sample _button.scss partial. driven by other partials.

_buttons.scss

// sample use of @mixin button styles on buttons.
$button-border-radius: 3px; // make this a variable so you can use the same radius on multi-buttons and connected radio-buttons.

@mixin button {
  padding: 5px 10px;
  @include border-radius( $button-border-radius );
  @include box-shadow( inset 0 1px 3px 0 rgba($blackblue, .4) );
}
@mixin blue-button {
  @include button;
  @include blue-gradient;
  @include light-text;
}
@mixin green-button {
  @include button;
  @include green-gradient;
  @include light-text;
}