Refind GitHub: Custom CSS

style.css

code,
kbd,
pre,
tt,
.ace_editor.ace-github-light,
.blame-sha,
.blob-code-inner,
.blob-num,
.branch-name,
.commit .sha,
.commit .sha-block,
.commit-desc pre,
.commit-ref,
.commit-tease-sha,
.default-label .sha,
.export-phrase pre,
.file-editor-textarea,
.file-info,
.gollum-editor .expanded textarea,
.gollum-editor .gollum-editor-body,
.hook-delivery-guid,
.hook-delivery-response-status,
.input-monospace,
.news .alert .branch-link,
.oauth-app-info-container dl.keys dd,
.quick-pull-choice .new-branch-name-input input,
.rgh-monospace-textareas textarea,
.tag-references>li.commit,
.text-mono,
.two-factor-secret,
.upload-files .filename,
.url-field,
.wiki-wrapper .wiki-history .commit-meta code {
    font-family: 'GoMono Nerd Font', 'CaskaydiaCove Nerd Font', 'mononoki Nerd Font', 'JetBrainsMono Nerd Font', Menlo, Consolas, Courier, monospace !important;
}