.nav-link-current {
  color: var(--color-brand-900);
  background: var(--color-brand-200);
}

.plumbing-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(250px, 340px);
  gap: var(--space-5);
  padding: var(--space-6);
  margin-bottom: var(--space-5);
}

.plumbing-hero-main,
.plumbing-hero-side {
  min-width: 0;
}

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

.hero-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  padding: var(--space-4);
}

.hero-panel-label {
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.hero-panel-text {
  margin: 0;
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.5;
}

.plumbing-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.62fr) minmax(250px, 320px);
  gap: var(--space-5);
  align-items: start;
}

.plumbing-article {
  padding: var(--space-6);
}

.topic-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--space-4);
}

.plumbing-article .card-title {
  margin-top: 0;
  margin-bottom: var(--space-3);
}

.plumbing-article .article-paragraph + .article-paragraph {
  margin-top: var(--space-3);
}

.plumbing-article .article-paragraph + .card-title {
  margin-top: var(--space-5);
}

.systems-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.systems-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-brand-200);
  padding: var(--space-4);
}

.systems-title {
  margin: 0 0 8px 0;
  font-size: 15px;
  font-weight: 900;
  color: var(--color-brand-900);
}

.systems-text {
  margin: 0;
  color: var(--color-ink);
  font-size: 14px;
  line-height: 1.6;
}

.plumbing-sidebar {
  padding: var(--space-5);
  position: sticky;
  top: 20px;
}

.link-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: var(--space-2);
}

.text-link {
  color: var(--color-brand-900);
  font-weight: 700;
  text-decoration: none;
  line-height: 1.5;
}

.text-link:hover {
  text-decoration: underline;
}

.plumbing-bottom-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
  padding-top: var(--space-5);
}

.bottom-card {
  padding: var(--space-5);
}

.tight-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
  color: var(--color-muted);
  line-height: 1.6;
}

@media (max-width: 1100px) {
  .plumbing-hero,
  .plumbing-layout {
    grid-template-columns: 1fr;
  }

  .plumbing-sidebar {
    position: static;
  }
}

@media (max-width: 820px) {
  .systems-grid,
  .plumbing-bottom-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .plumbing-hero,
  .plumbing-article,
  .bottom-card {
    padding: var(--space-5);
  }
}