/* ===================================
   MEMORISTE - DESIGN SYSTEM
   ================================= */

/* Variables CSS - Design System */
:root {
  /* Couleurs principales - Palette violette */
  --primary-color: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  
  /* Couleurs secondaires */
  --secondary-color: #8b5cf6;
  --secondary-light: #a78bfa;
  --secondary-dark: #7c3aed;
  
  /* Couleurs neutres */
  --white: #ffffff;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #6c757d;
  --gray-600: #495057;
  --gray-700: #343a40;
  --gray-800: #212529;
  
  /* Couleurs d'accent */
  --accent-color: #e74c3c;
  --success-color: #27ae60;
  --warning-color: #f39c12;
  
  /* Typographie */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-secondary: 'Georgia', serif;
  
  /* Tailles de police */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* Épaisseurs de police */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Espacements */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Alias pour compatibilité */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Rayons de bordure */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  --border-radius-full: 9999px;
  
  /* Alias pour compatibilité */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, 
    rgba(147, 51, 234, 0.1) 0%, 
    rgba(99, 102, 241, 0.05) 50%, 
    rgba(139, 92, 246, 0.1) 100%);
  --gradient-button: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  
  /* Ombres */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Animations */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-spring: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ===================================
   RESET ET BASE
   ================================= */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: 1.6;
  color: var(--gray-700);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   TYPOGRAPHIE
   ================================= */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--primary-color);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-md);
  color: var(--gray-600);
}

a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: all var(--transition-fast);
}

a:hover {
  color: var(--secondary-dark);
  text-decoration: underline;
}

/* ===================================
   LAYOUT ET GRID
   ================================= */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-sm {
  max-width: 768px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-3xl) 0;
}

.section-sm {
  padding: var(--space-2xl) 0;
}

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



/* ===================================
   PAGE DE LOGIN MINIMALISTE
   ================================= */

.login-page {
  background: linear-gradient(135deg, 
    rgba(147, 51, 234, 0.1) 0%, 
    rgba(99, 102, 241, 0.05) 50%, 
    rgba(139, 92, 246, 0.1) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.login-container {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}

.login-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: var(--space-3xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 
    0 25px 50px -12px rgba(139, 92, 246, 0.25),
    0 0 0 1px rgba(139, 92, 246, 0.05);
}

.login-header {
  margin-bottom: var(--space-3xl);
}

.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

.brain-logo {
  font-size: 3.5rem;
  /* Pas d'animation ici, sera gérée par .animate-bounce */
}

.app-name {
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--gray-700);
  margin: 0;
  font-family: var(--font-primary);
  letter-spacing: -0.025em;
  /* Pas d'animation ici, sera gérée par .animate-slide-in */
}

.login-form {
  margin-bottom: var(--space-xl);
}

.input-group {
  margin-bottom: var(--space-xl);
}

.minimal-input {
  width: 100%;
  min-width: 320px;
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--text-base);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  outline: none;
}

.minimal-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  background: rgba(255, 255, 255, 0.8);
}

.minimal-input::placeholder {
  color: var(--gray-500);
}

.minimal-btn {
  width: 100%;
  min-width: 320px;
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--text-base);
  font-weight: 600;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  outline: none;
}

.minimal-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
}

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

.minimal-btn-outline {
  width: 100%;
  padding: var(--space-md);
  font-size: var(--text-sm);
  font-weight: 500;
  background: transparent;
  color: var(--gray-600);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  outline: none;
  margin-top: var(--space-sm);
}

.minimal-btn-outline:hover {
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary-color);
}

/* État utilisateur connecté */
.user-connected {
  text-align: center;
  width: 100%;
}

.login-user-info {
  padding: var(--space-lg) 0;
  width: 100%;
}

.login-user-email {
  color: var(--gray-700);
  margin-bottom: var(--space-lg);
  font-weight: 500;
  font-size: var(--text-base);
  word-break: break-word;
}

.user-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  width: 100%;
}

.user-actions .minimal-btn {
  width: 100%;
}

.user-actions .minimal-btn-outline {
  width: 100%;
}

/* Footer minimal */
.footer {
  text-align: center;
  margin-top: var(--space-2xl);
}

.footer p {
  color: var(--gray-500);
  font-size: var(--text-xs);
  margin: 0;
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 480px) {
  .login-page {
    padding: var(--space-md);
  }
  
  .login-card {
    padding: var(--space-2xl);
  }
  
  .login-container {
    max-width: 100%;
  }
  
  .minimal-input,
  .minimal-btn {
    min-width: auto;
    padding: var(--space-lg) var(--space-md);
  }
  
  .brand {
    gap: var(--space-sm);
  }
  
  .brain-logo {
    font-size: 3rem;
  }
  
  .app-name {
    font-size: var(--text-xl);
  }
}

/* ===================================
   PAGE PRINCIPALE DE L'APP
   ================================= */

.app-page {
  background: linear-gradient(135deg, 
    rgba(147, 51, 234, 0.02) 0%, 
    rgba(99, 102, 241, 0.01) 50%, 
    rgba(139, 92, 246, 0.02) 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(139, 92, 246, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-md);
}

.app-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  color: var(--gray-600);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
}

.nav-link:hover {
  color: var(--primary-color);
  background: rgba(139, 92, 246, 0.1);
}

.app-header .user-info {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(139, 92, 246, 0.1);
  border-radius: 16px;
  padding: var(--space-md) var(--space-lg);
}

.app-header .user-email {
  color: var(--primary-color);
  font-size: var(--text-sm);
  font-weight: 600;
  min-width: 120px;
}

.logout-btn {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  padding: var(--space-sm) var(--space-md);
  border-radius: 12px;
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

.logout-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

/* Main content */
.app-main {
  flex: 1;
  padding: var(--space-xl) 0;
}

/* ===================================
   LANDING PAGE
   ================================= */

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  padding: var(--space-3xl) 0;
}

.hero-content {
  max-width: 500px;
}

.hero-title {
  font-size: var(--text-4xl);
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--space-lg);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--gray-600);
  margin-bottom: var(--space-2xl);
  line-height: 1.6;
}

.hero-actions {
  margin-bottom: var(--space-2xl);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-2xl);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  text-decoration: none;
  border-radius: 16px;
  font-weight: 600;
  font-size: var(--text-base);
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.6);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.feature-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: var(--space-2xl);
  border: 1px solid rgba(139, 92, 246, 0.2);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.15);
  transform: rotate(-5deg);
  animation: subtleFloat 5s ease-in-out infinite;
}

.card-front h4 {
  color: var(--gray-700);
  font-size: var(--text-lg);
  margin: 0;
  text-align: center;
}

.features {
  padding: var(--space-3xl) 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

.feature-item {
  text-align: center;
  padding: var(--space-2xl);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  border: 1px solid rgba(139, 92, 246, 0.1);
  transition: all 0.3s ease;
}

.feature-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.15);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-lg);
}

.feature-item h3 {
  color: var(--primary-color);
  margin-bottom: var(--space-md);
  font-size: var(--text-xl);
}

.feature-item p {
  color: var(--gray-600);
  line-height: 1.6;
}

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

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

.stat-item {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  padding: var(--space-xl);
  text-align: center;
  border: 1px solid rgba(139, 92, 246, 0.1);
  transition: all 0.3s ease, transform 0.15s ease, opacity 0.1s ease;
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(139, 92, 246, 0.3);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.2);
  transform: translateY(-2px);
}

.stat-number {
  display: block;
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--space-xs);
}

.stat-label {
  color: var(--gray-600);
  font-size: var(--text-sm);
  font-weight: 500;
}

/* Sélection de decks avec modes */
.deck-selection-section {
  margin-bottom: var(--space-3xl);
}

.deck-selection-section h3 {
  color: var(--primary-color);
  text-align: center;
  margin-bottom: var(--space-2xl);
  font-size: var(--text-2xl);
  font-weight: 600;
}

.deck-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
}

.action-btn {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-xl);
  border: none;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: left;
  min-height: 100px;
}

.action-btn.primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.action-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.6);
}

.action-btn.secondary {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: var(--gray-700);
}

.action-btn.secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.2);
  background: rgba(255, 255, 255, 0.9);
}

.btn-icon {
  font-size: var(--text-2xl);
}

.btn-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.btn-title {
  font-size: var(--text-lg);
  font-weight: 600;
}

.btn-subtitle {
  font-size: var(--text-sm);
  opacity: 0.8;
}

.recent-section {
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: var(--space-xl);
  border: 1px solid rgba(139, 92, 246, 0.1);
}

.recent-section h3 {
  color: var(--primary-color);
  margin-bottom: var(--space-lg);
  font-size: var(--text-xl);
}

.decks-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.deck-preview {
  background: rgba(255, 255, 255, 0.8);
  border-radius: 16px;
  padding: var(--space-xl);
  border: 1px solid rgba(139, 92, 246, 0.1);
  transition: all 0.3s ease;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.deck-preview:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.2);
  background: rgba(255, 255, 255, 0.95);
}

.deck-preview-icon {
  font-size: 2.5rem;
  min-width: 60px;
  text-align: center;
}

.deck-preview-content {
  flex: 1;
}

.deck-preview-name {
  color: var(--primary-color);
  font-weight: 600;
  font-size: var(--text-lg);
  margin-bottom: var(--space-xs);
}

.deck-preview-meta {
  color: var(--gray-600);
  font-size: var(--text-sm);
  margin-bottom: var(--space-md);
}

.deck-preview-progress {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.progress-bar-mini {
  background: rgba(139, 92, 246, 0.1);
  border-radius: 50px;
  height: 6px;
  width: 100px;
  overflow: hidden;
}

.progress-fill-mini {
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  height: 100%;
  border-radius: 50px;
  transition: width 0.3s ease;
}

.progress-text-mini {
  color: var(--gray-600);
  font-size: var(--text-xs);
  font-weight: 500;
  min-width: 80px;
}

.deck-preview-action {
  font-size: 1.5rem;
  color: var(--primary-color);
  min-width: 30px;
  text-align: center;
}

/* Deck Cards avec modes intégrés */
.deck-card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 20px;
  padding: var(--space-2xl);
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.1);
}

.deck-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(139, 92, 246, 0.2);
  background: rgba(255, 255, 255, 0.95);
}

.deck-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.deck-card-icon {
  font-size: 3rem;
  min-width: 60px;
  text-align: center;
}

.deck-card-info {
  flex: 1;
}

.deck-card-info h4 {
  color: var(--primary-color);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.deck-card-info p {
  color: var(--gray-600);
  font-size: var(--text-sm);
  margin-bottom: var(--space-lg);
}

.deck-progress {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.deck-card-modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.mode-btn-mini {
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary-color);
  border: 1px solid rgba(139, 92, 246, 0.2);
  padding: var(--space-md) var(--space-sm);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: center;
}

.mode-btn-mini:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

/* ===================================
   MODAL AJOUTER CARTE
   ================================= */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  width: 90%;
  max-width: 500px;
  border: 1px solid rgba(139, 92, 246, 0.2);
  box-shadow: 0 25px 50px rgba(139, 92, 246, 0.3);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xl);
  border-bottom: 1px solid rgba(139, 92, 246, 0.1);
}

.modal-header h3 {
  color: var(--primary-color);
  margin: 0;
  font-size: var(--text-xl);
}

.close-btn {
  background: none;
  border: none;
  font-size: var(--text-2xl);
  color: var(--gray-500);
  cursor: pointer;
  transition: color 0.3s ease;
}

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

.modal-body {
  padding: var(--space-xl);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--gray-700);
  font-weight: 500;
}

.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.8);
  resize: vertical;
  font-family: var(--font-primary);
  font-size: var(--text-base);
  transition: all 0.3s ease;
}

.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
  margin-top: var(--space-xl);
}

.btn-cancel {
  padding: var(--space-md) var(--space-lg);
  background: transparent;
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: var(--gray-600);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-cancel:hover {
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary-color);
}

.btn-save {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

.btn-save:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* Footer */
.app-footer {
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(139, 92, 246, 0.1);
  padding: var(--space-lg) 0;
  margin-top: auto;
}

.app-footer .container {
  text-align: center;
}

.app-footer p {
  color: var(--gray-500);
  font-size: var(--text-xs);
  margin: 0;
  opacity: 0.7;
}

/* ===================================
   RESPONSIVE POUR L'APP
   ================================= */

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .main-actions {
    grid-template-columns: 1fr;
  }
  
  .main-actions .action-btn.primary {
    grid-column: 1 / -1;
  }
  
  .app-header .container {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .user-info {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

@media (max-width: 480px) {
  .app-main {
    padding: var(--space-lg) 0;
  }
  
  .hero-title {
    font-size: var(--text-2xl);
  }
  
  .cta-btn {
    padding: var(--space-md) var(--space-lg);
  }
  
  .modal-content {
    width: 95%;
    margin: var(--space-md);
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .stats-bar {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .stat-item {
    padding: var(--space-lg);
  }
  
  .stat-number {
    font-size: var(--text-2xl);
  }
  
  .btn-cancel,
  .btn-save {
    width: 100%;
    justify-content: center;
  }
}

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

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

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

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

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

@media (max-width: 768px) {
  :root {
    --text-5xl: 2.5rem;
    --text-4xl: 2rem;
    --text-3xl: 1.5rem;
  }
  
  .container {
    padding: 0 var(--space-sm);
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .navbar {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .nav-menu {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .btn {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--text-4xl);
  }
  
  .hero-subtitle {
    font-size: var(--text-lg);
  }
}

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

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes gentleEntry {
  0% {
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes subtleFloat {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-3px);
  }
}

@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Nouvelles animations élégantes et fluides */
@keyframes elegantFloat1 {
  0%, 100% {
    transform: translateY(0px) translateX(0px) rotate(0deg) scale(1);
  }
  25% {
    transform: translateY(-20px) translateX(10px) rotate(2deg) scale(1.02);
  }
  50% {
    transform: translateY(-15px) translateX(-5px) rotate(-1deg) scale(0.98);
  }
  75% {
    transform: translateY(-25px) translateX(8px) rotate(1.5deg) scale(1.01);
  }
}

@keyframes elegantFloat2 {
  0%, 100% {
    transform: translateY(0px) translateX(0px) rotate(0deg) scale(1);
  }
  20% {
    transform: translateY(-18px) translateX(-8px) rotate(-1.5deg) scale(1.01);
  }
  40% {
    transform: translateY(-12px) translateX(12px) rotate(2deg) scale(0.99);
  }
  60% {
    transform: translateY(-22px) translateX(-6px) rotate(-0.5deg) scale(1.02);
  }
  80% {
    transform: translateY(-16px) translateX(4px) rotate(1deg) scale(0.98);
  }
}

@keyframes elegantFloat3 {
  0%, 100% {
    transform: translateY(0px) translateX(0px) rotate(0deg) scale(1);
  }
  30% {
    transform: translateY(-24px) translateX(-10px) rotate(-2deg) scale(1.03);
  }
  60% {
    transform: translateY(-14px) translateX(8px) rotate(1.5deg) scale(0.97);
  }
  90% {
    transform: translateY(-19px) translateX(-4px) rotate(-0.8deg) scale(1.01);
  }
}

@keyframes elegantFloat4 {
  0%, 100% {
    transform: translateY(0px) translateX(0px) rotate(0deg) scale(1);
  }
  15% {
    transform: translateY(-16px) translateX(6px) rotate(1.2deg) scale(1.01);
  }
  35% {
    transform: translateY(-28px) translateX(-12px) rotate(-1.8deg) scale(1.04);
  }
  55% {
    transform: translateY(-11px) translateX(9px) rotate(2.2deg) scale(0.96);
  }
  75% {
    transform: translateY(-21px) translateX(-3px) rotate(-0.6deg) scale(1.02);
  }
  95% {
    transform: translateY(-8px) translateX(5px) rotate(0.9deg) scale(0.99);
  }
}

@keyframes elegantFloat5 {
  0%, 100% {
    transform: translateY(0px) translateX(0px) rotate(0deg) scale(1);
  }
  12% {
    transform: translateY(-26px) translateX(-7px) rotate(-1.4deg) scale(1.02);
  }
  28% {
    transform: translateY(-13px) translateX(11px) rotate(2.1deg) scale(0.98);
  }
  44% {
    transform: translateY(-31px) translateX(-9px) rotate(-0.7deg) scale(1.05);
  }
  60% {
    transform: translateY(-17px) translateX(6px) rotate(1.6deg) scale(0.97);
  }
  76% {
    transform: translateY(-23px) translateX(-2px) rotate(-1.1deg) scale(1.01);
  }
  92% {
    transform: translateY(-9px) translateX(4px) rotate(0.5deg) scale(0.99);
  }
}

/* Classes d'animation */

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* ===================================
   STYLES POUR LA PAGE DE RÉVISION
   ================================= */

.review-page {
    background: linear-gradient(135deg, 
        rgba(147, 51, 234, 0.1) 0%, 
        rgba(99, 102, 241, 0.05) 50%, 
        rgba(139, 92, 246, 0.1) 100%);
    min-height: 100vh;
}

.review-main {
    padding: var(--space-md) 0;
    min-height: calc(100vh - 140px);
}

/* Sélection des decks */
.deck-selection {
    text-align: center;
}

.deck-selection h2 {
    color: var(--primary-color);
    margin-bottom: var(--space-3xl);
    font-size: var(--text-4xl);
    font-weight: 600;
}

.deck-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.deck-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 20px;
    padding: var(--space-2xl);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.deck-card:hover,
.deck-card.selected {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(139, 92, 246, 0.3);
}

.deck-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
}

.deck-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
    font-size: var(--text-xl);
    font-weight: 600;
}

.deck-card p {
    color: var(--gray-600);
    margin-bottom: var(--space-lg);
    font-size: var(--text-sm);
}

.deck-stats {
    background: rgba(139, 92, 246, 0.1);
    color: var(--primary-color);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 12px;
    font-size: var(--text-xs);
    font-weight: 600;
}

/* Sélection des modes */
.mode-selection {
    margin-top: var(--space-3xl);
    animation: fadeInUp 0.5s ease;
}

.mode-selection h3 {
    color: var(--primary-color);
    margin-bottom: var(--space-xl);
    font-size: var(--text-2xl);
    font-weight: 600;
}

.mode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.mode-btn {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 16px;
    padding: var(--space-xl);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    color: var(--gray-700);
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.2);
}

.mode-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
}

.mode-btn h4 {
    margin-bottom: var(--space-xs);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--primary-color);
}

.mode-btn p {
    font-size: var(--text-sm);
    color: var(--gray-600);
    margin: 0;
}

/* Session de révision */
.review-session {
    max-width: 800px;
    margin: 0 auto;
}

/* Info deck compacte */
/* Mise à jour pour intégrer le bouton d'aide */

.deck-info-icon {
    font-size: var(--text-2xl);
    min-width: 3rem;
}

.deck-info-content h3 {
    color: var(--primary-color);
    font-size: var(--text-lg);
    font-weight: 600;
    margin: 0 0 var(--space-xs) 0;
}

.deck-info-content p {
    color: var(--gray-600);
    font-size: var(--text-sm);
    margin: 0;
}

.progress-bar {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    height: 6px;
    margin-bottom: var(--space-md);
    position: relative;
    overflow: hidden;
}

.progress-fill {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    height: 100%;
    border-radius: 50px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    text-align: center;
    color: var(--primary-color);
    margin-top: var(--space-sm);
    font-weight: 600;
}

.review-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 16px;
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.12);
}

.card-content {
    width: 100%;
    text-align: center;
}

/* Images dans les cartes */
.card-image {
    max-width: 200px;
    max-height: 150px;
    width: auto;
    height: auto;
    border-radius: 8px;
    margin-bottom: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    object-fit: contain;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.card-text {
    margin-top: 8px;
    font-size: 1.2rem;
    font-weight: 500;
}

.mode-content h3 {
    color: var(--primary-color);
    font-size: var(--text-lg);
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.reveal-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: var(--space-lg) var(--space-2xl);
    border-radius: 16px;
    cursor: pointer;
    font-size: var(--text-base);
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.reveal-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.6);
}

.answer-content {
    margin-bottom: var(--space-lg);
}

.answer-content h4 {
    color: var(--gray-600);
    font-size: var(--text-base);
    margin-bottom: var(--space-md);
}

.answer-content h3 {
    color: var(--primary-color);
    font-size: var(--text-3xl);
    font-weight: 700;
}

.feedback-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.feedback-btn {
    background: rgba(255, 255, 255, 0.8);
    color: var(--gray-700);
    border: 1px solid rgba(139, 92, 246, 0.2);
    padding: var(--space-md) var(--space-xl);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: var(--text-sm);
    font-weight: 600;
}

.feedback-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.2);
}

/* Mode quiz optimisé */
.quiz-options {
    display: grid;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
}

.quiz-option {
    background: rgba(255, 255, 255, 0.8);
    color: var(--gray-700);
    border: 1px solid rgba(139, 92, 246, 0.2);
    padding: var(--space-md) var(--space-lg);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: var(--text-sm);
    text-align: center;
    font-weight: 500;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.quiz-option:hover:not(:disabled) {
    background: rgba(255, 255, 255, 1);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.2);
    border-color: rgba(139, 92, 246, 0.4);
}

.quiz-option.correct {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.4);
    color: #047857;
    font-weight: 600;
}

.quiz-option.incorrect {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.4);
    color: #b91c1c;
    font-weight: 600;
}

/* Bouton Je ne sais pas */
.quiz-unknown-btn {
    background: rgba(255, 255, 255, 0.7);
    color: var(--gray-600);
    border: 1px solid rgba(139, 92, 246, 0.2);
    padding: var(--space-sm) var(--space-lg);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: var(--text-sm);
    font-weight: 500;
    text-align: center;
    font-style: italic;
    width: 45%;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.quiz-unknown-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.15);
    border-color: rgba(139, 92, 246, 0.3);
    color: var(--gray-700);
}



/* Résultats */
.review-results {
    text-align: center;
}

.results-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 24px;
    padding: var(--space-3xl);
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 25px 50px rgba(139, 92, 246, 0.2);
}

.results-card h2 {
    color: var(--primary-color);
    margin-bottom: var(--space-2xl);
    font-size: var(--text-3xl);
}

.results-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

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

.result-stat .stat-number {
    display: block;
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--space-xs);
}

.result-stat .stat-label {
    color: var(--gray-600);
    font-size: var(--text-sm);
    font-weight: 500;
}

.results-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Navigation de révision */
.nav-items {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

@media (max-width: 768px) {
  .deck-grid {
    grid-template-columns: 1fr;
  }
  
  .mode-grid {
    grid-template-columns: 1fr;
  }
  
  .feedback-buttons {
    flex-direction: column;
  }
  

  
  .results-actions {
    flex-direction: column;
  }
  
  .nav-items {
    flex-direction: column;
    gap: var(--space-sm);
  }
  
  .review-card {
    padding: var(--space-md);
    min-height: 180px;
  }
  
  /* Responsive pour les images */
  .card-image {
    max-width: 150px;
    max-height: 120px;
  }
  
  .card-text {
    font-size: 1.1rem;
  }
  
  .mode-content h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-md);
  }
  
  /* Nouvelles règles responsive */
  .deck-cards-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .deck-card-modes {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
  
  .deck-card-header {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }
  
  .app-header .user-info {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
    min-width: auto;
  }
  
  .app-header .user-email {
    min-width: auto;
  }
}

/* ===================================
   NOUVEAUX STYLES POUR MEMORISTE
   ================================= */

/* Hero Section avec Floating Cards */
.hero {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
  padding: var(--space-3xl) 0;
  min-height: 600px;
}

.hero-content {
  flex: 1;
  max-width: 500px;
}

.hero-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--space-lg);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--gray-600);
  margin-bottom: var(--space-2xl);
  line-height: 1.6;
}

.hero-actions {
  margin-bottom: var(--space-xl);
}

/* Nouveau bouton CTA moderne */
.cta-btn-modern {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-2xl);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  text-decoration: none;
  border-radius: 20px;
  font-size: var(--text-lg);
  font-weight: 600;
  transition: all 0.4s ease;
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
  overflow: hidden;
  z-index: 1;
}

.cta-btn-modern:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(139, 92, 246, 0.6);
  color: white;
  text-decoration: none;
}

.cta-btn-modern .btn-gradient {
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: all 0.6s ease;
  z-index: -1;
}

.cta-btn-modern:hover .btn-gradient {
  left: 100%;
}

.cta-btn-modern .btn-icon {
  font-size: var(--text-xl);
  animation: subtleFloat 3s ease-in-out infinite;
}

.cta-btn-modern .btn-text {
  position: relative;
  z-index: 2;
}

.hero-visual {
  flex: 1;
  position: relative;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Floating Cards Container - Version améliorée */
.floating-cards {
  position: relative;
  width: 100%;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
  /* Effet de profondeur de champ subtil */
  background: 
    radial-gradient(circle at 30% 20%, rgba(139, 92, 246, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(99, 102, 241, 0.02) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(147, 51, 234, 0.01) 0%, transparent 70%);
}

.floating-card {
  position: absolute;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.85));
  backdrop-filter: blur(25px);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 20px;
  padding: var(--space-lg) var(--space-xl);
  box-shadow: 
    0 8px 32px rgba(139, 92, 246, 0.12),
    0 2px 8px rgba(0, 0, 0, 0.04);
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  cursor: pointer;
  max-width: 280px;
  min-width: 220px;
  will-change: transform;
  transform-style: preserve-3d;
}

.floating-card:hover {
  transform: translateY(-12px) scale(1.06) rotateX(8deg) rotateY(2deg) !important;
  box-shadow: 
    0 25px 80px rgba(139, 92, 246, 0.3),
    0 12px 30px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  z-index: 20;
  border-color: rgba(139, 92, 246, 0.6);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.92));
}

.floating-card .card-front {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
}

.floating-card .card-emoji {
  font-size: 2.5rem;
  margin-bottom: var(--space-xs);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  animation: subtleFloat 6s ease-in-out infinite;
}

.floating-card .card-front h4 {
  color: var(--primary-color);
  font-size: var(--text-base);
  font-weight: 600;
  margin: 0;
  line-height: 1.3;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.floating-card .card-hint {
  font-size: var(--text-xs);
  color: var(--gray-500);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.7;
  background: rgba(139, 92, 246, 0.1);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 8px;
  border: 1px solid rgba(139, 92, 246, 0.2);
}

/* Éparpillement professionnel des cartes - Layout en constellation */
.card-1 {
  top: 12%;
  left: 15%;
  animation: elegantFloat1 14s ease-in-out infinite;
  animation-delay: 0s;
  transform: rotate(-8deg);
  z-index: 3;
  filter: brightness(1.02) saturate(1.1);
}

.card-2 {
  top: 60%;
  left: 5%;
  animation: elegantFloat2 16s ease-in-out infinite;
  animation-delay: -3s;
  transform: rotate(12deg);
  z-index: 1;
  filter: brightness(0.98) saturate(1.05);
}

.card-3 {
  top: 8%;
  right: 12%;
  animation: elegantFloat3 18s ease-in-out infinite;
  animation-delay: -6s;
  transform: rotate(5deg);
  z-index: 4;
  filter: brightness(1.05) saturate(1.15);
}

.card-4 {
  bottom: 20%;
  right: 25%;
  animation: elegantFloat4 15s ease-in-out infinite;
  animation-delay: -9s;
  transform: rotate(-15deg);
  z-index: 2;
  filter: brightness(0.96) saturate(1.08);
}

.card-5 {
  top: 35%;
  left: 45%;
  animation: elegantFloat5 17s ease-in-out infinite;
  animation-delay: -12s;
  transform: rotate(8deg);
  z-index: 5;
  filter: brightness(1.08) saturate(1.2);
}

/* Features modernes */
.features {
  padding: var(--space-3xl) 0;
}

.feature-grid-modern {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

.feature-item-modern {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  padding: var(--space-2xl);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.1);
  border-radius: 20px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.1);
}

.feature-item-modern:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(139, 92, 246, 0.2);
  border-color: rgba(139, 92, 246, 0.3);
}

.feature-icon-modern {
  font-size: 3rem;
  min-width: 4rem;
  text-align: center;
  animation: subtleFloat 5s ease-in-out infinite;
}

.feature-content {
  flex: 1;
}

.feature-content h3 {
  color: var(--primary-color);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.feature-content p {
  color: var(--gray-600);
  line-height: 1.6;
  margin: 0;
}

/* Responsive pour les nouvelles sections */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    text-align: center;
    min-height: auto;
    gap: var(--space-2xl);
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .hero-visual {
    min-height: 350px;
  }
  
  .floating-cards {
    height: 350px;
  }
  
  .floating-card {
    max-width: 200px;
    min-width: 160px;
    padding: var(--space-md) var(--space-lg);
    transform: scale(0.9);
  }
  
  .floating-card .card-emoji {
    font-size: 2rem;
  }
  
  .floating-card .card-front h4 {
    font-size: var(--text-sm);
    line-height: 1.3;
    min-height: 2rem;
  }
  
  .floating-card .card-hint {
    font-size: 0.7rem;
    padding: 2px 6px;
  }
  
  /* Repositionnement mobile optimisé */
  .card-1 { 
    top: 8%; 
    left: 8%; 
    transform: rotate(-5deg) scale(0.9);
  }
  .card-2 { 
    top: 72%; 
    left: 12%; 
    transform: rotate(8deg) scale(0.9);
  }
  .card-3 { 
    top: 12%; 
    right: 8%; 
    transform: rotate(3deg) scale(0.9);
  }
  .card-4 { 
    bottom: 18%; 
    right: 15%; 
    transform: rotate(-10deg) scale(0.9);
  }
  .card-5 { 
    top: 42%; 
    left: 35%; 
    transform: rotate(6deg) scale(0.9);
  }
  
  .feature-grid-modern {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .feature-item-modern {
    flex-direction: column;
    text-align: center;
    padding: var(--space-xl);
  }
  
  .cta-btn-modern {
    font-size: var(--text-base);
    padding: var(--space-md) var(--space-xl);
  }
}

@media (max-width: 480px) {
  .floating-cards {
    height: 250px;
    transform: scale(0.8);
  }
  
  .floating-card {
    max-width: 140px;
    min-width: 120px;
    padding: var(--space-sm) var(--space-md);
    border-radius: 16px;
  }
  
  .floating-card .card-emoji {
    font-size: 1.8rem;
  }
  
  .floating-card .card-front h4 {
    font-size: var(--text-xs);
    line-height: 1.2;
    min-height: 1.8rem;
  }
  
  .floating-card .card-hint {
    font-size: 0.65rem;
    padding: 1px 4px;
    letter-spacing: 0.3px;
  }
  
  /* Repositionnement très petits écrans - Plus compact */
  .card-1 { 
    top: 5%; 
    left: 3%; 
    transform: rotate(-3deg) scale(0.8);
  }
  .card-2 { 
    top: 78%; 
    left: 15%; 
    transform: rotate(5deg) scale(0.8);
  }
  .card-3 { 
    top: 15%; 
    right: 3%; 
    transform: rotate(2deg) scale(0.8);
  }
  .card-4 { 
    bottom: 8%; 
    right: 18%; 
    transform: rotate(-7deg) scale(0.8);
  }
  .card-5 { 
    top: 48%; 
    left: 28%; 
    transform: rotate(4deg) scale(0.8);
  }
  
  .hero-visual {
    min-height: 250px;
  }
  
  /* Optimisations spécifiques pour la révision sur petit écran */
  .review-main {
    padding: var(--space-sm) 0;
  }
  
  .review-card {
    margin-bottom: var(--space-sm);
    min-height: 160px;
    padding: var(--space-sm);
  }
  
  .progress-bar {
    margin-bottom: var(--space-sm);
    height: 4px;
  }
  
  .quiz-option {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-xs);
    min-height: 40px;
  }
  
  .quiz-actions {
    flex-direction: column;
    gap: var(--space-sm);
  }
  
  .quiz-unknown-btn,
  .quiz-mastered-btn {
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--text-xs);
    width: 100%;
    min-height: 36px;
  }
  
  .feedback-buttons {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }
  
  .feedback-btn.mastered {
    grid-column: span 2;
    margin-top: var(--space-xs);
  }
  
  .feedback-btn {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-xs);
  }
  
  .deck-info {
    margin-bottom: var(--space-md);
    padding: var(--space-sm) var(--space-md);
  }
  
  .deck-info-icon {
    font-size: var(--text-xl);
    min-width: 2.5rem;
  }
  
  .deck-info-content h3 {
    font-size: var(--text-base);
  }
} 

/* Bouton maîtrisé en mode classique */
.feedback-btn.mastered {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  border-color: #047857;
  font-weight: 700;
  position: relative;
  overflow: hidden;
}

.feedback-btn.mastered:hover {
  background: linear-gradient(135deg, #059669, #047857);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

.feedback-btn.mastered::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;
}

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

/* Container pour les actions quiz */
.quiz-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}

/* Bouton maîtrisé en mode quiz */
.quiz-mastered-btn {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  border: 1px solid #047857;
  padding: var(--space-sm) var(--space-lg);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: center;
  width: 45%;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.quiz-mastered-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, #059669, #047857);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.quiz-mastered-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.quiz-mastered-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;
}

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

/* Styles pour les raccourcis clavier */
kbd {
  display: inline-block;
  padding: 2px 6px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
  color: var(--gray-600);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 4px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  margin-left: var(--space-xs);
  font-family: var(--font-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.feedback-btn:hover kbd,
.reveal-btn:hover kbd,
.quiz-unknown-btn:hover kbd,
.quiz-mastered-btn:hover kbd {
  background: rgba(255, 255, 255, 1);
  border-color: rgba(139, 92, 246, 0.5);
  color: var(--primary-color);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.feedback-btn.mastered kbd {
  color: white;
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
}

.feedback-btn.mastered:hover kbd {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
}

.quiz-mastered-btn kbd {
  color: white;
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
}

.quiz-mastered-btn:hover kbd {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
}

/* Animation subtile pour les kbd */
@keyframes kbdPulse {
  0%, 100% { 
    opacity: 1; 
    transform: scale(1);
  }
  50% { 
    opacity: 0.8; 
    transform: scale(0.98);
  }
}

kbd:hover {
  animation: kbdPulse 0.6s ease-in-out;
}

/* Bouton d'aide */
.help-toggle {
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
  transition: all 0.3s ease;
  min-width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.help-toggle:hover {
  background: rgba(139, 92, 246, 0.2);
  border-color: rgba(139, 92, 246, 0.4);
  transform: scale(1.05);
}

.help-icon {
  font-size: 1rem;
  transition: all 0.3s ease;
}

.deck-info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  border: 1px solid rgba(139, 92, 246, 0.1);
}

/* Panneau d'aide */
.help-panel {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 16px;
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.15);
}

.help-content h4 {
  color: var(--primary-color);
  margin-bottom: var(--space-md);
  font-size: var(--text-lg);
  text-align: center;
}

.help-shortcuts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.help-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: rgba(139, 92, 246, 0.05);
  border-radius: 8px;
  font-size: var(--text-sm);
}

.help-item kbd {
  margin: 0;
  min-width: 2rem;
  text-align: center;
}

.help-mastery {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(139, 92, 246, 0.1));
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 12px;
  padding: var(--space-md);
  text-align: center;
}

.help-mastery p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--gray-700);
  line-height: 1.4;
}

/* Responsive pour l'aide */
@media (max-width: 480px) {
  .help-shortcuts {
    grid-template-columns: 1fr;
  }
  
  .help-panel {
    padding: var(--space-md);
  }
  
  .help-toggle {
    min-width: 2rem;
    height: 2rem;
  }
}