center align for content?

If you visit my site here;
www.dbrenewables.info

You can see that the content below my header isn't aligned properly? I've tryed align-content: center; and text-align: center and nothing will change its position, any ideas what I do please?

Thanks

Hi,
if you thought about modules "Experienced" "Diverse" & "Prepared" - because they have width 30% not 33% as they should have.

30% + 30% + 30% = 90% and about 10% on right side.
So if you will use 33% for each it should help to get 99%.

Second solution to add more paddings between those box'es.

Ahh okay!
Thank you very much