link text is transparent? Seems my CSS is OK

Hiya!
When my links go through the link manager, the actual URL is transparent? It’s clickable but you cannot actually view it?
Any help is appreciated!
https://www.ecobumz.com/links-3/
I’ve checked my UL css? Could that be it?

ul,ol {
color:#000;
margin:10px 30px;
padding:0 15px;
}

ul span,ol span {
color:#666;
}