.signup-form {
      max-width: 500px;
      margin: 50px auto;
      padding: 20px;
      background-color: #fff;
      border: 1px solid #ddd;
      border-radius: 10px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }

    .signup-form h2 {
      text-align: center;
      margin-bottom: 20px;
    }

    .form-group label {
      font-weight: bold;
    }

    .btn-signup {
      width: 100%;
      padding: 10px;
      font-size: 18px;
      border-radius: 5px;
    }

    @media (max-width: 576px) {
      .signup-form {
        margin: 20px;
        padding: 15px;
      }
    }