Integrate Mightyslider Ken Burns on front-page

Hi,

I would like to integrate the Mighty Slider Ken Burns on my front-page fullscreen, with transparent header menu and logo on top of it.
I have installed a front-page.php in the template root folder (see source code below).
Unfortunately, unlike in other themes, the slider does not cover the whole screen but starts below the header.
How can I fix this?

Thank you and best regards,
Holger

front-page.php:

<?php /*
This page is used to display the static frontpage.
*/

// Fetch theme header template
get_header();
/*
require(‘fullscreen-slider-with-kenburns-effect.html’);*/
?>
<iframe src=”fullscreen-slider-with-kenburns-effect.html” style=”display:block; border:none; height:100vh; width:100%; “></iframe>

<!– This page is generated outside of WP by: /wp-content/themes/CURRENT-THEME/home.php –>
<!– Your HTML Code Here –>