.memos-architecture {
  margin: 2rem 0;
}

.memos-architecture__diagram {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--entry);
  padding: clamp(1rem, 3vw, 1.5rem);
}

.memos-architecture__tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.4rem;
  margin-bottom: 1.2rem;
}

.memos-architecture__tabs button {
  min-width: 0;
  min-height: 2.5rem;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--secondary);
  font: 0.85rem/1.3 var(--zine-mono);
  cursor: pointer;
}

.memos-architecture__tabs button[aria-selected="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.memos-architecture__tabs button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.memos-architecture__panel[hidden] {
  display: none;
}

.memos-architecture__section + .memos-architecture__section {
  border-top: 1px solid var(--border);
  margin-top: 1.4rem;
  padding-top: 1.4rem;
}

.memos-architecture__label {
  margin: 0 0 0.8rem !important;
  color: var(--secondary);
  font: 0.75rem/1.4 var(--zine-mono);
  letter-spacing: 0.04em;
}

.memos-architecture__flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 1.5rem minmax(0, 1fr) 1.5rem minmax(0, 1fr);
  align-items: center;
  gap: 0.35rem;
}

.memos-architecture__flow--four {
  grid-template-columns: minmax(0, 1fr) 1.2rem minmax(0, 1fr) 1.2rem minmax(0, 1fr) 1.2rem minmax(0, 1fr);
}

.memos-architecture__data {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.memos-architecture__node {
  min-width: 0;
  min-height: 4.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0.65rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--theme);
}

.memos-architecture__node--accent {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.memos-architecture__name,
.memos-architecture__detail {
  display: block;
  overflow-wrap: anywhere;
}

.memos-architecture__name {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.35;
}

.memos-architecture__node--accent .memos-architecture__name {
  color: var(--accent-strong);
}

.memos-architecture__detail {
  margin-top: 0.25rem;
  color: var(--secondary);
  font-size: 0.75rem;
  line-height: 1.4;
}

.memos-architecture__arrow {
  color: var(--secondary);
  font: 1rem/1 var(--zine-mono);
  text-align: center;
}

.memos-architecture figcaption {
  margin-top: 0.65rem;
  color: var(--secondary);
  font-size: 0.8rem;
  line-height: 1.5;
  text-align: left;
}

@media (max-width: 620px) {
  .memos-architecture__flow,
  .memos-architecture__flow--four {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.35rem;
  }

  .memos-architecture__arrow {
    transform: rotate(90deg);
  }

  .memos-architecture__data {
    grid-template-columns: minmax(0, 1fr);
  }

  .memos-architecture__node {
    min-height: 3.6rem;
  }
}