Intro Component with sign-up form

Nice work on this!

Maybe use more readable class name for &__h1-> &__title and &__p-> &__description

On the JS side there could need some refacto on the error handling part.

Maybe wrap on the html side the errors like so:

<div data-error='firstname'  class='error'>
    <img id="img1" src="./images/icon-error.svg" alt="error-icon" />
    <span>First Name cannot be empty</span>
</div>

and then on the js side use a validator function that will map the error depending of the form data provided, and add the error class with the right styles depending of the right data-attribute (I don't know if I am clear ahah)

reduce width of form it looks like stretch out and you have change the color of placeholder to red and by the good work