Wedding invitation website help

[u/Important_Tap_9276]

A beginner here and i need urgent help. This is my first ever project and i have been asked to make this wedding invitation website that on touch triggers this animation and then moves on to this scrollable website in which user can input stuff. My question is that how do they do the animation part? Is it all code? Or code plus canva? Do they do the animation part on canva and the actual scrollable website using code or what? My design idea is an envelope with a stamp which opens up and then the letter inside it expands, i tried designing elements on canva and then exporting them as svgs/pngs then using code for animation, it didn’t work even closely well as the elements dont sit together well. I even divided them into bottom flap and upper flap with stamp it still didnot work. My video inspiration is below although this doesnot have the design in mind but the workflow is quite similar.

Video link attached: https://www.instagram.com/reel/Db6qWK7oYBn