@media (max-width: 1080px) {
  .hero h1 {
    font-size: 56px;
  }

  .hero-copy {
    grid-column: 1 / span 5;
  }

  .hero-visual {
    grid-column: 6 / -1;
  }

  .trace-label {
    font-size: 11px;
  }

  .application-copy {
    grid-column: 2 / span 3;
  }

  .application-media {
    grid-column: 5 / -1;
  }
}

@media (max-width: 820px) {
  :root {
    --page-pad: 20px;
    --header-h: 64px;
    --grid-gap: 20px;
    --section-space: 72px;
  }

  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .brand-meta,
  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: inline-flex;
  }

  .mobile-nav {
    position: fixed;
    z-index: 45;
    inset: var(--header-h) 0 0;
    display: grid;
    align-content: start;
    gap: 0;
    padding: 24px var(--page-pad);
    background: var(--paper);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 180ms var(--ease), transform 180ms var(--ease), visibility 180ms;
  }

  .mobile-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .mobile-nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    border-bottom: 1px solid var(--line);
    font-size: 18px;
  }

  .mobile-nav svg {
    width: 18px;
    stroke-width: 1.75;
  }

  .hero {
    min-height: auto;
    padding: 28px 0 12px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
  }

  .hero-copy,
  .hero-visual,
  .transaction-trace {
    grid-column: 1;
  }

  .hero-copy {
    padding: 0;
  }

  .hero-kicker {
    margin-bottom: 18px;
  }

  .hero h1 {
    max-width: 560px;
    font-size: 40px;
    line-height: 1.14;
  }

  .hero-lead {
    margin-top: 20px;
    font-size: 16px;
    line-height: 1.7;
  }

  .hero-actions {
    margin-top: 24px;
    gap: 16px;
  }

  .visual-toolbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 12px;
  }

  .interface-tabs {
    width: 100%;
  }

  .interface-tab {
    flex: 1;
    padding-inline: 8px;
  }

  .transaction-trace {
    grid-template-columns: repeat(6, minmax(104px, 1fr));
    overflow-x: auto;
    scrollbar-width: none;
  }

  .transaction-trace::-webkit-scrollbar {
    display: none;
  }

  .trace-pulse {
    display: none;
  }

  .section {
    padding: var(--section-space) 0;
  }

  .applications {
    padding-top: 32px;
  }

  .section-heading,
  .architecture-intro {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 40px;
  }

  .section-heading h2,
  .section-heading p,
  .architecture-intro h2,
  .architecture-intro p {
    grid-column: 1;
  }

  .section-heading h2,
  .architecture-intro h2,
  .institutions-copy h2 {
    font-size: 32px;
    line-height: 1.22;
  }

  .section-heading p,
  .architecture-intro p {
    font-size: 16px;
    line-height: 1.65;
  }

  .application-row {
    grid-template-columns: 40px 1fr;
    gap: 16px;
    padding: 32px 0 48px;
  }

  .application-number {
    grid-column: 1;
  }

  .application-copy {
    grid-column: 2;
    padding: 0;
  }

  .application-copy h3 {
    font-size: 24px;
    line-height: 1.3;
  }

  .application-summary {
    margin-top: 20px;
    font-size: 16px;
  }

  .application-media {
    grid-column: 1 / -1;
    grid-template-columns: 1fr;
    margin-top: 16px;
    aspect-ratio: auto;
  }

  .scene-image {
    height: auto;
    aspect-ratio: 16 / 10;
  }

  .product-crop {
    aspect-ratio: 2 / 1;
  }

  .architecture-chain {
    grid-template-columns: 1fr;
  }

  .chain-block {
    min-height: auto;
    padding: 28px 20px 32px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .chain-block:last-child {
    border-bottom: 0;
  }

  .chain-meta {
    margin-bottom: 24px;
  }

  .chain-block h3 {
    font-size: 24px;
  }

  .chain-block > p {
    margin-top: 14px;
  }

  .chain-list {
    margin-top: 0;
    padding-top: 24px;
  }

  .chain-marker {
    display: none;
  }

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

  .capability-item,
  .capability-item:nth-child(even) {
    min-height: auto;
    padding: 24px 0 28px;
    border-right: 0;
  }

  .capability-item h3 {
    font-size: 24px;
  }

  .capability-item p {
    margin-top: 0;
    padding-top: 28px;
  }

  .institutions-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .institutions-copy,
  .responsibility {
    grid-column: 1;
  }

  .institutions-copy > p {
    margin-top: 24px;
    font-size: 16px;
  }

  .responsibility-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 20px 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-note,
  .footer-meta {
    justify-self: start;
  }

  .footer-note {
    white-space: normal;
  }

  .footer-meta {
    flex-wrap: wrap;
    gap: 8px 16px;
    white-space: normal;
  }

  .footer-meta > * + * {
    margin-left: 0;
    padding-left: 0;
    border-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}