Positioning reCAPTCHA widget with CSS

To align reCAPTCHA with rest of the other form-fields you have to change your DOM structure something like this:

HTML:

<label for="captcha">
   <span>&nbsp;</span>
      <div id="recaptcha">
             ...

then also change/write the CSS:

#recaptcha {
   margin: 0px;
   width: 304px;
   position: relative;
   float: left;
}

#recaptcha iframe {
   position: absolute;
   left: 0px;
   top: 0px;
}

This will do the trick for you.

Just modify your existing CSS with this:

.contact-form label, #recaptcha {
    display: block;
    margin: 0px 0px 15px 0px;
}
.contact-form label > span, #recaptcha::before {
    width: 100px;
    text-align: right;
    float: left;
    padding-top: 8px;
    padding-right: 20px;
    content:""; //Make sure you add this as well
}
.contact-form .textarea-field, .g-recaptcha {
    width: 70%;
    height: 250px;
    font-size: 18px;
    display: inline-block;
}

Pseudo elements are used here so that you don't have to change your markup. :before works as a span inside the label thus providing uniformity in your html structure and hence solving the alignment issue