font-thin    font-weight: 100;
font-extralight    font-weight: 200;
font-light    font-weight: 300;
font-normal    font-weight: 400;
font-medium    font-weight: 500;
font-semibold    font-weight: 600;
font-bold    font-weight: 700;
font-extrabold    font-weight: 800;
font-black    font-weight: 900;