.envelope-interiors-page {
  padding-top: 28px;
}

.envelope-interiors-hero {
  align-items: stretch;
  gap: 22px;
  padding: 30px;
}

.envelope-snapshot {
  flex: 0.92;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.snapshot-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.snapshot-label {
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.snapshot-value {
  font-size: 14px;
  line-height: 1.62;
  color: var(--color-ink);
  font-weight: 700;
}

.family-board {
  margin-top: 22px;
  padding: 24px;
}

.family-board-top {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.family-board-title {
  margin: 0;
  font-size: 22px;
  line-height: 1.24;
  color: var(--color-brand-900);
}

.family-board-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 82ch;
}

.family-board-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.family-module {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.family-module-title {
  margin: 0;
  font-size: 17px;
  line-height: 1.28;
}

.family-module-title a {
  color: var(--color-brand-900);
  text-decoration: none;
}

.family-module-title a:hover {
  text-decoration: underline;
}

.family-module-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.66;
  color: var(--color-muted);
}

.interface-zone {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
}

.interface-card,
.material-card {
  padding: 22px;
}

.interface-title,
.material-title {
  margin: 0 0 14px 0;
  font-size: 21px;
  line-height: 1.24;
  color: var(--color-brand-900);
}

.interface-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.interface-row {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  padding: 14px 15px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 14px;
  align-items: start;
}

.interface-name {
  font-size: 14px;
  font-weight: 900;
  line-height: 1.45;
  color: var(--color-brand-900);
}

.interface-desc {
  font-size: 14px;
  line-height: 1.66;
  color: var(--color-muted);
}

.material-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.material-pill {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--color-brand-200);
  color: var(--color-brand-900);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.35;
}

.envelope-interiors-shell {
  margin-top: 22px;
}

.envelope-interiors-article {
  padding: 30px;
}

.envelope-interiors-article-title {
  font-size: 31px;
}

.process-ribbon {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 20px;
  margin-bottom: 22px;
}

.process-item {
  border-radius: var(--radius-md);
  background: var(--color-brand-200);
  padding: 14px 15px;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
}

.process-step {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: #ffffff;
  color: var(--color-brand-900);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 900;
}

.process-copy {
  font-size: 13px;
  line-height: 1.58;
  color: var(--color-ink);
}

.envelope-interiors-sidebar {
  position: sticky;
  top: 24px;
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-links a {
  text-decoration: none;
  color: var(--color-brand-900);
  font-weight: 700;
}

.sidebar-links a:hover {
  text-decoration: underline;
}

.footer-nav-expanded {
  align-items: flex-start;
}

.footer-links {
  flex-wrap: wrap;
  row-gap: 10px;
}

.nav-link.is-current,
.mobile-nav-link.is-current {
  background: var(--color-brand-200);
  color: var(--color-brand-900);
}

.footer-link.is-current {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body {
  gap: 20px;
}

.article-section {
  gap: 8px;
}

.article-paragraph {
  line-height: 1.74;
}

@media (max-width: 1180px) {
  .family-board-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 980px) {
  .envelope-interiors-hero {
    flex-direction: column;
  }

  .interface-zone {
    grid-template-columns: 1fr;
  }

  .interface-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .process-ribbon {
    grid-template-columns: 1fr;
  }

  .envelope-interiors-sidebar {
    position: static;
  }
}

@media (max-width: 720px) {
  .envelope-interiors-page {
    padding-top: 24px;
  }

  .envelope-interiors-hero {
    padding: 22px;
    gap: 18px;
  }

  .family-board,
  .interface-card,
  .material-card,
  .envelope-interiors-article {
    padding: 18px;
  }

  .family-board-grid {
    grid-template-columns: 1fr;
  }

  .envelope-interiors-article-title {
    font-size: 27px;
  }

  .snapshot-card,
  .family-module,
  .interface-row,
  .process-item {
    padding: 14px;
  }
}