Button in form not in line

[drmnk]

Hello! First of all, thank you fro great css framework.

But I have a problem - when I try to do simple form with input and button, that should be in one line, button have a little margin. What can be a problem?

  <form method="POST" action="/settings/catalog/store">
    <div class="row">
      <div class="col-sm-9">
        <input style="width:100%;" type="text" name="catalog_name" placeholder="Name of the product">
      </div>
      <div class="col-sm-3">
        <input style="width: 100%;" type="submit" value="New product" class="primary">
      </div>
    </div>
  </form>