index.community/frontend/src/index.css

html, body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background-color: #30404D;
  height: 100%;
  font-family: -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,Icons16,sans-serif;
}

.fediverse-welcome {
  margin-top: 50px;
}