comparison of a couple of common styles, how to use them together

bootstrap-integration.scss

// Baseline styles which should apply to all decent form markup

// Assume well-marked up forms
form input[type="submit"] {
 // ... submit button styles
}

// Twitter bootstrap style buttons
// uses the placeholer % to avoid a needless render of the button class
// ... we do want to put btn classes on things!
%btn {
 // ... many more twitter bootstrap styles
}

// now we can use TB stuff semantically
form input[type="submit"] {
  @extend %btn;
}