:root {
    --title-font-family: "Montserrat", sans-serif  !important;
    --title-weight: 400;
    --sub-title-font-family: "Arial", "Open Sans", sans-serif !important;
    --body-font-family: "Arial", "Open Sans", sans-serif !important;
} 

.block-layout .mrp-dynamic-form button.btn, 
.block-layout .button, 
.block-layout .mrp-dynamic-form button.btn label, 
.block-layout .button label {
	font-family: var(--title-font-family);
}