/* Formation Detail Page - Version Optimisée 5.0 */
/* Améliorations: Performance, Accessibilité, UX, Responsivité */
/* Cache buster: 2025-11-10 */

/* 🧪 MARQUEUR DE TEST - Si vous voyez ce fond rouge, le CSS optimisé EST chargé ! */
body.formation-detail-page::before {
  content: "✅ CSS OPTIMISÉ CHARGÉ - TEST RÉUSSI !";
  position: fixed;
  top: 0;
  left: 0;
  background: #16a34a;
  color: white;
  padding: 8px 16px;
  font-weight: bold;
  z-index: 999999;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

:root {
  /* ====== SYSTÈME DE DESIGN TOKENS ====== */
  /* Couleurs primaires */
  --fd-primary: #2563eb;
  --fd-primary-dark: #1d4ed8;
  --fd-primary-light: #3b82f6;
  --fd-accent: #16a34a;
  --fd-warning: #f59e0b;
  --fd-danger: #ef4444;

  /* Couleurs de fond */
  --fd-bg: #ffffff;
  --fd-bg-secondary: #f8f9fa;
  --fd-bg-tertiary: #f3f4f6;
  --fd-card: #ffffff;
  --fd-card-soft: rgba(255, 255, 255, 0.85);
  --fd-card-elevated: #f8fafc;

  /* Couleurs de texte */
  --fd-text-primary: #111827;
  --fd-text-secondary: #4b5563;
  --fd-text-tertiary: #6b7280;
  --fd-text-inverse: #ffffff;
  --fd-heading: #000000;

  /* Couleurs de bordures */
  --fd-border-light: rgba(0, 0, 0, 0.08);
  --fd-border: rgba(0, 0, 0, 0.12);
  --fd-border-strong: rgba(0, 0, 0, 0.2);

  /* Ombres */
  --fd-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --fd-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --fd-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --fd-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --fd-shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);

  /* Gradients */
  --fd-gradient-primary: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.05));
  --fd-gradient-success: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(37, 99, 235, 0.05));
  --fd-gradient-info: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(37, 99, 235, 0.1));

  /* Typographie */
  --fd-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --fd-font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;

  /* Tailles de police */
  --fd-text-xs: 0.75rem;    /* 12px */
  --fd-text-sm: 0.875rem;   /* 14px */
  --fd-text-base: 1rem;     /* 16px */
  --fd-text-lg: 1.125rem;   /* 18px */
  --fd-text-xl: 1.25rem;    /* 20px */
  --fd-text-2xl: 1.5rem;    /* 24px */
  --fd-text-3xl: 1.875rem;  /* 30px */
  --fd-text-4xl: 2.25rem;   /* 36px */

  /* Graisses de police */
  --fd-font-normal: 400;
  --fd-font-medium: 500;
  --fd-font-semibold: 600;
  --fd-font-bold: 700;
  --fd-font-extrabold: 800;

  /* Espacements (système 4px) */
  --fd-space-1: 0.25rem;   /* 4px */
  --fd-space-2: 0.5rem;    /* 8px */
  --fd-space-3: 0.75rem;   /* 12px */
  --fd-space-4: 1rem;      /* 16px */
  --fd-space-5: 1.25rem;   /* 20px */
  --fd-space-6: 1.5rem;    /* 24px */
  --fd-space-8: 2rem;      /* 32px */
  --fd-space-10: 2.5rem;   /* 40px */
  --fd-space-12: 3rem;     /* 48px */
  --fd-space-16: 4rem;     /* 64px */
  --fd-space-20: 5rem;     /* 80px */

  /* Rayons de bordure */
  --fd-radius-sm: 4px;
  --fd-radius: 6px;
  --fd-radius-md: 8px;
  --fd-radius-lg: 12px;
  --fd-radius-xl: 16px;
  --fd-radius-full: 9999px;

  /* Transitions */
  --fd-transition-fast: 0.15s ease;
  --fd-transition-base: 0.2s ease;
  --fd-transition-slow: 0.3s ease;
  --fd-transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Z-Index Scale */
  --fd-z-dropdown: 1000;
  --fd-z-sticky: 1020;
  --fd-z-fixed: 1030;
  --fd-z-modal: 1050;
  --fd-z-popover: 1060;
  --fd-z-tooltip: 1070;
  --fd-z-banner: 99999;

  /* Dimensions */
  --fd-sidebar-width: 280px;
  --fd-sidebar-width-collapsed: 72px;
  --fd-header-height: 64px;
}

/* ====== THÈME SOMBRE ====== */
html[data-theme="dark"] {
  --fd-bg: #0b0c0f;
  --fd-bg-secondary: #141720;
  --fd-bg-tertiary: #1b1f2a;
  --fd-card: #141720;
  --fd-card-soft: rgba(20, 23, 32, 0.8);
  --fd-card-elevated: #1b1f2a;
  --fd-text-primary: #e6e8ee;
  --fd-text-secondary: #a3a8b8;
  --fd-text-tertiary: #8b91a0;
  --fd-heading: #f5f5fb;
  --fd-border-light: rgba(89, 97, 119, 0.24);
  --fd-border: rgba(89, 97, 119, 0.3);
  --fd-border-strong: rgba(148, 163, 184, 0.4);
  --fd-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.5);
  --fd-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.6), 0 1px 2px rgba(0, 0, 0, 0.4);
  --fd-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.3);
  --fd-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5), 0 4px 6px rgba(0, 0, 0, 0.2);
  --fd-shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6), 0 10px 10px rgba(0, 0, 0, 0.15);
}

/* ====== BASE ====== */
body.formation-detail-page {
  font-family: var(--fd-font-sans);
  background: var(--fd-bg) !important;
  color: var(--fd-text-primary) !important;
  font-size: var(--fd-text-base);
  line-height: 1.6;
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ====== SIDEBAR AMÉLIORÉE ====== */
.formation-lessons-sidebar {
  position: fixed;
  left: 0;
  top: var(--fd-header-height);
  bottom: 0;
  width: var(--fd-sidebar-width);
  background: var(--fd-bg-secondary);
  border-right: 1px solid var(--fd-border-light);
  padding: var(--fd-space-6);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: var(--fd-z-sticky);
  box-shadow: var(--fd-shadow-md);
  transition: transform var(--fd-transition-slow);
  scrollbar-width: thin;
  scrollbar-color: var(--fd-border) transparent;
}

.formation-lessons-sidebar::-webkit-scrollbar {
  width: 6px;
}

.formation-lessons-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.formation-lessons-sidebar::-webkit-scrollbar-thumb {
  background-color: var(--fd-border-strong);
  border-radius: var(--fd-radius-full);
}

.formation-lessons-sidebar::-webkit-scrollbar-thumb:hover {
  background-color: var(--fd-text-tertiary);
}

/* Bouton de fermeture sidebar sur mobile */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: calc(var(--fd-header-height) + var(--fd-space-4));
  left: var(--fd-space-4);
  z-index: var(--fd-z-fixed);
  background: var(--fd-card);
  border: 1px solid var(--fd-border);
  border-radius: var(--fd-radius-md);
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--fd-shadow-lg);
  transition: all var(--fd-transition-base);
}

.sidebar-toggle:hover {
  background: var(--fd-bg-tertiary);
  transform: translateY(-1px);
  box-shadow: var(--fd-shadow-xl);
}

.sidebar-toggle:focus-visible {
  outline: 2px solid var(--fd-primary);
  outline-offset: 2px;
}

.sidebar-toggle i {
  font-size: var(--fd-text-xl);
  color: var(--fd-text-primary);
}

/* Overlay pour mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: var(--fd-header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--fd-z-sticky) - 1);
  opacity: 0;
  visibility: hidden;
  transition: all var(--fd-transition-base);
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Sidebar responsive states */
@media (max-width: 1200px) {
  :root {
    --fd-sidebar-width: 240px;
  }
}

@media (max-width: 992px) {
  .formation-lessons-sidebar {
    transform: translateX(-100%);
    width: min(90%, 400px);
    box-shadow: var(--fd-shadow-xl);
  }

  .formation-lessons-sidebar.active {
    transform: translateX(0);
  }

  .sidebar-toggle {
    display: flex;
  }

  .sidebar-overlay {
    display: block;
  }
}

/* ====== TITRES ET NAVIGATION ====== */
.formation-lessons-sidebar h3 {
  font-size: var(--fd-text-lg);
  font-weight: var(--fd-font-bold);
  color: var(--fd-heading);
  margin-bottom: var(--fd-space-4);
  padding-bottom: var(--fd-space-3);
  border-bottom: 2px solid var(--fd-border);
  position: sticky;
  top: 0;
  background: var(--fd-bg-secondary);
  z-index: 1;
}

.lesson-nav-item {
  display: block;
  padding: var(--fd-space-3) var(--fd-space-4);
  margin-bottom: var(--fd-space-2);
  border-radius: var(--fd-radius);
  text-decoration: none;
  color: var(--fd-text-secondary);
  font-size: var(--fd-text-sm);
  font-weight: var(--fd-font-medium);
  transition: all var(--fd-transition-base);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.lesson-nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--fd-primary);
  transform: scaleY(0);
  transition: transform var(--fd-transition-base);
  transform-origin: bottom;
}

.lesson-nav-item:hover {
  background: var(--fd-bg-tertiary);
  color: var(--fd-text-primary);
  border-color: var(--fd-border);
  padding-left: calc(var(--fd-space-4) + var(--fd-space-1));
}

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

.lesson-nav-item.active {
  background: var(--fd-gradient-primary);
  color: var(--fd-primary);
  border-color: var(--fd-primary);
  font-weight: var(--fd-font-semibold);
  box-shadow: var(--fd-shadow-sm);
}

.lesson-nav-item.active::before {
  transform: scaleY(1);
}

.lesson-nav-item.completed {
  color: var(--fd-accent);
}

.lesson-nav-item i {
  margin-right: var(--fd-space-2);
  font-size: var(--fd-text-sm);
  display: inline-block;
  transition: transform var(--fd-transition-base);
}

.lesson-nav-item:hover i {
  transform: translateX(2px);
}

/* ====== CONTENU PRINCIPAL ====== */
.formation-detail-container {
  margin-left: var(--fd-sidebar-width);
  max-width: 1200px;
  width: calc(100% - var(--fd-sidebar-width));
  padding-bottom: var(--fd-space-20);
  transition: all var(--fd-transition-slow);
}

@media (max-width: 992px) {
  .formation-detail-container {
    margin-left: 0;
    width: 100%;
  }
}

/* ====== WRAPPER DE CONTENU DE LEÇON ====== */
.lesson-content-wrapper {
  background: var(--fd-card);
  border-radius: var(--fd-radius-lg);
  padding: var(--fd-space-10);
  box-shadow: var(--fd-shadow-sm);
  margin: var(--fd-space-8) auto;
  border: 1px solid var(--fd-border-light);
  animation: fadeInUp 0.5s ease;
  will-change: transform, opacity;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate3d(0, 20px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

/* ====== CODE BLOCKS AMÉLIORÉS ====== */
pre {
  background: #1e1e1e !important;
  border-radius: var(--fd-radius-md) !important;
  padding: var(--fd-space-6) !important;
  overflow-x: auto !important;
  border: 1px solid #333 !important;
  margin: var(--fd-space-6) 0 !important;
  position: relative;
  box-shadow: var(--fd-shadow-sm);
}

pre::before {
  content: attr(data-language);
  position: absolute;
  top: var(--fd-space-2);
  right: var(--fd-space-2);
  background: rgba(255, 255, 255, 0.1);
  color: #d4d4d4;
  padding: var(--fd-space-1) var(--fd-space-2);
  border-radius: var(--fd-radius-sm);
  font-size: var(--fd-text-xs);
  font-weight: var(--fd-font-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

pre code {
  background: transparent !important;
  color: #d4d4d4 !important;
  font-family: var(--fd-font-mono) !important;
  font-size: var(--fd-text-sm) !important;
  line-height: 1.7 !important;
  padding: 0 !important;
  display: block;
}

p code, li code {
  background: var(--fd-bg-tertiary) !important;
  color: #c7254e !important;
  padding: var(--fd-space-1) var(--fd-space-2) !important;
  border-radius: var(--fd-radius-sm) !important;
  font-size: 0.875em !important;
  font-family: var(--fd-font-mono) !important;
  border: 1px solid var(--fd-border);
}

/* ====== BOÎTES D'INFO ====== */
.p-info {
  background: var(--fd-gradient-primary) !important;
  border-left: 4px solid var(--fd-primary) !important;
  padding: var(--fd-space-4) var(--fd-space-5) !important;
  border-radius: var(--fd-radius) !important;
  margin: var(--fd-space-6) 0 !important;
  box-shadow: var(--fd-shadow-xs);
  transition: all var(--fd-transition-base);
}

.p-info:hover {
  box-shadow: var(--fd-shadow-sm);
  transform: translateX(2px);
}

.p-info strong {
  color: var(--fd-primary) !important;
}

/* ====== HERO SECTION ====== */
.hero-intro {
  max-width: 800px;
  margin: 0 auto var(--fd-space-12);
  text-align: center;
  padding: var(--fd-space-8) var(--fd-space-4);
}

.hero-intro h2 {
  color: var(--fd-heading) !important;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: var(--fd-font-bold);
  margin-bottom: var(--fd-space-4);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero-intro p {
  line-height: 1.7;
  color: var(--fd-text-secondary) !important;
  font-size: var(--fd-text-lg);
  margin-bottom: 0;
}

/* ====== BOUTON RETOUR AMÉLIORÉ ====== */
.hero-intro .back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--fd-space-2);
  padding: var(--fd-space-3) var(--fd-space-5);
  border-radius: var(--fd-radius-md);
  border: 1px solid var(--fd-border);
  color: var(--fd-text-primary) !important;
  text-decoration: none;
  background: var(--fd-card) !important;
  transition: all var(--fd-transition-base);
  box-shadow: var(--fd-shadow-sm);
  font-weight: var(--fd-font-medium);
  font-size: var(--fd-text-sm);
  margin-bottom: var(--fd-space-6);
  position: relative;
  overflow: hidden;
}

.hero-intro .back-link::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;
}

.hero-intro .back-link:hover {
  transform: translateY(-2px);
  border-color: var(--fd-primary);
  color: var(--fd-primary) !important;
  box-shadow: var(--fd-shadow-md);
}

.hero-intro .back-link:hover::before {
  left: 100%;
}

.hero-intro .back-link:focus-visible {
  outline: 2px solid var(--fd-primary);
  outline-offset: 2px;
}

/* ====== TITRE PRINCIPAL ====== */
.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--fd-font-extrabold);
  color: var(--fd-heading);
  margin-bottom: var(--fd-space-4);
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--fd-primary), var(--fd-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ====== MÉTADONNÉES ====== */
.hero-summary {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--fd-space-3);
  font-size: var(--fd-text-base);
  color: var(--fd-text-secondary);
  margin-bottom: var(--fd-space-8);
}

.hero-summary-item {
  font-weight: var(--fd-font-medium);
  display: flex;
  align-items: center;
  gap: var(--fd-space-2);
}

.hero-summary-separator {
  color: var(--fd-primary);
  opacity: 0.6;
}

/* ====== BREADCRUMB ====== */
.breadcrumb {
  background: rgba(12, 13, 18, 0.6);
  border: 1px solid var(--fd-border);
  border-radius: var(--fd-radius-full);
  padding: var(--fd-space-3) var(--fd-space-5);
  margin-bottom: var(--fd-space-8);
  font-size: var(--fd-text-sm);
  letter-spacing: 0.02em;
  color: var(--fd-text-secondary);
  box-shadow: var(--fd-shadow-sm);
  backdrop-filter: blur(10px);
  display: inline-flex;
  align-items: center;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
  color: var(--fd-text-tertiary);
  content: "/";
  padding: 0 var(--fd-space-2);
  margin: 0 var(--fd-space-1);
}

.breadcrumb-item a {
  color: var(--fd-text-secondary);
  text-decoration: none;
  transition: color var(--fd-transition-fast);
  border-radius: var(--fd-radius-sm);
  padding: var(--fd-space-1) var(--fd-space-2);
}

.breadcrumb-item a:hover {
  color: var(--fd-text-primary);
  background: var(--fd-bg-tertiary);
}

.breadcrumb-item a:focus-visible {
  outline: 2px solid var(--fd-primary);
  outline-offset: 2px;
}

.breadcrumb-item.active {
  color: var(--fd-text-primary);
  font-weight: var(--fd-font-semibold);
}

/* ====== SECTION HEADER ====== */
.formation-header {
  position: relative;
  overflow: hidden;
  border-radius: var(--fd-radius-lg) !important;
  padding: var(--fd-space-10) var(--fd-space-8) !important;
  margin-bottom: var(--fd-space-8) !important;
  background: var(--fd-card) !important;
  border: 1px solid var(--fd-border-light) !important;
  box-shadow: var(--fd-shadow-sm) !important;
  color: var(--fd-text-primary);
}

.formation-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--fd-primary), var(--fd-accent), var(--fd-primary));
  background-size: 200% 100%;
  animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.formation-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: var(--fd-font-bold);
  line-height: 1.2;
  margin-bottom: var(--fd-space-5);
  color: var(--fd-heading) !important;
  letter-spacing: -0.02em;
}

/* ====== BADGES ====== */
.formation-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--fd-space-3);
  margin-bottom: var(--fd-space-6);
}

.formation-badges .badge {
  display: inline-flex;
  align-items: center;
  gap: var(--fd-space-2);
  padding: var(--fd-space-2) var(--fd-space-4);
  border-radius: var(--fd-radius);
  font-weight: var(--fd-font-semibold);
  font-size: var(--fd-text-xs);
  background: var(--fd-bg-tertiary) !important;
  color: var(--fd-text-primary) !important;
  border: 1px solid var(--fd-border);
  letter-spacing: 0.02em;
  transition: all var(--fd-transition-base);
  cursor: default;
}

.formation-badges .badge:hover {
  background: var(--fd-bg-secondary) !important;
  border-color: var(--fd-border-strong);
  transform: translateY(-1px);
  box-shadow: var(--fd-shadow-sm);
}

.formation-badges .badge.bg-info {
  color: var(--fd-text-inverse) !important;
  background: var(--fd-primary) !important;
  border-color: var(--fd-primary);
  box-shadow: var(--fd-shadow-xs);
}

.formation-badges .badge.bg-info:hover {
  background: var(--fd-primary-dark) !important;
  box-shadow: var(--fd-shadow-sm);
}

/* ====== DESCRIPTION ====== */
.formation-description {
  font-size: var(--fd-text-base);
  line-height: 1.7;
  max-width: 800px;
  margin-bottom: var(--fd-space-8);
  color: var(--fd-text-secondary) !important;
  font-weight: var(--fd-font-normal);
}

.formation-description strong {
  color: var(--fd-text-primary) !important;
  font-weight: var(--fd-font-semibold);
}

.formation-description p {
  margin-bottom: var(--fd-space-4);
}

/* ====== MÉTADONNÉES DE FORMATION ====== */
.formation-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--fd-space-3);
  color: var(--fd-text-secondary);
}

.formation-meta span {
  display: flex;
  align-items: center;
  gap: var(--fd-space-3);
  padding: var(--fd-space-4) var(--fd-space-5);
  background: var(--fd-bg-secondary) !important;
  border-radius: var(--fd-radius-md);
  border: 1px solid var(--fd-border-light);
  font-size: var(--fd-text-sm);
  font-weight: var(--fd-font-medium);
  color: var(--fd-text-primary) !important;
  box-shadow: none;
  transition: all var(--fd-transition-base);
}

.formation-meta span:hover {
  background: var(--fd-bg-tertiary) !important;
  border-color: var(--fd-border);
  transform: translateY(-1px);
  box-shadow: var(--fd-shadow-sm);
}

.formation-meta i {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--fd-radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fd-text-base);
  background: var(--fd-gradient-primary);
  color: var(--fd-primary);
  flex-shrink: 0;
}

/* ====== CARTE DE PROGRESSION ====== */
.progress-card {
  position: relative;
  overflow: hidden;
  background: var(--fd-card-elevated);
  border-radius: var(--fd-radius-lg);
  padding: var(--fd-space-8) var(--fd-space-9);
  color: var(--fd-heading);
  border: 1px solid var(--fd-border);
  box-shadow: var(--fd-shadow-md);
  margin: 0 auto var(--fd-space-12);
}

.progress-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--fd-gradient-success);
  opacity: 0.6;
  pointer-events: none;
}

.progress-card > * {
  position: relative;
  z-index: 1;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--fd-space-5);
  font-weight: var(--fd-font-bold);
  font-size: var(--fd-text-lg);
  color: var(--fd-heading);
}

.progress-label span:last-child {
  font-size: var(--fd-text-sm);
  font-weight: var(--fd-font-semibold);
  color: var(--fd-heading);
  padding: var(--fd-space-1) var(--fd-space-3);
  border-radius: var(--fd-radius-full);
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  letter-spacing: 0.04em;
}

.progress-card .progress {
  height: 12px;
  border-radius: var(--fd-radius-full);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  overflow: hidden;
  position: relative;
}

.progress-card .progress::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0) 0%,
    rgba(255,255,255,0.3) 50%,
    rgba(255,255,255,0) 100%
  );
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

.progress-card .progress-bar {
  background: linear-gradient(
    90deg,
    var(--fd-primary),
    var(--fd-primary-light),
    var(--fd-accent)
  );
  transition: width 1s cubic-bezier(0.22, 1, 0.36, 1);
  border-radius: var(--fd-radius-full);
  position: relative;
  overflow: hidden;
}

.progress-card .progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255,255,255,0.4),
    transparent
  );
  animation: progressShine 2s infinite;
}

@keyframes progressShine {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* ====== TITRES DE SECTIONS ====== */
.content-section-title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: var(--fd-font-bold);
  color: var(--fd-heading) !important;
  margin-bottom: var(--fd-space-6);
  text-align: left;
  position: relative;
  letter-spacing: -0.02em;
  padding-bottom: var(--fd-space-3);
}

.content-section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--fd-primary), transparent);
  border-radius: var(--fd-radius-full);
}

/* ====== ACCORDÉON ====== */
.accordion {
  gap: var(--fd-space-4);
  display: grid;
}

.accordion-item {
  border: 1px solid var(--fd-border-light) !important;
  border-radius: var(--fd-radius-md) !important;
  margin: 0 !important;
  overflow: hidden;
  background: var(--fd-card) !important;
  box-shadow: var(--fd-shadow-sm);
  transition: all var(--fd-transition-base);
}

.accordion-item:hover {
  box-shadow: var(--fd-shadow-md);
  border-color: var(--fd-border) !important;
  transform: translateY(-1px);
}

.accordion-button {
  font-size: var(--fd-text-base);
  font-weight: var(--fd-font-semibold);
  padding: var(--fd-space-5) var(--fd-space-6);
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  color: var(--fd-text-primary) !important;
  transition: all var(--fd-transition-base);
}

.accordion-button:not(.collapsed) {
  color: var(--fd-primary) !important;
  background: var(--fd-bg-secondary) !important;
}

.accordion-button:focus {
  box-shadow: none !important;
  outline: 2px solid var(--fd-primary);
  outline-offset: -2px;
}

.accordion-button::after {
  width: 1.25rem;
  height: 1.25rem;
  background-size: 1.25rem;
  filter: none;
  transform-origin: center;
  transition: transform var(--fd-transition-base);
}

.accordion-button:not(.collapsed)::after {
  transform: rotate(180deg);
}

html[data-theme="dark"] .accordion-button::after {
  filter: brightness(0) invert(1);
}

.module-header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding-right: var(--fd-space-6);
  gap: var(--fd-space-5);
}

.module-header-content span:first-child {
  font-weight: var(--fd-font-semibold);
  color: var(--fd-heading);
  letter-spacing: 0.01em;
}

.module-count-badge {
  background: rgba(37, 99, 235, 0.15);
  color: var(--fd-primary);
  padding: var(--fd-space-2) var(--fd-space-4);
  border-radius: var(--fd-radius-full);
  font-size: var(--fd-text-xs);
  font-weight: var(--fd-font-bold);
  border: 1px solid rgba(37, 99, 235, 0.3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.accordion-body {
  padding: var(--fd-space-6);
  background: var(--fd-bg-secondary) !important;
  border-top: 1px solid var(--fd-border-light);
  color: var(--fd-text-secondary) !important;
}

.accordion-body .text-muted {
  color: var(--fd-text-tertiary) !important;
  margin-bottom: var(--fd-space-4);
  font-size: var(--fd-text-sm);
}

/* ====== LISTE DE LEÇONS ====== */
.list-group {
  display: grid;
  gap: var(--fd-space-2);
  padding-left: 0;
  list-style: none;
}

.list-group-item {
  border: 1px solid var(--fd-border-light) !important;
  padding: 0 !important;
  background: var(--fd-card) !important;
  border-radius: var(--fd-radius);
  transition: all var(--fd-transition-base);
  box-shadow: none;
  color: var(--fd-text-primary) !important;
  position: relative;
  overflow: hidden;
}

.list-group-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--fd-primary);
  transform: scaleY(0);
  transition: transform var(--fd-transition-base);
}

.list-group-item:hover {
  background: var(--fd-bg-secondary) !important;
  border-color: var(--fd-border) !important;
  box-shadow: var(--fd-shadow-sm);
  transform: translateX(4px);
}

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

.list-group-item > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--fd-space-4);
  width: 100%;
  padding: var(--fd-space-4) var(--fd-space-5);
}

.list-group-item a {
  color: var(--fd-text-primary) !important;
  text-decoration: none !important;
  font-weight: var(--fd-font-medium);
  font-size: var(--fd-text-sm);
  transition: color var(--fd-transition-fast);
  display: block;
  width: 100%;
  padding: var(--fd-space-4) var(--fd-space-5);
  border-radius: var(--fd-radius);
}

.list-group-item:has(a) {
  padding: 0 !important;
}

.list-group-item a:hover {
  color: var(--fd-primary) !important;
}

.list-group-item a:focus-visible {
  outline: 2px solid var(--fd-primary);
  outline-offset: 2px;
  border-radius: var(--fd-radius);
}

.lesson-icon {
  width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--fd-space-3);
  color: var(--fd-primary);
  background: var(--fd-gradient-primary);
  border-radius: var(--fd-radius);
  font-size: var(--fd-text-sm);
  flex-shrink: 0;
  transition: all var(--fd-transition-base);
}

.list-group-item:hover .lesson-icon {
  transform: scale(1.1);
  box-shadow: var(--fd-shadow-sm);
}

.list-group-item .badge {
  background: var(--fd-gradient-primary) !important;
  color: var(--fd-primary) !important;
  border-radius: var(--fd-radius-sm);
  border: none;
  padding: var(--fd-space-1) var(--fd-space-2);
  font-weight: var(--fd-font-semibold);
  font-size: var(--fd-text-xs);
  letter-spacing: 0.02em;
  box-shadow: var(--fd-shadow-xs);
}

/* ====== QUIZ ITEMS ====== */
.quiz-item {
  background: rgba(245, 158, 11, 0.08) !important;
  border-left: 4px solid rgba(245, 158, 11, 0.6) !important;
  color: var(--fd-heading);
}

.quiz-item:hover {
  transform: translateX(8px);
  background: rgba(245, 158, 11, 0.12) !important;
  border-color: rgba(245, 158, 11, 0.82) !important;
  box-shadow: var(--fd-shadow-md);
}

.quiz-item::before {
  background: var(--fd-warning);
}

.quiz-item .btn-warning {
  border-radius: var(--fd-radius-full);
  border: none;
  font-weight: var(--fd-font-semibold);
  padding: var(--fd-space-2) var(--fd-space-5);
  background: var(--fd-warning);
  color: #0b0c0f;
  transition: all var(--fd-transition-base);
  box-shadow: var(--fd-shadow-sm);
}

.quiz-item .btn-warning:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: var(--fd-shadow-lg);
  filter: brightness(1.1);
}

/* ====== BOUTONS D'ACTION FLOTTANTS (FAB) ====== */
.fab-container {
  position: fixed;
  bottom: var(--fd-space-10);
  right: var(--fd-space-10);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--fd-space-3);
  z-index: var(--fd-z-fixed);
}

.fab-menu {
  display: flex;
  flex-direction: column;
  gap: var(--fd-space-3);
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: all var(--fd-transition-base);
}

.fab-menu.active,
.fab:hover + .fab-menu,
.fab-menu:has(+ .fab:hover) {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.fab,
.fab-item {
  width: 3.75rem;
  height: 3.75rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(12, 13, 18, 0.95);
  color: var(--fd-text-inverse);
  border: 1px solid var(--fd-border);
  box-shadow: var(--fd-shadow-lg);
  cursor: pointer;
  transition: all var(--fd-transition-base);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.fab::before,
.fab-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity var(--fd-transition-base);
}

.fab:hover::before,
.fab-item:hover::before {
  opacity: 1;
}

.fab-primary {
  background: linear-gradient(135deg, var(--fd-primary), var(--fd-primary-dark));
  border-color: rgba(37, 99, 235, 0.5);
  box-shadow: var(--fd-shadow-xl);
}

.fab:hover,
.fab-item:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--fd-shadow-xl);
  border-color: var(--fd-border-strong);
}

.fab-item i,
.fab-primary i {
  font-size: var(--fd-text-xl);
  position: relative;
  z-index: 1;
}

/* ====== TOGGLE THÈME ====== */
.theme-toggle {
  position: fixed;
  bottom: var(--fd-space-10);
  left: var(--fd-space-10);
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: rgba(12, 13, 18, 0.95);
  color: var(--fd-text-inverse);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid var(--fd-border);
  box-shadow: var(--fd-shadow-lg);
  transition: all var(--fd-transition-base);
  backdrop-filter: blur(10px);
  z-index: var(--fd-z-fixed);
}

.theme-toggle:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--fd-shadow-xl);
  border-color: var(--fd-border-strong);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--fd-primary);
  outline-offset: 2px;
}

.theme-toggle i {
  font-size: var(--fd-text-lg);
  position: relative;
  z-index: 1;
  transition: transform var(--fd-transition-slow);
}

.theme-toggle:hover i {
  transform: rotate(180deg);
}

/* ====== ANIMATIONS ====== */
.animate-fade-in-up {
  opacity: 0;
  transform: translate3d(0, 30px, 0);
  animation: fadeInUp 0.6s ease forwards;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

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

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.active {
  opacity: 1;
  transform: none;
}

/* ====== RESPONSIVE DESIGN ====== */
@media (max-width: 1200px) {
  .formation-detail-container {
    padding-bottom: var(--fd-space-16);
  }

  .formation-header {
    padding: var(--fd-space-8) var(--fd-space-6) !important;
  }

  .lesson-content-wrapper {
    padding: var(--fd-space-8);
  }
}

@media (max-width: 992px) {
  .hero-intro {
    margin-bottom: var(--fd-space-8);
  }

  .breadcrumb {
    border-radius: var(--fd-radius-lg);
    padding: var(--fd-space-3) var(--fd-space-4);
  }

  .formation-header {
    padding: var(--fd-space-6) var(--fd-space-5) !important;
    margin-bottom: var(--fd-space-6) !important;
  }

  .formation-meta {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .progress-card {
    margin: 0 0 var(--fd-space-8);
  }

  .accordion-body {
    padding: var(--fd-space-5);
  }

  .module-header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--fd-space-3);
  }

  .list-group-item {
    flex-direction: column;
  }

  .fab-container {
    right: var(--fd-space-6);
    bottom: var(--fd-space-6);
  }

  .theme-toggle {
    left: var(--fd-space-6);
    bottom: var(--fd-space-6);
  }

  .sidebar-toggle {
    display: flex;
  }
}

@media (max-width: 768px) {
  .formation-detail-container {
    width: 94%;
  }

  .hero-summary {
    gap: var(--fd-space-2);
    font-size: var(--fd-text-sm);
  }

  .formation-header {
    padding: var(--fd-space-5) var(--fd-space-4) !important;
  }

  .formation-title {
    font-size: clamp(1.5rem, 6vw, 2rem);
  }

  .formation-meta {
    grid-template-columns: 1fr;
  }

  .formation-badges {
    gap: var(--fd-space-2);
  }

  .formation-badges .badge {
    font-size: var(--fd-text-xs);
    padding: var(--fd-space-1) var(--fd-space-3);
  }

  .content-section-title {
    font-size: clamp(1.5rem, 5vw, 1.75rem);
  }

  .accordion {
    gap: var(--fd-space-3);
  }

  .fab,
  .fab-item {
    width: 3.25rem;
    height: 3.25rem;
  }

  .fab-menu {
    gap: var(--fd-space-2);
  }

  .theme-toggle {
    width: 3rem;
    height: 3rem;
  }

  .sidebar-toggle {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 576px) {
  .hero-intro {
    padding: var(--fd-space-6) var(--fd-space-2);
  }

  .hero-intro h2 {
    font-size: clamp(1.5rem, 6vw, 1.75rem);
  }

  .formation-header {
    padding: var(--fd-space-4) var(--fd-space-3) !important;
  }

  .lesson-content-wrapper {
    padding: var(--fd-space-5);
    margin: var(--fd-space-6) auto;
  }

  pre {
    padding: var(--fd-space-4) !important;
    font-size: var(--fd-text-xs) !important;
  }

  .accordion-button {
    padding: var(--fd-space-4);
    font-size: var(--fd-text-sm);
  }

  .accordion-body {
    padding: var(--fd-space-4);
  }

  .formation-meta span {
    padding: var(--fd-space-3);
    font-size: var(--fd-text-xs);
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }

  .animate-fade-in-up {
    opacity: 1;
    transform: none;
    animation: none;
  }
}

/* ====== MODE HAUT CONTRASTE ====== */
@media (prefers-contrast: high) {
  :root {
    --fd-border: rgba(0, 0, 0, 0.3);
    --fd-border-strong: rgba(0, 0, 0, 0.5);
    --fd-text-secondary: var(--fd-text-primary);
  }

  html[data-theme="dark"] {
    --fd-border: rgba(255, 255, 255, 0.5);
    --fd-border-strong: rgba(255, 255, 255, 0.7);
  }

  .lesson-nav-item,
  .list-group-item,
  .accordion-item {
    border-width: 2px;
  }
}

/* ====== IMPRESSION ====== */
@media print {
  .formation-lessons-sidebar,
  .fab-container,
  .theme-toggle,
  .sidebar-toggle,
  .sidebar-overlay {
    display: none !important;
  }

  .formation-detail-container {
    margin-left: 0;
    width: 100%;
  }

  .lesson-content-wrapper {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  body {
    background: white !important;
  }
}