html, body {
      font-family: Arial, sans-serif;
      height: 100%;
      
    }
    .navbar {
      background-color: #0d6efd; /* Bleu principal */
    }
    .navbar-brand, .nav-link {
      color: white !important;
      font-weight: 500;
    }
    .navbar-brand span {
      color: red;
    }
    .hero {
      background: linear-gradient(rgba(13,110,253,0.8), rgba(13,110,253,0.8)), url("https://picsum.photos/1200/500?business") no-repeat center center;
      background-size: cover;
      color: white;
      padding: 100px 0;
      text-align: center;
    }
    .section-title {
      text-align: center;
      margin: 60px 0 40px;
      font-size: 28px;
      color: #0d6efd;
    }
    footer p {
      background-color: #0d6efd;
      color: white;
      text-align: center;
      padding: 20px 0;
      margin-top: 40px;
    }


 /* Style page about */
  .container_about {
      max-width: 800px;        /* largeur max du bloc */
      margin: 20px auto;       /* centrer horizontalement */
      padding: 20px;
      font-family: "Poppins", Arial, sans-serif;
      line-height: 1.6;
      color: #333;
  }

  .container_about h4 {
      text-align: left;        /* titre aligné à gauche */
      color: #222;
      margin-bottom: 10px;
  }

  .container_about p {
      text-align: justify;     /* texte aligné à gauche et à droite */
      margin-bottom: 15px;
  }

  .btn-lire {
      display: inline-block;
      background-color: #007bff;   /* couleur principale */
      color: #fff;                 /* texte blanc */
      padding: 10px 20px;
      border-radius: 25px;         /* bords arrondis */
      text-decoration: none;
      font-weight: 600;
      transition: all 0.3s ease;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  }

  .btn-lire:hover {
      background-color: #0056b3;   /* couleur au survol */
      transform: translateY(-2px); /* petit effet de levée */
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
  }

  /* Section partenaire */
.partenaires {
  background-color: #f8f9fa;
  padding: 60px 20px;
  text-align: center;
}

.partenaires h2 {
  font-size: 28px;
  color: #0d6efd;
  margin-bottom: 10px;
}

.partenaires .intro {
  max-width: 700px;
  margin: 0 auto 40px auto;
  color: #555;
  line-height: 1.6;
  font-size: 16px;
}

.partenaires-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 30px;
  align-items: center;
  justify-items: center;
}

/* Taille normale pour écrans larges */
.partenaire img {
  max-width: 130px;
  height: auto;
  filter: grayscale(0%);
  opacity: 0.8;
  transition: all 0.3s ease;
}

/* Effet au survol */
.partenaire img:hover {
  filter: grayscale(100%);
  opacity: 1;
  transform: scale(1.05);
}

/* 📱 Adaptation mobile */
@media (max-width: 768px) {
  .partenaires {
    padding: 40px 15px;
  }

  .partenaires h2 {
    font-size: 22px;
  }

  .partenaire img {
    max-width: 80px;  /* ✅ taille réduite sur mobile */
  }

  .partenaires-grid {
    gap: 20px;
  }
}