CAPTCHA Placeholder text & input alignment

The site in question is http://dreadnaughtdigital.com/#contact

Here is a screenshot of how I’d like it to look
http://i.imgur.com/ty1Kmu6.jpg

Hey thanks for the reply. Unfortunately those options aren’t available for CAPTCHA, just the fields (which I’ve already done). Any other ideas?

Can you tell me what php file to edit?

This is the code I need to change

<div id="fscf_captcha_image_div1" style="width:300px; height:40px; padding-top:2px;">
<img id="fscf_captcha_image1" width="110" height="45" title="CAPTCHA Image" alt="CAPTCHA Image" src="http://dreadnaughtdigital.com/wordpress/wp-content/plugins/si-contact-form/captcha/securimage_show.php?ctf_sm_captcha=1&prefix=KBfMK2U5rAvZuI8I" style="border-style:none; margin:0; padding:0px; padding-right:5px; float:left;">
<input id="fscf_captcha_prefix1" type="hidden" value="KBfMK2U5rAvZuI8I" name="fscf_captcha_prefix1">

<div id="fscf_captcha_refresh1" style="float: left; padding-right: 5px">
<a onclick="fscf_captcha_refresh('1','/wordpress/wp-content/plugins/si-contact-form/captcha','http://dreadnaughtdigital.com/wordpress/wp-content/plugins/si-contact-form/captcha/securimage_show.php?ctf_sm_captcha=1&prefix='); return false;" title="Refresh Image" rel="nofollow" href="#">
</div>

<input id="fscf_captcha_code1" type="text" style="text-align:left; margin:0; width:110px; height: 15px" value="" name="captcha_code" placeholder="Enter CAPTCHA">
</div>

<div id="fscf_submit_div1" style="text-align:left; clear:both; padding-top:15px;">
<input id="fscf_submit1" type="submit" onclick="this.disabled=true; this.value='Submitting...'; this.form.submit();" value="Send" style="cursor:pointer; margin:0;">
</div>