$font__family--sans: 'Roboto', sans-serif;
$font__family--sans--especial: 'Lato', Helvetica, sans-serif;
$font__family--serif: 'Roboto Slab',serif;
$font__family--serif--especial: 'Georgia', serif;
$font__family--monospace: 'Source Code Pro', monospace;
$font__family--system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;