/* Б-23 Схема трёх звеньев. Источник: новый макет (задача 6.3) */

.b-architecture {
  padding-block: var(--space-section);
  background: var(--color-surface);
}

.b-architecture__scheme {
  display: grid;
  gap: 0;
  list-style: none;
}

.b-architecture__node {
  display: grid;
  align-content: start;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-5);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.b-architecture__node--core {
  border-color: transparent;
  background: var(--gradient-accent-panel);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-accent);
}

.b-architecture__name {
  font-size: var(--fs-h3);
}

.b-architecture__text {
  color: var(--color-text-muted);
}

.b-architecture__node--core .b-architecture__text {
  color: var(--color-text-inverse-muted);
}

/* Связь между звеньями */
.b-architecture__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: 4.5rem;
  padding: var(--space-3) 0;
}

.b-architecture__link::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: repeating-linear-gradient(180deg, var(--color-accent) 0 6px, transparent 6px 12px);
  transform: translateX(-50%);
}

.b-architecture__flow {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.25rem var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  font-size: var(--fs-caption);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
}

.b-architecture__flow::after {
  content: "↓";
}

.b-architecture__flow--back::after {
  content: "↑";
}

.b-architecture__footer {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-stack);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface-muted);
}

.b-architecture__caption {
  font-size: var(--fs-lead);
  font-weight: var(--font-weight-bold);
  line-height: var(--lh-snug);
}

@media (min-width: 1024px) {
  .b-architecture__scheme {
    grid-template-columns: minmax(0, 1fr) 9.5rem minmax(0, 1fr) 9.5rem minmax(0, 1fr);
    align-items: stretch;
  }

  .b-architecture__node {
    padding: var(--space-7) var(--space-6);
  }

  .b-architecture__link {
    min-height: 0;
    padding: 0;
  }

  .b-architecture__link::before {
    top: 50%;
    right: 0;
    bottom: auto;
    left: 0;
    width: auto;
    height: 2px;
    background: repeating-linear-gradient(90deg, var(--color-accent) 0 6px, transparent 6px 12px);
    transform: translateY(-50%);
  }

  .b-architecture__flow {
    white-space: normal;
    text-align: center;
  }

  .b-architecture__flow::after {
    content: "→";
  }

  .b-architecture__flow--back::after {
    content: none;
  }

  .b-architecture__flow--back::before {
    content: "←";
  }

  .b-architecture__footer {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: var(--space-5) var(--space-6);
  }
}