How do I change font size?

[Vedmant]

How do I change font size, changing font size of parent tag doesn't have an effect, I don't see any option to change font size. Changing font size of .vue-diff-viewer also doesn't work properly as line heights stay the same.

[ahmet-v]

You can try:

.vue-diff-viewer {
    pre {
        code {
            span {
                font-size: 13px;
            }
        }
    }
}