/* Styles académiques pour la section recherches */
:root {
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --accent-color: #e74c3c;
  --success-color: #27ae60;
  --warning-color: #f39c12;
  --dark-color: #2c3e50;
  --light-color: #ecf0f1;
  --text-color: #34495e;
  --border-radius: 8px;
  --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Georgia', 'Times New Roman', serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  margin: 0;
  padding: 20px;
  min-height: 100vh;
  color: var(--text-color);
  line-height: 1.6;
}

/* Container principal */
.research-container {
  max-width: 1200px;
  margin: 0 auto;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  overflow: hidden;
}

/* Header académique */
.research-header {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 3rem 2rem;
  text-align: center;
  position: relative;
}

.research-title {
  font-size: 2.8rem;
  margin: 0 0 1rem 0;
  font-weight: 400;
  letter-spacing: -0.5px;
}

.research-subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
  margin: 0;
  font-style: italic;
}

.research-affiliation {
  font-size: 0.9rem;
  opacity: 0.8;
  margin-top: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Navigation des sections */
.research-nav {
  background: var(--light-color);
  padding: 1rem 2rem;
  border-bottom: 1px solid #bdc3c7;
}

.nav-tabs {
  display: flex;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: center;
  flex-wrap: wrap;
}

.nav-tab {
  background: white;
  border: 1px solid #bdc3c7;
  border-bottom: none;
  padding: 12px 24px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  color: var(--text-color);
  text-decoration: none;
  position: relative;
}

.nav-tab:first-child {
  border-radius: var(--border-radius) 0 0 0;
}

.nav-tab:last-child {
  border-radius: 0 var(--border-radius) 0 0;
}

.nav-tab.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.nav-tab:hover:not(.active) {
  background: #f8f9fa;
  transform: translateY(-2px);
}

/* Contenu principal */
.research-content {
  padding: 3rem 2rem;
}

.section {
  margin-bottom: 4rem;
  display: none; /* Masquer toutes les sections par défaut */
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s ease;
}

.section.active-section {
  display: block; /* Afficher seulement la section active */
  opacity: 1;
  transform: translateY(0);
}

.section-title {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--secondary-color);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent-color);
}

/* Grille des projets */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background: white;
  border: 1px solid #e0e0e0;
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  border-color: var(--secondary-color);
}

.project-header {
  padding: 1.5rem;
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  border-bottom: 1px solid #e0e0e0;
}

.project-type {
  display: inline-block;
  background: var(--secondary-color);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
}

.project-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0 0 0.5rem 0;
  color: var(--primary-color);
}

.project-description {
  color: #666;
  font-size: 0.95rem;
  line-height: 1.5;
}

.project-body {
  padding: 1.5rem;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: #666;
}

.project-status {
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
}

.status-en-cours {
  background: #fff3cd;
  color: #856404;
}

.status-publie {
  background: #d4edda;
  color: #155724;
}

.status-soumis {
  background: #d1ecf1;
  color: #0c5460;
}

/* Style pour les listes de jeux */
.game-features {
  list-style: disc;
  padding-left: 1.2rem;
  margin: 0;
}

.game-features li {
  padding: 0.3rem 0;
  color: #666;
}

/* Publications */
.publication-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.publication-item {
  background: white;
  border: 1px solid #e0e0e0;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: var(--transition);
}

.publication-item:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-color: var(--secondary-color);
}

.publication-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.publication-authors {
  color: #666;
  margin-bottom: 0.5rem;
  font-style: italic;
}

.publication-journal {
  color: var(--secondary-color);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.publication-abstract {
  color: #555;
  font-size: 0.9rem;
  line-height: 1.5;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #f0f0f0;
}

/* Ressources */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.resource-card {
  background: white;
  border: 1px solid #e0e0e0;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
  text-align: center;
}

.resource-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  border-color: var(--secondary-color);
}

.resource-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.resource-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.resource-description {
  color: #666;
  font-size: 0.9rem;
  line-height: 1.4;
}

/* Équipe */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.team-member {
  background: white;
  border: 1px solid #e0e0e0;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
}

.team-member:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  border-color: var(--secondary-color);
}

.member-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 1rem auto;
  background: var(--light-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--primary-color);
}

.member-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.member-title {
  color: var(--secondary-color);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.member-bio {
  color: #666;
  font-size: 0.85rem;
  line-height: 1.4;
}

/* Responsive */
@media (max-width: 768px) {
  .research-header {
    padding: 2rem 1rem;
  }

  .research-title {
    font-size: 2rem;
  }

  .research-content {
    padding: 2rem 1rem;
  }

  .nav-tabs {
    flex-direction: column;
  }

  .nav-tab {
    border-radius: 0;
    border-bottom: 1px solid #bdc3c7;
  }

  .nav-tab:first-child {
    border-radius: var(--border-radius) var(--border-radius) 0 0;
  }

  .nav-tab:last-child {
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    border-bottom: none;
  }

  .projects-grid,
  .resources-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

/* Citations académiques */
.citation {
  background: #f8f9fa;
  border-left: 4px solid var(--secondary-color);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  font-style: italic;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.citation-author {
  display: block;
  margin-top: 0.5rem;
  font-weight: 600;
  color: var(--primary-color);
  font-style: normal;
  font-size: 0.9rem;
}

/* Statistiques de recherche */
.research-stats {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  margin: 2rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  text-align: center;
}

.stat-item {
  padding: 1rem;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 1px;
}