.ppe-hero {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding: var(--space-7);
}

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

.ppe-intro-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.ppe-intro-card {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fbfcfb;
}

.ppe-principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

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

.ppe-principle-title {
  margin: 0 0 var(--space-2) 0;
  font-size: 17px;
  font-weight: 900;
  color: var(--color-brand-900);
}

.ppe-principle-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.ppe-category-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-4);
}

.ppe-category-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #ffffff;
  text-decoration: none;
}

.ppe-category-card:hover {
  border-color: var(--color-brand-900);
  transform: translateY(-1px);
}

.span-4 {
  grid-column: span 4;
}

.span-6 {
  grid-column: span 6;
}

.ppe-section {
  padding: var(--space-7);
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.section-heading {
  margin: 0;
  font-family: Fraunces, Georgia, serif;
  font-size: 30px;
  line-height: 1.18;
  color: var(--color-brand-900);
}

.section-paragraph {
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.8;
}

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

.info-box {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fbfcfb;
}

.info-title {
  margin: 0 0 var(--space-3) 0;
  font-size: 18px;
  font-weight: 900;
  color: var(--color-brand-900);
}

.dense-list {
  margin: 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  color: var(--color-muted);
  line-height: 1.7;
  font-size: 14px;
}

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

.feature-box {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
}

.feature-title {
  margin: 0 0 var(--space-2) 0;
  font-size: 18px;
  font-weight: 900;
  color: var(--color-brand-900);
}

.feature-text {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
}

.topic-text {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.7;
  font-size: 14px;
}

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

.mobile-nav-link.is-active {
  background: var(--color-brand-200);
  border-color: var(--color-brand-200);
  color: var(--color-brand-900);
}

@media (max-width: 1100px) {
  .ppe-category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .span-4,
  .span-6 {
    grid-column: span 1;
  }
}

@media (max-width: 980px) {
  .ppe-intro-grid,
  .ppe-principles,
  .two-up-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .ppe-hero,
  .ppe-section {
    padding: var(--space-6);
  }

  .section-heading {
    font-size: 26px;
  }

  .ppe-intro-card,
  .feature-box,
  .info-box {
    padding: var(--space-4);
  }

  .ppe-category-grid {
    grid-template-columns: 1fr;
  }
}