CSS font-weight not working on serbian latin letters

Question

My problem is that font-weight in css doesn't apply on serbian latin characters (šđčćž ŠĐČĆŽ) which the font supports. for example:

#header h1{
    font-family: 'Open Sans', sans-serif;
    font-weight: 800;
    color: #FFF;
    font-size: 50px;
    padding-left: 20px;
    padding-top: 20px;
    letter-spacing: 1px;
    text-shadow:1px 2px 3px black;}

shows all letters bolded except serbian latin characters ON SOME COMPUTERS. It works on mine (win8), but not on two of theirs (win8.1 and winXP). Same HTML, same CSS, all three of us using Chrome and connected to the Internet. Do you have any idea what could it be?

Answer 1

Have you done this? How to add multiple font files for the same font? none of the SVG fonts that I have seen have different font-weights and I've not yet run into directions for creating additional font weights in that font file type. Some font files appear to have font weights, so my guess is that the systems are choosing or ending up with a different font file type.