/**
 * NeuroLearn - Animations et Styles Globaux
 * Animations fluides et professionnelles pour toute la plateforme
 */

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

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

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

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

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

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

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

/* ============================================
   CLASSES UTILITAIRES D'ANIMATION
   ============================================ */

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

.animate-slide-in-right {
  animation: slideInFromRight 0.5s ease-out;
}

.animate-slide-in-left {
  animation: slideInFromLeft 0.5s ease-out;
}

.animate-scale-in {
  animation: scaleIn 0.3s ease-out;
}

.animate-bounce {
  animation: bounce 1s ease-in-out infinite;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* Animation delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* ============================================
   TRANSITIONS DOUCES
   ============================================ */

.smooth-transition {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.smooth-transition-fast {
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

.smooth-transition-slow {
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   EFFETS DE HOVER
   ============================================ */

.hover-lift {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.hover-glow {
  transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
}

.hover-scale {
  transition: transform 0.3s ease;
}

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

.hover-rotate {
  transition: transform 0.3s ease;
}

.hover-rotate:hover {
  transform: rotate(5deg);
}

/* ============================================
   CARDS ET CONTENEURS
   ============================================ */

.glass-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.gradient-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.gradient-card-blue {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  color: white;
}

.gradient-card-green {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  color: white;
}

.gradient-card-orange {
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  color: white;
}

.gradient-card-red {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
}

/* ============================================
   BADGES ET LABELS
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.025em;
}

.badge-success {
  background-color: #10b981;
  color: white;
}

.badge-warning {
  background-color: #f59e0b;
  color: white;
}

.badge-error {
  background-color: #ef4444;
  color: white;
}

.badge-info {
  background-color: #3b82f6;
  color: white;
}

.badge-premium {
  background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
  color: #7c3aed;
  font-weight: bold;
}

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

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  color: #374151;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.btn-success {
  background: linear-gradient(135deg, #10b981 0%, #34d399 100%);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(16, 185, 129, 0.4);
}

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

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-top-color: #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-dots {
  display: flex;
  gap: 0.5rem;
}

.loading-dots span {
  width: 8px;
  height: 8px;
  background-color: #667eea;
  border-radius: 50%;
  animation: bounce 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

.skeleton {
  background: linear-gradient(
    90deg,
    #f0f0f0 25%,
    #e0e0e0 50%,
    #f0f0f0 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 0.5rem;
}

/* ============================================
   PROGRESS BARS
   ============================================ */

.progress-bar-container {
  width: 100%;
  height: 8px;
  background-color: #e5e7eb;
  border-radius: 9999px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  transition: width 0.5s ease;
  position: relative;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: shimmer 2s infinite;
}

/* ============================================
   TOOLTIPS
   ============================================ */

.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltip-text {
  visibility: hidden;
  background-color: #1f2937;
  color: white;
  text-align: center;
  border-radius: 0.5rem;
  padding: 0.5rem 1rem;
  position: absolute;
  z-index: 1000;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.3s, visibility 0.3s;
  white-space: nowrap;
  font-size: 0.875rem;
}

.tooltip:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
}

/* ============================================
   MODALS AMÉLIORÉES
   ============================================ */

.modal-backdrop {
  backdrop-filter: blur(4px);
  animation: fadeIn 0.3s ease-out;
}

.modal-content {
  animation: scaleIn 0.3s ease-out;
  max-height: 90vh;
  overflow-y: auto;
}

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

@media (max-width: 768px) {
  .hover-lift:hover {
    transform: translateY(-4px);
  }
  
  .btn-primary,
  .btn-secondary,
  .btn-success {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
  }
}

/* ============================================
   DARK MODE SUPPORT (Optional)
   ============================================ */

@media (prefers-color-scheme: dark) {
  .glass-card {
    background: rgba(30, 41, 59, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }
}

/* ============================================
   ACCESSIBILITÉ
   ============================================ */

.focus-visible:focus {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   SCROLLBAR PERSONNALISÉE
   ============================================ */

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

/* ============================================
   UTILITAIRES
   ============================================ */

.text-gradient {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-blue {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.shadow-soft {
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.shadow-hard {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.border-gradient {
  border: 2px solid transparent;
  background: linear-gradient(white, white) padding-box,
              linear-gradient(135deg, #667eea, #764ba2) border-box;
}