/* ===== VARIABLES ===== */
    :root {
      --primary-blue: #0056A1;
      --secondary-blue: #003366;
      --accent-yellow: #FFD700;
      --white: #FFFFFF;
      --light-gray: #F5F7FA;
      --text-dark: #333333;
      --text-light: #666666;
      --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
      --transition: all 0.3s ease;
    }

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

    body { 
      font-family: 'Inter', Arial, sans-serif; 
      background-color: var(--light-gray); 
      color: var(--text-dark);
      line-height: 1.6;
    }

    /* ===== HEADER ===== */
    header { 
      background: linear-gradient(135deg, var(--white) 0%, #f8fafc 100%);
      box-shadow: var(--shadow);
      position: fixed; 
      width: 100%; 
      top: 0; 
      z-index: 1000;
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(0, 86, 161, 0.1);
    }

    nav { 
      max-width: 1400px; 
      margin: 0 auto; 
      display: flex; 
      justify-content: space-between; 
      align-items: center; 
      padding: 0 20px; 
      height: 80px;
    }

    /* ===== LOGO ===== */
    .logo { 
      display: flex; 
      align-items: center; 
      gap: 12px;
      text-decoration: none;
    }

.logo-img { 
  height: 50px; 
  width: auto;
  transition: var(--transition);
  /* Essayer ces propriétés pour supprimer l'arrière-plan */
  mix-blend-mode: multiply;
  filter: contrast(1.1);
}

    .logo:hover .logo-img {
      transform: scale(1.05);
    }

    .logo-text { 
      font-weight: 800; 
      font-size: 1.8rem; 
      color: var(--primary-blue);
      letter-spacing: -0.5px;
    }

    .logo-text span {
      color: var(--accent-yellow);
    }

    .logo-tagline {
      font-size: 0.7rem;
      color: var(--text-light);
      font-weight: 400;
      margin-top: -2px;
      letter-spacing: 0.5px;
    }

    /* ===== NAVIGATION ===== */
    .nav-links { 
      display: flex; 
      align-items: center;
      gap: 5px;
    }

    .nav-link { 
      text-decoration: none; 
      color: var(--text-dark);
      font-weight: 500;
      padding: 12px 20px;
      border-radius: 8px;
      transition: var(--transition);
      position: relative;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.95rem;
    }

    .nav-link:hover {
      color: var(--primary-blue);
      background: rgba(0, 86, 161, 0.05);
    }

    .nav-link.active {
      color: var(--primary-blue);
      background: rgba(0, 86, 161, 0.1);
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 2px;
      background: var(--accent-yellow);
      transition: var(--transition);
      transform: translateX(-50%);
    }

    .nav-link:hover::after,
    .nav-link.active::after {
      width: 70%;
    }

    .nav-cta {
      background: var(--accent-yellow);
      color: var(--primary-blue) !important;
      padding: 12px 25px;
      border-radius: 8px;
      font-weight: 600;
      margin-left: 10px;
      border: 2px solid transparent;
    }

    .nav-cta:hover {
      background: #ffed4a;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 215, 0, 0.3);
    }

    .nav-cta::after {
      display: none;
    }

    /* ===== MOBILE MENU ===== */
    .mobile-btn { 
      display: none; 
      background: none; 
      border: none; 
      cursor: pointer; 
      padding: 8px;
      border-radius: 6px;
      transition: var(--transition);
      flex-direction: column;
      gap: 4px;
    }

    .mobile-btn:hover {
      background: rgba(0, 86, 161, 0.1);
    }

    .mobile-line {
      width: 25px;
      height: 2px;
      background: var(--primary-blue);
      transition: var(--transition);
      border-radius: 2px;
    }

    .mobile-btn.active .mobile-line:nth-child(1) {
      transform: rotate(45deg) translate(6px, 6px);
    }

    .mobile-btn.active .mobile-line:nth-child(2) {
      opacity: 0;
    }

    .mobile-btn.active .mobile-line:nth-child(3) {
      transform: rotate(-45deg) translate(6px, -6px);
    }

    /* ===== MOBILE MENU DROPDOWN ===== */
    @media (max-width: 1024px) {
      .mobile-btn { 
        display: flex; 
      }
      
      .nav-links { 
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.4s ease;
        gap: 0;
      }

      .nav-links.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
      }

      .nav-link {
        padding: 15px 20px;
        border-radius: 6px;
        margin: 2px 0;
        width: 100%;
        justify-content: flex-start;
      }

      .nav-cta {
        margin: 10px 0 0 0;
        text-align: center;
        justify-content: center;
      }

      .nav-link::after {
        display: none;
      }
    }

    /* ===== ESPACE SOUS NAVBAR ===== */
    .nav-spacer { 
      height: 80px; 
    }

    /* ===== RESPONSIVE ===== */
    @media (max-width: 768px) {
      nav {
        height: 70px;
        padding: 0 15px;
      }

      .logo-text {
        font-size: 1.5rem;
      }

      .logo-tagline {
        display: none;
      }

      .logo-img {
        height: 40px;
      }

      .nav-spacer {
        height: 70px;
      }

      .nav-links {
        top: 70px;
      }
    }

    @media (max-width: 480px) {
      .logo-text {
        font-size: 1.3rem;
      }

      .logo-img {
        height: 35px;
      }
    }

    /* ===== ANIMATION D'APPARITION ===== */
    @keyframes slideDown {
      from {
        opacity: 0;
        transform: translateY(-20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .nav-links.show .nav-link {
      animation: slideDown 0.4s ease forwards;
    }

    .nav-links.show .nav-link:nth-child(1) { animation-delay: 0.1s; }
    .nav-links.show .nav-link:nth-child(2) { animation-delay: 0.15s; }
    .nav-links.show .nav-link:nth-child(3) { animation-delay: 0.2s; }
    .nav-links.show .nav-link:nth-child(4) { animation-delay: 0.25s; }
    .nav-links.show .nav-link:nth-child(5) { animation-delay: 0.3s; }
    .nav-links.show .nav-link:nth-child(6) { animation-delay: 0.35s; }