@media (max-width: 1024px) {
  .nav-shell { grid-template-columns: 170px 1fr 170px; }
  .primary-nav { gap: 1.25rem; }
  .hero { min-height: 920px; }
  .signal-chip--one { left: 3rem; }
  .signal-chip--two { right: 3rem; }
  .section-heading--split { grid-template-columns: .65fr 1.4fr; }
  .section-heading--split > p:last-child { grid-column: 2; }
  .proof-strip__inner { grid-template-columns: 1.2fr repeat(3, 1fr); gap: 1rem; }
  .capability-row { grid-template-columns: .15fr 1fr .8fr; }
}

@media (max-width: 820px) {
  .container { width: min(calc(100% - 2rem), var(--container)); }
  .nav-shell { position: relative; display: flex; justify-content: space-between; }
  .nav-shell > .btn { display: none; }
  .nav-toggle { z-index: 2; display: grid; gap: 5px; width: 42px; height: 42px; place-content: center; }
  .nav-toggle span:not(.sr-only) { display: block; width: 22px; height: 2px; background: white; transition: transform var(--transition-base), opacity var(--transition-base); }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .primary-nav { position: absolute; top: 58px; right: 0; left: 0; display: none; flex-direction: column; gap: 0; border: 1px solid var(--color-border-dark); border-radius: 10px; padding: .6rem; background: #17383c; box-shadow: 0 20px 40px rgba(4,20,21,.25); }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { padding: .8rem 1rem; }
  .hero { min-height: 870px; }
  .hero__copy { padding-top: 128px; }
  .signal-chip { display: none; }
  .command-board { bottom: -100px; width: 88vw; grid-template-columns: 90px 1fr; min-height: 370px; }
  .metric-row > div { padding: .75rem; }
  .metric-row strong { font-size: 1rem; }
  .proof-strip__inner { grid-template-columns: repeat(3, 1fr); }
  .proof-strip p { grid-column: 1 / -1; text-align: center; }
  .section-heading--split { display: block; }
  .platform-panel { grid-template-columns: 1fr; }
  .panel-copy { padding-bottom: 1rem; }
  .ledger-visual, .scenario-visual, .answer-visual { min-height: 330px; }
  .capability-row { grid-template-columns: 45px 1fr; padding: 2.5rem 0; }
  .capability-row__number { padding-top: .3rem; }
  .capability-row > div:last-child { grid-column: 2; width: 100%; }
  .solutions__grid { grid-template-columns: 1fr; }
  .solutions__intro { position: static; }
  .trust-map { height: 650px; }
  .trust-node { width: 205px; }
  .technology__top { grid-template-columns: 1fr; gap: 1rem; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 2; }
}

@media (max-width: 600px) {
  .hero { min-height: 800px; }
  .hero__copy { padding-top: 115px; }
  .hero__lead { font-size: .98rem; }
  .hero__actions { flex-direction: column; gap: 1rem; }
  .signal-field { height: 430px; }
  .command-board { bottom: -70px; display: block; width: 94vw; min-height: 310px; border-width: 4px; }
  .command-board__rail { display: none; }
  .command-board__main { padding: .8rem; }
  .metric-row { gap: .35rem; }
  .metric-row > div { padding: .55rem; }
  .metric-row small { font-size: .55rem; }
  .metric-row strong { font-size: .88rem; }
  .chart-panel svg { height: 115px; }
  .proof-strip__inner { grid-template-columns: 1fr; text-align: center; }
  .proof-stat { border-top: 1px solid var(--color-border); border-left: 0; padding: 1.2rem 0 0; }
  .platform-tabs { grid-template-columns: 1fr; }
  .platform-tabs button { border-right: 0; border-bottom: 1px solid var(--color-border); padding: 1rem; }
  .platform-tabs button:last-child { border-bottom: 0; }
  .platform-panel { min-height: 0; }
  .panel-copy { padding: 2rem 1.4rem 1rem; }
  .ledger-visual, .scenario-visual, .answer-visual { min-height: 285px; margin: 1rem; padding: 1.2rem; }
  .ledger-row { gap: .6rem; padding: .75rem; font-size: .8rem; }
  .capability-row { grid-template-columns: 1fr; gap: 1rem; }
  .capability-row__number, .capability-row > div:last-child { grid-column: 1; }
  .stage-item { padding-block: 1.5rem; }
  .trust-map { display: grid; height: auto; grid-template-columns: 1fr; gap: 1rem; margin: 3rem 0; }
  .trust-map > svg { display: none; }
  .trust-map__core, .trust-node { position: static; width: 100%; transform: none; }
  .trust-map__core { height: auto; justify-content: flex-start; border-radius: 10px; padding: 1.25rem; }
  .technology__footer { flex-direction: column; }
  .closing-cta__inner > div { flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem 1.5rem; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-grid > div:last-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; gap: .5rem; }
}