[id^="single-spa-application"]:not([id*="shell"]) {
  display: grid;
  overflow: auto;
}
[id^="single-spa-application"]:not([id*="shell"]) > div {
  display: grid;
}
body {
  margin: 0px;
  height: 100vh;
  width: 100vw;
  background: #fff;
  display: grid;
  grid-template-rows: [header] auto [shell] auto [content] 1fr;
}