.architecture {
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg);
}

.architecture__diagram {
  position: relative;
  background: var(--bp-bg-surface);
  border: 1px solid var(--bp-border);
  border-radius: var(--radius-md);
  padding: var(--gap-md);
}

.arch-diagram {
  width: 100%;
  height: auto;
}

.arch-block {
  cursor: pointer;
  transition: filter 0.2s;
}

.arch-block:hover rect,
.arch-block:hover .arch-block__border {
  stroke: var(--bp-purple);
  filter: drop-shadow(0 0 6px rgba(176, 137, 255, 0.3));
}

.arch-block:focus-visible rect {
  stroke: var(--bp-purple-light);
  filter: drop-shadow(0 0 8px rgba(176, 137, 255, 0.38));
}

.arch-block rect,
.arch-block__border {
  fill: none;
  stroke: var(--bp-border);
  stroke-width: 1.5;
  rx: 6;
  transition: stroke 0.2s;
}

.arch-block text {
  fill: var(--bp-text-primary);
  font-family: 'Fira Code', monospace;
  font-size: 11px;
}

.arch-block__title {
  fill: var(--bp-text-accent) !important;
  font-weight: 600;
  font-size: 12px !important;
}

.arch-connection {
  stroke: var(--bp-border);
  stroke-width: 1;
  fill: none;
}

.arch-connection-label {
  fill: var(--bp-text-secondary);
  font-family: 'Fira Code', monospace;
  font-size: 9px;
}

.arch-flow-dot {
  r: 3;
  opacity: 0.8;
}

@keyframes flow-forward {
  0% { offset-distance: 0%; opacity: 0; }
  10% { opacity: 0.8; }
  90% { opacity: 0.8; }
  100% { offset-distance: 100%; opacity: 0; }
}

.arch-info-panel {
  position: absolute;
  top: var(--gap-md);
  right: var(--gap-md);
  width: 280px;
  background: var(--bp-bg-secondary);
  border: 1px solid var(--bp-border);
  border-radius: var(--radius-md);
  padding: var(--gap-md);
  opacity: 0;
  transform: translateX(10px);
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
  z-index: 10;
}

.arch-info-panel--visible {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.arch-info-panel__title {
  font-size: 13px;
  font-weight: 600;
  color: var(--bp-text-accent);
  margin-bottom: var(--gap-sm);
}

.arch-info-panel__body {
  font-size: 11px;
  color: var(--bp-text-secondary);
  line-height: 1.6;
  white-space: pre-line;
}

.arch-info-panel__close {
  position: absolute;
  top: 8px;
  right: 8px;
  background: none;
  border: none;
  color: var(--bp-text-secondary);
  font-size: 16px;
  cursor: pointer;
  padding: 2px 6px;
  line-height: 1;
}

.arch-info-panel__close:hover {
  color: var(--bp-text-accent);
}

.arch-legend {
  display: flex;
  gap: var(--gap-lg);
  flex-wrap: wrap;
  font-size: 11px;
  color: var(--bp-text-secondary);
}

.arch-legend__item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.arch-legend__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

@media (max-width: 980px) {
  .arch-info-panel {
    position: static;
    width: 100%;
    margin-top: var(--gap-md);
    transform: none;
  }
}