/* Project diagrams — static schematics */
.diagram {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 8px 0;
}
.diag-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.diag-section-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
}

/* Workflow nodes — horizontal chain */
.diag-nodes {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 6px;
}
.diag-node {
  flex: 1 1 100px;
  min-width: 92px;
  padding: 14px 12px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}
.diag-node-num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.08em;
}
.diag-node-name {
  font-size: 13px;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.3;
}
.diag-arrow {
  align-self: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-3);
  user-select: none;
}
.diag-arrow-back { color: var(--accent); }

.diag-loop-hint {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  padding: 6px 10px;
  background: var(--bg-soft);
  border-radius: 999px;
  align-self: flex-start;
}
.diag-loop-arrow { color: var(--accent); font-size: 13px; }

/* Stack — three-layer scaffold */
.diag-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.diag-stack-row {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  align-items: start;
  padding: 12px 14px;
  background: var(--bg-soft);
  border-left: 2px solid var(--accent);
  border-radius: 0 8px 8px 0;
}
.diag-stack-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
}
.diag-stack-h { font-size: 14px; font-weight: 500; color: var(--ink); }
.diag-stack-b { margin-top: 4px; font-size: 13px; color: var(--ink-2); }

/* Loop — eval iteration */
.diag-loop {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.diag-loop-step {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px dashed var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--ink);
}
.diag-loop-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 18px; height: 18px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 10px;
}

/* Outcome row */
.diag-outcome {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 8px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  overflow: hidden;
}
@media (max-width: 640px) { .diag-outcome { grid-template-columns: repeat(2, 1fr); } }
.diag-outcome-cell {
  background: var(--bg-card);
  padding: 14px 16px;
}
.diag-outcome-v {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--ink);
  letter-spacing: -0.01em;
  font-style: italic;
}
.diag-outcome-l {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.diag-outcome-ref {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  opacity: 0.75;
  font-style: italic;
}
.diag-caption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-2);
  font-style: italic;
  padding-left: 10px;
  border-left: 2px solid var(--ink-3);
  opacity: 0.85;
}

/* Prism — comparison columns */
.diag-compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
}
@media (max-width: 720px) { .diag-compare { grid-template-columns: 1fr; } }
.diag-compare-col {
  padding: 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
}
.diag-compare-old { background: var(--bg-soft); opacity: 0.85; }
.diag-compare-new { background: var(--bg-card); border-color: var(--accent); }
.diag-compare-h {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-2);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.diag-compare-new .diag-compare-h { color: var(--accent); }
.diag-compare-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.diag-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-2);
  background: var(--bg);
}
.diag-tag-strong {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.diag-compare-vs {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 18px;
  color: var(--ink-3);
  text-align: center;
}

/* Pipeline */
.diag-pipeline {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 6px;
}
.diag-pipe-step {
  flex: 1 1 140px;
  min-width: 130px;
  padding: 14px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.diag-pipe-h { font-size: 13px; font-weight: 500; color: var(--ink); }
.diag-pipe-b { margin-top: 6px; font-size: 12px; color: var(--ink-2); line-height: 1.5; }

/* Symbiosis */
.diag-symbiosis {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;
}
@media (max-width: 720px) { .diag-symbiosis { grid-template-columns: 1fr; } }
.diag-symb-box {
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.diag-symb-h {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 18px;
  color: var(--accent);
}
.diag-symb-b {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.6;
  white-space: pre-wrap;
}
.diag-symb-flow {
  display: flex;
  flex-direction: column;
  gap: 6px;
  justify-content: center;
  min-width: 140px;
}
.diag-symb-line {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  padding: 4px 0;
  border-bottom: 1px dashed var(--line);
  text-align: center;
  position: relative;
}
.diag-symb-line-r::after { content: '→'; margin-left: 6px; color: var(--accent); }
.diag-symb-line-l::before { content: '←'; margin-right: 6px; color: var(--accent); }
@media (max-width: 720px) {
  .diag-symb-line-r::after { content: '↓'; display: block; }
  .diag-symb-line-l::before { content: '↑'; display: block; }
}