having trouble styling my contact us slider - css

Question

I have been trying to style my "contact us" slider window but for my lack of knowledge (started website designing only a month back for my own project) I am kinda stuck.
The functionality is working great, but there are a few issues:
"contact us" text and a image that I am trying to get in a line is
not working.
in collapse mode, div containing text "contact us" is getting
reduced width wise.
Please excuse my not-so-technical language, since I am new to the concept.. Please refer my website koncreteplanet.com.. also, I have created a jsfiddle to give a glimpse of the code I am using (https://jsfiddle.net/jjff2o2x/). Thanks in advance!!
Javascript code:
jQuery("#ContactUs_header").click(function () {
jQuery('#slideContactUsbox').slideToggle('slow');
});
HTML / PHP code:
<div class="row">
<div class="col-md-8">
</div>
<div class="col-md-4" id="contactus-panel">
<div class="contactus-panel">
<div id="ContactUs_header" class="contactus_footer" >
<p>Contact Us</p>
<img align="right" width=auto height="40px" src= "<?php echo bloginfo('template_directory') . "/image/handshake.png" ; ?>">
</div>
<div id="slideContactUsbox" class="contactus-extended">
<div class="container" style="width:300px;align:left;" id="MailUs-Panel">
<form name="Form-MailUs" id="Form-MailUs" method="post" action=<?php echo (get_template_directory_uri() . "/contactus/html_form_send.php"); ?> >
<div class="">
<input type="text" class="form-control mailflds" name="first_name" id="first_name" maxlength="50" size="30" placeholder="Name">
</div>
<br>
<div>
<input type="text" class="form-control mailflds" name="email" id="email" maxlength="80" size="30" placeholder="E-Mail">
</div>
<br>
<div>
<input type="text" class="form-control mailflds" name="telephone" id="telephone" maxlength="30" size="30" placeholder="Mobile / Landline Number">
</div>
<br>
<div>
<textarea name="comments" id="comments" class="form-control mailflds" maxlength="1000" cols="25" rows="6" placeholder="Enter your comments"></textarea>
</div>
<br>
<div>
<Button class="btn btn-primary btn-block btn-custom" id="Submit_MailUs" name="Submit_MailUs">Submit</Button>
</div>
<div id="ack-mailus-err" style="color:red;font-family:garamond;font-size:18px;text-align:center;">
</div>
</form>
</div>
<div id="ack-mailus" style="color:green;font-family:garamond;font-size:18px;text-align:center;">
</div>
</div>
</div> <!-- end of contactus panel -->
</div>
</div>
CSS code
.contactus-panel{
position:fixed;
bottom:0;
z-index:9999;
}
.contactus_footer{
position:relative;
/*z-index: 10; */
/*float:right; */
text-align: left;
line-height: 1.5;
cursor: pointer;
padding: 5px 2px 4px 15px;
font-family:'Raleway', garamond, sans-serif;
font-size:20px;
background-color: #084000;
-webkit-border-radius: 10px 10px 0 0;
-moz-border-radius: 10px 10px 0 0;
border-radius: 10px 10px 0 0;
position: relative;
width: 100%;
vertical-align:center;
float:left;
}
.contactus_footer a {
color: #fff;
}
.contactus-extended{
background-color:#fff;
padding-top:20px;
padding-bottom:20px;
}

Answer 1

slideToggle() is jQuery method. Please using jQuery.
https://jsfiddle.net/pgqnjdvp/

Answer 2

I was able to resolve both parts of the issue.. can't believe it was that simple.. for part 2: I just added width exclusively to the container and it ceased to exist... also resolved part 1 of the issue.. added float and vertical-align:middle to both the text and img element styling too in addition to the div class and got the desired result.