body {
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
}

.wrapper {
  display: grid;
  grid-template-areas:
    "header header"
    "nav content"
    "nav footer";
    grid-template-columns: 100px 1fr;
}

header {
  position: sticky;
  top: 0;
  background: hsla(0, 0%, 0%, 0.301);
  grid-area: header;
}

nav {
  grid-area: nav;
}

main {
  grid-area: content;
}

footer {
  grid-area: footer;
}

h1 {
  margin: 0;
}

.sidebar {
  container-type: inline-size;
}

.sidebar-content {
  background-color: antiquewhite;

  @container (min-width: 19rem) {
    background-color: azure;
  }
}