.architecture-concept {
  max-width: 920px;
  margin: 0 auto;
  color: var(--color-text);
}

.architecture-concept__intro,
.architecture-concept__section,
.architecture-concept__sources {
  display: grid;
  gap: 0.85rem;
}

.architecture-concept__intro {
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.architecture-concept__intro-copy {
  display: grid;
  gap: 0.85rem;
}

.architecture-concept__intro > p,
.architecture-concept__intro-copy > p {
  margin: 0;
  line-height: 1.72;
}

.architecture-concept__copy {
  margin: 0;
  line-height: 1.72;
}

.architecture-concept__copy--lead {
  font-size: 1.08rem;
  color: var(--color-heading);
}

.architecture-concept__actions,
.architecture-concept__source-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.architecture-concept__link {
  display: inline-flex;
  align-items: center;
  min-height: 1.6rem;
  padding: 0.14rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-elevated);
  color: var(--color-text-muted);
  font-size: 0.74rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease,
    box-shadow 0.2s ease;
}

.architecture-concept__link:hover,
.architecture-concept__link:focus {
  color: var(--color-link-hover);
  border-color: var(--color-link);
  background: white;
  box-shadow: 0 0 0 3px rgb(0 108 184 / 8%);
  text-decoration: none;
}

.architecture-concept__figure {
  display: grid;
  gap: 0.75rem;
  margin: 0 0 1.5rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-surface);
}

.architecture-concept__figure--compact {
  max-width: 720px;
  margin-right: auto;
  margin-left: auto;
  margin-bottom: 1.5rem;
}

.architecture-concept__figure--small-image img {
  max-width: 560px;
  margin-right: auto;
  margin-left: auto;
}

.architecture-concept__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  background: white;
}

.architecture-concept__caption {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.62;
  color: var(--color-text-muted);
}

.architecture-concept__fact-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0 0 1.6rem;
}

.architecture-concept__fact-strip--aa-index {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.architecture-concept__fact {
  display: grid;
  gap: 0.28rem;
  padding: 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-surface);
}

.architecture-concept__fact-label,
.architecture-concept__sources-label {
  margin: 0;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.architecture-concept__fact-value {
  margin: 0;
  line-height: 1.52;
  color: var(--color-heading);
}

.architecture-concept__fact-value a {
  color: var(--color-link);
  text-decoration: none;
}

.architecture-concept__fact-value a:hover,
.architecture-concept__fact-value a:focus {
  color: var(--color-link-hover);
  text-decoration: underline;
}

.architecture-concept__section {
  margin: 0 0 1.8rem;
}

.architecture-concept__section h2 {
  margin: 0;
  font-size: 1.2rem;
}

.architecture-concept__section p,
.architecture-concept__section ul {
  margin: 0;
  line-height: 1.72;
}

.architecture-concept__section ul {
  padding-left: 1.15rem;
}

.architecture-concept__sources {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.architecture-concept__sources + .architecture-concept__actions {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.architecture-concept__sources + .architecture-concept__actions .architecture-concept__link {
  min-height: 1.95rem;
  padding: 0.28rem 0.78rem;
  border-color: rgb(0 108 184 / 26%);
  background: linear-gradient(180deg, white 0%, rgb(0 108 184 / 5%) 100%);
  color: var(--color-heading);
  font-size: 0.8rem;
  font-weight: 700;
  box-shadow: 0 1px 2px rgb(15 23 42 / 5%);
}

.architecture-concept__sources + .architecture-concept__actions .architecture-concept__link:hover,
.architecture-concept__sources + .architecture-concept__actions .architecture-concept__link:focus {
  color: var(--color-link-hover);
  border-color: var(--color-link);
  background: linear-gradient(180deg, white 0%, rgb(0 108 184 / 9%) 100%);
  box-shadow: 0 0 0 3px rgb(0 108 184 / 10%);
}

@media (max-width: 760px) {
  .architecture-concept__fact-strip {
    grid-template-columns: 1fr;
  }
}