/* ==========================================================================
   GNIUS COMPONENTS - REUSABLE UI COMPONENTS
   Using BEM methodology with gn- prefix
   ========================================================================== */

/* ==========================================================================
   ACCESSIBILITY UTILITIES
   ========================================================================== */

/* Screen reader only content - visually hidden but accessible to screen readers */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Show screen reader content when focused (for skip links) */
.sr-only-focusable:active,
.sr-only-focusable:focus {
  position: static !important;
  width: auto !important;
  height: auto !important;
  padding: inherit !important;
  margin: inherit !important;
  overflow: visible !important;
  clip: auto !important;
  white-space: inherit !important;
}

/* ==========================================================================
   STUDENT SELECTION MODAL - ORGANIZATION DASHBOARD
   ========================================================================== */

.gn-student-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1050; /* High z-index for modal */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.3s ease;
}

.gn-student-modal--visible {
  opacity: 1;
  visibility: visible;
}

/* Modal Backdrop */
.gn-student-modal__backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* Modal Container */
.gn-student-modal__container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  width: 90%;
  max-width: 600px;
  max-height: 85vh;
  background-color: var(--gn-color-white);
  border-radius: 16px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.gn-student-modal--visible .gn-student-modal__container {
  transform: translate(-50%, -50%) scale(1);
}

/* Modal Header */
.gn-student-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 32px;
  background: linear-gradient(135deg, var(--gn-color-primary) 0%, var(--gn-color-primary-dark) 100%);
  color: var(--gn-color-white);
}

.gn-student-modal__title {
  font-size: 20px;
  font-weight: 700;
  font-family: 'Morn Bold', sans-serif;
  color: var(--gn-color-white);
  margin: 0;
}

.gn-student-modal__subtitle {
  font-size: 14px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.8);
  margin: 4px 0 0 0;
}

/* Close Button */
.gn-student-modal__close {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: var(--gn-color-white);
  cursor: pointer;
  padding: 12px;
  border-radius: 12px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}

.gn-student-modal__close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

.gn-student-modal__close:focus {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

.gn-student-modal__close:active {
  transform: scale(0.95);
}

/* Modal Content */
.gn-student-modal__content {
  padding: 32px;
  max-height: 60vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.gn-student-modal__content::-webkit-scrollbar {
  width: 6px;
}

.gn-student-modal__content::-webkit-scrollbar-track {
  background: var(--gn-color-gray-100);
  border-radius: 3px;
}

.gn-student-modal__content::-webkit-scrollbar-thumb {
  background: var(--gn-color-gray-300);
  border-radius: 3px;
}

.gn-student-modal__content::-webkit-scrollbar-thumb:hover {
  background: var(--gn-color-gray-400);
}

/* Empty State */
.gn-student-modal__empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--gn-color-gray-500);
}

.gn-student-modal__empty-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  opacity: 0.5;
}

.gn-student-modal__empty-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--gn-color-gray-700);
}

.gn-student-modal__empty-message {
  font-size: 14px;
  line-height: 1.5;
}

/* ==========================================================================
   STUDENT LIST STYLES
   ========================================================================== */

.gn-student-modal__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Student Item */
.gn-student-modal__item {
  display: flex;
  align-items: center;
  padding: 20px;
  border: 2px solid var(--gn-color-gray-200);
  border-radius: 12px;
  cursor: pointer;
  background-color: var(--gn-color-white);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.gn-student-modal__item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(2, 131, 194, 0.05), transparent);
  transition: left 0.5s ease;
}

.gn-student-modal__item:hover::before {
  left: 100%;
}

.gn-student-modal__item:hover {
  border-color: var(--gn-color-primary);
  background-color: var(--gn-color-primary-50);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px -8px rgba(2, 131, 194, 0.3);
}

.gn-student-modal__item:focus {
  outline: 2px solid var(--gn-color-primary);
  outline-offset: 2px;
}

.gn-student-modal__item:active {
  transform: translateY(0);
}

/* Student Item Selected State */
.gn-student-modal__item--selected {
  border-color: var(--gn-color-primary);
  background-color: var(--gn-color-primary-light);
  box-shadow: 0 4px 12px -4px rgba(2, 131, 194, 0.4);
}

/* Student Avatar */
.gn-student-modal__item-avatar {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 16px;
  background: linear-gradient(135deg, var(--gn-color-primary) 0%, var(--gn-color-primary-dark) 100%);
  border-radius: 50%;
  color: var(--gn-color-white);
  font-weight: 700;
  font-size: 18px;
  font-family: 'Morn Bold', sans-serif;
}

/* Student Content */
.gn-student-modal__item-content {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.gn-student-modal__item-info {
  flex: 0 0 200px;
  min-width: 0;
}

.gn-student-modal__item-name {
  font-size: 16px;
  font-weight: 600;
  font-family: 'Morn Medium', sans-serif;
  color: var(--gn-color-gray-800);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gn-student-modal__item-class {
  font-size: 13px;
  color: var(--gn-color-gray-600);
  font-weight: 500;
}

/* Progress Section */
.gn-student-modal__item-progress {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-right: 16px;
}

.gn-student-modal__item-progress-label {
  font-size: 12px;
  color: var(--gn-color-gray-600);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.gn-student-modal__item-progress-bar {
  width: 100%;
  height: 10px;
  background-color: var(--gn-color-gray-200);
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}

.gn-student-modal__item-progress-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.gn-student-modal__item-progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shimmer 2s infinite;
}

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

/* Progress Colors */
.gn-student-modal__item-progress-fill--excellent {
  background: linear-gradient(135deg, var(--gn-color-success) 0%, #059669 100%);
}

.gn-student-modal__item-progress-fill--good {
  background: linear-gradient(135deg, var(--gn-color-warning) 0%, #d97706 100%);
}

.gn-student-modal__item-progress-fill--average {
  background: linear-gradient(135deg, var(--gn-color-danger) 0%, #dc2626 100%);
}

.gn-student-modal__item-progress-fill--poor {
  background: linear-gradient(135deg, var(--gn-color-gray-500) 0%, var(--gn-color-gray-600) 100%);
}

/* Score Display */
.gn-student-modal__item-score {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 60px;
}

.gn-student-modal__item-percentage {
  font-size: 20px;
  font-weight: 700;
  font-family: 'Morn Bold', sans-serif;
  color: var(--gn-color-gray-800);
  line-height: 1;
}

.gn-student-modal__item-score-label {
  font-size: 11px;
  color: var(--gn-color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

/* Arrow Indicator */
.gn-student-modal__item-arrow {
  flex-shrink: 0;
  color: var(--gn-color-gray-400);
  margin-left: 12px;
  transition: all 0.2s ease;
  font-size: 16px;
}

.gn-student-modal__item:hover .gn-student-modal__item-arrow {
  color: var(--gn-color-primary);
  transform: translateX(4px);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

/* Tablet */
@media (max-width: 768px) {
  .gn-student-modal__container {
    width: 95%;
    max-width: none;
    margin: 20px;
    max-height: 90vh;
  }
  
  .gn-student-modal__header {
    padding: 20px 24px;
  }
  
  .gn-student-modal__title {
    font-size: 18px;
  }
  
  .gn-student-modal__content {
    padding: 24px;
  }
  
  .gn-student-modal__item {
    padding: 16px;
  }
  
  .gn-student-modal__item-info {
    flex: 0 0 160px;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .gn-student-modal__container {
    width: 100%;
    height: 100%;
    max-height: 100vh;
    border-radius: 0;
    transform: translate(-50%, -50%);
    top: 50%;
    left: 50%;
  }
  
  .gn-student-modal--visible .gn-student-modal__container {
    transform: translate(-50%, -50%);
  }
  
  .gn-student-modal__header {
    padding: 16px 20px;
  }
  
  .gn-student-modal__title {
    font-size: 16px;
  }
  
  .gn-student-modal__subtitle {
    font-size: 13px;
  }
  
  .gn-student-modal__content {
    padding: 20px;
    max-height: calc(100vh - 120px);
  }
  
  .gn-student-modal__item {
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .gn-student-modal__item-content {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .gn-student-modal__item-avatar {
    align-self: flex-start;
    margin-right: 0;
  }
  
  .gn-student-modal__item-info {
    flex: none;
    order: 1;
  }
  
  .gn-student-modal__item-progress {
    flex: none;
    margin-right: 0;
    order: 2;
  }
  
  .gn-student-modal__item-score {
    align-self: flex-end;
    order: 3;
  }
  
  .gn-student-modal__item-arrow {
    position: absolute;
    top: 16px;
    right: 16px;
    margin-left: 0;
  }
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .gn-student-modal,
  .gn-student-modal__container,
  .gn-student-modal__item,
  .gn-student-modal__item-progress-fill,
  .gn-student-modal__item-arrow,
  .gn-student-modal__close {
    transition: none;
  }
  
  .gn-student-modal__item::before,
  .gn-student-modal__item-progress-fill::after {
    animation: none;
  }
}

/* High Contrast */
@media (prefers-contrast: high) {
  .gn-student-modal__backdrop {
    background-color: rgba(0, 0, 0, 0.8);
  }
  
  .gn-student-modal__item {
    border-width: 3px;
  }
  
  .gn-student-modal__item:hover {
    border-width: 4px;
  }
}

/* Focus Visible */
.gn-student-modal__item:focus-visible {
  outline: 3px solid var(--gn-color-primary);
  outline-offset: 2px;
}

.gn-student-modal__close:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.8);
  outline-offset: 2px;
}

/* ==========================================================================
   LOADING STATES
   ========================================================================== */

.gn-student-modal__loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  color: var(--gn-color-gray-500);
}

.gn-student-modal__loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--gn-color-gray-200);
  border-top: 4px solid var(--gn-color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 16px;
}

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

.gn-student-modal__loading-text {
  font-size: 14px;
  font-weight: 500;
}

/* ==========================================================================
   GENERIC MODAL SYSTEM (UI Manager)
   ========================================================================== */

.gn-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1050;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  animation: fadeIn 0.2s ease-out forwards;
}

.gn-modal-overlay--backdrop {
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.gn-modal {
  position: relative;
  background-color: var(--gn-color-white);
  border-radius: 12px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.95);
  animation: scaleIn 0.2s ease-out 0.1s forwards;
}

.gn-modal--small {
  width: 90%;
  max-width: 400px;
}

.gn-modal--medium {
  width: 90%;
  max-width: 500px;
}

.gn-modal--large {
  width: 90%;
  max-width: 700px;
}

.gn-modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border: none;
  background: rgba(0, 0, 0, 0.1);
  color: var(--gn-color-gray-600);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  z-index: 1;
}

.gn-modal__close:hover {
  background: rgba(0, 0, 0, 0.2);
  color: var(--gn-color-gray-800);
  transform: scale(1.1);
}

.gn-modal__close:focus {
  outline: 2px solid var(--gn-color-primary);
  outline-offset: 2px;
}

.gn-modal__content {
  padding: 24px;
  max-height: calc(90vh - 48px);
  overflow-y: auto;
}

/* Animation Keyframes */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes scaleIn {
  from {
    transform: scale(0.95);
  }
  to {
    transform: scale(1);
  }
}

/* Responsive Design */
@media (max-width: 640px) {
  .gn-modal {
    margin: 16px;
  }
  
  .gn-modal--small,
  .gn-modal--medium,
  .gn-modal--large {
    width: calc(100% - 32px);
    max-width: none;
  }
  
  .gn-modal__content {
    padding: 20px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .gn-modal-overlay,
  .gn-modal,
  .gn-modal__close {
    animation: none;
  }
  
  .gn-modal {
    transform: none;
  }
  
  .gn-modal-overlay {
    opacity: 1;
  }
}

/* ==========================================================================
   STUDENT SELECTION MODAL CONTENT (Organization Dashboard)
   ========================================================================== */

.gn-student-selection-modal__content {
  /* Content wrapper */
}

.gn-student-selection-modal__header {
  padding: 0 0 16px 0;
  border-bottom: 1px solid var(--gn-color-gray-200);
  margin-bottom: 20px;
}

.gn-student-selection-modal__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--gn-color-gray-900);
  margin: 0 0 4px 0;
  font-family: var(--gn-font-family-heading, -apple-system, BlinkMacSystemFont, sans-serif);
}

.gn-student-selection-modal__subtitle {
  font-size: 14px;
  color: var(--gn-color-gray-600);
  margin: 0;
}

.gn-student-selection-modal__body {
  max-height: 400px;
  overflow-y: auto;
}

/* Student selection grid - reuse existing class-item styles within modal context */
.gn-student-selection-modal__body .gn-class-item {
  margin-bottom: 8px;
  border: 2px solid var(--gn-color-gray-200);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  background-color: var(--gn-color-white);
}

.gn-student-selection-modal__body .gn-class-item:hover {
  border-color: var(--gn-color-primary);
  background-color: rgba(2, 131, 194, 0.05);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.gn-student-selection-modal__body .gn-class-item:focus {
  outline: 2px solid var(--gn-color-primary);
  outline-offset: 2px;
}

/* Style adjustments for student items in modal */
.gn-student-selection-modal__body .gn-class-item__content {
  padding: 16px;
}

.gn-student-selection-modal__body .gn-class-item__info {
  flex: 1;
}

.gn-student-selection-modal__body .gn-class-item__name {
  font-size: 16px;
  font-weight: 500;
  color: var(--gn-color-gray-800);
  margin-bottom: 2px;
}

.gn-student-selection-modal__body .gn-class-item__percentage {
  font-size: 14px;
  color: var(--gn-color-gray-600);
}

.gn-student-selection-modal__body .gn-class-item__progress {
  margin: 8px 0 0 0;
}

.gn-student-selection-modal__body .gn-class-item__progress-bar {
  height: 6px;
  background-color: var(--gn-color-gray-200);
  border-radius: 3px;
  overflow: hidden;
}

.gn-student-selection-modal__body .gn-class-item__progress-fill {
  height: 100%;
  background-color: var(--gn-color-primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.gn-student-selection-modal__body .gn-class-item__status {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-left: 12px;
}

.gn-student-selection-modal__body .gn-class-item__arrow {
  color: var(--gn-color-gray-400);
  font-size: 16px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.gn-student-selection-modal__body .gn-class-item:hover .gn-class-item__arrow {
  color: var(--gn-color-primary);
  transform: translateX(2px);
}

/* Empty state */
.gn-student-selection-modal__empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--gn-color-gray-500);
}

.gn-student-selection-modal__empty h4 {
  margin: 0 0 8px 0;
  font-size: 16px;
  font-weight: 500;
}

.gn-student-selection-modal__empty p {
  margin: 0;
  font-size: 14px;
}

/* ==========================================================================
   STUDENT LEADERBOARD MODAL - ENHANCED STUDENT SELECTION WITH RANKING
   ========================================================================== */

/* Main Modal Container */
.gn-student-leaderboard-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1050; /* High z-index for modal */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.3s ease;
  /* Performance optimizations */
  contain: layout style paint;
  transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.gn-student-leaderboard-modal--visible {
  opacity: 1;
  visibility: visible;
}

/* Modal Overlay */
.gn-student-leaderboard-modal__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* Modal Container */
.gn-student-leaderboard-modal__container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  width: 90%;
  max-width: 700px;
  max-height: 85vh;
  background-color: var(--gn-color-white);
  border-radius: 16px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.gn-student-leaderboard-modal--visible .gn-student-leaderboard-modal__container {
  transform: translate(-50%, -50%) scale(1);
}

/* Modal Header */
.gn-student-leaderboard-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 32px;
  background: linear-gradient(135deg, var(--gn-color-primary) 0%, var(--gn-color-primary-dark) 100%);
  color: var(--gn-color-white);
  position: relative;
}

.gn-student-leaderboard-modal__header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
  animation: headerShine 3s infinite;
}

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

.gn-student-leaderboard-modal__title {
  font-size: 20px;
  font-weight: 700;
  font-family: 'Morn Bold', sans-serif;
  color: var(--gn-color-white);
  margin: 0;
  position: relative;
  z-index: 1;
}

.gn-student-leaderboard-modal__subtitle {
  font-size: 14px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.8);
  margin: 4px 0 0 0;
  position: relative;
  z-index: 1;
}

/* Close Button */
.gn-student-leaderboard-modal__close {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: var(--gn-color-white);
  cursor: pointer;
  padding: 12px;
  border-radius: 12px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  position: relative;
  z-index: 1;
}

.gn-student-leaderboard-modal__close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

.gn-student-leaderboard-modal__close:focus {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

.gn-student-leaderboard-modal__close:active {
  transform: scale(0.95);
}

/* Modal Content */
.gn-student-leaderboard-modal__content {
  padding: 32px;
  max-height: 60vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.gn-student-leaderboard-modal__content::-webkit-scrollbar {
  width: 6px;
}

.gn-student-leaderboard-modal__content::-webkit-scrollbar-track {
  background: var(--gn-color-gray-100);
  border-radius: 3px;
}

.gn-student-leaderboard-modal__content::-webkit-scrollbar-thumb {
  background: var(--gn-color-gray-300);
  border-radius: 3px;
}

.gn-student-leaderboard-modal__content::-webkit-scrollbar-thumb:hover {
  background: var(--gn-color-gray-400);
}

/* ==========================================================================
   STUDENT LEADERBOARD LIST
   ========================================================================== */

.gn-student-leaderboard-modal__students {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Individual Student Row */
.gn-student-leaderboard-modal__student {
  display: flex;
  align-items: center;
  padding: 20px;
  border: 2px solid var(--gn-color-gray-200);
  border-radius: 12px;
  cursor: pointer;
  background-color: var(--gn-color-white);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  /* Performance optimizations for smooth animations */
  transform: translateZ(0);
  backface-visibility: hidden;
  contain: layout style;
}

.gn-student-leaderboard-modal__student::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(2, 131, 194, 0.05), transparent);
  transition: left 0.5s ease;
}

.gn-student-leaderboard-modal__student:hover::before {
  left: 100%;
}

.gn-student-leaderboard-modal__student:hover {
  border-color: var(--gn-color-primary);
  background-color: var(--gn-color-primary-50);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px -8px rgba(2, 131, 194, 0.3);
}

.gn-student-leaderboard-modal__student:focus {
  outline: 2px solid var(--gn-color-primary);
  outline-offset: 2px;
  border-color: var(--gn-color-primary);
  background-color: var(--gn-color-primary-50);
}

.gn-student-leaderboard-modal__student:focus-visible {
  outline: 3px solid var(--gn-color-primary);
  outline-offset: 2px;
  border-color: var(--gn-color-primary);
  box-shadow: 0 0 0 5px rgba(2, 131, 194, 0.2);
}

.gn-student-leaderboard-modal__student:active {
  transform: translateY(0);
}

/* Top 3 Students Special Styling */
.gn-student-leaderboard-modal__student--top3 {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.1) 0%, rgba(2, 131, 194, 0.05) 100%);
  border-color: rgba(255, 215, 0, 0.3);
}

.gn-student-leaderboard-modal__student--top3:hover {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(2, 131, 194, 0.1) 100%);
  border-color: rgba(255, 215, 0, 0.5);
  box-shadow: 0 8px 25px -8px rgba(255, 215, 0, 0.4);
}

/* Ranking Display */
.gn-student-leaderboard-modal__rank {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  font-family: 'Morn Bold', sans-serif;
  margin-right: 16px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--gn-color-gray-100);
  color: var(--gn-color-gray-700);
  transition: all 0.2s ease;
}

.gn-student-leaderboard-modal__student:hover .gn-student-leaderboard-modal__rank {
  background: var(--gn-color-primary-light);
  color: var(--gn-color-primary);
  transform: scale(1.05);
}

/* Trophy Icon for Top 3 */
.gn-student-leaderboard-modal__trophy {
  font-size: 24px;
  background: linear-gradient(135deg, #ffd700 0%, #ffed4a 100%);
  border: 2px solid #f59e0b;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
  animation: trophyPulse 2s infinite;
}

@keyframes trophyPulse {
  0%, 100% { 
    transform: scale(1); 
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3); 
  }
  50% { 
    transform: scale(1.05); 
    box-shadow: 0 6px 16px rgba(245, 158, 11, 0.4); 
  }
}

/* Student Info Section */
.gn-student-leaderboard-modal__info {
  flex: 1;
  margin-right: 16px;
  min-width: 0;
}

.gn-student-leaderboard-modal__name {
  font-size: 16px;
  font-weight: 600;
  font-family: 'Morn Medium', sans-serif;
  color: var(--gn-color-gray-800);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gn-student-leaderboard-modal__class {
  font-size: 13px;
  color: var(--gn-color-gray-600);
  font-weight: 500;
}

/* Progress Bar Section */
.gn-student-leaderboard-modal__progress {
  flex: 2;
  margin-right: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.gn-student-leaderboard-modal__progress-label {
  font-size: 11px;
  color: var(--gn-color-gray-600);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.gn-student-leaderboard-modal__progress-bar {
  width: 100%;
  height: 12px;
  background-color: var(--gn-color-gray-200);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.gn-student-leaderboard-modal__progress-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--gn-color-primary) 0%, var(--gn-color-primary-dark) 100%);
  /* Performance optimization: GPU acceleration */
  transform: translateZ(0);
  backface-visibility: hidden;
  /* Will-change is set dynamically via JS for optimal performance */
}

.gn-student-leaderboard-modal__progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: progressShimmer 2s infinite;
}

@keyframes progressShimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Progress Fill Color Variants */
.gn-student-leaderboard-modal__progress-fill--excellent {
  background: linear-gradient(135deg, var(--gn-color-success) 0%, #059669 100%);
}

.gn-student-leaderboard-modal__progress-fill--good {
  background: linear-gradient(135deg, var(--gn-color-warning) 0%, #d97706 100%);
}

.gn-student-leaderboard-modal__progress-fill--average {
  background: linear-gradient(135deg, var(--gn-color-primary) 0%, var(--gn-color-primary-dark) 100%);
}

.gn-student-leaderboard-modal__progress-fill--poor {
  background: linear-gradient(135deg, var(--gn-color-danger) 0%, #dc2626 100%);
}

/* Percentage Display */
.gn-student-leaderboard-modal__percentage {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 60px;
}

.gn-student-leaderboard-modal__percentage-value {
  font-size: 20px;
  font-weight: 700;
  font-family: 'Morn Bold', sans-serif;
  color: var(--gn-color-gray-800);
  line-height: 1;
}

.gn-student-leaderboard-modal__percentage-label {
  font-size: 11px;
  color: var(--gn-color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
  margin-top: 2px;
}

/* Arrow Indicator */
.gn-student-leaderboard-modal__arrow {
  flex-shrink: 0;
  color: var(--gn-color-gray-400);
  margin-left: 12px;
  transition: all 0.2s ease;
  font-size: 16px;
}

.gn-student-leaderboard-modal__student:hover .gn-student-leaderboard-modal__arrow {
  color: var(--gn-color-primary);
  transform: translateX(4px);
}

/* ==========================================================================
   ACCESSIBILITY ENHANCEMENTS
   ========================================================================== */

/* High contrast mode support */
@media (prefers-contrast: high) {
  .gn-student-leaderboard-modal__student {
    border-width: 3px;
    border-color: #000;
  }
  
  .gn-student-leaderboard-modal__student:focus,
  .gn-student-leaderboard-modal__student:focus-visible {
    outline: 4px solid #000;
    border-color: #000;
    background-color: #fff;
  }
  
  .gn-student-leaderboard-modal__progress-fill {
    background: #000 !important;
  }
  
  .gn-student-leaderboard-modal__name {
    color: #000;
  }
  
  .gn-student-leaderboard-modal__percentage-value {
    color: #000;
  }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .gn-student-leaderboard-modal,
  .gn-student-leaderboard-modal__container,
  .gn-student-leaderboard-modal__student,
  .gn-student-leaderboard-modal__progress-fill,
  .gn-student-leaderboard-modal__rank,
  .gn-student-leaderboard-modal__arrow {
    transition: none !important;
    animation: none !important;
  }
  
  .gn-student-leaderboard-modal__student::before,
  .gn-student-leaderboard-modal__progress-fill::after {
    animation: none !important;
  }
  
  .gn-student-leaderboard-modal__trophy {
    animation: none !important;
  }
  
  @keyframes headerShine {
    0%, 100% { opacity: 0; }
  }
  
  @keyframes trophyPulse {
    0%, 100% { transform: scale(1); }
  }
  
  @keyframes progressShimmer {
    0%, 100% { left: -100%; }
  }
}

/* Focus management and keyboard navigation */
.gn-student-leaderboard-modal__content[role="main"]:focus {
  outline: 2px solid var(--gn-color-primary);
  outline-offset: -2px;
}

/* Enhanced focus ring for keyboard navigation */
.gn-student-leaderboard-modal__close:focus-visible {
  outline: 3px solid rgba(255, 255, 255, 0.8);
  outline-offset: 2px;
  box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.2);
}

/* List navigation enhancements */
.gn-student-leaderboard-list[role="list"]:focus {
  outline: 2px solid var(--gn-color-primary);
  outline-offset: -2px;
  background-color: rgba(2, 131, 194, 0.02);
}

/* Screen reader focus improvements */
.gn-student-leaderboard-modal [role="listitem"]:focus {
  z-index: 1;
  position: relative;
}

/* Progress bar accessibility */
.gn-student-leaderboard-modal__progress[role="progressbar"]:focus {
  outline: 2px solid var(--gn-color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ==========================================================================
   LEADERBOARD ITEM STYLES (matching PHP class names)
   ========================================================================== */

/* Map gn-student-leaderboard-item to existing modal student styles */
.gn-student-leaderboard-item {
  display: flex;
  align-items: center;
  padding: 20px;
  border: 2px solid var(--gn-color-gray-200);
  border-radius: 12px;
  cursor: pointer;
  background-color: var(--gn-color-white);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  margin-bottom: 12px;
}

.gn-student-leaderboard-item:hover {
  border-color: var(--gn-color-primary);
  background-color: var(--gn-color-primary-50);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px -8px rgba(2, 131, 194, 0.3);
}

.gn-student-leaderboard-item:focus,
.gn-student-leaderboard-item:focus-visible {
  outline: 3px solid var(--gn-color-primary);
  outline-offset: 2px;
  border-color: var(--gn-color-primary);
  box-shadow: 0 0 0 5px rgba(2, 131, 194, 0.2);
  z-index: 1;
  position: relative;
}

.gn-student-leaderboard-item--trophy {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.1) 0%, rgba(2, 131, 194, 0.05) 100%);
  border-color: rgba(255, 215, 0, 0.3);
}

.gn-student-leaderboard-item__rank {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  margin-right: 16px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--gn-color-gray-100);
  color: var(--gn-color-gray-700);
}

.gn-student-leaderboard-item__trophy {
  font-size: 24px;
  background: linear-gradient(135deg, #ffd700 0%, #ffed4a 100%);
  border: 2px solid #f59e0b;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.gn-student-leaderboard-item__rank-number {
  font-size: 18px;
  font-weight: 700;
  color: var(--gn-color-gray-700);
}

.gn-student-leaderboard-item__avatar {
  width: 40px;
  height: 40px;
  margin-right: 16px;
  flex-shrink: 0;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gn-color-gray-200);
}

.gn-student-leaderboard-item__avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gn-student-leaderboard-item__avatar-initials {
  font-size: 14px;
  font-weight: 600;
  color: var(--gn-color-gray-600);
}

.gn-student-leaderboard-item__info {
  flex: 1;
  margin-right: 16px;
  min-width: 0;
}

.gn-student-leaderboard-item__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--gn-color-gray-800);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gn-student-leaderboard-item__grade {
  font-size: 13px;
  color: var(--gn-color-gray-600);
  font-weight: 500;
}

.gn-student-leaderboard-item__performance {
  flex: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.gn-student-leaderboard-item__percentage {
  font-size: 18px;
  font-weight: 700;
  color: var(--gn-color-gray-800);
}

.gn-student-leaderboard-item__progress {
  width: 120px;
  height: 8px;
  background-color: var(--gn-color-gray-200);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.gn-student-leaderboard-item__progress-bar {
  width: 100%;
  height: 100%;
  position: relative;
}

.gn-student-leaderboard-item__progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  background: linear-gradient(135deg, var(--gn-color-primary) 0%, var(--gn-color-primary-dark) 100%);
}

/* High contrast support for leaderboard items */
@media (prefers-contrast: high) {
  .gn-student-leaderboard-item {
    border-width: 3px;
    border-color: #000;
  }
  
  .gn-student-leaderboard-item:focus,
  .gn-student-leaderboard-item:focus-visible {
    outline: 4px solid #000;
    border-color: #000;
    background-color: #fff;
  }
  
  .gn-student-leaderboard-item__progress-fill {
    background: #000 !important;
  }
  
  .gn-student-leaderboard-item__name,
  .gn-student-leaderboard-item__percentage {
    color: #000;
  }
}

/* Reduced motion for leaderboard items */
@media (prefers-reduced-motion: reduce) {
  .gn-student-leaderboard-item,
  .gn-student-leaderboard-item__progress-fill {
    transition: none !important;
  }
}

/* ==========================================================================
   EMPTY STATE
   ========================================================================== */

.gn-student-leaderboard-modal__empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--gn-color-gray-500);
}

.gn-student-leaderboard-modal__empty-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  opacity: 0.6;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gn-color-gray-400);
}

.gn-student-leaderboard-modal__empty-icon svg {
  width: 100%;
  height: 100%;
}

.gn-student-leaderboard-modal__empty-content {
  max-width: 320px;
  margin: 0 auto;
}

.gn-student-leaderboard-modal__empty-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--gn-color-gray-800);
  font-family: 'Morn Medium', sans-serif;
  line-height: 1.3;
}

.gn-student-leaderboard-modal__empty-text {
  font-size: 15px;
  line-height: 1.5;
  color: var(--gn-color-gray-600);
  font-family: 'Morn Regular', sans-serif;
}

/* ==========================================================================
   LOADING STATE
   ========================================================================== */

.gn-student-leaderboard-modal__loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  color: var(--gn-color-gray-500);
}

.gn-student-leaderboard-modal__loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--gn-color-gray-200);
  border-top: 4px solid var(--gn-color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 16px;
}

.gn-student-leaderboard-modal__loading-text {
  font-size: 14px;
  font-weight: 500;
  font-family: 'Morn Medium', sans-serif;
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

/* Tablet */
@media (max-width: 768px) {
  .gn-student-leaderboard-modal__container {
    width: 95%;
    max-width: none;
    margin: 20px;
    max-height: 90vh;
  }
  
  .gn-student-leaderboard-modal__header {
    padding: 20px 24px;
  }
  
  .gn-student-leaderboard-modal__title {
    font-size: 18px;
  }
  
  .gn-student-leaderboard-modal__content {
    padding: 24px;
  }
  
  .gn-student-leaderboard-modal__student {
    padding: 16px;
  }
  
  .gn-student-leaderboard-modal__rank,
  .gn-student-leaderboard-modal__trophy {
    width: 40px;
    height: 40px;
    margin-right: 12px;
  }
  
  .gn-student-leaderboard-modal__trophy {
    font-size: 20px;
  }
  
  .gn-student-leaderboard-modal__progress {
    flex: 1.5;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .gn-student-leaderboard-modal__container {
    width: 100%;
    height: 100%;
    max-height: 100vh;
    border-radius: 0;
    transform: translate(-50%, -50%);
    top: 50%;
    left: 50%;
  }
  
  .gn-student-leaderboard-modal--visible .gn-student-leaderboard-modal__container {
    transform: translate(-50%, -50%);
  }
  
  .gn-student-leaderboard-modal__header {
    padding: 16px 20px;
  }
  
  .gn-student-leaderboard-modal__title {
    font-size: 16px;
  }
  
  .gn-student-leaderboard-modal__subtitle {
    font-size: 13px;
  }
  
  .gn-student-leaderboard-modal__content {
    padding: 20px;
    max-height: calc(100vh - 120px);
  }
  
  .gn-student-leaderboard-modal__student {
    padding: 16px 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .gn-student-leaderboard-modal__student-top {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  
  .gn-student-leaderboard-modal__rank,
  .gn-student-leaderboard-modal__trophy {
    width: 36px;
    height: 36px;
    margin-right: 0;
    flex-shrink: 0;
  }
  
  .gn-student-leaderboard-modal__trophy {
    font-size: 18px;
  }
  
  .gn-student-leaderboard-modal__info {
    flex: 1;
    margin-right: 0;
  }
  
  .gn-student-leaderboard-modal__progress {
    flex: none;
    margin-right: 0;
    order: 2;
  }
  
  .gn-student-leaderboard-modal__percentage {
    position: absolute;
    top: 16px;
    right: 16px;
    align-items: flex-end;
    min-width: auto;
  }
  
  .gn-student-leaderboard-modal__percentage-value {
    font-size: 18px;
  }
  
  .gn-student-leaderboard-modal__arrow {
    display: none;
  }
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .gn-student-leaderboard-modal,
  .gn-student-leaderboard-modal__container,
  .gn-student-leaderboard-modal__student,
  .gn-student-leaderboard-modal__progress-fill,
  .gn-student-leaderboard-modal__arrow,
  .gn-student-leaderboard-modal__close,
  .gn-student-leaderboard-modal__rank,
  .gn-student-leaderboard-modal__trophy {
    transition: none;
    animation: none;
  }
  
  .gn-student-leaderboard-modal__student::before,
  .gn-student-leaderboard-modal__progress-fill::after,
  .gn-student-leaderboard-modal__header::before {
    animation: none;
  }
}

/* High Contrast */
@media (prefers-contrast: high) {
  .gn-student-leaderboard-modal__overlay {
    background-color: rgba(0, 0, 0, 0.8);
  }
  
  .gn-student-leaderboard-modal__student {
    border-width: 3px;
  }
  
  .gn-student-leaderboard-modal__student:hover {
    border-width: 4px;
  }
  
  .gn-student-leaderboard-modal__progress-bar {
    border: 1px solid var(--gn-color-gray-400);
  }
}

/* Focus Visible */
.gn-student-leaderboard-modal__student:focus-visible {
  outline: 3px solid var(--gn-color-primary);
  outline-offset: 2px;
}

.gn-student-leaderboard-modal__close:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.8);
  outline-offset: 2px;
}