There are at least two answers to this question, a short one and a longer, more involved, more technical one. The short answer is "I don't know."
The longer answer involves talking a little bit about the technology that runs this website. If that makes your eyes glaze over, feel free to stop here and now as it's really not all that important in the grand scheme of things.
This website is running on a "content management system" that allows me to update the website from low powered devices like cell phones and tablets without needing a full-scale computer. Most of these content management systems separate content (the words written) from the presentation (how they look on your screen). This allows a consistent look through the pages and allows people to separate out the things they have skill from the things in which they are not so skilled.
The presentation in this case is called a "theme" and I can drastically change the look of the website simply by selecting another "theme". Katerina is the person who developed the particular theme that I'm using. She was kind enough to make that theme available for anyone to use and modify, which I have done. While I'm slowly customizing it to what I want and need, the bones are mostly her design and I thank her for the generosity in placing the theme out there for free.