hard reject for my Wordpress Theme

I had a hard reject for my WP theme.

Comment from email:

Thank you for your submission. We have completed our review of “Viva Veggie - Cafe & Restaurant WordPress Theme” and unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again.

We appreciate the effort and time you’ve put into creating your item. And we’d be happy to help make sure your next entry will meet our submission requirements. Here’s our advice:

Visit our forums and ask fellow authors for feedback. Our helpful community will be glad to lend a hand.

Check out this Help Center article to understand why and how items get rejected.

Remember you can get help, in the form of tutorials or skilled professionals, on Envato Tuts+ and Envato Studio.

We hope to see a new submission from you soon!

All the best!

Envato Quality team

This is my theme
What’s wrong with it? I don’t understand why hard rejected? Please if anyone can have a look and let me know my mistake(s) so I can fix it in next time.

I think it has a good start.
You should improve padding and margin, increasing & balancing them.
Dropdown menu design is too simple

Thanks, I will change dropdown menu. But what’s wrong with paddings and margins?