:root {
    --title-font-family: 'Jost', sans-serif !important;
    --body-font-family: 'Fira Sans', sans-serif !important;
} 
h1, h2, h3, h4, h5, h6, .title {
    font-weight: 600 !Important;
} 
.block-layout.block-layout .sub-title {
    font-weight: 400 !Important;
}