/* --- learn.css : Style structurel pour la section Apprendre --- */

/* Conteneur principal (Sidebar + Contenu) */
.course-wrapper {
  display: flex;
  max-width: 1300px;
  margin: 2rem auto;
  padding: 0 1rem;
  gap: 2rem;
  align-items: flex-start;
}

/* Le bloc de contenu principal */
/* IMPORTANT : On utilise une classe spécifique, pas de balise générique */
.course-content {
  flex-grow: 1;
  width: 100%;
  /* On annule explicitement les styles de "section" du global au cas où */
  max-width: none;
  box-shadow: none;
  background: transparent;
  border: none;
  padding: 0;
}

/* --- SIDEBAR --- */
.course-sidebar {
  width: 280px;
  background: #1e2024;
  border: 1px solid #383c44;
  border-radius: 12px;
  padding: 1.5rem;
  flex-shrink: 0;
  position: sticky;
  top: 90px; /* Sous le header */
}

.sidebar-title {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #383c44;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.course-menu {
  list-style: none;
  padding: 0;
}
.course-menu li {
  margin-bottom: 0.5rem;
}
.course-menu a {
  display: block;
  color: #b9bbbe;
  text-decoration: none;
  padding: 10px 15px;
  border-radius: 6px;
  transition: all 0.2s;
  font-size: 0.95rem;
}
.course-menu a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  transform: translateX(5px);
}
.course-menu a.active {
  background: rgba(0, 217, 246, 0.1);
  color: #00d9f6;
  border-left: 3px solid #00d9f6;
  font-weight: bold;
}

/* --- STYLE DU HUB (Les cartes larges dans Opening.html) --- */
.hub-card {
  background: #24262b;
  border: 1px solid #383c44;
  border-radius: 12px;
  padding: 3rem;
  width: 100%;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.hub-header h2 {
  color: #00d9f6;
  font-size: 2rem;
  margin-bottom: 0.5rem;
  border: none;
  background: none;
  box-shadow: none;
  padding: 0;
  display: block;
}
/* Annulation du hover global sur les h2 */
.hub-header h2:hover {
  transform: none;
  box-shadow: none;
  border: none;
}

.principle-section {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.principle-text {
  flex: 1;
}
.principle-text h3 {
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  border: none;
  text-align: left;
}

/* Blocs visuels */
.board-mini {
  width: 120px;
  height: 120px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  border: 2px solid #383c44;
}

.move-box {
  background: rgba(255, 255, 255, 0.05);
  border-left: 4px solid #00d9f6;
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 0 6px 6px 0;
}
.move-box strong {
  color: #fff;
  display: block;
  margin-bottom: 5px;
}
.move-box span {
  color: #00d9f6;
  font-family: monospace;
  font-size: 1.1rem;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .course-wrapper {
    flex-direction: column;
  }
  .course-sidebar {
    width: 100%;
    position: relative;
    top: 0;
    margin-bottom: 1rem;
  }
  .principle-section {
    flex-direction: column-reverse;
    text-align: center;
  }
  .principle-text h3 {
    text-align: center;
  }
}