@font-face {
    font-family: 'helvetica-regular';
    src: url('../fonts/roboto/Roboto-Regular.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}
@font-face {
    font-family: 'helvetica-bold';
    src: url('../fonts/roboto/Roboto-Bold.ttf') format('truetype');
    font-weight: bold;
    font-style: bold;
}
@font-face {
    font-family: 'helvetica-light';
    src: url('../fonts/roboto/Roboto-Regular.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}