In order to use custom style for the usual theme place your own article-style.css
in /sdcard/GoldenDict/.config directory. Do the same with article-style-night.css for
customizing the night theme. See example below on this page.
Available starting with GoldenDict version 1.5.0.
How to add custom fonts?
Add custom font in your article-style.css or article-style-night.css in the usual way
using 'file://<absolute path to font>' url scheme.
Available starting with GoldenDict version 1.5.0.