```scss
// Text color of buttons.
-$button-color: $white !default;
+$button-color: $white;
// Text color of buttons with a light background.
-$button-color-alt: $medium-gray !default;
+$button-color-alt: $medium-gray;
// Font weight of buttons.
-$button-font-weight: bold !default;
+$button-font-weight: bold;
// Background color of buttons.
-$button-background: $primary-color !default;
+$button-background: $primary-color;
// Border around buttons.
-$button-border: 2px solid $button-background !default;
+$button-border: 2px solid $button-background;
```
We put together some [Best Practices on Sass file structure](http://zurb.com/university/lessons/avoid-a-cluttered-mess-sensible-sass-file-structure) that will help you keep your project clean.