:root {
  --bg-darker: #1a1e23;
  --bg-dark: #22262d;
  --bg-card: #2a2f38;
  --border-color: #3b424d;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;

  /* Accents du Thème */
  --primary: #22c55e;
  --primary-hover: #16a34a;
  --primary-bg: rgba(34, 197, 94, 0.1);

  --danger: #ef4444;
  --danger-hover: #dc2626;

  --font-sans: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

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

body {
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-darker);
  min-height: 100vh;
}

/* =========================================
   UTILITAIRES
   ========================================= */
.hidden {
  display: none !important;
}
.active {
  display: block;
}
.w-100 {
  width: 100%;
}
.text-center {
  text-align: center;
}
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.flex-gap {
  display: flex;
  gap: 12px;
}
.mb-2 {
  margin-bottom: 0.5rem;
}
.mb-4 {
  margin-bottom: 1.5rem;
}
.mt-4 {
  margin-top: 1.5rem;
}
.p-0 {
  padding: 0 !important;
}
.text-muted {
  color: var(--text-muted);
}
.text-main {
  color: var(--text-main);
}
.text-sm {
  font-size: 0.9rem;
}
.text-primary {
  color: var(--primary);
}
.text-danger {
  color: var(--danger);
}
.font-bold {
  font-weight: 600;
  text-transform: uppercase;
}
.mono {
  font-family: var(--font-mono);
}

/* =========================================
   BOUTONS
   ========================================= */
button {
  font-family: var(--font-sans);
  font-weight: 500;
  border-radius: 6px;
  padding: 10px 24px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: 0.2s;
  background: transparent;
  color: var(--text-main);
}
.btn-primary {
  background: var(--primary);
  color: #000;
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}
.btn-primary:disabled {
  background: #374151;
  color: var(--text-muted);
  cursor: not-allowed;
}
.btn-outline {
  border-color: var(--text-muted);
  color: var(--text-main);
}
.btn-outline:hover:not(:disabled) {
  border-color: #fff;
  color: #fff;
}
.btn-outline:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-outline-primary {
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline-primary:hover {
  background: var(--primary-bg);
}
.btn-outline-danger {
  border-color: var(--danger);
  color: var(--danger);
}
.btn-outline-danger:hover {
  background: rgba(239, 68, 68, 0.1);
}
.btn-icon {
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-muted);
}
.btn-icon:hover {
  border-color: var(--text-main);
  color: var(--text-main);
}
.btn-large {
  padding: 16px 32px;
  font-size: 1.1rem;
}

/* =========================================
   NAVIGATION GLOBALE & TABLEAUX
   ========================================= */
.top-nav {
  padding: 20px 5%;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border-color);
}
.brand {
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.table-container {
  background: var(--bg-dark);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  max-width: 1100px;
  margin: 0 auto;
}
.modern-table {
  border-collapse: collapse;
  text-align: left;
}
.modern-table th,
.modern-table td {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
}
.modern-table th {
  background: var(--bg-darker);
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* =========================================
   CONTENU DE LA PAGE D'ACCUEIL (LANDING PAGE)
   ========================================= */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 5%;
}
.landing-section {
  padding: 80px 0;
}
.section-title {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text-main);
}
.badge-subtle {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero-section {
  padding: 100px 5%;
  max-width: 800px;
  margin: 0 auto;
}
.hero-title {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 30px;
  border-radius: 8px;
  transition: 0.2s ease-in-out;
}
.feature-card:hover {
  border-color: #6b7280;
  transform: translateY(-2px);
}
.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 20px;
  display: block;
}

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}
.step-card {
  position: relative;
  padding: 30px;
  border: 1px dashed var(--border-color);
  border-radius: 8px;
  background: rgba(42, 47, 56, 0.3);
  text-align: center;
}
.step-num {
  position: absolute;
  top: 10px;
  left: 15px;
  font-size: 3rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.03);
  font-family: var(--font-mono);
}

.main-footer {
  padding: 30px 0;
  margin-top: 60px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-dark);
}

/* =========================================
   DISPOSITION DU QUIZ & BARRE LATÉRALE
   ========================================= */
.quiz-layout {
  display: flex;
  height: 100vh;
  background: var(--bg-darker);
}

.quiz-sidebar {
  width: 340px; /* Augmenté pour s'adapter parfaitement à la grille matricielle */
  background: var(--bg-dark);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden; /* Empêche le défilement global de la barre latérale */
}
.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

/* Grille Matricielle Fixe (Navigation des questions) */
.nav-grid {
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr); /* 4 colonnes */
  gap: 12px;
  flex: 1;
  align-content: start; /* Empêche les cases de s'étirer verticalement */
  overflow: hidden; /* Masque les barres de défilement internes */
}
.nav-box {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  cursor: pointer;
  background: transparent;
  transition: 0.2s;
}
.nav-box:hover {
  border-color: var(--text-main);
}
.nav-box.current {
  border-color: var(--primary);
  color: var(--primary);
  font-weight: bold;
  background: rgba(34, 197, 94, 0.05);
}
.nav-box.correct {
  background: var(--primary);
  color: #000;
  border-color: var(--primary);
  font-weight: bold;
}
.nav-box.wrong {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
  font-weight: bold;
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid var(--border-color);
}

/* =========================================
   ESPACE DE TRAVAIL PRINCIPAL DU QUIZ
   ========================================= */
.quiz-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
}
.quiz-header {
  padding: 20px 40px;
  border-bottom: 1px solid var(--border-color);
}
.timer-display {
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 6px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.quiz-content {
  flex: 1;
  padding: 40px;
  overflow-y: auto;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.question-box {
  background: var(--bg-card);
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}
.question-text {
  font-size: 1.1rem;
  font-weight: 400;
  line-height: 1.6;
}

/* Grille d'Options 2x2 */
.options-2x2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.option-card {
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 16px 20px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  transition: 0.2s;
}
.option-card:hover {
  background: rgba(255, 255, 255, 0.02);
  border-color: #6b7280;
}
.option-card.selected {
  border-color: var(--primary);
  background: var(--primary-bg);
}

/* Bouton Radio Personnalisé */
.radio-circle {
  width: 20px;
  height: 20px;
  border: 2px solid #6b7280;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.option-card.selected .radio-circle {
  border-color: var(--primary);
}
.option-card.selected .radio-circle::after {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
}

/* Explications & Avertissements */
.explanation-container {
  margin-top: 24px;
}
.explanation-card {
  background: var(--bg-dark);
  border: 1px solid var(--primary);
  padding: 20px;
  border-radius: 6px;
}
.quiz-footer {
  padding: 20px 40px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-darker);
}

/* =========================================
   FENÊTRES MODALES
   ========================================= */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-card {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 90%;
  max-width: 420px;
  padding: 30px;
}
.input-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.input-group input {
  width: 100%;
  padding: 12px 16px;
  border-radius: 6px;
  background: var(--bg-darker);
  border: 1px solid var(--border-color);
  color: #fff;
}
.input-group input:focus {
  outline: none;
  border-color: var(--primary);
}
.score-circle {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  border-radius: 50%;
  border: 4px solid var(--primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

/* =========================================
   RESPONSIVITÉ MOBILE
   ========================================= */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  .landing-section {
    padding: 40px 0;
  }
  .features-grid,
  .workflow-grid {
    grid-template-columns: 1fr;
  }
  .main-footer .flex-between {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }
  .options-2x2 {
    grid-template-columns: 1fr;
  } /* Aligne les options verticalement sur les écrans mobiles */

  /* Sur mobile, empile la disposition globale du quiz */
  .quiz-layout {
    flex-direction: column;
  }
  .quiz-sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .nav-grid {
    overflow-y: auto;
    max-height: 200px;
  } /* Permet le défilement sur mobile si nécessaire */
}

/* =========================================
   CORRECTIFS : ALIGNEMENT BARRE DE NAVIGATION & ÉTATS DES RÉPONSES
   ========================================= */

/* 1. Corrige l'alignement entre l'en-tête de la barre latérale et l'en-tête principal */
.sidebar-header { 
    height: 76px; 
    display: flex; 
    align-items: center; 
    padding: 0 20px; 
    border-bottom: 1px solid var(--border-color); 
}
.quiz-header { 
    height: 76px; 
    display: flex; 
    align-items: center; 
    padding: 0 40px; 
    border-bottom: 1px solid var(--border-color); 
    justify-content: space-between; 
}

/* 2. États pour les options répondues (Opacité, Désactivation du survol, Couleurs Rouge/Vert) */
.options-2x2.answered .option-card {
    pointer-events: none; /* Désactive le survol et les clics */
    opacity: 0.4;         /* Atténue l'affichage des options non sélectionnées */
}
.options-2x2.answered .option-card.show-correct,
.options-2x2.answered .option-card.show-wrong {
    opacity: 1;           /* Maintient les options validées ou correctes bien visibles */
}

/* Style de la Réponse Correcte */
.option-card.show-correct {
    border-color: var(--primary);
}
.option-card.show-correct .radio-circle {
    border-color: var(--primary);
}
.option-card.show-correct .radio-circle::after {
    content: ""; 
    width: 10px; 
    height: 10px; 
    background: var(--primary); 
    border-radius: 50%; 
}

/* Style de la Réponse Incorrecte (Rouge Complet) */
.option-card.show-wrong {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}
.option-card.show-wrong .radio-circle {
    border-color: var(--danger);
}
.option-card.show-wrong .radio-circle::after {
    content: ""; 
    width: 10px; 
    height: 10px; 
    background: var(--danger); 
    border-radius: 50%; 
}