body {
      margin: 0;
      padding: 0;
      background-image: url('../assets/images/pergamena.png');
      background-size: cover;
      background-repeat: no-repeat;
      background-position: center;
      font-family: 'Uncial Antiqua', cursive;
      color: #3b2e2a;
    }

    .login-container {
      height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
      background-color: rgba(255, 255, 255, 0.1); /* leggero overlay */
    }

    .login-card {
      display: flex;
      background-color: rgba(255, 255, 255, 0.9);
      border-radius: 15px;
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
      overflow: hidden;
      max-width: 850px;
      width: 100%;
    }

    .logo-section {
      flex: 1;
      background-color: #e6dfd3;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }

    .logo-img {
      max-width: 100%;
      max-height: 300px;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    }

    .form-section {
      flex: 1;
      padding: 40px 30px;
    }

    .form-signin-heading {
      text-align: center;
      margin-bottom: 30px;
      font-size: 2rem;
    }

    .form-control {
      margin-bottom: 15px;
    }

    .btn-primary {
      background-color: #5a3e36;
      border-color: #4d322d;
    }

    .btn-primary:hover {
      background-color: #6f4b41;
    }

    .register-link {
      text-align: center;
      margin-top: 20px;
      font-size: 0.95rem;
    }

    .register-link a {
      color: #5a3e36;
      text-decoration: underline;
    }
   .btn-primary {
      position: relative;
      overflow: hidden;
      background-color: #5a3e36;
      border-color: #4d322d;
      transition: transform 0.2s ease;
      z-index: 1;
    }

    .btn-primary:hover {
      transform: scale(1.03);
    }

    /* Magia scintillante */
    .btn-primary::before {
      content: "";
      position: absolute;
      top: 0;
      left: -75%;
      width: 50%;
      height: 100%;
      background: linear-gradient(
        120deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.5) 50%,
        rgba(255, 255, 255, 0) 100%
      );
      transform: skewX(-20deg);
      animation: shimmer 2.5s infinite;
      z-index: 0;
    }

    @keyframes shimmer {
      0% {
        left: -75%;
      }
      100% {
        left: 125%;
      }
    }