How do I apply box shadow to adjacent elements without the appearance of overlapping?

Question

Given this html:

<div id="admin_login">
  <form>
    <input type="text"/>
    <input type="text"/>
  </form>
  <a href="#">Login</a>
</div>

And this css:

#admin_login form {
  background: #464950;
  padding: 5px;
  box-shadow: #000 2px 2px 10px;
  border-bottom-right-radius: 10px;
  margin-bottom:3px;
}

#admin_login input {
  display: block;
  border: none;
  margin: 6px 4px;
  padding: 4px;
}

#admin_login a {
  color: inherit;
  background: #464950;
  padding: 4px 8px;
  border-bottom-right-radius: 10px;
  border-bottom-left-radius: 10px;
  box-shadow: #000 2px 2px 10px;
  text-decoration: none;
}

I get this:

How can I make the anchor tag and the form appear as one element, instead of overlapping each other?

UPDATE

@TristarWebDesign's solution worked perfectly:

Answer 1

Try something like this -

HTML

<div id="admin_login">
  <form>
    <input type="text"/>
    <input type="text"/>
  </form>
  <div class="login-btn"><a href="#">Login</a></div>
</div>

CSS

#admin_login form {
  background: #464950;
  padding: 5px;
  box-shadow: #000 2px 2px 10px;
  border-bottom-right-radius: 10px;
  margin-bottom:3px;
}

#admin_login input {
  display: block;
  border: none;
  margin: 6px 4px;
  padding: 4px;
}

#admin_login a {
  color: inherit;
  background: #464950;
  padding: 4px 8px;
  border-bottom-right-radius: 10px;
  border-bottom-left-radius: 10px;
  box-shadow: #000 2px 2px 10px;
  text-decoration: none;
}
#admin_login .login-btn {
    height: 30px;
    margin: -3px 0 0 -4px;
    overflow: hidden;
    padding: 0 0 0 4px;
}

Basically just wrapping the link inside a div, setting the div to overflow hidden, and position it in the correct place.

You'll also need to make sure the link is on a layer above the form.