Collapsing Archives getting truncated

I’ve been messing around quite a bit today with my widgets, so I’m not exactly sure what I did, but my collapsing archives widget is getting cut off now. I’ve tried deleting and re-installing it with no luck. Here’s my website: https://www.meandmydiy.com. I’m not sure if it might have something to do with this code I put in:

<style>
ul {margin:0; padding:0}
ul li {overflow:hidden; list-style:none; float:none; clear:both; margin:0 0 5px 0; height:70px;}
</style>

My Popular Posts thumbnails were out of wack after a hack and that fixed it. Thanks in advance!