/* Mobile Normalization v1
   Purpose: keep the desktop information hierarchy intact while normalizing tablet/phone spacing,
   CTAs, Samples, cards, and footer behavior across the five primary public pages.
   Breakpoints: compact/tablet <= 920px; phone <= 640px. */

@media (max-width: 920px) {
  .hero.section.section-major,
  .sample-hero,
  .article-hero {
    padding-top: 88px;
    padding-bottom: 54px;
  }

  .hero-grid,
  .split-layout,
  .engine-panel,
  .audience-layout,
  .principles-layout {
    gap: 42px;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .feature-card,
  .commercial-card-grid .feature-card {
    min-height: 0;
    padding: 26px;
  }

  .card-index,
  .commercial-card .card-index {
    margin-bottom: 28px;
  }

  .sample-hero {
    padding-inline: 0;
  }

  .sample-stack {
    gap: 40px;
    padding-bottom: 76px;
  }

  .sample-shell {
    padding: 26px;
  }

  .sample-label {
    align-items: flex-start;
  }

  .sample-actions,
  .hero-actions {
    align-items: stretch;
  }

  .sample-actions .button,
  .hero-actions .button {
    flex: 1 1 220px;
  }

  .doc-head,
  .doc-body {
    padding: 26px;
  }

  .mini-grid {
    grid-template-columns: 1fr;
  }

  .tail-row {
    grid-template-columns: minmax(120px, 150px) 1fr;
  }

  .footer-inner {
    min-height: 92px;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .hero.section.section-major,
  .sample-hero,
  .article-hero {
    padding-top: 66px;
    padding-bottom: 42px;
  }

  .section-major,
  .section-standard,
  .section-compact {
    padding-block: 56px;
  }

  .hero-lede,
  .sample-note,
  .article-deck,
  .prose,
  .section-heading > p:last-child {
    font-size: 1rem;
    line-height: 1.6;
  }

  .hero-actions,
  .sample-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    width: 100%;
  }

  .hero-actions .button,
  .sample-actions .button {
    width: 100%;
    min-height: 50px;
  }

  .feature-card,
  .commercial-card-grid .feature-card {
    padding: 22px;
  }

  .card-index,
  .commercial-card .card-index {
    margin-bottom: 20px;
  }

  .sample-stack {
    gap: 30px;
    padding-bottom: 60px;
  }

  .sample-shell {
    padding: 18px;
    border-radius: 9px;
  }

  .sample-label {
    display: grid;
    grid-template-columns: 1fr;
    gap: 5px;
    margin-bottom: 18px;
  }

  .sample-label span,
  .sample-label strong {
    overflow-wrap: anywhere;
  }

  .doc-head,
  .doc-body {
    padding: 18px;
  }

  .confidence {
    width: fit-content;
  }

  .mini-card,
  .tail-panel,
  .decision-callout {
    padding: 16px;
  }

  .tail-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .matrix-wrap,
  .article-table-wrap {
    margin-inline: -4px;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .proof-strip {
    grid-template-columns: 1fr;
  }

  .proof-links a,
  .proof-links span,
  .proof-strip span {
    padding: 14px 12px;
  }

  .proof-links a + span,
  .proof-links span + span,
  .proof-strip span + span {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .atlas-brand-statement,
  .atlas-context-line {
    align-items: flex-start;
  }

  .footer-inner {
    min-height: 0;
    padding: 30px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .footer-inner nav {
    flex-wrap: wrap;
    gap: 12px 20px;
  }
}