/* ==========================================================================
   social.css — Sustainability page styles (Wave 2)
   ========================================================================== */

/* ---------- Page head (shared pattern) ---------- */
.page-head {
  padding: 80px 0 48px;
  background: var(--color-bg-default);
}
.page-head__title {
  font-size: var(--text-h1);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
}
.page-head__sub {
  margin-top: 12px;
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
}
@media (max-width: 767px) {
  .page-head { padding: 48px 0 32px; }
}

/* ---------- Asymmetric pillar grid (D-10) ---------- */
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.pillar-card--lead {
  grid-column: span 2;
}
@media (max-width: 1023px) {
  .pillar-grid { grid-template-columns: repeat(2, 1fr); }
  .pillar-card--lead { grid-column: span 2; }
}
@media (max-width: 767px) {
  .pillar-grid { grid-template-columns: 1fr; gap: 16px; }
  .pillar-card--lead { grid-column: span 1; }
}

.pillar-card {
  background: var(--color-bg-default);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--dur-base) var(--ease-standard), box-shadow var(--dur-base) var(--ease-standard);
}
.pillar-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.pillar-card--lead {
  background: linear-gradient(135deg, var(--color-brand-red-soft) 0%, #FFFFFF 60%);
  border-color: var(--color-brand-red-soft);
}
@media (max-width: 767px) { .pillar-card { padding: 24px; } }

.pillar-card__icon {
  font-size: 40px;
  line-height: 1;
  margin-bottom: 16px;
}
.pillar-card--lead .pillar-card__icon { font-size: 56px; }

.pillar-card__title {
  font-size: var(--text-h3);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.3;
}
.pillar-card__en {
  margin-top: 4px;
  font-family: var(--font-sans-en);
  font-size: var(--text-body-sm);
  color: var(--color-text-tertiary);
  letter-spacing: 0.02em;
}
.pillar-card__desc {
  margin-top: 12px;
  font-size: var(--text-body);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ---------- CTA block ---------- */
.social-cta__box {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.social-cta__lead {
  font-size: var(--text-body-lg);
  color: var(--color-text-primary);
  margin-bottom: 24px;
}
.social-cta__btn {
  gap: 10px;
}
.social-cta__external {
  filter: brightness(0) invert(1);
}
.social-cta__hint {
  margin-top: 16px;
  font-size: var(--text-body-sm);
  color: var(--color-text-tertiary);
}