=font-face($family, $path, $weight: normal, $style: normal)
  @font-face
    font-family: $family
    src: url('./#{$path}.ttf') format('truetype')
    font-weight: $weight
    font-style: $style

+font-face('Open Sans', 'assets/fonts/OpenSans-Light', 300, 'light')
+font-face('Open Sans', 'assets/fonts/OpenSans-Regular', 400, 'regular')
+font-face('Open Sans', 'assets/fonts/OpenSans-Semibold', 600, 'semibold')
+font-face('Open Sans', 'assets/fonts/OpenSans-Bold', 700, 'bold')
+font-face('Open Sans', 'assets/fonts/OpenSans-ExtraBold', 800, 'extrabold')

$open-sans: 'Open Sans', sans-serif