.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 34px;
  width: var(--page);
  margin: 56px auto 0;
  padding: 34px 0 42px;
  border-top: 1px solid var(--ink-300);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand img {
  width: 30px;
}

.footer-brand strong,
.footer-brand span {
  display: block;
}

.footer-brand strong {
  font-family: var(--font-display);
}

.footer-brand span,
.footer-system {
  color: var(--ink-500);
  font-size: 10px;
}

.footer-claim {
  padding-left: 24px;
  border-left: 1px solid var(--ink-300);
  font-family: var(--font-display);
  font-size: 17px;
}

.footer-system {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

@media (max-width: 1040px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
  }

  .nav-links,
  .header-actions {
    display: none;
  }

  .menu-button {
    display: block;
    grid-column: 3;
  }

  .nav-links.is-open,
  .header-actions.is-open {
    position: absolute;
    right: 0;
    left: 0;
    display: grid;
    padding-inline: 24px;
    border-bottom: 1px solid var(--ink-200);
    background: var(--paper);
  }

  .nav-links.is-open {
    top: 77px;
    gap: 0;
  }

  .nav-links.is-open a {
    padding: 14px 0;
    border-bottom: 1px solid var(--ink-200);
  }

  .header-actions.is-open {
    top: 327px;
    padding-block: 14px;
  }

  .product-hero {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    width: min(100%, 620px);
  }

  .method-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .three-column,
  .model-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .release-list {
    grid-template-columns: 1fr;
  }

  .site-footer {
    grid-template-columns: 1fr auto;
  }

  .footer-system {
    display: none;
  }
}

@media (max-width: 760px) {
  :root {
    --page: min(100% - 28px, 1180px);
  }

  .site-header {
    min-height: 68px;
    padding-inline: 14px;
  }

  .nav-links.is-open {
    top: 67px;
  }

  .header-actions.is-open {
    top: 317px;
  }

  .brand-word {
    font-size: 21px;
  }

  .brand-mark {
    width: 30px;
  }

  .product-hero,
  .page-hero {
    padding-block: 52px;
  }

  h1 {
    font-size: clamp(43px, 14vw, 66px);
  }

  .hero-visual {
    min-height: 430px;
  }

  .sigil-stage {
    right: -10px;
    width: 205px;
  }

  .registry-instrument {
    padding: 22px;
  }

  .instrument-row {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .section {
    padding-block: 38px;
  }

  .section-header,
  .detail-grid,
  .three-column,
  .model-grid,
  .method-grid,
  .verify-panel,
  .paper-card {
    grid-template-columns: 1fr;
  }

  .section-header {
    gap: 15px;
  }

  .release-card {
    display: block;
  }

  .release-card > * {
    margin-bottom: 18px;
  }

  .detail-header {
    display: block;
  }

  .detail-status {
    justify-items: start;
  }

  .verification-result {
    grid-template-columns: 1fr;
  }

  .verification-seal {
    width: 68px;
    height: 68px;
  }

  .verify-input-row {
    display: grid;
  }

  .verify-input-row input {
    border-right: 1px solid var(--ink-300);
    border-bottom: 0;
  }

  .paper-action {
    align-items: flex-start;
  }

  .site-footer {
    display: block;
  }

  .footer-claim {
    margin-top: 24px;
    padding: 20px 0 0;
    border-top: 1px solid var(--ink-200);
    border-left: 0;
  }
}

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

  .sigil-trace,
  .state-pulse {
    animation: none;
  }

  .button {
    transition: none;
  }
}