need help with custom CSS font

Im pretty sure I have SP 7.0 

I put in this code for custom font about 5 years ago and I need to change the font to 'pragmatica' - I just replaced where the old font name was with the new name but its not changing I'm not sure if I need to put in a whole new code? 

will past code below

//new font//
@font-face {
font-family: OLDSTANDARD;
src: url(https://static1.squarespace.com/static/5d6d1827cbc1df0001d27327/t/645dc089df5d601f1572f372/1683865739010/OldStandard-Bold.ttf);
}

//ASSIGN FONT HEADINGS//
h1 {font-family:PRAGMATICA;}
h2 {font-family:pragmatica;}
h3 {font-family:pragmatica;}

.Header-nav--primary
{font-family:PRAGMATICA;
font-weight:heavy;
  
}

.Body-text--
{font-family:OLDSTANDARD; }

.sqs-gallery-block-grid .slide .margin-wrapper .image-slide-title {
      font-size: 22px;
      font-weight: bold;
      font-family: OLDSTANDARD;
color: black;
      letter-spacing: 2px;
      left: 0;
      right: 0;
      margin-left: auto;
      margin-right: auto;
      padding: 10px;
      position: absolute;
      text-align: center;
      top: 50%;
      transform:          translateY(-50%);
  }
 
  
  /*Center Text*/
  .slide .margin-wrapper:hover .image-slide-title {
    display: inline-block;
  }
  .sqs-gallery-block-grid.sqs-gallery-block-meta-only-title .margin-wrapper .image-slide-title {
     white-space: normal !important;
     max-width: 70% !important;
     padding: 0 !important;
   }

.Header.Header--top {
  position: fixed;
  top: 0px;
  z-index:1000;
  width:100%;
  box-shadow: 0px 2px 3px rgba(0,0,0,0.1)
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 90px;
}
nav.header-menu-nav-list a {
    font-family: 'PRAGMATICA' !important;
}

15 minutes ago, GAGAS said:

I'm not sure if I need to put in a whole new code

It doesn't look like you have uploaded and replaced the old font file with the new one.

ok how do I do that? are you able to tell me the code to put in or where to change it? sorry I am so bad at this 

No worries!

You need to update this part of the code to change the src URL and the font name.

@font-face {
  font-family: OLDSTANDARD;
  src: url(https://static1.squarespace.com/static/5d6d1827cbc1df0001d27327/t/645dc089df5d601f1572f372/1683865739010/OldStandard-Bold.ttf);
}

You'll need to upload the new font file to "Manage Custom Files" in the Custom CSS dashboard. and then add the link in the line "src:url()"

You can have a look at this guide:

https://squarefortytwo.com/squarespace-guides/custom-fonts-on-squarespace-71

Make sure the font-family name is updated and then use it exactly as you have it here in the places where you are applying the font.