Cant remove white space above footer

Style.css line 868

.theme_page {
width: 990px;
margin-left: auto;
margin-right: auto;
padding-bottom: 50px; <—— Change to 0
border-top: 8px solid #F0F0F0;
}

https://developer.mozilla.org/en-US/docs/Tools/Page_Inspector/How_to/Examine_and_edit_CSS

https://developers.google.com/web/tools/chrome-devtools/inspect-styles/