--spacing);
  }
  
  .progress-step {
    font-size: 0.75rem;
  }
  
  .step-number {
    width: 32px;
    height: 32px;
    font-size: 0.875rem;
  }
  
  .progress-line {
    width: 40px;
    margin: 0 var(--spacing-sm);
  }
  
  .record-btn {
    width: 80px;
    height: 80px;
    font-size: 1.5rem;
  }
  
  .filter-tabs {
    width: 100%;
  }
  
  .filter-tab {
    flex: 1;
  }
  
  .toast-container {
    top: var(--spacing);
    right: var(--spacing);
    left: var(--spacing);
  }
  
  .toast {
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .user-info {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .user-avatar {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .text-display {
    font-size: 1rem;
    padding: var(--spacing-lg);
  }
  
  .review-actions {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .btn {
    width: 100%;
  }
  
  .preference-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing);
  }
}

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

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

.hidden { display: none !important; }
.visible { display: block !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--spacing-xs) !important; }
.mt-2 { margin-top: var(--spacing-sm) !important; }
.mt-3 { margin-top: var(--spacing) !important; }
.mt-4 { margin-top: var(--spacing-md) !important; }
.mt-5 { margin-top: var(--spacing-lg) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--spacing-xs) !important; }
.mb-2 { margin-bottom: var(--spacing-sm) !important; }
.mb-3 { margin-bottom: var(--spacing) !important; }
.mb-4 { margin-bottom: var(--spacing-md) !important; }
.mb-5 { margin-bottom: var(--spacing-lg) !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--spacing-xs) !important; }
.p-2 { padding: var(--spacing-sm) !important; }
.p-3 { padding: var(--spacing) !important; }
.p-4 { padding: var(--spacing-md) !important; }
.p-5 { padding: var(--spacing-lg) !important; }

.flex { display: flex !important; }
.flex-col { flex-direction: column !important; }
.items-center { align-items: center !important; }
.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }

.w-full { width: 100% !important; }
.h-full { height: 100% !important; }

.font-bold { font-weight: 700 !important; }
.font-semibold { font-weight: 600 !important; }
.font-medium { font-weight: 500 !important; }

.text-sm { font-size: 0.875rem !important; }
.text-base { font-size: 1rem !important; }
.text-lg { font-size: 1.125rem !important; }
.text-xl { font-size: 1.25rem !important; }

/* ============================================
   Modal Styles
   ============================================ */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

.modal-overlay.show .modal-content {
  transform: scale(1);
}

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

.modal-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

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

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
}

.text-display-modal {
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--spacing);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100px;
  max-height: 200px;
  overflow-y: auto;
}
.text-2xl { font-size: 1.5rem !important; }

.rounded { border-radius: var(--radius) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-full { border-radius: 9999px !important; }

.shadow { box-shadow: var(--shadow) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }

/* ============================================
   Authentication Styles - Enterprise Modern
   ============================================ */

.auth-body {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  position: relative;
  padding: var(--spacing-lg) 0;
}

.auth-container {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 750px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

.register-card {
  max-width: 920px !important;
}

.auth-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.2);
  overflow: visible;
  position: relative;
  display: flex;
  flex-direction: column;
}

.auth-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.auth-header {
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing);
  margin-bottom: var(--spacing-lg);
}

.brand-logo i {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-logo h1 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.auth-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
  margin: 0;
  max-width: 320px;
  margin: 0 auto;
}

.auth-form {
  padding: var(--spacing-xl);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.form-field {
  margin-bottom: var(--spacing-lg);
}

.field-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.field-label i {
  font-size: 1rem;
  color: var(--primary);
  width: 16px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: inherit;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
  transform: translateY(-1px);
}

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

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix {
  position: absolute;
  left: 16px;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  z-index: 2;
  background: var(--surface);
  padding: 2px 4px;
}

.input-group .form-input {
  padding-left: 70px;
}

.password-input {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: var(--transition);
}

.password-toggle:hover {
  background: var(--gray-100);
  color: var(--text-primary);
}

.select-wrapper {
  position: relative;
}

.form-select {
  width: 100%;
  padding: 14px 16px;
  padding-right: 40px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  appearance: none;
  font-family: inherit;
}

.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
  transform: translateY(-1px);
}

.select-icon {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  pointer-events: none;
  font-size: 0.875rem;
}

.field-error {
  display: block;
  color: var(--danger);
  font-size: 0.8rem;
  margin-top: var(--spacing-xs);
  min-height: 16px;
  font-weight: 500;
}

.field-hint {
  display: block;
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: var(--spacing-xs);
}

.password-strength {
  margin-top: var(--spacing-sm);
}

.strength-bar {
  height: 4px;
  background: var(--gray-200);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: var(--spacing-xs);
}

.strength-fill {
  height: 100%;
  width: 0%;
  transition: all 0.3s ease;
  border-radius: 2px;
}

.strength-fill.weak {
  width: 25%;
  background: var(--danger);
}

.strength-fill.fair {
  width: 50%;
  background: var(--warning);
}

.strength-fill.good {
  width: 75%;
  background: var(--info);
}

.strength-fill.strong {
  width: 100%;
  background: var(--success);
}

.strength-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.form-actions {
  margin-top: var(--spacing-xl);
}

.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--text-inverse);
  border: none;
  padding: 16px 24px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  width: 100%;
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border);
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.btn-secondary:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.2);
}

.btn-text {
  flex: 1;
}

.btn-icon {
  font-size: 0.875rem;
  transition: transform 0.3s ease;
}

.btn-primary:hover .btn-icon,
.btn-secondary:hover .btn-icon {
  transform: translateX(2px);
}

.btn-primary .btn-icon {
  color: var(--text-inverse);
}

.btn-secondary .btn-icon {
  color: inherit;
}

.btn-secondary:hover .btn-icon {
  color: var(--text-inverse);
}

.auth-divider {
  padding: 0 var(--spacing-xl);
  text-align: center;
  position: relative;
}

.auth-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: var(--spacing-xl);
  right: var(--spacing-xl);
  height: 1px;
  background: var(--border);
}

.auth-divider span {
  background: rgba(255, 255, 255, 0.95);
  color: var(--text-secondary);
  font-size: 0.875rem;
  padding: 0 var(--spacing);
  position: relative;
  z-index: 1;
}

.auth-footer {
  padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-xl);
}

.auth-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.bg-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  opacity: 0.9;
}

.bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  33% {
    transform: translateY(-30px) rotate(1deg);
  }
  66% {
    transform: translateY(-20px) rotate(-1deg);
  }
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
}

.loading-overlay.show {
  display: flex;
}

.loading-content {
  background: var(--surface);
  border-radius: 16px;
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-xl);
  min-width: 200px;
}

.loading-content .loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing);
}

.loading-content p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
  font-weight: 500;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 10000;
  pointer-events: none;
  max-width: 400px;
}

.toast {
  background: var(--surface);
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border);
  padding: var(--spacing);
  margin-bottom: var(--spacing);
  display: flex;
  align-items: center;
  gap: var(--spacing);
  pointer-events: auto;
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--danger);
}

.toast.info {
  border-left: 4px solid var(--info);
}

.toast.warning {
  border-left: 4px solid var(--warning);
}

.toast-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.toast.success .toast-icon {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.toast.error .toast-icon {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

.toast.info .toast-icon {
  background: rgba(6, 182, 212, 0.1);
  color: var(--info);
}

.toast.warning .toast-icon {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}

.toast-content {
  flex: 1;
  min-width: 0;
}

.toast-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
  margin-bottom: 2px;
}

.toast-message {
  color: var(--text-secondary);
  font-size: 0.8rem;
  line-height: 1.4;
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: var(--transition);
  flex-shrink: 0;
}

.toast-close:hover {
  background: var(--gray-100);
  color: var(--text-primary);
}

/* Form Field States */
.form-field.success .form-input,
.form-field.success .form-select {
  border-color: var(--success);
}

.form-field.error .form-input,
.form-field.error .form-select {
  border-color: var(--danger);
}

.form-field.error .field-label {
  color: var(--danger);
}

/* ============================================
   Responsive Design for Auth
   ============================================ */

@media (max-width: 768px) {
  .auth-container {
    padding: var(--spacing);
    max-width: none;
  }
  
  .auth-card {
    border-radius: 16px;
    margin: 0;
  }
  
  .auth-header,
  .auth-form,
  .auth-footer {
    padding: var(--spacing-lg);
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  
  .brand-logo h1 {
    font-size: 1.5rem;
  }
  
  .brand-logo i {
    font-size: 2rem;
  }
  
  .auth-subtitle {
    font-size: 0.875rem;
  }
  
  .toast-container {
    top: var(--spacing);
    right: var(--spacing);
    left: var(--spacing);
    max-width: none;
  }
  
  .toast {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .form-input,
  .form-select {
    padding: 12px 14px;
  }
  
  .btn-primary,
  .btn-secondary {
    padding: 14px 20px;
  }
  
  .input-group .form-input {
    padding-left: 55px;
  }
  
  .input-prefix {
    left: 14px;
    font-size: 0.875rem;
  }
}

/* Dark theme support for auth */
[data-theme="dark"] .auth-card {
  background: rgba(30, 41, 59, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .auth-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .auth-divider::before {
  background: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .auth-divider span {
  background: rgba(30, 41, 59, 0.95);
}

[data-theme="dark"] .loading-content {
  background: var(--surface);
}

[data-theme="dark"] .toast {
  background: var(--surface);
  border: 1px solid var(--border);
}

.message-sender {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.message.sent .message-sender {
    color: white;
}

.message.received .message-sender {
    color: var(--text-primary);
}

.message-sender i {
    color: var(--primary);
}

.message.sent .message-sender i {
    color: rgba(255, 255, 255, 0.8);
}

.message-text {
    line-height: 1.6;
    font-size: 0.875rem;
}

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

.message-time {
    font-size: 0.7rem;
    opacity: 0.7;
    text-align: right;
    margin-top: var(--space-sm);
}

.message.sent .message-time {
    color: rgba(255, 255, 255, 0.6);
}

[data-theme="dark"] .message.received .message-content {
    background: var(--gray-800);
}

/* Auth Language Selector */
.auth-language-selector {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 8px;
}

.auth-language-selector i {
    color: var(--text-secondary);
}

.auth-language-selector select {
    color: var(--text-secondary);
    background: transparent;
    border: none;
    font-weight: 500;
    cursor: pointer;
}

.auth-language-selector select:focus {
    outline: none;
}

.auth-language-selector option {
    color: var(--text-primary);
    background: var(--surface);
}

/* Language Selector in Sidebar */
.sidebar-footer .language-selector-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing) var(--spacing-lg);
  margin-bottom: var(--spacing);
  border: 1px solid var(--sidebar-border);
  border-radius: var(--radius);
}

.sidebar-footer .language-selector-wrapper i {
  color: var(--sidebar-text);
}

.sidebar-footer .language-selector-wrapper select {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--sidebar-text);
  font-size: 0.875rem;
  cursor: pointer;
}

.sidebar-footer .language-selector-wrapper select:focus {
  outline: none;
}

.sidebar-footer .language-selector-wrapper option {
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
}

.sidebar.collapsed .language-selector-wrapper {
  display: none;
}
/* ============================================
   Customer Support Section
   ============================================ */

.chat-container {
    display: flex;
    height: 70vh;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

#conversationListContainer {
    width: 100%;
}

#messageViewContainer {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
}

.message-view-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: var(--spacing);
    flex-shrink: 0;
}

.message-view-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.message-list {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.message {
    display: flex;
    gap: var(--spacing);
    max-width: 75%;
    align-items: flex-end;
}

.message.sent {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.received {
    align-self: flex-start;
}

.message-sender {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
}

.message-content {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    line-height: 1.5;
}

.message.sent .message-content {
    background: var(--primary);
    color: var(--text-inverse);
    border-top-right-radius: var(--radius-sm);
}

.message.received .message-content {
    background: var(--gray-100);
    color: var(--text-primary);
    border-top-left-radius: var(--radius-sm);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.message.sent .message-time {
    text-align: right;
}

.message-reply-form {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border);
    background: var(--surface);
    flex-shrink: 0;
}

#replyForm {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

#replyMessage {
    flex: 1;
    min-height: 48px;
    max-height: 150px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 3px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    color: var(--text-primary);
    resize: none;
    font-family: inherit;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

#replyMessage:focus {
    outline: none;
    border-color: var(--primary-dark);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.3);
}

#replyForm .form-group {
    flex-grow: 1;
    margin-bottom: 0;
}

#replyForm button {
    flex-shrink: 0;
    width: auto;
    height: 48px; /* Match input height */
}

.status-badge {
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge.unread {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.status-badge.read {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

/* ============================================
   Audio Preview Styling (Simplified Recording)
   ============================================ */

.audio-preview-container {
    padding: 1.5rem;
    background: var(--surface);
    border-radius: 12px;
    border: 1px solid var(--border-light);
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.audio-preview-container audio {
    width: 100%;
    max-width: 500px;
    height: 40px;
    border-radius: 8px;
    outline: none;
    margin-bottom: 1rem;
    background: var(--surface-hover);
}

.audio-preview-container audio:focus {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.recording-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.recording-status-text {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    color: var(--success);
    font-size: 0.875rem;
}

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

/* Loading states for buttons */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn .fa-spinner {
    animation: spin 1s linear infinite;
}

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

/* Enhanced form validation styles */
.form-control:invalid {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-control:valid {
    border-color: var(--success);
}

/* Better error states */
.error-state {
    border-color: var(--danger) !important;
    background-color: rgba(239, 68, 68, 0.05);
}

.success-state {
    border-color: var(--success) !important;
    background-color: rgba(16, 185, 129, 0.05);
}

/* Upload progress indicator */
.upload-progress {
    position: relative;
    overflow: hidden;
}

.upload-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.3), transparent);
    animation: loading-shimmer 2s infinite;
}

@keyframes loading-shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Mobile responsiveness for audio preview */
@media (max-width: 768px) {
    .audio-preview-container {
        padding: 1rem;
        margin: var(--spacing) 0;
    }
    
    .audio-preview-container audio {
        height: 35px;
        max-width: 100%;
    }
    
    .recording-status-text {
        font-size: 0.8rem;
    }
    
    .recording-duration {
        font-size: 0.8rem;
    }
}

/* ============================================
   Text Actions for Skip Button
   ============================================ */

.text-actions {
    margin-top: 1rem;
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
}

.text-actions .btn {
    margin-bottom: 0.5rem;
}

.skip-hint {
    display: block;
    color: var(--text-secondary);
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

#skipTextBtn {
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

#skipTextBtn:hover {
    background: var(--warning);
    border-color: var(--warning);
    color: white;
}

#skipTextBtn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#skipTextBtn.no-texts {
    display: none;
}

/* Mobile responsiveness for skip button */
@media (max-width: 768px) {
    .text-actions {
        margin-top: 0.75rem;
        padding-top: 0.75rem;
    }
    
    .skip-hint {
        font-size: 0.7rem;
    }
}