I have been having trouble setting a box shadow on the left side of an element only.
I tried this:
.box {
box-shadow: -10px 0px 3px 0px #aaa;
}
<div class="box">Example element</div>
However, the box shadow looks more like a grey line and lacks the regular shadow-effect that I am used to when using box-shadow. Also, the above example includes a small top box-shadow that I am trying to get rid of.
You probably need more blur and a little less spread.
Try messing around with the box shadow generator here http://css3generator.com/ until you get your desired effect.