.gb-strengths {
  text-align: center;
  padding: 60px 20px;
  background: #ffffff; /* Fond blanc */
}

.gb-strengths h2 {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.gb-strengths .subtitle {
  font-size: 1.1rem;
  color: #666;
  margin-bottom: 40px;
}

/* Grille fixe : 3 colonnes */
.strengths-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
  max-width: 1100px;
  margin: 0 auto;
}

/* Vignettes avec fond gris clair */
.strength-card {
  background: #f5f5f5; /* Inversion : vignette grise */
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  transition: transform .2s ease, box-shadow .2s ease;
}

.strength-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

/* Responsive : 1 colonne sur mobile */
@media (max-width: 768px) {
  .strengths-grid {
    grid-template-columns: 1fr;
  }
}