/* ======================================================================
   OATS diagrams — shared styles for Figures 0–5.
   Monochrome + single gold accent. Thin borders. Mono labels.
   Matches the canonical OATS landing page.
   ====================================================================== */

.diagram {
  --dg-border: #2a2a35;
  --dg-border-strong: #3a3a48;
  --dg-accent: #c8a44e;
  --dg-accent-dim: #a08030;
  --dg-accent-glow: rgba(200, 164, 78, 0.12);
  --dg-accent-glow-strong: rgba(200, 164, 78, 0.25);
  --dg-red: #c45050;
  --dg-green: #5a9a6a;
  --dg-blue: #5080b0;
  --dg-text: #e8e6e1;
  --dg-text-2: #9a9790;
  --dg-text-3: #6b6860;
  --dg-bg: #131318;
  --dg-bg-2: #1a1a22;

  position: relative;
  background: var(--dg-bg);
  border: 1px solid var(--dg-border);
  border-radius: 4px;
  padding: 0.7rem 1.75rem 1.25rem;
  margin: 2rem 0;
  overflow: hidden;
}

.diagram-eyebrow {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dg-accent-dim);
  margin-bottom: 1.3rem;
}

.diagram-caption {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid #1e1e28;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--dg-text-3);
}
.diagram-caption strong {
  color: var(--dg-text-2);
  font-weight: 600;
}

.diagram-controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed #1e1e28;
}
.diagram-controls .label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dg-text-3);
  margin-right: 0.5rem;
  white-space: nowrap;
}
.dg-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.7rem;
  background: transparent;
  color: var(--dg-text-2);
  border: 1px solid var(--dg-border);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.18s ease;
}
.dg-btn:hover {
  color: var(--dg-accent);
  border-color: var(--dg-accent-dim);
  background: var(--dg-accent-glow);
}
.dg-btn.active {
  color: var(--dg-accent);
  border-color: var(--dg-accent);
  background: var(--dg-accent-glow);
}
.dg-btn.danger.active {
  color: var(--dg-red);
  border-color: var(--dg-red);
  background: rgba(196, 80, 80, 0.08);
}

/* ===== shared primitives ===== */
.dg-svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}
.dg-svg text {
  font-family: 'JetBrains Mono', monospace;
  fill: var(--dg-text-2);
  font-size: 11px;
  letter-spacing: 0.04em;
}
.dg-svg .label-major {
  font-family: 'DM Serif Display', Georgia, serif;
  fill: var(--dg-text);
  font-size: 14px;
  letter-spacing: 0;
}
.dg-svg .label-mono-sm { font-size: 9.5px; letter-spacing: 0.1em; text-transform: uppercase; fill: var(--dg-text-3); }
.dg-svg .label-mono    { font-size: 10.5px; letter-spacing: 0.06em; fill: var(--dg-text-2); }
.dg-svg .label-accent  { fill: var(--dg-accent); }
.dg-svg .box {
  fill: var(--dg-bg-2);
  stroke: var(--dg-border-strong);
  stroke-width: 1;
}
.dg-svg .box-accent {
  fill: var(--dg-accent-glow);
  stroke: var(--dg-accent);
  stroke-width: 1;
}
.dg-svg .box-accent-strong {
  fill: var(--dg-accent-glow-strong);
  stroke: var(--dg-accent);
  stroke-width: 1.5;
}
.dg-svg .arrow {
  fill: none;
  stroke: var(--dg-border-strong);
  stroke-width: 1.2;
}
.dg-svg .arrow-accent {
  stroke: var(--dg-accent);
  stroke-width: 1.5;
}
.dg-svg .arrow-deny {
  stroke: var(--dg-red);
  stroke-width: 1.2;
  stroke-dasharray: 3 3;
}
.dg-svg .active-box {
  fill: var(--dg-accent-glow-strong);
  stroke: var(--dg-accent);
  stroke-width: 1.8;
}
.dg-svg .active-box + text,
.dg-svg g.active text {
  fill: var(--dg-text);
}

/* ============================================================
   FIGURE 0 — trust stack
   ============================================================ */
.fig0-layer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--dg-border);
  background: var(--dg-bg-2);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 0.5rem;
  position: relative;
}
.fig0-layer:hover, .fig0-layer.active {
  border-color: var(--dg-accent);
  background: var(--dg-accent-glow);
}
.fig0-layer .num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--dg-accent-dim);
  min-width: 36px;
}
.fig0-layer.active .num { color: var(--dg-accent); }
.fig0-layer .name {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.05rem;
  color: var(--dg-text);
  flex: 1;
}
.fig0-layer .q {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--dg-text-3);
  letter-spacing: 0.03em;
  font-style: italic;
  text-align: right;
  max-width: 50%;
}
.fig0-detail {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--dg-border);
  border-left: 3px solid var(--dg-accent);
  border-radius: 0 4px 4px 0;
  background: var(--dg-bg-2);
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--dg-text-2);
  min-height: 5.5rem;
}
.fig0-detail .t {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dg-accent);
  margin-bottom: 0.4rem;
}

/* ============================================================
   FIGURE 1 — ORGA loop
   ============================================================ */
.fig1-stage { position: relative; }
.fig1-legend {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--dg-text-3);
  letter-spacing: 0.05em;
}
.fig1-legend .swatch {
  display: inline-block;
  width: 16px;
  height: 2px;
  vertical-align: middle;
  margin-right: 0.4rem;
}
.sw-arrow { background: var(--dg-accent); }
.sw-deny {
  background-image: linear-gradient(to right, var(--dg-red) 0, var(--dg-red) 3px, transparent 3px, transparent 6px);
  background-size: 6px 2px;
  height: 2px;
}

/* ============================================================
   FIGURE 2 — deny vs allow
   ============================================================ */
.fig2-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.fig2-col {
  border: 1px solid var(--dg-border);
  border-radius: 4px;
  padding: 1rem 1rem 0.8rem;
  background: var(--dg-bg-2);
}
.fig2-col h5 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 0.8rem;
}
.fig2-col.deny h5 { color: var(--dg-red); }
.fig2-col.allow h5 { color: var(--dg-green); }
.fig2-col .outcome {
  margin-top: 0.75rem;
  padding: 0.6rem 0.75rem;
  border: 1px dashed var(--dg-border-strong);
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  line-height: 1.6;
  color: var(--dg-text-2);
  min-height: 3.4rem;
}
.fig2-col .outcome.pass { border-color: var(--dg-green); color: var(--dg-green); background: rgba(90, 154, 106, 0.08); }
.fig2-col .outcome.block { border-color: var(--dg-red); color: var(--dg-red); background: rgba(196, 80, 80, 0.08); }
.fig2-col .outcome.reject { border-color: var(--dg-accent-dim); color: var(--dg-accent); background: var(--dg-accent-glow); }

.fig2-input {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}
.fig2-input code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  padding: 0.3rem 0.5rem;
  background: var(--dg-bg);
  border: 1px solid var(--dg-border);
  color: var(--dg-text);
  border-radius: 2px;
  word-break: break-all;
}

/* ============================================================
   FIGURE 4 — action classification pipeline
   ============================================================ */
.fig4-legend-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 0.4rem;
  vertical-align: middle;
}

/* ============================================================
   FIGURE 5 — hash-chained journal
   ============================================================ */
.fig5-entries {
  display: flex;
  gap: 0;
  overflow-x: auto;
  padding: 0.25rem 0 0.75rem;
  align-items: stretch;
}
.fig5-entry {
  flex: 0 0 180px;
  position: relative;
  border: 1px solid var(--dg-border-strong);
  background: var(--dg-bg-2);
  border-radius: 3px;
  padding: 0.7rem 0.75rem 0.75rem;
  margin-right: 18px;
  transition: all 0.2s ease;
  cursor: pointer;
}
.fig5-entry:last-child { margin-right: 0; }
.fig5-entry::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -19px;
  width: 18px;
  height: 1px;
  background: var(--dg-accent);
  transform: translateY(-50%);
}
.fig5-entry:last-child::after { display: none; }
.fig5-entry .seq {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.56rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dg-accent-dim);
  margin-bottom: 0.3rem;
}
.fig5-entry .type {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 0.92rem;
  color: var(--dg-text);
  margin-bottom: 0.5rem;
  line-height: 1.15;
}
.fig5-entry .field {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.58rem;
  line-height: 1.55;
  color: var(--dg-text-3);
  word-break: break-all;
}
.fig5-entry .field .k { color: var(--dg-accent-dim); letter-spacing: 0.05em; }
.fig5-entry .field .hash { color: var(--dg-text-2); }
.fig5-entry.tampered {
  border-color: var(--dg-red);
  background: rgba(196, 80, 80, 0.08);
}
.fig5-entry.tampered .type { color: var(--dg-red); }
.fig5-entry.broken-chain::after { background: var(--dg-red); }
.fig5-entry.broken-chain { outline: 1px dashed var(--dg-red); outline-offset: 3px; }
.fig5-entry.hover-highlight {
  border-color: var(--dg-accent);
  background: var(--dg-accent-glow);
}

.fig5-status {
  margin-top: 0.5rem;
  padding: 0.7rem 1rem;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
}
.fig5-status.ok     { color: var(--dg-green); border: 1px solid var(--dg-green); background: rgba(90, 154, 106, 0.06); }
.fig5-status.broken { color: var(--dg-red);   border: 1px solid var(--dg-red);   background: rgba(196, 80, 80, 0.08); }