css import font for bold and light

1@font-face {
2    font-family: "DejaVu Sans";
3    src: url("fonts/DejaVuSans.ttf");
4}
5@font-face {
6    font-family: "DejaVu Sans";
7    src: url("fonts/DejaVuSans-Bold.ttf");
8    font-weight: bold;
9}
10@font-face {
11    font-family: "DejaVu Sans";
12    src: url("fonts/DejaVuSans-Oblique.ttf");
13    font-style: italic, oblique;
14}
15@font-face {
16    font-family: "DejaVu Sans";
17    src: url("fonts/DejaVuSans-BoldOblique.ttf");
18    font-weight: bold;
19    font-style: italic, oblique;
20}