Invisible links on hover

Hi,

I am using Hueman theme. My experience is incredible except the following which I can’t fix.

Site: https://www.virginwords.com
– post headings turns white on hover. My background is white so they become invisible. Same problem is with the post links appearing in sidebar.
– Links like categories on excerts are white in color. Visible only on hovering. Author on single post also have the same issue.

Please help me to make this theme perfect for me.
Rehards
Virginwords