/* ==========================================================================
   Inline AI infrastructure flow diagrams (Fig. 01–03)
   Scoped under .ai-flow so height follows content — no iframes.
   Type: match site mono labels (12–13px / weight 400 / #6b6b6b on paper).
   ========================================================================== */

.ai-flow {
  --ai-flow-ink: #111318;
  /* Site secondary (#6b6b6b on #F8F6F1) — AA for text ≥12px / regular */
  --ai-flow-muted: #6b6b6b;
  --ai-flow-border: rgba(17, 19, 24, 0.12);
  --ai-flow-border-strong: rgba(17, 19, 24, 0.24);
  --ai-flow-node-bg: #f4f5f0;
  --ai-flow-problem: #a12e23;
  --ai-flow-pre: #157a5f;
  --ai-flow-llm: #274fad;
  --ai-flow-reviewer: #157a5f;
  --ai-flow-dsm: #274fad;
  --ai-flow-pm: #5a42b0;
  --ai-flow-quality: #9a5f0d;

  position: relative;
  width: 100%;
  box-sizing: border-box;
  border: var(--frame-border);
  background-color: var(--color-bg);
  padding: 16px 18px;
  isolation: isolate;
  overflow: hidden;
  font-family: "DM Mono", "IBM Plex Mono", ui-monospace, monospace;
  font-weight: 400;
  font-size: 13px;
  line-height: 1.45;
  color: var(--ai-flow-ink);
}

/* Paper grain */
.ai-flow::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: var(--paper-opacity);
  background-image: url("Images/paper-grain.png");
  background-repeat: repeat;
  background-size: var(--paper-grain-size) var(--paper-grain-size);
  background-attachment: scroll;
}

/* Blueprint grid (same dual-scale as site .grid-bg) */
.ai-flow::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--grid-pattern-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-pattern-major) 1px, transparent 1px),
    linear-gradient(var(--grid-pattern-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-pattern-minor) 1px, transparent 1px);
  background-size: 80px 80px, 80px 80px, 16px 16px, 16px 16px;
}

@media (hover: hover) and (pointer: fine) and (min-width: 901px) {
  .ai-flow::before {
    background-attachment: fixed;
  }
}

@media (max-width: 900px) {
  .ai-flow::before {
    background-attachment: scroll;
    background-size: var(--paper-grain-size) var(--paper-grain-size);
  }
}

.ai-flow__inner {
  position: relative;
  z-index: 1;
  width: 100%;
}

.ai-flow__desktop {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.ai-flow__mobile {
  display: none;
}

.ai-flow__col-head {
  display: flex;
  align-items: center;
  margin-bottom: 6px;
  padding-bottom: 5px;
  border-bottom: 1px dashed var(--ai-flow-border-strong);
}

.ai-flow__col {
  width: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ai-flow-muted);
}

.ai-flow__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.ai-flow__dot--pre {
  background: var(--ai-flow-pre);
}

.ai-flow__dot--llm {
  background: var(--ai-flow-llm);
}

.ai-flow__legend {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--ai-flow-border);
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  align-items: center;
}

.ai-flow__legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--ai-flow-muted);
  letter-spacing: 0.04em;
}

.ai-flow__legend-line {
  width: 28px;
  height: 1px;
  background: var(--ai-flow-border-strong);
}

.ai-flow__legend-line--peer {
  background: none;
  border-top: 1px dashed rgba(17, 19, 24, 0.35);
}

/* Mobile stacks */
.ai-flow__stack {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.ai-flow__stack-inputs {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ai-flow__node {
  border: 1px solid var(--ai-flow-border-strong);
  background: var(--ai-flow-node-bg);
  padding: 10px 12px;
  text-align: center;
  color: var(--ai-flow-muted);
  font-size: 13px;
  line-height: 1.45;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ai-flow__node strong {
  display: block;
  font-weight: 400;
  font-size: 13px;
  color: var(--ai-flow-ink);
  margin-bottom: 2px;
}

.ai-flow__node--problem {
  border-color: var(--ai-flow-problem);
  background: var(--ai-flow-node-bg);
  color: var(--ai-flow-problem);
  padding: 16px 14px;
}

.ai-flow__node--problem strong {
  color: var(--ai-flow-problem);
}

.ai-flow__node--pre {
  border-color: var(--ai-flow-pre);
  background: rgba(21, 122, 95, 0.08);
}

.ai-flow__node--pre strong {
  color: var(--ai-flow-pre);
}

.ai-flow__node--llm {
  border-color: var(--ai-flow-llm);
  background: rgba(39, 79, 173, 0.08);
}

.ai-flow__node--llm strong {
  color: var(--ai-flow-llm);
}

.ai-flow__node--orch {
  border-color: rgba(17, 19, 24, 0.32);
}

.ai-flow__node--orch strong {
  color: var(--ai-flow-ink);
}

.ai-flow__node--reviewer {
  border-color: var(--ai-flow-reviewer);
}

.ai-flow__node--reviewer strong {
  color: var(--ai-flow-reviewer);
}

.ai-flow__node--dsm {
  border-color: var(--ai-flow-dsm);
}

.ai-flow__node--dsm strong {
  color: var(--ai-flow-dsm);
}

.ai-flow__node--pm {
  border-color: var(--ai-flow-pm);
}

.ai-flow__node--pm strong {
  color: var(--ai-flow-pm);
}

.ai-flow__node--quality {
  border-color: var(--ai-flow-quality);
}

.ai-flow__node--quality strong {
  color: var(--ai-flow-quality);
}

.ai-flow__arrow {
  text-align: center;
  color: var(--ai-flow-muted);
  font-size: 13px;
  padding: 8px 0;
  line-height: 1.35;
}

.ai-flow__arrow span {
  display: block;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 2px;
}

.ai-flow__branch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 4px;
}

/* Fig. 03 mobile: clear primary path, then peer agents */
.ai-flow__path {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.ai-flow__peers-label {
  margin: 16px 0 8px;
  padding-top: 12px;
  border-top: 1px dashed var(--ai-flow-border-strong);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ai-flow-muted);
  text-align: center;
}

.ai-flow__peers {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

@media (max-width: 900px) {
  .ai-flow {
    padding: 14px 12px;
  }

  .ai-flow__desktop,
  .ai-flow__col-head,
  .ai-flow__legend {
    display: none !important;
  }

  .ai-flow__mobile {
    display: block;
    width: 100%;
  }
}