Brine Header and Menu Not Showing on Some Pages

My header and menu don't show up on non-homepage pages on my blog. What's causing this issue and how do I fix it? Thanks in advance for the help!

@aianekarla you should share url to check.

Here's the URL (the header doesn't show up on this page): https://www.aianekarla.com/resource-index

@aianekaria Add to HOME > DESIGN > CUSTOM CSS

body#collection-5b288e47aa4a996a2885534d section.Main-content {
   margin-top: -50px;
   padding-top: 50px;
}