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

    body {
      font-family: 'Segoe UI', sans-serif;
      background: linear-gradient(to right, #005aa7, #fffde4);
      color: #333;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    header {
      background-color: #004080;
      padding: 1rem 2rem;
    }

    .header-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      max-width: 1400px;
      margin: 0 auto;
    }

    .univ-name {
      color: white;
      font-size: 1.5rem;
      font-weight: bold;
    }

    .logo {
      height: 70px;
      object-fit: contain;
    }

    .hero {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 3rem 2rem;
      background: rgba(255, 255, 255, 0.75); /* transparence légère */
      animation: fadeIn 1.2s ease-out;
    }

    .hero h1 {
      font-size: 2rem;
      margin-bottom: 1rem;
      color: #003366;
    }

	
	.separator {
      width: 75%;
      height: 2px;
      background-color: rgba(0, 0, 0, 0.2);
      margin: 1rem auto;
      border-radius: 2px;
    }

    .user-access-container {
      background-color: #fff;
      border-radius: 10px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      padding: 1.5rem 1.2rem;   /* réduit l’espace interne */
      margin: 1rem auto;      /* réduit l’espace autour */
      width: 50%;
    }
.user-access > div {
  flex: 1;
  display: flex;
  justify-content: center;
}

.user-access > div {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

    .user-access-title {
      font-size: 1.3rem;
      font-weight: bold;
      color: #004080;
      margin-bottom: 1rem;
    }

    .user-access {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    @media (min-width: 768px) {
      .user-access {
        flex-direction: row;
      }
    }

    .user-access > div {
      flex: 1;
    }

    .btn,
    .dropbtn {
      background: #004080;
      color: white;
      padding: 0.75rem 1.5rem;
      border: none;
      border-radius: 5px;
      font-weight: bold;
      font-size: 1rem;
      font-family: 'Segoe UI', sans-serif;
      height: 50px;
      width: 75%;
      cursor: pointer;
      transition: background 0.3s ease;
      text-decoration: none;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .btn:hover,
    .dropdown:hover .dropbtn {
      background: #002f5e;
    }

    .dropdown {
      position: relative;
      width: 100%;
    }

    .dropdown-content {
      display: none;
      position: absolute;
      background-color: white;
      box-shadow: 0px 8px 16px rgba(0, 0, 0, 0.2);
      z-index: 1;
      top: 100%;
      left: 0;
      width: 100%;
    }

    .dropdown-content a {
      color: #004080;
      padding: 12px 16px;
      text-decoration: none;
      display: block;
      font-weight: bold;
    }

    .dropdown-content a:hover {
      background-color: #f1f1f1;
    }

    .dropdown:hover .dropdown-content {
      display: block;
    }

    footer {
      background: #003366;
      color: white;
      text-align: center;
      padding: 1rem;
      font-size: 0.9rem;
    }

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

    /* ----------------- MEDIA QUERIES RESPONSIVE ---------------- */

    @media all and (max-width: 360px) {
      .hero h1 { font-size: 1.3rem; }
      .btn, .dropbtn, .dropdown-content { font-size: 0.85rem; }
      .user-access-container { width: 90%; }
    }

    @media all and (min-width: 360px) and (max-width: 576px) {
      .hero h1 { font-size: 1.5rem; }
      .btn, .dropbtn, .dropdown-content { font-size: 0.9rem; }
      .user-access-container { width: 90%; }
    }

    @media all and (min-width: 576px) and (max-width: 768px) {
      .hero h1 { font-size: 1.8rem; }
      .user-access-container { width: 80%; }
    }

    @media all and (min-width: 768px) and (max-width: 992px) {
      .hero h1 { font-size: 2.2rem; }
      .user-access-container { width: 70%; }
    }

    @media all and (min-width: 992px) and (max-width: 1200px) {
      .hero h1 { font-size: 2.5rem; }
	  
    }

    @media all and (min-width: 1200px) and (max-width: 1400px) {
      .hero h1 { font-size: 2.7rem; }
	  
    }

    @media all and (min-width: 1400px) and (max-width: 1600px) {
      .hero h1 { font-size: 3rem; }
	  
    }

    @media all and (min-width: 1600px) and (max-width: 1800px) {
      .hero h1 { font-size: 3.2rem; }
	  
    }

    @media all and (min-width: 1800px) {
      .hero h1 { font-size: 3.5rem; }
	 
    }