/* ——— laptop: 1024–1439 ——— */
@media (max-width: 1439px) {
  h1 { font-size: clamp(56px, 6vw, 84px); }
  .board-inner { grid-template-columns: 96px 1fr; }
}

/* ——— tablet: 768–1023 ——— */
@media (max-width: 1023px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 60ch; }
  .board { max-width: 640px; }

  .ledger-grid { grid-template-columns: 1fr; }
  .ledger-side { border-left: none; border-top: 1px dashed var(--color-border); padding-left: 0; padding-top: 32px; }

  .about-grid, .shots-grid, .aud-grid { grid-template-columns: 1fr; }
  .shot--featured { grid-row: auto; }
  .loop-grid { grid-template-columns: 1fr; }
  .stack-row { grid-template-columns: 1fr; }
  .case-cols { grid-template-columns: 1fr; }
  .case-col { border-right: none; border-bottom: 1px dashed var(--color-border); }
  .case-col:last-child { border-bottom: none; }
  .not-grid { grid-template-columns: 1fr; }
  .roi-cta, .faq-callout { flex-direction: column; align-items: flex-start; }
  .pp-grid { grid-template-columns: 1fr 1fr; }
  .pp-grid > div:nth-child(2) { border-right: none; }
  .pp-grid > div:nth-child(-n+2) { border-bottom: 1px dashed var(--color-border); }
  .tax-grid { grid-template-columns: 1fr 1fr; }
  .tax-card:nth-child(3) { grid-column: 1 / -1; max-width: 520px; }
  .tax-card { transform: none !important; }

  .how-grid { grid-template-columns: 1fr; }
  .how-index { position: static; }
  .how-index ol { display: none; }

  .pipes-grid { grid-template-columns: 1fr 1fr; }
  .pipes-grid::before { display: none; }
  .roi-stats { grid-template-columns: 1fr 1fr; row-gap: 34px; }
  .roi-calc { grid-template-columns: 1fr; }
  .roi-inputs { border-right: none; border-bottom: 1px dashed var(--color-border); }

  .origin-grid { grid-template-columns: 1fr; }
  .plans { grid-template-columns: 1fr; max-width: 560px; }
  .plan--featured { transform: none; }
  .partner-strip, .own-strip { grid-template-columns: 1fr; }
  .setup-grid { grid-template-columns: 1fr; }
  .req-grid { grid-template-columns: 1fr; }
  .order-flow { grid-template-columns: 1fr 1fr; }
  .req-card--handle { position: static; }
  .hero-grid .board { margin-top: 0; }

  .final-grid { grid-template-columns: 1fr; }
  .final-strip { max-width: 520px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  /* mobile nav */
  .menu-toggle { display: grid; place-items: center; }
  .site-nav {
    position: fixed; inset: 74px 0 auto 0; z-index: 99;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--color-ground);
    border-bottom: 1px solid var(--color-border);
    padding: 12px var(--pad-inline) 24px;
    display: none;
  }
  .site-nav.is-open { display: flex; }
  /* no-JS fallback: hamburger is useless, show the nav inline instead */
  html:not(.js) .menu-toggle { display: none; }
  html:not(.js) .site-nav {
    position: static; display: flex; flex-direction: row; flex-wrap: wrap;
    background: transparent; border: none; padding: 0; gap: 2px;
  }
  html:not(.js) .site-nav a.nav-link { border-bottom: none; font-size: 15px; padding: 8px 10px; }
  html:not(.js) .site-nav .button { margin: 0; }
  .site-nav a.nav-link { padding: 14px 8px; font-size: 17px; border-bottom: 1px solid var(--color-border); border-radius: 0; }
  .site-nav .button { margin: 18px 0 0; justify-content: center; }
}

/* ——— mobile: 320–767 ——— */
@media (max-width: 767px) {
  body { font-size: 16px; }
  h1 { font-size: clamp(54px, 13vw, 64px); }
  h2 { font-size: clamp(38px, 9vw, 52px); }
  h3 { font-size: 26px; }

  .hero { padding-top: 36px; }
  .hero-ctas .button { width: 100%; justify-content: center; }
  .hero-badges { flex-direction: column; align-items: flex-start; }
  .hero-numeric { flex-wrap: wrap; }

  .board { border-radius: var(--radius-medium); padding: 12px 10px 0; }
  .board-inner { grid-template-columns: 1fr; }
  .board-inner > *, .rail-step, .rp-row > * { min-width: 0; }
  .rp-row { flex-wrap: wrap; }
  .rp-meta { white-space: normal; }
  .rail-step .status { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .board-rail {
    flex-direction: row; border-radius: var(--radius-small) var(--radius-small) 0 0;
    padding: 10px; justify-content: space-between;
  }
  .rail-step { padding: 6px 4px; flex: 1; }
  .rail-step + .rail-step { border-top: none; border-left: 1px dashed color-mix(in srgb, var(--color-board-text) 25%, transparent); }
  .rail-step svg, .rail-step small { display: none; }
  .sheet { border-left: none; border-radius: 0; padding: 16px 14px 12px; }
  .sheet-title { font-size: 21px; }
  .checklist li { flex-wrap: wrap; row-gap: 6px; }
  .checklist .task { white-space: normal; flex-basis: calc(100% - 60px); }
  .checklist .chip { margin-left: 29px; }
  .sheet-cols { display: none; }
  .board-foot { flex-direction: column; gap: 4px; }

  .head-chip { display: none; }
  .ledger { min-width: 520px; font-size: 13px; }
  .ledger-wrap::after {
    content: "← scroll →"; display: block; text-align: center;
    font-family: var(--font-mono); font-size: 11px; color: var(--color-text-muted);
    padding-top: 8px; letter-spacing: 0.1em;
  }
  .tax-grid { grid-template-columns: 1fr; }
  .tax-card:nth-child(3) { grid-column: auto; max-width: none; }

  .pipes-grid { grid-template-columns: 1fr; }
  .roi-stats { grid-template-columns: 1fr 1fr; }
  .demo-form { grid-template-columns: 1fr; }
  .order-flow { grid-template-columns: 1fr; }
  .wiz-step { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
  .final-ctas .button { width: 100%; justify-content: center; }
  .step-panel { padding: 24px 18px 24px 60px; }
  .step-panel .n { left: 16px; top: 24px; }
  .step-list::before { left: 29px; }

  .sg { grid-template-columns: 1fr; gap: 8px; }
  .case-stamp { position: static; display: inline-block; margin: 6px 0 0; }
  .price-eq { font-size: 17px; }

  .lightbox { padding: 10px; }
  .lb-nav { width: 38px; height: 38px; }
  .lb-prev { left: 8px; }
  .lb-next { right: 8px; }
  .lb-foot { flex-direction: column; gap: 4px; }
  .lb-caption { font-size: 13px; }
}