.pillar-page {
  padding-bottom: 4rem;
}

.pillar-shell {
  padding: clamp(1.5rem, 3vw, 2.4rem);
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
}

.pillar-header {
  display: grid;
  gap: 0.9rem;
}

.pillar-header h1 {
  color: var(--color-primary);
  font-size: clamp(2rem, 3.6vw, 3rem);
}

.pillar-header p {
  margin: 0;
  color: var(--color-on-surface-variant);
  line-height: 1.7;
}

/* Tabs */

.pillar-tabs {
  display: grid;
  gap: 1.25rem;
}

.pillar-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.pillar-tab {
  font: inherit;
  cursor: pointer;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-outline-soft);
  background: var(--color-surface-lowest);
  color: var(--color-on-surface-variant);
  font-weight: 600;
  font-size: 0.92rem;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.pillar-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pillar-tab:focus-visible {
  outline: 3px solid rgba(54, 96, 86, 0.28);
  outline-offset: 2px;
}

.pillar-tab.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-primary);
}

.pillar-tabpanels {
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  border: 1px solid var(--color-outline-soft);
  border-radius: var(--radius-lg);
  background: var(--color-surface-lowest);
}

.pillar-tabpanel {
  display: grid;
  gap: 1rem;
}

.pillar-tabpanel[hidden] {
  display: none;
}

.pillar-tabpanel h2 {
  margin: 0;
  color: var(--color-primary);
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
}

.pillar-tabpanel p {
  margin: 0;
  color: var(--color-on-surface-variant);
  line-height: 1.75;
}

.pillar-tabpanel a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 0.14em;
}

.pillar-links {
  font-size: 0.95rem;
}

/* Highlight section */

.pillar-highlight {
  display: grid;
  gap: 0.9rem;
  padding: clamp(1.75rem, 3vw, 2.5rem);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(54, 96, 86, 0.2);
  background:
    radial-gradient(circle at top right, rgba(54, 96, 86, 0.14), transparent 45%),
    #eaf3ef;
}

.pillar-highlight h2 {
  margin: 0;
  color: var(--color-primary);
  font-size: clamp(1.5rem, 2.4vw, 2rem);
}

.pillar-highlight p {
  margin: 0;
  color: var(--color-on-surface-variant);
  line-height: 1.7;
}

.pillar-highlight a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 0.14em;
}

@media (max-width: 640px) {
  .pillar-tablist {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.35rem;
    -webkit-overflow-scrolling: touch;
  }

  .pillar-tab {
    flex: 0 0 auto;
  }
}