/**
 * arch.css — Architecture diagram
 * Depends on: rho-vars.css (--r-* tokens)
 */

.arch-diagram {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  align-items: center;
}
.arch-col { display: flex; flex-direction: column; gap: 12px; }
.arch-label {
  font-family: var(--r-font-mono);
  font-size: 11px;
  color: var(--r-text3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}
.arch-box {
  background: var(--r-bg2);
  border: 1px solid var(--r-border2);
  border-radius: 8px;
  padding: 16px 20px;
  transition: all 0.2s;
}
.arch-box:hover { border-color: var(--r-accent); }
.arch-box.is-ar { border-left: 3px solid var(--r-accent); }
.arch-box.is-be { border-left: 3px solid var(--r-cyan); }
.arch-box-name {
  font-family: var(--r-font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--r-accent);
  margin-bottom: 4px;
}
.arch-box-name.cyan { color: var(--r-cyan); }
.arch-box-sub { font-size: 12px; color: var(--r-text3); line-height: 1.5; }
.arch-arrow-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.arch-arrow-line {
  width: 2px;
  height: 40px;
  background: linear-gradient(180deg, var(--r-accent), var(--r-cyan));
}
.arch-arrow-label {
  font-family: var(--r-font-mono);
  font-size: 9px;
  color: var(--r-text3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.arch-sync-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--r-font-mono);
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 20px;
  border: 1px solid var(--r-border);
  color: var(--r-text3);
  white-space: nowrap;
  margin-top: 8px;
}

@media (max-width: 900px) {
  .arch-diagram { grid-template-columns: 1fr; gap: 1rem; }
}