/* Shared page shell and responsive layout. */

.site-container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 20px;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--gap-width);
  align-items: start;
}

.main-content {
  grid-column: 1;
  min-width: 0;
}

.sidebar {
  grid-column: 2;
  position: sticky;
  top: 40px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  padding-right: 4px;
}

@media (min-width: 1300px) {
  .site-container {
    max-width: none;
    grid-template-columns: 1fr var(--content-width) 1fr;
    gap: 0;
  }

  .main-content {
    grid-column: 2;
  }

  .sidebar {
    grid-column: 3;
    width: var(--sidebar-width);
    margin-left: var(--gap-width);
    justify-self: start;
  }
}

@media (max-width: 900px) {
  .site-container {
    display: block;
    padding: 20px 15px;
  }

  .main-content {
    margin-bottom: 60px;
  }

  .sidebar {
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
    padding-right: 0;
    margin-left: 0;
    width: 100%;
    max-height: none;
    overflow-y: visible;
    position: static;
  }
}