Looks pretty nice! I like the responsiveness of the hero phone image and also how you've made the photo of the author transition smoothly to the different positions.
I would recommend taking a look at an ultra wide screen size. Some of the green decorative icons go off the view and some elements begin to not look as visually appealing being too wide. It could be worth looking into setting a max-width for these elements.
However, in the more standard screen sizes, it looks pretty good!
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