Download extension "custom css and js loader"
Copy the following code to settings.json
"vscode_custom_css.imports": [
"file://D:\vscodeCustom\custom.css",
"file://D:\vscodeCustom\tab-bar.css",
"file://D:\vscodeCustom\transparent-ui.css",
"file://D:\vscodeCustom\cursor-rainbow.css"
],