/* ======================================
   COMPOSANTS DEEPNOTES
   ====================================== */

/* ======================================
   BOUTONS
   ====================================== */

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

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-on-surface);
  border-color: var(--color-border);
}

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

.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 var(--transition-normal);
}

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

/* ======================================
   CARTES
   ====================================== */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-large);
  box-shadow: var(--box-shadow);
  transition: all var(--transition-fast);
  overflow: hidden;
}

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

/* 3D Card effect (inspired by @css_3D_card, adapted to theme) */
.content-grid,
.groups-grid,
.dashboard-stats {
  perspective: 1000px;
  perspective-origin: 50% 50%;
}

/* Apply 3D to common card types without changing HTML */
.group-card,
.stat-card,
.content-item,
.feature-card,
.card.card-3d {
  transform-style: preserve-3d;
  transition: transform 0.5s ease, box-shadow 0.5s ease, background-position 0.6s ease;
  background-image: linear-gradient(135deg, #0000 18.75%, rgba(255,255,255,0.05) 0 31.25%, #0000 0),
                    repeating-linear-gradient(45deg, rgba(255,255,255,0.05) -6.25% 6.25%, rgba(255,255,255,0.08) 0 18.75%);
  background-size: 60px 60px;
  background-position: 0 0, 0 0;
}

.group-card:hover,
.stat-card:hover,
.content-item:hover,
.feature-card:hover,
.card.card-3d:hover {
  background-position: -100px 100px, -100px 100px;
  transform: rotate3d(0.5, 1, 0, 18deg) translateY(-4px);
  box-shadow: 0 30px 30px -10px rgba(0, 0, 0, 0.25);
}

/* Lift key texts/buttons slightly in 3D */
.group-card .group-name,
.stat-card .stat-number,
.content-item .content-item-title,
.card .card-title {
  transform: translateZ(30px);
  transition: transform 0.5s ease;
}

.group-card:hover .group-name,
.stat-card:hover .stat-number,
.content-item:hover .content-item-title,
.card.card-3d:hover .card-title {
  transform: translateZ(45px);
}

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-alt);
}

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

.card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-alt);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-on-surface);
}

/* ======================================
   NOTIFICATIONS (TOASTS)
   ====================================== */

.toast-container {
  position: fixed;
  top: 100px;
  right: var(--spacing-lg);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 400px;
}

.toast {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow-large);
  padding: var(--spacing-md);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  transform: translateX(100%);
  opacity: 0;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

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

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

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

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

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.75rem;
}

.toast.success .toast-icon {
  background: var(--color-success);
  color: white;
}

.toast.error .toast-icon {
  background: var(--color-error);
  color: white;
}

.toast.warning .toast-icon {
  background: var(--color-warning);
  color: white;
}

.toast.info .toast-icon {
  background: var(--color-info);
  color: white;
}

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

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

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

.toast-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.toast-close:hover {
  background: var(--color-surface-alt);
  color: var(--color-text-on-surface);
}

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--color-border);
  width: 100%;
  transform: scaleX(1);
  transform-origin: left;
  animation: toast-progress 5s linear forwards;
}

.toast.success .toast-progress {
  background: var(--color-success);
}

.toast.error .toast-progress {
  background: var(--color-error);
}

.toast.warning .toast-progress {
  background: var(--color-warning);
}

.toast.info .toast-progress {
  background: var(--color-info);
}

@keyframes toast-progress {
  from {
    transform: scaleX(1);
  }
  to {
    transform: scaleX(0);
  }
}

/* ======================================
   DASHBOARD
   ====================================== */

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

.dashboard-header h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-on-surface);
}

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  perspective: 1000px;
  perspective-origin: 50% 50%;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: transform 0.5s ease, box-shadow 0.5s ease, background-position 0.6s ease, width 0.3s ease;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  background-image: linear-gradient(135deg, transparent 18.75%, rgba(255,255,255,0.03) 0 31.25%, transparent 0),
                    repeating-linear-gradient(45deg, rgba(255,255,255,0.03) -6.25% 6.25%, rgba(255,255,255,0.05) 0 18.75%);
  background-size: 60px 60px;
  background-position: 0 0, 0 0;
  background-color: var(--color-surface);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-button);
  transition: width var(--transition-fast);
}

.stat-card:hover::before {
  width: 8px;
}

.stat-card:hover {
  background-position: -100px 100px, -100px 100px;
  transform: rotate3d(0.5, 1, 0, 18deg) translateY(-4px);
  box-shadow: 0 30px 30px -10px rgba(0, 0, 0, 0.25);
}

.stat-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-button), var(--color-accent));
  border-radius: var(--border-radius);
  color: var(--color-button-text);
  font-size: 1.5rem;
}

.stat-content {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-on-surface);
  line-height: 1;
  transform: translateZ(30px);
  transition: transform 0.5s ease;
}

.stat-card:hover .stat-number {
  transform: translateZ(45px);
}

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

/* ======================================
   ONGLETS
   ====================================== */

.content-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--color-text-on-surface);
}

.tab-btn.active {
  color: var(--color-button);
  border-bottom-color: var(--color-button);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  perspective: 1000px;
  perspective-origin: 50% 50%;
}

/* ======================================
   CONTENUS DYNAMIQUES
   ====================================== */

.content-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-lg);
  transition: transform 0.5s ease, box-shadow 0.5s ease, background-position 0.6s ease;
  position: relative;
  transform-style: preserve-3d;
  background-image: linear-gradient(135deg, transparent 18.75%, rgba(255,255,255,0.03) 0 31.25%, transparent 0),
                    repeating-linear-gradient(45deg, rgba(255,255,255,0.03) -6.25% 6.25%, rgba(255,255,255,0.05) 0 18.75%);
  background-size: 60px 60px;
  background-position: 0 0, 0 0;
  background-color: var(--color-surface);
}

.content-item:hover {
  background-position: -100px 100px, -100px 100px;
  transform: rotate3d(0.5, 1, 0, 18deg) translateY(-4px);
  box-shadow: 0 30px 30px -10px rgba(0, 0, 0, 0.25);
}

.content-item-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.content-item-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.content-item-icon.quiz {
  background: linear-gradient(135deg, var(--color-info), #0dcaf0);
  color: white;
}

.content-item-icon.notes {
  background: linear-gradient(135deg, var(--color-warning), #fd7e14);
  color: white;
}

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

.content-item-title {
  font-weight: 600;
  color: var(--color-text-on-surface);
  margin-bottom: var(--spacing-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transform: translateZ(30px);
  transition: transform 0.5s ease;
}

.content-item:hover .content-item-title {
  transform: translateZ(45px);
}

.content-item-date {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.content-item-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.content-item-actions .btn {
  flex: 1;
  justify-content: center;
}

/* ======================================
   GROUPES
   ====================================== */

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

.groups-header h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-on-surface);
}

.groups-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.group-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-lg);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

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

.group-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--box-shadow-large);
}

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

.group-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-on-surface);
}

.group-members-count {
  background: var(--color-surface-alt);
  color: var(--color-text-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.75rem;
}

.group-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.group-stats {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

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

.group-stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-on-surface);
}

.group-stat-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

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

.group-actions .btn {
  flex: 1;
  justify-content: center;
}

/* ======================================
   FORMULAIRES
   ====================================== */

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--color-text-on-surface);
}

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

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

select.form-control {
  cursor: pointer;
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.radio-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  color: var(--color-text-on-surface);
}

.radio-option input[type="radio"] {
  display: none;
}

.radio-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  position: relative;
  transition: all var(--transition-fast);
}

.radio-option input[type="radio"]:checked + .radio-custom {
  border-color: var(--color-button);
}

.radio-option input[type="radio"]:checked + .radio-custom::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  background: var(--color-button);
  border-radius: 50%;
}

/* ======================================
   ÉTATS VIDES
   ====================================== */

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

.empty-state-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.5;
}

.empty-state-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-on-surface);
}

.empty-state-text {
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

/* ======================================
   ANIMATIONS
   ====================================== */

.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

.slide-up {
  animation: slideUp 0.3s ease-out;
}

.bounce-in {
  animation: bounceIn 0.6s ease-out;
}

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

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

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Loading states */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  animation: loading 1.5s infinite;
}

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