Made a copy of my site and the H1 font mysteriously changed

Site URL: https://www.aboydandhisblog.com

This is a weird one. 

A couple days ago, I purchased some CSS code and, being a novice, made a duplicate site to experiment on so I wouldn't mess up my existing site. For some reason, the act of doing this changed my H1 font from League Spartan, which I use in all my headings, to...something else. H2, H3, and H4 were totally unaffected. 

Here's the CSS as it exists now:

I'm very new to this, so my first thought was the "src: url" was missing, and if I pasted the source URLs of the fonts back in, that might fix it. But when I did, nothing happened:

For reference, here's how my H1 looks:

And here's how it should look, using my H2 and H3's: 

So my questions are pretty straightforward:
1) How could duplicating a site change the original site's coding?
2) How can I fix this so my H1 goes back to displaying the correct font?

On 2/16/2022 at 4:59 AM, LAVATORR said:

Site URL: https://www.aboydandhisblog.com

This is a weird one. 

A couple days ago, I purchased some CSS code and, being a novice, made a duplicate site to experiment on so I wouldn't mess up my existing site. For some reason, the act of doing this changed my H1 font from League Spartan, which I use in all my headings, to...something else. H2, H3, and H4 were totally unaffected. 

Here's the CSS as it exists now:

I'm very new to this, so my first thought was the "src: url" was missing, and if I pasted the source URLs of the fonts back in, that might fix it. But when I did, nothing happened:

 

For reference, here's how my H1 looks:

And here's how it should look, using my H2 and H3's: 

So my questions are pretty straightforward:
1) How could duplicating a site change the original site's coding?
2) How can I fix this so my H1 goes back to displaying the correct font?

Do your old site and the link of custom font on it still exist?