Remove padding at top of blog post

Hi, I am trying to reduce the padding between my site header and blog title on individual blog pages. This is the code I've tried, without success:

/* Reduces padding between header and blog title */

.blog-item-wrapper .blog-side-by-side-item-wrapper {
  padding-top: 0px !important;
}

https://upwardpartners.squarespace.com/case-studies/?password=brian

I'd really appreciate any advice! 

@ellen_b add below code into CSS editor in the last of all code

.blog-item-wrapper {
    padding-top: 0 !important;
}

@sqsp_guru thank you!!