How to set styles for html/body in vue cli?

Question

Vue.js

Hello, I want to apply

html {
  overflow: hidden;
  user-select: none;
}
body {
  margin: 0;
  overflow: hidden;
}
img {
  pointer-events: none;
}

but they are not applied to body and html respectively, but to the root vue-div, how can I fix this