.site-shell {
  display: grid;
  grid-template-columns: minmax(15rem, 16.5rem) minmax(0, 1fr) minmax(11rem, 13.5rem);
  gap: clamp(1.4rem, 2.2vw, 2.6rem);
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: clamp(1.25rem, 2vw, 2.4rem);
}

.site-header,
.site-main,
.site-sidebar {
  min-width: 0;
}

.site-header,
.site-sidebar {
  align-self: start;
  position: sticky;
  top: 1.35rem;
}

.site-header,
.site-sidebar,
.site-main {
  display: flex;
  flex-direction: column;
}

.site-header {
  gap: var(--space-4);
}

.site-sidebar {
  gap: var(--space-5);
}

.site-main {
  position: relative;
  gap: var(--space-7);
  max-width: var(--content-max-width);
  padding-top: 0.4rem;
}

.site-main::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-border);
}

.site-main > * {
  width: 100%;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-footer {
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

@media (max-width: 1120px) {
  .site-shell {
    grid-template-columns: minmax(0, 1fr) minmax(13rem, 15rem);
  }

  .site-header {
    position: static;
    grid-column: 1 / -1;
  }

  .site-main {
    max-width: none;
  }
}

@media (max-width: 760px) {
  .site-shell {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    padding: var(--space-3);
  }

  .site-header,
  .site-sidebar {
    position: static;
  }

  .site-main {
    gap: var(--space-6);
  }
}