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HTML

              
                <p>Here is some text that should show up by default in Plex Sans. Here is another sentence with <strong>some text in a strong tag</strong> and some <em>other text that should be italicized</em> and even some that should be <strong><em>bold and italic</em></strong>. Whew!</p>
<p class="serif">Here is the same text, but in Plex Serif and all we did was change the font-family. Here is another sentence with <strong>some text in a strong tag</strong> and some <em>other text that should be italicized</em> and even some that should be <strong><em>bold and italic</em></strong>. Whew!</p>
<h1>A nice headline in a very thin weight</h1>
<p class="sans-alt">Here is the same text, but in Plex Sans and shifted to lighter weights, and again all we did was change the font-family. Here is another sentence with <strong>some text in a strong tag</strong> and some <em>other text that should be italicized</em> and even some that should be <strong><em>bold and italic</em></strong>. Whew!</p>
              
            
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CSS

              
                @font-face {
    font-family: 'Plex Sans';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Regular.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Regular.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Regular.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Regular.woff') format('woff');
    font-weight: normal;
    font-style: normal;
}
@font-face {
    font-family: 'Plex Sans';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Bold.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Bold.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Bold.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Bold.woff') format('woff');
    font-weight: bold;
    font-style: normal;
}
@font-face {
    font-family: 'Plex Sans';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Italic.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Italic.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Italic.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Italic.woff') format('woff');
    font-weight: normal;
    font-style: italic;
}
@font-face {
    font-family: 'Plex Sans';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-BoldItalic.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-BoldItalic.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-BoldItalic.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-BoldItalic.woff') format('woff');
    font-weight: bold;
    font-style: italic;
}

@font-face {
    font-family: 'Plex Sans';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Thin.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Thin.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Thin.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Thin.woff') format('woff');
    font-weight: 100;
    font-style: normal;
}

@font-face {
    font-family: 'Plex Serif';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Regular.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Regular.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Regular.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Regular.woff') format('woff');
    font-weight: normal;
    font-style: normal;
}
@font-face {
    font-family: 'Plex Serif';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Bold.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Bold.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Bold.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Bold.woff') format('woff');
    font-weight: bold;
    font-style: normal;
}
@font-face {
    font-family: 'Plex Serif';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Italic.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Italic.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Italic.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-Italic.woff') format('woff');
    font-weight: normal;
    font-style: italic;
}
@font-face {
    font-family: 'Plex Serif';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-BoldItalic.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-BoldItalic.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-BoldItalic.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSerif-BoldItalic.woff') format('woff');
    font-weight: bold;
    font-style: italic;
}

/* Here we create a different font family and shift which fonts we want to have referenced by default for normal, bold, and italic */
@font-face {
    font-family: 'Plex Sans Alt';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Thin.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Thin.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Thin.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-Thin.woff') format('woff');
    font-weight: normal;
    font-style: normal;
}
@font-face {
    font-family: 'Plex Sans Alt';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-SemiBold.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-SemiBold.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-SemiBold.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-SemiBold.woff') format('woff');
    font-weight: bold;
    font-style: normal;
}
@font-face {
    font-family: 'Plex Sans Alt';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-ThinItalic.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-ThinItalic.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-ThinItalic.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-ThinItalic.woff') format('woff');
    font-weight: normal;
    font-style: italic;
}
@font-face {
    font-family: 'Plex Sans Alt';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-SemiBoldItalic.eot');
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-SemiBoldItalic.eot?#iefix') format('embedded-opentype'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-SemiBoldItalic.woff2') format('woff2'),
         url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSans-SemiBoldItalic.woff') format('woff');
    font-weight: bold;
    font-style: italic;
}

body {
  padding: 2rem 0;
}

p {
  font-family: "Plex Sans", Helvetica, Arial, sans-serif;
  font-size: 1.25rem;
  margin: 0 auto;
  max-width: 42rem;
}

p + p {
  margin-top: 2em;
}

strong {
  /* this stops browsers from trying to create a 'fake' bold weight */
  font-synthesis: none;
}

em {
  /* this stops browsers from trying to create a 'fake' italic style */
  font-synthesis: none;
}

.serif {
  font-family: "Plex Serif", Georgia, 'Times New Roman', serif;
}

h1 {
  font-family: "Plex Sans", Helvetica, Arial, sans-serif;
  font-size: 4em;
  font-weight: 100;
  font-synthesis: none;
  line-height: 1.05;
  margin: 2rem auto;
  max-width: 42rem;
}

.sans-alt {
  font-family: "Plex Sans Alt", Helvetica, Arial, sans-serif;
}

              
            
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