Audiophile ecommerce website - React, Mongodb-realm, Sass

It is one of the complex challenges that i have taken on Frontend Mentor, which i used to learn how to work with Mongodb-realm. I have little knowledge on backend, Realm makes it easy to integrate the backend and the frontend. Some minor changes where made to simplify the project a bit - the mobile navigation in particular and the confirmation modal.

Fetching data from realm is taking about 5 seconds to load on the Frontend, I used a modal box to compensate for the time delay.

An interesting aspect that i learned was to hide fieldsets on a form until the top ones have filled and are valid - this can be done with the css below

/* Hide the fieldset after an invalid fieldset */
fieldset:invalid~fieldset {
    display: none;
}

• some omissions and improvements may be found and such feedback is welcome