How do I place the legend outside the fieldset border

Question

I am going crazy trying to figure out how to make this work. I would like the legend to be outside of the border. How can I make this happen while keeping the legend tag? As you can see below I tried using span but it is not working.

body {
  background-color: #996600;
  color: black;
}

fieldset {
  border: 10px solid #ffffff;
  border-radius: 10px;
  background-color: #999900;
  box-shadow: 10px 10px 5px #888888;
  position: relative;
}

legend {
  font-size: 20px;
  float: left;
}

legend span {
  top: 0px;
  left: 0px;
  position: absolute;
}


input[type=text] {
  border: 2px solid black;
  border-radius: 10px;
  background-color: #cccc80; 
}

input[type=button] {
  background-color: #996600; 
  border: 2px solid black;
  border-radius: 5px;
  color: #c9ae78;
  font-weight: bolder;
}

p {
  font-size: 12px;
  font-style: italic;
}

<form method="post" id="contactForm" action="#">
  <fieldset>
    <legend><span>Newsletter Signup</span>
    </legend>
    <p>To sign up for our fabulous campaign of useless information that you will never, ever read, please submit your email address here.</p>
    <label for="email" id="emailLabel">Email</label>
    <input type="text" id="email" />
    <input type="button" name="submit" value="Submit" id="submitButton" />
  </fieldset>
</form>

Answer 1

Use position: absolute for your legend, and add a margin-top on your fiedset to compensate this shift:

body {
    background-color: #996600;
    color: black;
}
fieldset {
    border: 10px solid #ffffff;
    border-radius: 10px;
    background-color: #999900;
    box-shadow: 10px 10px 5px #888888;
    position: relative;
    margin-top: 35px;
}
fieldset legend {
    position: absolute;
    top: -35px;
    left: 10px;
    font-size: 20px;
}
input[type=text] {
    border: 2px solid black;
    border-radius: 10px;
    background-color: #cccc80; 
}
input[type=button] {
    background-color: #996600; 
    border: 2px solid black;
    border-radius: 5px;
    color: #c9ae78;
    font-weight: bolder;
}
p {
    font-size: 12px;
    font-style: italic;
}

<form method="post" id="contactForm" action="#">
    <fieldset>
        <legend>Newsletter Signup</legend>
        <p>To sign up for our fabulous campaign of useless information that you will never, ever read, please submit your email address here.</p>
        <label for="email" id="emailLabel">Email</label>
        <input type="text" id="email" />
        <input type="button" name="submit" value="Submit" id="submitButton" />
    </fieldset>
</form>

Answer 2

Add the following to your legend:

legend {
    position: absolute;
    top: -1em;
    width: 100%;
}

Hope this helps