/* DAMON MCTS demo: flat, square-cornered, page palette.
 * Motion only during a reader-started Play: discrete search iterations, no tweening; nothing moves on load. */
.safety-demo {
  --sf-sel: var(--accent);
  --sf-warm: #9a5a3c;
  --sf-rule: #e8ece7;
  --sf-faint: #aab3ad;
  margin-top: 18px;
  padding: 27px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.65;
}
.safety-demo [hidden] { display: none !important; }
.safety-demo *, .safety-demo *::before { border-radius: 0; }
.safety-demo .sf-heading { margin-bottom: 20px; }
.safety-demo .sf-heading h3 { margin: 6px 0 10px; }
.safety-demo .sf-heading p { margin: 0; max-width: 760px; }
.safety-demo .sf-small-label { display: block; margin: 0 0 6px; color: var(--muted); font-size: 10.5px; font-weight: 600; letter-spacing: .08em; line-height: 1.5; text-transform: uppercase; }
.safety-demo .sf-eyebrow { color: var(--accent); font-size: 10px; letter-spacing: .1em; }
.safety-demo h4 { margin: 0 0 10px; font: 400 18px/1.4 Georgia, serif; }
.safety-demo h5 { margin: 0 0 8px; }
.safety-demo code { font: 11.5px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--muted); }

.safety-demo .sf-workspace { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 30px; align-items: start; }
.safety-demo .sf-figure { margin: 0; min-width: 0; }

/* Tree */
.safety-demo .sf-tree-scroll { overflow-x: auto; }
.safety-demo .sf-tree-scroll:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.safety-demo .sf-tree { display: block; width: 100%; min-width: 468px; height: auto; border: 1px solid var(--sf-rule); background: #fcfdfb; }
.safety-demo .sf-edge { stroke: var(--sf-faint); stroke-width: 1.3; }
.safety-demo .sf-edge.is-selected { stroke: var(--sf-sel); stroke-width: 2.6; }
.safety-demo .sf-edge.is-pruned { stroke: var(--sf-rule); stroke-dasharray: 3 4; }
.safety-demo .sf-edge-label { fill: var(--muted); font: 10px -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; text-anchor: middle; }
.safety-demo .sf-node rect { fill: #fff; stroke: var(--ink); stroke-width: 1.2; }
.safety-demo .sf-node.is-root rect { fill: var(--wash); }
.safety-demo .sf-node.is-leaf rect { stroke: #b7c0ba; }
.safety-demo .sf-node.is-selected rect { stroke: var(--sf-sel); stroke-width: 2.2; }
.safety-demo .sf-node.is-expanded rect { stroke: var(--sf-sel); stroke-width: 2.2; fill: #eef3f0; }
.safety-demo .sf-node.is-pruned rect { stroke: var(--sf-faint); fill: #f4f6f4; }
.safety-demo .sf-node.is-pruned text { fill: var(--sf-faint); }
.safety-demo .sf-node.is-success rect { stroke: var(--sf-warm); stroke-width: 2.4; }
.safety-demo .sf-node-title { fill: var(--ink); font: 600 12px -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; text-anchor: middle; }
.safety-demo .sf-node.is-success .sf-node-title { fill: var(--sf-warm); }
.safety-demo .sf-node-stat { fill: var(--muted); font: 10.5px ui-monospace, SFMono-Regular, Menlo, monospace; text-anchor: middle; font-variant-numeric: tabular-nums; }
.safety-demo .sf-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 10px 0 0; color: var(--muted); font-size: 12px; }
.safety-demo .sf-key { display: inline-flex; align-items: center; gap: 6px; }
.safety-demo .sf-key i { display: inline-block; width: 18px; height: 0; border-top: 2px solid var(--sf-faint); }
.safety-demo .sf-key.is-selected i { border-top: 2px solid var(--sf-sel); }
.safety-demo .sf-key.is-expanded i { border-top: 3px solid var(--sf-sel); }
.safety-demo .sf-key.is-pruned i { border-top: 2px dashed var(--sf-faint); }

/* Play controls */
.safety-demo .rd-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 12px; margin: 14px 0 0; }
.safety-demo button {
  min-height: 34px; margin: 0; padding: 6px 13px; border: 1px solid #bbc8bf; background: #fff; color: var(--ink);
  font: inherit; font-size: 13px; line-height: 1.3; cursor: pointer;
}
.safety-demo button:hover { background: var(--wash); }
.safety-demo button[aria-pressed="true"] { border-color: var(--accent); background: var(--accent); color: #fff; }
.safety-demo button:disabled { cursor: default; color: #a3aba6; background: #f6f7f5; border-color: var(--line); }
.safety-demo button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.safety-demo .sf-iter-status { color: var(--muted); font-size: 12px; }

/* Readout */
.safety-demo .sf-readout { min-width: 0; }
.safety-demo .sf-stages { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--sf-rule); }
.safety-demo .sf-stages li { display: grid; grid-template-columns: 7.3rem minmax(0, 1fr); gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--sf-rule); font-size: 13px; }
.safety-demo .sf-stages strong { font-weight: 600; }
.safety-demo .sf-stages li.is-active { color: var(--ink); }
.safety-demo .sf-stages li.is-active strong { color: var(--accent); }
.safety-demo .sf-summary { margin: 14px 0 0; font-size: 13px; line-height: 1.6; }
.safety-demo .sf-summary.is-success { color: var(--sf-warm); font-weight: 600; }

/* Controls */
.safety-demo .sf-controls { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 24px; margin: 22px 0 0; padding-top: 18px; border-top: 1px solid var(--line); }
.safety-demo .sf-rewards { display: grid; gap: 4px; }
.safety-demo .sf-reward-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 4px 0; border-bottom: 1px solid var(--sf-rule); font-size: 12.5px; }
.safety-demo .sf-reward-stepper { display: inline-flex; align-items: center; gap: 0; }
.safety-demo .sf-reward-stepper button { width: 32px; min-height: 32px; padding: 0; font-size: 15px; }
.safety-demo .sf-reward-stepper output { display: inline-block; min-width: 2.2em; text-align: center; font-variant-numeric: tabular-nums; }
.safety-demo .sf-prunes { display: grid; gap: 7px; }
.safety-demo .sf-prune { display: flex; align-items: center; gap: 8px; font-size: 12.5px; line-height: 1.4; }
.safety-demo .sf-prune input { width: 16px; height: 16px; accent-color: var(--accent); }
.safety-demo .sf-prune-help { margin: 10px 0 0; color: var(--muted); font-size: 11.5px; line-height: 1.55; }

.safety-demo .sf-note { margin: 20px 0 0; padding: 12px 14px; border: 1px solid var(--sf-rule); background: var(--wash); font-size: 12.5px; line-height: 1.6; }
.safety-demo .sf-footnote { margin: 14px 0 0; color: var(--muted); font-size: 12px; line-height: 1.7; max-width: 860px; }

@media (max-width: 820px) {
  .safety-demo .sf-workspace { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .safety-demo .sf-controls { grid-template-columns: minmax(0, 1fr); gap: 18px; }
}
@media (max-width: 700px) {
  .safety-demo { padding: 20px 16px; }
}

/* Stepwise iteration only; no tweening, so the reduced-motion path is identical.
 * Nothing animates on page load. */