.f12 {
    
        font-size: 12px;
        line-height: 16px;

    }

.f14 {
    
        font-size: 14px;
        line-height: 18px;

    }

.f18 {
    
        font-size: 18px;
        line-height: 24px;

    }
.f20 {
    
        font-size: 20px;
        line-height: 24px;
        letter-spacing: 1px;
    }