How to increase font size in HEADING 1?

Site URL: http://www.adrianfisk.com

Hi - How can I dramatically increase the size of the Heading 1 font?

I want a large font that goes right across the page when viewed in desktop. Obviously the CSS may need to be different for mobiles otherwise it wont fit on the screen. As you'll see from my site I currently have created large 200 pix font in Photoshop and overlayed onto the image and then uploaded that to SS. The issue with this is that it looks ok on desktop though looks poor on a mobile and the font is so large you only see 2 letters!

Is there a way to change font size of headert 1 seperately for desktop and mobile?

Any help much appreciated!

You can add this code to Home > Design > Custom CSS to change heading 1 size on mobile

@media screen and (max-width:767px) {
	h1 {font-size: 20px;}
}

SO helpful. Thank you!