Module ID reference

[shimei]

Here's what worked for me. I added a dotted border as an example around only that particular widget:

div#widget_168.b-module.canvas-widget.search-widget {
border:dotted !important;
}

You can see in the below screen shot how I got the class.

[DemOnstar]

This is what I have so far. . .

div#widget_215 .widget-header {
    border-bottom: 2px solid #d8d5df;
    border-color: #d8d5df;
    margin-bottom: 214px;
    padding-bottom: 0;
    position: relative;
}
div#widget_215 .widget-header-divider {
    border-color: transparent;
}
div#widget_215 .widget-content{
   position:fixed;
   left: 20px;
   top:90px;
   z-index:100;
}

Finally achieved. . . but now I can't stop the image from spilling out of the box.

Thanks for the pointers all. .