The Sass .sass file is visually different from .scss file, e.g.
Example.sass - sass is the older syntax
$color: red
=my-border($color)
border: 1px solid $color
body
background: $color
+my-border(green)
Example.scss - sassy css is the new syntax as of Sass 3
$color: red;
@mixin my-border($color) {
border: 1px solid $color;
}
body {
background: $color;
@include my-border(green);
}
Any valid CSS document can be converted to Sassy CSS (SCSS) simply by changing the extension from .css to .scss.