Sign-up Form using HTML, CSS and JavaScript

Greetings! you have done a great job 😎

You can center the content in the center of the screen by applying the following to your body:

body {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    background-image: url(bg-intro-desktop.png);
    background-size: cover;
    background-repeat: no-repeat;
    background-color: hsl(0, 100%, 74%);
    /* max-width: 1440px;  I don't see it necessary */
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 20px; /* Separate the main from the footer */
    min-height: 100vh;
}