How to style the texts that iframe pulls?

Question

I’m using this code to get results from the lotteries, specifically the Mega Sena, and I need to style the text that the iframe brings. The result that iframe pulls is like XML, I’m not sure, but I need to take the characters that are appearing along with the text and leave only the text, then I need to style type center, put color in the text, change position, as if to diagram, I tried with CSS, but it didn’t work the styles in the text, only at the bottom of the text. If you can help me, I’d like to thank you.

This is my HTML code I use:

<iframe name="iframe1" id="iframe1" src="http://api.onemidia.tv.br/igor.php" 
        frameborder="0" border="0" cellspacing="0"
        style="font-family: verdana;width: 100%; height: 100%;"></iframe>
<link rel="stylesheet" type="text/css" href="style.css"/>

And this is my CSS code that I use:

iframe{
	width: 100%;
	height: 100%;
	color: red;
	font-family: arial;
	background: #74E8B8;
}