When creating a new page, select the Blank/Empty template.
From the left panel, find and add a Container element to your page.
With the container selected, add a Custom HTML element inside it. You’ll find this in the left panel under the components list.
Click on the Custom HTML block you added. On the right side of the screen, a Custom HTML Settings panel will appear. Paste your HTML code directly into that panel.
Once your code is added, click Preview (top right) to see how your page looks. When you’re satisfied with it, click Save Changes to publish your updates.
A couple of things worth noting:
<link> tag is included at the top of your HTML. Selar does not load external fonts automatically.