Cant get border to extend HTML Outlook - html

Question

I am trying to create a certificate in an html email. I cannot get the border to extend to the right alignment. Below is my code and an image of it. I know that html in outlook doesnt behave the same way but I do want instructor and manager on the same line inside the border. Float doesnt work and I could not get the margins to work.
CSS Code
<pre>
<style>
.cert {
border: 15px solid #0072c6;
border-right: 15px solid #0894fb;
border-left: 15px solid #0894fb;
width: 700px;
font-family: arial;
color: #383737;
overflow: visible;
}
.crt_title {
margin-top: 30px;
font-family: "Satisfy", cursive;
font-size: 40px;
letter-spacing: 1px;
color: #0060a9;
}
.crt_logo img {
width: 130px;
height: auto;
margin: auto;
padding: 30px;
}
.colorGreen {
color: #27ae60;
}
.crt_user {
display: inline-block;
width: 20%;
padding: 5px 25px;
margin-bottom: 0px;
padding-bottom: 0px;
font-family: "Satisfy", cursive;
font-size: 40px;
border-bottom: 1px dashed #cecece;
}
.signature{
font-family: 'Brush Script MT', cursive;
font-size: 40px;
letter-spacing: 3px;
text-decoration: underline;
}
.normal{
font-family: 'Arial';
font-size: 40px;
letter-spacing: 3px;
}
.afterName {
font-weight: 100;
color: #383737;
}
.colorGrey {
color: grey;
}
.certSign {
width: 200px;
}
#media (max-width: 700px) {
.cert {
width: 100%;
}
.tableClass {
margin: 0px 0px 0px 0px !important;
padding: 0px 0px 20px 0px !important;
}
</style>
</pre>
HTML Code
<table al[![enter image description here][1]][1]ign="center" width="600" border="0" cellpadding="0" cellspacing="0" class="cert">
<tr>
<td width="70%" align="center" class="crt_logo">
<img src="logo path"width="200" height="121" alt="logo">
</td>
</tr>
<tr>
<td width="70%" align="center">
<h1 class="crt_title">Certificate Of Completion
<h2>This Certificate is awarded to</h2>
<h1 class="colorGreen crt_user">Name</h1>
<h3 class="afterName">For completion in Class
</h3>
<h3>Awarded on Date taken</h3></td>
</tr>
<tr>
<td align="left" valign ="middle" style="font-family: 'Brush Script MT', cursive;
font-size:30px; text-decoration: underline;display:inline:">Instructor </td>
<td width="10px" align="left" valign ="middle" style="font-family: 'Brush Script MT',
cursive; font-size:30px; text-decoration: underline;display:inline:">Manager</td>
</td>
</td>
</tr>
</table>