Hello
For this issue you could try setting a min-height to your extension by adding something like the following to the Custom CSS field of your templates parameters...
.btp {
min-height: 400px;
}
To remove the underline from your article titles you can also add the following to the same field...
.item-title::before, .page-header::before, .item-title::after, .page-header::after {
display: none;
}
To edit this area you can add the following, editing to your own taste....
.item-title:after,
.page-header:after {
content: '';
height: 3px;
width: 200px;
position: absolute;
bottom: 0;
display: block;
border-top: 1px solid rgba(0, 0, 0, 0.2);
border-bottom: 1px solid rgba(0, 0, 0, 0.2);
}
.item-title:before,
.page-header:before {
content: '';
height: 5px;
width: 60px;
position: absolute;
bottom: 0;
display: block;
background-color: #CB6529;
}
Ciarán