/* Page structure: sidebar + content column */
.page {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width));
  column-gap: var(--space-4);
  justify-content: center;
  min-height: 100vh;
  padding: 0 var(--space-3);
}

.sidebar {
  padding-top: 7rem;
}

.content {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-title {
  padding-top: var(--space-2);
  font-family: var(--font-ui);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

main {
  flex: 1;
  padding-top: 5rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0;
  font-family: var(--font-ui);
  font-size: var(--text-small);
  color: var(--color-muted);
}

/* Only the active section is shown (toggled by js/nav.js) */
.section {
  display: none;
}
.section.is-active {
  display: block;
}

/* Mobile: sidebar moves above the content */
@media (max-width: 800px) {
  .page {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 0;
  }

  .sidebar {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding-top: var(--space-3);
  }

  .site-title {
    font-size: 1.25rem;
  }
  main {
    padding-top: var(--space-3);
  }
}