fira_code.css

@font-face{
    font-family: 'Fira Code';
    src: url('eot/FiraCode-Light.eot');
    src: url('eot/FiraCode-Light.eot') format('embedded-opentype'),
         url('woff2/FiraCode-Light.woff2') format('woff2'),
         url('woff/FiraCode-Light.woff') format('woff'),
         url('ttf/FiraCode-Light.ttf') format('truetype');
    font-weight: 300;
    font-style: normal;
}

@font-face{
    font-family: 'Fira Code';
    src: url('eot/FiraCode-Regular.eot');
    src: url('eot/FiraCode-Regular.eot') format('embedded-opentype'),
         url('woff2/FiraCode-Regular.woff2') format('woff2'),
         url('woff/FiraCode-Regular.woff') format('woff'),
         url('ttf/FiraCode-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
}

@font-face{
    font-family: 'Fira Code';
    src: url('eot/FiraCode-Medium.eot');
    src: url('eot/FiraCode-Medium.eot') format('embedded-opentype'),
         url('woff2/FiraCode-Medium.woff2') format('woff2'),
         url('woff/FiraCode-Medium.woff') format('woff'),
         url('ttf/FiraCode-Medium.ttf') format('truetype');
    font-weight: 500;
    font-style: normal;
}

@font-face{
    font-family: 'Fira Code';
    src: url('eot/FiraCode-Bold.eot');
    src: url('eot/FiraCode-Bold.eot') format('embedded-opentype'),
         url('woff2/FiraCode-Bold.woff2') format('woff2'),
         url('woff/FiraCode-Bold.woff') format('woff'),
         url('ttf/FiraCode-Bold.ttf') format('truetype');
    font-weight: 700;
    font-style: normal;
}

.remark-slide-number {
  font-size: 1pt;
  margin-bottom: -11.6px;
  margin-right: 10px;
  color: #FFFFFF; /* white */
  opacity: 1; /* default: 0.5 */
}