[DNSB]

You should not change the @font-face declarations. Only in the body of the CSS. If the font is being used as the body font, I just place it in the body declaration.

@font-face {
    font-family: 'Charis SIL';
    font-weight: normal;
    font-style: normal;
    src: url('../Fonts/CharisSILR.ttf');
}

@font-face {
    font-family: 'Charis SIL';
    font-weight: normal;
    font-style: italic;
    src: url('../Fonts/CharisSILI.ttf');
}

@font-face {
    font-family: 'Charis SIL';
    font-weight: bold;
    font-style: normal;
    src: url('../Fonts/CharisSILB.ttf');
}

@font-face {
    font-family: 'Charis SIL';
    font-weight: bold;
    font-style: italic;
    src: url('../Fonts/CharisSILBI.ttf');
}

body {
  display: block;
  font-family: "Charis SIL", serif;
  font-size: 1em;
  margin: 0 0 0 0;
  padding: 0 0 0 0;
  text-indent: 0;
  widows: 1;
  orphans: 1;
}