test-card/src/index.css

body, html {
  height: 100%;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;

  color: white;
  background-color: black;

  font-family: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
  font-size: 1.5vw;
}

* {
  box-sizing: border-box;
}