Soft Rejected - Spacing and alighment & Low contrast

Hi Guys.
I have submitted a HTML template in themeforest. It got soft reject.

Reviewer said:

  1. SPACING AND ALIGNMENT:
    There are spacing and alignment issues in this item. Please make sure that all elements are aligned properly and spacing is consistent from section to section. Here are some articles with more information regarding negative space and proper spacing: http://webdesign.tutsplus.com/articles/using-white-space-or-negative-space-in-your-designs--webdesign-3401,\ http://webdesign.tutsplus.com/articles/adding-space-to-your-designs--webdesign-14836

  2. LOW CONTRAST:
    Please increase the visual contrast of the following elements, which will drastically improve legibility and readability. Ref: https://www.nngroup.com/articles/low-contrast/

Here our demo: demo link

Can anybody show me what should I change? how they check Spacing and alignment of a template?

Thanks a lot!!

You should increase padding in event search filter & event meta in Upcoming section.
And in your slider, text is quite hard to read, try another image or use a darker layer