Custom PDF Export issue with bottom-left

I noticed that on the title page (in the PDF export) the text in the bottom left is missing. So I put background colors in the bottom corners. On the title page it looks like this:

And on all the other pages like this:

I’ve already tried it with margin-left: 5cm;
Can I make it smaller and if so how?

content: "Some random text";
font-size: 11pt !important;
color: #26C9FF;
font-family: ConfluenceInstalledFont, Helvetica, Arial, sans-serif;
background-color: green;

Thank You