Why my HTML item is rejected

I am new at Themeforest , I submitted a HTML Portfolio Item 2 days ago , after one day envato send this mail with [ThemeForest] Your item, Salman - Portfolio HTML Template, has been rejected.

" Thank you for your submission. We have completed our review of “Salman - Portfolio HTML Template” 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. "

my demo link: http://spinetheme.com/salman-preview

Why or What is need for aprove.
Same design and same style template approve by another authors but not my ?

hope some one replay .

I think it’s a little bit cramped, my advise you must put more white space.

thank you so much dear.
you mean , section padding need 100-120px, is it?