@font-face {
  font-family: San-Francisco-Regular;
  src: url("San_Francisco/San_Francisco_Regular.ttf");
}
@font-face {
  font-family: San-Francisco-Bold;
  src: url("San_Francisco/San_Francisco_Bold.ttf");
}
@font-face {
  font-family: San-Francisco-Thin;
  src: url("San_Francisco/San_Francisco_Thin.ttf");
}
@font-face {
  font-family: San-Francisco-Ultralight;
  src: url("San_Francisco/San_Francisco_Ultralight.ttf");
}