.container {
  margin-inline: auto;
  inline-size: min(100% - var(--space-m), 75ch);
}

nav {
  position: sticky;
  block-size: var(--space-xl);
  display: flex;
  align-items: center;
  inset-block-start: 0;
  background-color: var(--bg-primary);
  border-block-end: var(--border-primary);
}

nav > .container {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
}

header > .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
}

nav,
header,
main,
footer {
  padding-block: var(--space-s);
}

section {
  scroll-margin-block-start: var(--space-xl);
}

label[for="toggle-sidebar"] {
  display: inline-grid;
  place-content: center;
}

@media (min-width: 1525px) {
  #table-of-contents {
    position: fixed;
    inset-inline-start: calc(50% + 37.5ch + var(--space-m));
    inset-block-start: calc(var(--space-xl) + var(--space-s));
    max-inline-size: 35ch;
    padding: var(--space-s);
    background-color: var(--bg-primary);
    border: var(--border-primary);
  }

  #table-of-contents + section {
    margin-block-start: 0;
  }
}