html {
  overscroll-behavior: none;
}

body {
  --sidebar-width: 30%;

  display: grid;
  grid-template-areas:
    "header main";
  grid-template-columns: 220px 1fr;
  grid-template-rows: 1fr auto;
  max-height: 100vh;
  min-block-size: 100dvh;
}

@media (min-width: 100ch) {
  body:has(aside) {
    grid-template-areas:
      "header header"
      "main   aside"
      "footer footer";
    grid-template-columns: 1fr var(--sidebar-width);
  }
}

@media (max-width: 100ch) {
  aside {
    display: none;
  }
}

header {
  grid-area: header;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-text-reversed);
  border-bottom: solid 0,5 var(--lch-gray);
  padding: var(--block-space) var(--inline-space);
  & nav {
    display: flex;
    flex-direction: column;
    font-size: 0.9rem;
    gap: var(--inline-space-double);
    font-weight: 500;
  }
  & a {
    text-decoration: none;
  }
}

main {
  grid-area: main;
  overflow-y: auto;
  padding: var(--block-space) var(--inline-space);
  min-width: 80%;
  max-inline-size: 90ch;
  margin-inline: auto;
}

aside {
  grid-area: aside;
  overflow-y: auto;
  padding: var(--block-space-double) var(--inline-space-double);
}

.footer {
  grid-area: footer;
  display: flex;
  flex-direction: column;
  gap: var(--block-space-half);
  text-align: center;
  font-size: 0.9rem;
  background-color: var(--color-text-reversed);
  padding: var(--block-space-half) var(--inline-space-half);
  border-top: solid 0,5 var(--lch-gray);
  color: var(--color-link)
}