/* ============================================
   MCQ Platform - Main Stylesheet
   Version: 2.0
   Description: Modern, responsive, animated CSS
============================================ */

/* CSS Variables */
:root {
  /* Brand Colors */
  --primary-blue: #004e89;
  --secondary-blue: #1a659e;
  --primary-orange: #ff6b35;
  --secondary-orange: #ff8c42;

  --primary: #007bff; /* Bootstrap-like default */
  --primary-dark: #0056b3;
  --secondary: #6c757d;

  --success: #28a745;
  --warning: #ffc107;
  --danger: #dc3545;
  --info: #17a2b8;

  /* Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --bg-light: #fdfdfd;

  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;

  --border-color: #dee2e6;
  --shadow-color: rgba(0, 0, 0, 0.1);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 3rem;

  /* Borders */
  --border-radius-sm: 0.375rem;
  --border-radius: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  --border-radius-xxl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  --shadow-xl: 0 2rem 4rem rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* Dark Theme Variables */
[data-bs-theme="dark"] {
  --bg-primary: #212529;
  --bg-secondary: #343a40;
  --bg-tertiary: #495057;
  --bg-light: #2a2f34;

  --text-primary: #ffffff;
  --text-secondary: #adb5bd;
  --text-muted: #6c757d;

  --border-color: #495057;
  --shadow-color: rgba(0, 0, 0, 0.3);
}

/* Base Styles */
* {
  box-sizing: border-box;
}

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

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  transition: var(--transition);
  overflow-x: hidden;
}

/* Selection */
::selection {
  background: rgba(0, 78, 137, 0.2);
  color: var(--text-primary);
}

::-moz-selection {
  background: rgba(0, 78, 137, 0.2);
  color: var(--text-primary);
}

[data-bs-theme="dark"] ::selection {
  background: rgba(255, 107, 53, 0.3);
  color: var(--text-primary);
}

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

::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: var(--border-radius-sm);
  border: 2px solid var(--bg-tertiary);
}

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

[data-bs-theme="dark"] ::-webkit-scrollbar-thumb {
  background: linear-gradient(
    135deg,
    var(--primary-blue),
    var(--primary-orange)
  );
}

/* Focus States */
*:focus {
  outline: 2px solid var(--primary-orange) !important;
  outline-offset: 2px !important;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-blue);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--border-radius);
  z-index: var(--z-tooltip);
  transition: var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Layout */
.main-content {
  min-height: calc(100vh - 140px);
  padding-top: 100px;
  transition: var(--transition);
}

.auth-content {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-blue) 0%, #667eea 100%);
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

[data-bs-theme="dark"] .loading-overlay {
  background: rgba(33, 37, 41, 0.95);
}

.loading-overlay.fade-out {
  opacity: 0;
  pointer-events: none;
}

.loading-content {
  text-align: center;
  animation: pulse 2s infinite;
}

.loading-spinner {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
}

.spinner-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 4px solid rgba(0, 78, 137, 0.1);
  border-top: 4px solid var(--primary-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: 0.5px;
}

/* Navbar */
.navbar {
  background: linear-gradient(135deg, #343a40 0%, #1a1a1a 100%) !important;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.75rem 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: var(--z-fixed);
  transition: var(--transition);
}

[data-bs-theme="dark"] .navbar {
  background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%) !important;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  text-decoration: none;
  transition: var(--transition-fast);
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  width: 40px;
  height: 40px;
  background: linear-gradient(
    135deg,
    var(--primary-orange),
    var(--secondary-orange)
  );
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 1rem;
  box-shadow: var(--shadow);
}

.brand-text {
  background: linear-gradient(
    135deg,
    var(--primary-orange),
    var(--primary-blue)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Navigation Links */
.nav-link {
  font-weight: 500;
  padding: 0.6rem 1rem;
  border-radius: var(--border-radius-lg);
  margin: 0 0.25rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition-fast);
  color: rgba(255, 255, 255, 0.8);
}

.nav-link::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transition: left 0.5s;
}

.nav-link:hover::before {
  left: 100%;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  transform: translateY(-1px);
}

.nav-link.active {
  background: linear-gradient(
    135deg,
    var(--primary-blue),
    var(--secondary-blue)
  );
  color: white !important;
  box-shadow: var(--shadow);
}

.admin-link {
  background: linear-gradient(135deg, var(--warning), #ff9500);
  color: white !important;
  font-weight: 600;
}

/* User Avatar */
.user-dropdown {
  padding: 0.5rem 1rem;
}

.user-avatar-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-orange);
}

.avatar-placeholder {
  width: 32px;
  height: 32px;
  background: linear-gradient(
    135deg,
    var(--primary-blue),
    var(--secondary-blue)
  );
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
  border: 2px solid var(--primary-orange);
}

.user-name {
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
}

/* Notification Badge */
.notification-badge {
  top: -8px;
  right: -8px;
  min-width: 18px;
  height: 18px;
  font-size: 0.65rem;
  font-weight: 600;
  border: 2px solid #343a40;
  animation: pulse 2s infinite;
  display: none;
}

/* Dropdowns */
.dropdown-menu {
  position: absolute; /* take it out of normal flow */
  z-index: 9999; /* ensure it’s on top of other elements */
  background: var(--bg-primary);
  border: none;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 0.5rem 0;
  margin-top: 0.5rem;
  animation: dropdownFadeIn 0.3s ease;
  min-width: 200px;
}

[data-bs-theme="dark"] .dropdown-menu {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.dropdown-item {
  padding: 0.75rem 1.5rem;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
  color: var(--text-primary);
  display: flex;
  align-items: center;
}

.dropdown-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 78, 137, 0.1),
    transparent
  );
  transition: left 0.3s;
}

.dropdown-item:hover::before {
  left: 100%;
}

.dropdown-item:hover {
  background: linear-gradient(
    135deg,
    rgba(0, 78, 137, 0.1),
    rgba(255, 107, 53, 0.05)
  );
  color: var(--primary-blue);
  transform: translateX(5px);
}

.dropdown-header {
  padding: 0.75rem 1.5rem;
  margin-bottom: 0.5rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  margin: 0.5rem;
}

.user-info {
  text-align: left;
}

.user-email {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.user-role {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.logout-link:hover {
  background: linear-gradient(
    135deg,
    rgba(220, 53, 69, 0.1),
    rgba(220, 53, 69, 0.05)
  );
  color: var(--danger) !important;
}

/* Theme Options */
.theme-option {
  position: relative;
}

.theme-option.active {
  background: linear-gradient(
    135deg,
    var(--primary-blue),
    var(--secondary-blue)
  );
  color: white !important;
  font-weight: 600;
}

.theme-option.active::after {
  content: "✓";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
}

/* Cards */
.dashboard-card,
.card {
  background: var(--bg-primary);
  border: none;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
  position: relative;
  margin-bottom: 2rem;
}

.dashboard-card::before,
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--primary-orange),
    var(--primary-blue)
  );
  opacity: 0;
  transition: var(--transition);
}

.dashboard-card:hover,
.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-5px);
}

.dashboard-card:hover::before,
.card:hover::before {
  opacity: 1;
}

.card-header {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem;
  display: flex;
  justify-content: between;
  align-items: center;
}

.card-title {
  font-weight: 600;
  font-size: 1.1rem;
  margin: 0;
  color: var(--text-primary);
  display: flex;
  align-items: center;
}

.card-actions {
  margin-left: auto;
}

.card-body {
  padding: 1.5rem;
}

/* Welcome Header */
.welcome-header {
  background: linear-gradient(
    135deg,
    var(--primary-blue) 0%,
    #667eea 50%,
    var(--primary-orange) 100%
  );
  color: white;
  padding: 3rem 0;
  border-radius: var(--border-radius-xxl);
  margin-bottom: 2rem;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.welcome-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.welcome-subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 0;
}

.welcome-actions {
  margin-top: 1rem;
}

.welcome-bg-animation {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.floating-shapes {
  position: relative;
  width: 100%;
  height: 100%;
}

.shape {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  animation: float 6s ease-in-out infinite;
}

.shape-1 {
  width: 80px;
  height: 80px;
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.shape-2 {
  width: 60px;
  height: 60px;
  top: 60%;
  right: 20%;
  animation-delay: 2s;
}

.shape-3 {
  width: 100px;
  height: 100px;
  bottom: 20%;
  left: 60%;
  animation-delay: 4s;
}

/* Statistics Cards */
.stat-card {
  background: var(--bg-primary);
  border: none;
  border-radius: var(--border-radius-xl);
  padding: 0;
  box-shadow: var(--shadow);
  transition: var(--transition);
  overflow: hidden;
  position: relative;
  height: 100%;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--primary-orange),
    var(--primary-blue)
  );
}

.stat-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.stat-card-inner {
  padding: 2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.stat-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(
    135deg,
    var(--primary-blue),
    var(--secondary-blue)
  );
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.stat-icon-success {
  background: linear-gradient(135deg, var(--success), #20c997);
}

.stat-icon-info {
  background: linear-gradient(135deg, var(--info), #3b82f6);
}

.stat-icon-warning {
  background: linear-gradient(135deg, var(--warning), #f59e0b);
}

.stat-icon::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: var(--transition);
  transform: scale(0);
}

.stat-card:hover .stat-icon::before {
  transform: scale(1);
}

.stat-content {
  flex: 1;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.stat-trend {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.stat-progress {
  height: 4px;
  background: rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--primary-blue),
    var(--secondary-blue)
  );
  transition: width 2s ease;
  position: relative;
}

.progress-bar.bg-success {
  background: linear-gradient(90deg, var(--success), #20c997);
}

.progress-bar.bg-info {
  background: linear-gradient(90deg, var(--info), #3b82f6);
}

.progress-bar.bg-warning {
  background: linear-gradient(90deg, var(--warning), #f59e0b);
}

/* Quick Actions */
.quick-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.quick-action-btn {
  display: flex;
  align-items: center;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.quick-action-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transition: left 0.5s;
}

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

.quick-action-btn:hover {
  transform: translateX(8px);
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
}

.action-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: white;
  margin-right: 1rem;
  flex-shrink: 0;
}

.action-content {
  flex: 1;
}

.action-title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.action-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.action-arrow {
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.quick-action-btn:hover .action-arrow {
  color: var(--primary-blue);
  transform: translateX(5px);
}

/* Recent Items */
.recent-items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.recent-item {
  display: flex;
  align-items: center;
  padding: 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.recent-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--primary-blue);
  transform: scaleY(0);
  transition: var(--transition);
}

.recent-item:hover::before {
  transform: scaleY(1);
}

.recent-item:hover {
  background: var(--bg-primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.item-icon {
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-right: 1rem;
  flex-shrink: 0;
}

.item-content {
  flex: 1;
}

.item-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  font-size: 0.95rem;
}

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

.item-actions {
  margin-left: 1rem;
}

/* Chart Container */
.chart-container {
  position: relative;
  width: 100%;
  height: 350px;
  padding: 1rem 0;
}

/* Buttons */
.btn {
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
  border: none;
  text-transform: none;
  letter-spacing: 0.025em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

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

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

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--primary-blue),
    var(--secondary-blue)
  );
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #003a6b, var(--primary-blue));
  color: white;
}

.btn-success {
  background: linear-gradient(135deg, var(--success), #20c997);
  color: white;
}

.btn-warning {
  background: linear-gradient(135deg, var(--warning), #f59e0b);
  color: white;
}

.btn-outline-primary {
  color: var(--primary-blue);
  border: 2px solid var(--primary-blue);
  background: transparent;
}


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

.btn-outline-light {
  color: rgba(255, 255, 255, 0.8);
  border: 2px solid rgba(255, 255, 255, 0.3);
  background: transparent;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Form Controls */
.form-control,
.form-select {
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 0.75rem 1rem;
  transition: var(--transition-fast);
  color: var(--text-primary);
  font-size: 1rem;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 0.25rem rgba(0, 78, 137, 0.15);
  transform: translateY(-1px);
  outline: none;
}

[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
  background: var(--bg-secondary);
  border-color: var(--border-color);
  color: var(--text-primary);
}

/* Footer */
.footer {
  background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
}

.footer-brand {
  margin-bottom: 2rem;
}

.footer-logo {
  width: 40px;
  height: 40px;
  background: linear-gradient(
    135deg,
    var(--primary-orange),
    var(--secondary-orange)
  );
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 1rem;
}

.footer-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 1rem 0;
}

.footer-title {
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 0.875rem;
  margin-bottom: 1rem;
  position: relative;
}

.footer-title::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--primary-orange),
    var(--primary-blue)
  );
  border-radius: 1px;
}

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

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
}

.footer-link:hover {
  color: var(--primary-blue);
  transform: translateX(5px);
}

.social-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 50%;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--primary-blue),
    var(--primary-orange)
  );
  transform: scale(0);
  transition: var(--transition);
  border-radius: 50%;
}

.social-link:hover::before {
  transform: scale(1);
}

.social-link:hover {
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.social-link i {
  position: relative;
  z-index: 1;
}

.contact-info {
  font-size: 0.875rem;
}

.contact-item {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  margin-bottom: 0.5rem;
}

.contact-item i {
  color: var(--primary-blue);
  margin-right: 0.5rem;
  width: 16px;
  text-align: center;
}

.footer-divider {
  border-color: var(--border-color);
  margin: 2rem 0 1rem;
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0;
}

.love-text {
  color: var(--text-secondary);
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
}

.footer-bg-animation {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.05;
}

.footer-wave {
  position: absolute;
  top: -50px;
  left: -10%;
  width: 120%;
  height: 100px;
  background: linear-gradient(
    135deg,
    var(--primary-blue),
    var(--primary-orange)
  );
  border-radius: 50% 50% 0 0;
  animation: wave 10s ease-in-out infinite;
}

/* Toast Notifications */
.toast-container {
  z-index: var(--z-toast);
}

.toast {
  background: var(--bg-primary);
  border: none;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  margin-bottom: 0.5rem;
  border-left: 4px solid var(--primary-blue);
}

.toast.border-success {
  border-left-color: var(--success);
}

.toast.border-warning {
  border-left-color: var(--warning);
}

.toast.border-danger {
  border-left-color: var(--danger);
}

.toast.border-info {
  border-left-color: var(--info);
}

.toast-body {
  padding: 1rem 1.5rem;
  font-weight: 500;
  display: flex;
  align-items: center;
}

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.toast-progress .progress-bar {
  height: 100%;
  transition: none;
  animation: toast-progress linear;
}

/* Utilities */
.text-gradient {
  background: linear-gradient(
    135deg,
    var(--primary-orange),
    var(--primary-blue)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
}

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

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

.rounded-custom {
  border-radius: var(--border-radius-lg) !important;
}

.hover-lift {
  transition: var(--transition);
}

.hover-lift:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.hover-scale {
  transition: var(--transition);
}

.hover-scale:hover {
  transform: scale(1.05);
}

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

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes wave {
  0%,
  100% {
    transform: translateX(0) scaleY(1);
  }
  50% {
    transform: translateX(-20px) scaleY(1.1);
  }
}

@keyframes dropdownFadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toast-progress {
  from {
    width: 100%;
  }
  to {
    width: 0%;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 1200px) {
  .chart-container {
    height: 300px;
  }
}

@media (max-width: 768px) {
  .main-content {
    padding-top: 80px;
  }

  .welcome-title {
    font-size: 2rem;
  }

  .welcome-header {
    padding: 2rem 0;
    text-align: center;
  }

  .welcome-actions {
    justify-content: center;
  }

  .stat-card-inner {
    padding: 1.5rem;
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .chart-container {
    height: 250px;
  }

  .quick-action-btn {
    padding: 1rem;
  }

  .action-icon {
    width: 45px;
    height: 45px;
    font-size: 1.1rem;
  }

  .navbar-brand {
    font-size: 1.25rem;
  }

  .brand-logo {
    width: 35px;
    height: 35px;
    font-size: 0.9rem;
  }
}

@media (max-width: 576px) {
  .container-fluid {
    padding: 0.5rem;
  }

  .welcome-header {
    margin-left: -0.5rem;
    margin-right: -0.5rem;
    border-radius: var(--border-radius-lg);
  }

  .welcome-title {
    font-size: 1.75rem;
  }

  .card-body {
    padding: 1rem;
  }

  .stat-card-inner {
    padding: 1rem;
  }

  .stat-number {
    font-size: 1.75rem;
  }

  .chart-container {
    height: 200px;
  }

  .footer {
    padding: 2rem 0 1rem;
    text-align: center;
  }

  .footer-title {
    margin-top: 2rem;
  }

  .footer-title:first-child {
    margin-top: 0;
  }

  .social-links {
    justify-content: center;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .footer,
  .welcome-header,
  .btn,
  .no-print {
    display: none !important;
  }

  .main-content {
    padding-top: 0 !important;
    margin: 0 !important;
  }

  .card,
  .dashboard-card {
    border: 1px solid #dee2e6 !important;
    box-shadow: none !important;
    break-inside: avoid;
  }

  .page-break {
    page-break-before: always;
  }
}

/* Dark Theme Enhancements */
[data-bs-theme="dark"] {
  color-scheme: dark;
}

[data-bs-theme="dark"] .welcome-header {
  background: linear-gradient(135deg, #1a1a1a 0%, #2d3748 50%, #1a365d 100%);
}

[data-bs-theme="dark"] .card,
[data-bs-theme="dark"] .dashboard-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

[data-bs-theme="dark"] .card-header {
  background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
  border-color: var(--border-color);
}

[data-bs-theme="dark"] .stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

[data-bs-theme="dark"] .quick-action-btn {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
}

[data-bs-theme="dark"] .quick-action-btn:hover {
  background: var(--bg-primary);
  border-color: var(--primary-blue);
}

[data-bs-theme="dark"] .recent-item {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
}

[data-bs-theme="dark"] .recent-item:hover {
  background: var(--bg-primary);
}

[data-bs-theme="dark"] .footer {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border-color: var(--border-color);
}

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

/* 
###############################################
Additional CSS for Admin Dashboard
################################################
*/

/* Admin Dashboard Styles */
.admin-dashboard {
  padding: 0;
}

.admin-header {
  background: linear-gradient(135deg, #dc3545 0%, #6f42c1 50%, #fd7e14 100%);
  color: white;
  padding: 3rem 0;
  border-radius: var(--border-radius-xxl);
  margin-bottom: 2rem;
  box-shadow: var(--shadow-xl);
  position: relative;
  /* overflow: hidden; */
}

.admin-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.admin-subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 0;
}

.admin-actions {
  margin-top: 1rem;
}

/* Admin Statistics Cards */
.admin-stat-card {
  background: var(--bg-primary);
  border: none;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow);
  transition: var(--transition);
  overflow: hidden;
  position: relative;
  height: 100%;
}

.admin-stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--primary-orange),
    var(--primary-blue)
  );
}

.admin-stat-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.admin-stat-card .stat-card-inner {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.admin-stat-card .stat-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  box-shadow: var(--shadow);
}

.stat-icon-primary {
  background: linear-gradient(
    135deg,
    var(--primary-blue),
    var(--secondary-blue)
  );
}

.stat-icon-warning {
  background: linear-gradient(135deg, var(--warning), #f59e0b);
}

.stat-icon-danger {
  background: linear-gradient(135deg, var(--danger), #ef4444);
}

.stat-icon-success {
  background: linear-gradient(135deg, var(--success), #10b981);
}

.admin-stat-card .stat-content {
  flex: 1;
}

.admin-stat-card .stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.admin-stat-card .stat-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.admin-stat-card .stat-meta {
  font-size: 0.8rem;
}

.stat-actions {
  padding: 0 1.5rem 1.5rem;
}

/* Health Metrics */
.health-metrics {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.health-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  transition: var(--transition);
}

.health-item:hover {
  background: var(--bg-primary);
  box-shadow: var(--shadow);
}

.health-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.health-content {
  flex: 1;
}

.health-label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.health-status .badge {
  font-size: 0.75rem;
}

/* Activity Feed */
.activity-feed {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 400px;
  overflow-y: auto;
}

.activity-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  transition: var(--transition);
  position: relative;
}

.activity-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--primary-blue);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  transform: scaleY(0);
  transition: var(--transition);
}

.activity-item:hover::before {
  transform: scaleY(1);
}

.activity-item:hover {
  background: var(--bg-primary);
  box-shadow: var(--shadow);
}

.activity-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.activity-content {
  flex: 1;
}

.activity-text {
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
}

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

/* Management Tools */
.management-tools {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.management-tool-btn {
  display: flex;
  align-items: center;
  padding: 1.25rem;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.management-tool-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transition: left 0.5s;
}

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

.management-tool-btn:hover {
  transform: translateX(8px);
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
  color: var(--text-primary);
}

.tool-icon {
  width: 45px;
  height: 45px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: white;
  margin-right: 1rem;
  flex-shrink: 0;
}

.tool-content {
  flex: 1;
}

.tool-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

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

.tool-arrow {
  font-size: 1.1rem;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.management-tool-btn:hover .tool-arrow {
  color: var(--primary-blue);
  transform: translateX(5px);
}

/* Dark theme adjustments for admin */
[data-bs-theme="dark"] .admin-header {
  background: linear-gradient(135deg, #7c2d12 0%, #451a03 50%, #92400e 100%);
}

[data-bs-theme="dark"] .admin-stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

[data-bs-theme="dark"] .health-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
}

[data-bs-theme="dark"] .health-item:hover {
  background: var(--bg-primary);
}

[data-bs-theme="dark"] .activity-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
}

[data-bs-theme="dark"] .activity-item:hover {
  background: var(--bg-primary);
}

[data-bs-theme="dark"] .management-tool-btn {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
}

[data-bs-theme="dark"] .management-tool-btn:hover {
  background: var(--bg-primary);
  border-color: var(--primary-blue);
}

/* Responsive adjustments for admin dashboard */
@media (max-width: 768px) {
  .admin-title {
    font-size: 2rem;
  }

  .admin-header {
    padding: 2rem 0;
    text-align: center;
  }

  .admin-stat-card .stat-card-inner {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }

  .admin-stat-card .stat-number {
    font-size: 1.75rem;
  }
}

@media (max-width: 576px) {
  .admin-stat-card .stat-card-inner {
    padding: 1rem;
  }

  .health-item,
  .activity-item,
  .management-tool-btn {
    padding: 1rem;
  }
}

/* Dark Mode Support (For text generation css) */
@media (color-scheme: dark) {
  .extraction-card,
  .part-editor,
  .editor-toolbar,
  .filter-section {
    background: var(--dark-bg, #2d3748);
    color: var(--dark-text, #e2e8f0);
  }

  .form-control,
  .form-select {
    background: var(--dark-bg, #2d3748);
    border-color: var(--dark-border, #4a5568);
    color: var(--dark-text, #e2e8f0);
  }
}

/* Dark mode support (For mcq generation css) */
@media (color-scheme: dark) {
  .generation-card,
  .part-section,
  .mcq-container,
  .filter-section,
  .process-card {
    background: var(--dark-bg);
    border-color: var(--dark-border);
  }

  .form-control-modern,
  .mcq-textarea {
    background: var(--dark-input-bg);
    color: var(--dark-text);
    border-color: var(--dark-border);
  }

  .part-header,
  .mcq-header {
    background: var(--dark-bg-secondary);
  }

  .calculation-panel {
    background: var(--dark-bg-secondary);
  }

  .model-card {
    background: var(--dark-bg);
    border-color: var(--dark-border);
  }

  .model-card:hover,
  .model-card.selected {
    background: rgba(var(--primary-rgb), 0.1);
  }
}

/* Dark theme support (For mcq generation css) */
@media (color-scheme: dark) {
  .generation-card {
    background: #2d3748;
    color: #e2e8f0;
  }

  .search-extraction-input {
    background: #4a5568;
    border-color: #718096;
    color: #e2e8f0;
  }

  .search-extraction-input:focus {
    background: #2d3748;
    border-color: #667eea;
  }

  .search-results {
    background: #2d3748;
    border-color: #718096;
  }

  .search-result-item {
    border-bottom-color: #4a5568;
    color: #e2e8f0;
  }

  .model-card {
    background: #4a5568;
    border-color: #718096;
    color: #e2e8f0;
  }
}

/* Dark theme support (For mcq history css) */
@media (color-scheme: dark) {
    :root {
        --mcq-shadow: 0 4px 6px -1px rgba(255, 255, 255, 0.1), 0 2px 4px -1px rgba(255, 255, 255, 0.06);
        --mcq-shadow-lg: 0 10px 15px -3px rgba(255, 255, 255, 0.1), 0 4px 6px -2px rgba(255, 255, 255, 0.05);
        --mcq-shadow-xl: 0 20px 25px -5px rgba(255, 255, 255, 0.1), 0 10px 10px -5px rgba(255, 255, 255, 0.04);
    }
    
    .mcq-history-card {
        background: #1e293b;
        border-color: #334155;
    }
    
    .filter-section {
        background: #1e293b;
        border-color: #334155;
    }
    
    .meta-badge {
        background: #334155;
        color: #e2e8f0;
        border-color: #475569;
    }
    
    .pagination .page-link {
        background: #1e293b;
        border-color: #334155;
        color: #e2e8f0;
    }
}


/* Dark mode support */
@media (color-scheme: dark) {
  .textarea-overlay {
    background: #2d3748;
    border-color: #4a5568;
    color: #e2e8f0;
  }

  .chemical-formula {
    background-color: rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
  }

  .math-content .MathJax_Display {
    background: rgba(45, 55, 72, 0.8);
    border-left-color: #4299e1;
  }
}