/* Phase 4 trust and authority layer.
   Small additive helpers for the existing Vessel Core premium design system. */

.phase4-section-lead {
  max-width: 760px;
  margin: var(--space-4) 0 0;
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.75;
}

.phase4-section-link {
  margin-top: var(--space-8);
}

.procurement-flow-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--color-border);
  background: var(--color-border);
}

.procurement-step {
  min-height: 220px;
  padding: var(--space-6);
  background: var(--color-bg);
}

.procurement-step-number {
  display: block;
  margin-bottom: var(--space-8);
  color: var(--color-text-light);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.procurement-step h3 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-lg);
}

.procurement-step p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

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

.rfq-checklist-card {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.rfq-checklist-card h3 {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display);
}

.rfq-checklist-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.rfq-checklist-card li {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-muted);
}

.rfq-checklist-card li:last-child {
  border-bottom: 0;
}

.authority-note {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.authority-note p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.75;
}

@media (max-width: 980px) {
  .procurement-flow-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .procurement-flow-grid,
  .rfq-checklist-grid {
    grid-template-columns: 1fr;
  }

  .procurement-step {
    min-height: 0;
  }
}