sampardon
Hi
Add this code in custom.css file and change the padding value as per needs
.itemid-103 .t3-mainbody {
padding-top: 20px;
}
For the width of articles and height it depends on the content and it auto resize.
if you want to divide the content code, you need to use bootstrap classes in article content html code.
example
div class="col-md-6"> TEXT</div>
Total grid size is 12 , 6 is used to for 50%