.architecture-hero {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface);
}

.architecture-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
}

.architecture-hero h1 span {
  display: block;
  margin-top: 0.45rem;
  color: var(--color-primary);
  font-size: clamp(1.05rem, 2vw, 1.4rem);
  font-weight: 650;
}

.architecture-hero__aside {
  padding: 1.25rem;
  border: 1px solid var(--color-line);
  border-top: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  background: var(--color-surface-soft);
}

.architecture-hero__aside p:last-child {
  margin-bottom: 0;
}

.architecture-section {
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.architecture-section + .architecture-section {
  border-top: 1px solid var(--color-line);
}

.architecture-section--white {
  background: var(--color-surface);
}

.architecture-section__heading {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1.2fr);
  gap: 1.5rem;
  align-items: end;
  margin-bottom: 1.5rem;
}

.architecture-section__heading p:last-child {
  margin-bottom: 0;
}

.topic-grid,
.system-grid,
.content-type-grid,
.hub-content-grid,
.search-results {
  display: grid;
  gap: 1rem;
}

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

.system-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.content-type-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.topic-card,
.system-card,
.content-type-card,
.hub-item,
.search-result {
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.topic-card,
.system-card,
.hub-item,
.search-result {
  padding: 1.2rem;
}

.topic-card,
.system-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
}

.topic-card h3,
.system-card h3,
.hub-item h3,
.search-result h3 {
  margin-bottom: 0.35rem;
  overflow-wrap: anywhere;
}

.topic-card .button,
.system-card .button {
  align-self: flex-start;
  margin-top: auto;
}

.topic-card__meta,
.system-card__meta,
.search-result__meta {
  color: var(--color-ink-soft);
  font-size: 0.86rem;
}

.topic-card__question {
  padding-left: 0.85rem;
  border-left: 3px solid var(--color-primary);
  color: var(--color-primary-dark);
  font-weight: 680;
}

.content-type-card {
  position: relative;
  padding: 1rem 0.85rem;
}

.content-type-card__index {
  display: block;
  margin-bottom: 0.65rem;
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.content-type-card h3 {
  font-size: 1rem;
}

.content-type-card p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 0.86rem;
}

.hub-layout {
  display: grid;
  grid-template-columns: minmax(190px, 0.24fr) minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.hub-nav {
  position: sticky;
  top: 1rem;
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.hub-nav a {
  padding: 0.55rem 0.65rem;
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: 0.88rem;
  font-weight: 680;
  text-decoration: none;
}

.hub-nav a:hover,
.hub-nav a:focus-visible {
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

.hub-section {
  scroll-margin-top: 1rem;
  padding: 1.35rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.hub-section + .hub-section {
  margin-top: 1rem;
}

.hub-depth {
  scroll-margin-top: 1rem;
  margin-bottom: 1rem;
  padding: clamp(1.2rem, 3vw, 1.7rem);
  border: 1px solid var(--color-line-strong);
  border-top: 5px solid var(--color-primary);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.hub-depth__header,
.hub-depth__group-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
}

.hub-depth__header p:last-child,
.hub-depth__block header p:last-child {
  margin-bottom: 0;
}

.hub-depth__metrics {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 1.2rem 0 0;
}

.hub-depth__metrics div {
  padding: 0.8rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface-soft);
}

.hub-depth__metrics dt {
  color: var(--color-primary-dark);
  font-size: 1.35rem;
  font-weight: 800;
}

.hub-depth__metrics dd {
  margin: 0.25rem 0 0;
  color: var(--color-ink-soft);
  font-size: 0.78rem;
  line-height: 1.35;
}

.hub-depth__block {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-line);
}

.hub-depth__groups,
.hub-depth__species,
.hub-depth__evidence {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 0.8rem;
}

.hub-depth__species {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.hub-depth__evidence {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hub-depth__groups article,
.hub-depth__species article,
.hub-depth__evidence article {
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface-soft);
}

.hub-depth__group-heading span {
  display: block;
  margin-top: 0.15rem;
  color: var(--color-ink-soft);
  font-size: 0.78rem;
}

.hub-depth__group-heading a {
  color: var(--color-primary-dark);
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}

.hub-depth__groups ul,
.hub-depth__evidence ul {
  display: grid;
  gap: 0.7rem;
  margin: 0.85rem 0 0;
  padding: 0;
  list-style: none;
}

.hub-depth__groups li,
.hub-depth__evidence li {
  padding-top: 0.7rem;
  border-top: 1px solid var(--color-line);
}

.hub-depth__groups li:first-child,
.hub-depth__evidence li:first-child {
  padding-top: 0;
  border-top: 0;
}

.hub-depth__groups li > span,
.hub-depth__evidence li > span {
  display: block;
  color: var(--color-ink-soft);
  font-size: 0.76rem;
}

.hub-depth__groups li p,
.hub-depth__evidence li p,
.hub-depth__species p {
  margin: 0.35rem 0 0;
  font-size: 0.84rem;
}

.hub-depth__boundary {
  color: var(--color-ink-soft);
}

.hub-section__heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.hub-section__heading p {
  margin-bottom: 0;
}

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

.hub-item {
  background: var(--color-surface-soft);
}

.hub-item p:last-child,
.search-result p:last-child {
  margin-bottom: 0;
}

.hub-empty {
  padding: 1rem;
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  background: var(--color-surface-soft);
}

.hub-image-panel {
  margin-top: 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--color-line);
}

.hub-image-panel__heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.hub-image-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.hub-image-card {
  display: grid;
  grid-template-rows: 150px auto;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-ink);
  text-align: left;
}

.hub-image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #e8edef;
}

.hub-image-card span {
  display: grid;
  gap: 0.25rem;
  padding: 0.7rem;
}

.hub-image-card small {
  color: var(--color-ink-soft);
}

.hub-image-dialog {
  width: min(1160px, calc(100% - 2rem));
  max-height: calc(100vh - 2rem);
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
}

.hub-image-dialog::backdrop {
  background: rgba(15, 31, 38, 0.68);
}

.hub-image-dialog__toolbar {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--color-line);
}

.hub-image-dialog__body {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  max-height: calc(100vh - 7rem);
  overflow: auto;
}

.hub-image-dialog__stage {
  display: grid;
  min-height: 420px;
  place-items: center;
  padding: 1rem;
  background: #17262d;
}

.hub-image-dialog__stage img {
  max-height: calc(100vh - 10rem);
  object-fit: contain;
}

.hub-image-dialog__body aside {
  padding: 1.2rem;
  overflow-wrap: anywhere;
}

.organ-filter {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.organ-filter a {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-primary-dark);
  background: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

.organ-filter a[aria-current="true"] {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.search-panel {
  padding: 1.2rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.search-controls {
  display: grid;
  grid-template-columns: minmax(220px, 2fr) repeat(5, minmax(120px, 1fr));
  gap: 0.75rem;
}

.search-controls label {
  display: grid;
  gap: 0.35rem;
  color: var(--color-ink-soft);
  font-size: 0.78rem;
  font-weight: 720;
}

.search-controls input,
.search-controls select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-ink);
  padding: 0.55rem 0.65rem;
}

.search-results {
  margin-top: 1rem;
}

.search-result {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: start;
}

.search-result__action {
  white-space: nowrap;
}

.architecture-error {
  padding: 1rem;
  border: 1px solid #d7b49c;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: #6f3526;
}

@media (max-width: 1020px) {
  .content-type-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .search-controls label:first-child {
    grid-column: 1 / -1;
  }

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

  .hub-depth__metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 760px) {
  .architecture-hero__inner,
  .architecture-section__heading,
  .hub-layout {
    grid-template-columns: 1fr;
  }

  .topic-grid,
  .hub-content-grid,
  .hub-depth__groups,
  .hub-depth__evidence {
    grid-template-columns: 1fr;
  }

  .hub-image-dialog__body {
    grid-template-columns: 1fr;
  }

  .hub-image-dialog__stage {
    min-height: 280px;
  }

  .hub-nav {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .system-grid,
  .content-type-grid,
  .search-controls {
    grid-template-columns: 1fr;
  }

  .search-controls label:first-child {
    grid-column: auto;
  }

  .hub-nav {
    grid-template-columns: 1fr;
  }

  .hub-section,
  .topic-card,
  .system-card,
  .search-panel {
    padding: 1rem;
  }

  .hub-section__heading,
  .search-result,
  .hub-depth__header,
  .hub-depth__group-heading {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .hub-depth__metrics,
  .hub-depth__species {
    grid-template-columns: 1fr;
  }

  .hub-image-grid {
    grid-template-columns: 1fr;
  }
}