body {
      margin: 0;
      font-family: "Poppins", sans-serif;
      background-color: #fff;
      color: #333;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    /* CONTENU CENTRAL */
    main {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: #f8f9fa;
      padding: 40px 0;
    }

    .login-box {
      background-color: white;
      border-radius: 12px;
      box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
      width: 380px;
      padding: 40px 30px;
      text-align: center;
    }

    .login-box h2 {
      color: #d62828;
      margin-bottom: 25px;
    }

    input {
      width: 100%;
      padding: 12px;
      margin: 10px 0;
      border-radius: 8px;
      border: 1px solid #ccc;
      font-size: 1em;
    }

    button.login {
      width: 100%;
      background-color: #001b6b;
      color: white;
      border: none;
      padding: 12px;
      border-radius: 8px;
      font-size: 1em;
      cursor: pointer;
      transition: background 0.3s ease;
      margin-top: 10px;
    }

    button.login:hover {
      background-color: #0042b8;
    }

    .register-link {
      margin-top: 15px;
      display: block;
      color: #d62828;
      text-decoration: none;
      font-weight: bold;
      cursor: pointer;
    }

    .register-link:hover {
      text-decoration: underline;
    }

    /* POP-UP (MODAL) */
    .modal {
      display: none;
      position: fixed;
      z-index: 2000;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0,0,0,0.6);
      justify-content: center;
      align-items: center;
    }

    .modal-content {
      background-color: #fff;
      padding: 30px 40px;
      border-radius: 12px;
      width: 400px;
      box-shadow: 0 0 20px rgba(0,0,0,0.3);
      text-align: center;
      animation: fadeIn 0.3s ease;
    }

    .modal-content h3 {
      color: #d62828;
      margin-bottom: 20px;
    }

    .close {
      position: absolute;
      right: 20px;
      top: 20px;
      font-size: 1.5em;
      color: #333;
      cursor: pointer;
    }

    .close:hover {
      color: #d62828;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: scale(0.95); }
      to { opacity: 1; transform: scale(1); }
    }

    .lien-mot-de-passe {
        display: inline-block;
        margin-top: 18px;
        font-size: 0.9em;
        color: #001b6b;
        text-decoration: none;
        position: relative;
        transition: color 0.3s ease;
    }

    .lien-mot-de-passe::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: -3px;
        width: 100%;
        height: 2px;
        background-color: #d62828;
        transform: scaleX(0);
        transform-origin: right;
        transition: transform 0.3s ease;
    }

    .lien-mot-de-passe:hover {
        color: #d62828;
    }

    .lien-mot-de-passe:hover::after {
        transform: scaleX(1);
        transform-origin: left;
    }