CSS FONTS and font dimensions

Hi, 

how are you? Hope well!

I need some help with personalized fonts on my web.

I added in CSS fonts and they apply perfectly to the indicated h1,h2, h3, h4 and body.

The problem is this:

- i cannot find them in the Site Style part 

so, i am unable to edit the font dimension. it's simply adapted to the available space!

Thanks you so so so so much🥰

here there is my code in the CSS --> 

@font-face { 
font-family:  'new york';   
src: url(https://static1.squarespace.com/static/5f85a9e1c17e876031d78568/t/63a1ed3a0fe64442a0a9fbb6/1671556410591/NewYork.otf);}

@font-face {   
font-family:  'matrice medium';   
src: url(https://static1.squarespace.com/static/5f85a9e1c17e876031d78568/t/63a1ecfced57750431fbbd7a/1671556348606/Matrice-Medium.ttf);}

@font-face {   
font-family:  'helvetica neue hv';   
src: url(https://static1.squarespace.com/static/5f85a9e1c17e876031d78568/t/63a1ed041d1171749b642589/1671556356384/HelveticaNeueHv.ttf);}

@font-face {   
font-family:  'helvetica neue  LTStd';  
src: url(https://static1.squarespace.com/static/5f85a9e1c17e876031d78568/t/63a1ed500e114a5fbcb4d404/1671556432935/HelveticaNeueLTStd-BlkIt.otf);}

h1 {font-family: 'new york'!important;}
h2 {font-family: 'new york'!important;}
h3 {font-family: 'matrice medium'!important;}
h4 {font-family: 'matrice medium'!important;}

Hi,

What is your site url? We can check easier