/* Recorded research episodes, with evidence and structures shown together. */
.method-step.is-current { border-top-color: var(--green); }
.method-step.is-current h3 { color: var(--green); }

.iteration-demo {
  --iteration-mint: #315b48;
  --iteration-peach: #b16b42;
  --iteration-blue: #5076aa;
  --iteration-text: #24342e;
  --iteration-muted: #46554c;
  --iteration-line: #cbd3c7;
  --iteration-surface: #fff;
  --iteration-card: #fff;
  position: relative;
  margin-top: 36px;
  padding: 32px;
  overflow: hidden;
  border: 1px solid #d5dbd0;
  border-radius: 12px;
  background: var(--paper, #f7f6f2);
  color: var(--iteration-text);
  box-shadow: none;
  font: 17px/1.6 var(--sans, Arial, sans-serif);
}
.iteration-demo [hidden] { display: none !important; }
.iteration-demo button, .iteration-demo a { -webkit-tap-highlight-color: transparent; }
.iteration-demo button { font: inherit; }
.iteration-demo button:focus-visible, .iteration-demo a:focus-visible {
  outline: 3px solid var(--iteration-mint);
  outline-offset: 4px;
}
.iteration-demo p, .iteration-demo h3, .iteration-demo h4 { margin: 0; }
.iteration-demo-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 16px;
}
.iteration-demo-eyebrow {
  color: var(--iteration-mint);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 1.6px;
}
.iteration-demo #iteration-title {
  max-width: 760px;
  margin-top: 9px;
  font: 32px/1.2 var(--serif, Georgia, serif);
  font-weight: 400;
  letter-spacing: -.8px;
  text-wrap: balance;
}
.iteration-demo-intro { display: none; }
.iteration-demo-target { margin-top: 6px !important; color: var(--iteration-muted); font-size: 16px; }
.iteration-demo #iteration-case-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  margin-top: 10px;
  padding: 9px 14px;
  border: 1px solid var(--iteration-line);
  border-radius: 24px;
  color: var(--iteration-text);
  text-decoration: none;
  font-size: 16px;
  transition: background .2s, border-color .2s;
}
.iteration-demo #iteration-case-link:hover { background: #eef2e9; border-color: #69947d; }
.iteration-success-caption { margin-bottom: 6px !important; color: var(--iteration-muted); font-size: 16px; }
.iteration-demo #iteration-case-options { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; margin-bottom: 16px; }
.iteration-demo #iteration-case-options button {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 9px;
  min-width: 0;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-bottom-color: var(--iteration-line);
  border-radius: 4px;
  background: transparent;
  color: var(--iteration-text);
  text-align: left;
  cursor: pointer;
}
.iteration-demo #iteration-case-options button:hover:not(:disabled), .iteration-demo #iteration-case-options button[aria-pressed="true"] { border-bottom-color: #8ea795; background: #eef2e9; }
.iteration-demo #iteration-case-options button:disabled { opacity: .65; cursor: wait; }
.iteration-case-id { font-size: 17px; font-weight: 600; }
.iteration-case-scores { display: flex; align-items: center; gap: 5px; font-size: 18px; line-height: 1.2; font-variant-numeric: tabular-nums; letter-spacing: -.3px; }
.iteration-case-scores > span { color: var(--iteration-muted); }
.iteration-case-scores > strong { color: var(--iteration-mint); font-weight: 500; }
.iteration-case-theme { grid-column: 1 / -1; color: var(--iteration-muted); font-size: 16px; line-height: 1.4; }
.iteration-demo.is-result-summary #iteration-replay { display: none; }
.iteration-demo-main { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(0, 1fr); gap: 32px; align-items: start; }
.iteration-model-panel, .iteration-story-panel, .iteration-msa-panel, .iteration-trajectory-panel { min-width: 0; }
.iteration-structure-stage {
  position: relative;
  height: 440px;
  min-height: 420px;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid #bccbbb;
  border-radius: 8px;
  background: var(--iteration-surface);
}
.iteration-demo #iteration-structure { position: absolute; inset: 0; width: 100%; height: 100%; }
.iteration-demo #iteration-structure canvas { display: block; }
.iteration-demo #iteration-process-visual {
  position: absolute;
  z-index: 1;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 20px;
  padding: 56px 20px 24px;
  background: var(--iteration-surface);
  animation: iteration-evidence-reveal .35s ease both;
}
.iteration-demo[data-visual="process"] .iteration-structure-stage { height: auto; }
.iteration-demo[data-visual="process"] #iteration-process-visual { position: relative; inset: auto; min-height: 440px; }
.iteration-demo #iteration-process-visual > svg { display: block; width: 100%; height: auto; max-height: none; overflow: visible; }
.iteration-demo svg.iteration-msa-diagram { display: block; width: 100%; height: auto; min-height: 160px; max-height: none; overflow: visible; }
.iteration-demo #iteration-visual-caption { margin-top: 11px; color: var(--iteration-muted); font-size: 16px; line-height: 1.5; }
.iteration-demo .iteration-process-heading { color: var(--iteration-text); font-size: 24px; font-weight: 600; line-height: 1.35; text-align: center; text-wrap: balance; }
.iteration-demo .iteration-analysis-flow, .iteration-demo .process-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 0;
}
.iteration-demo .iteration-analysis-node, .iteration-demo .process-node {
  flex: 1;
  min-width: 0;
  padding: 11px 12px;
  border: 0;
  border-radius: 0;
  background: transparent;
  text-align: center;
}
.iteration-demo .iteration-analysis-flow .iteration-analysis-node + .iteration-analysis-node, .iteration-demo .process-flow .process-node + .process-node { border-left: 1px solid var(--iteration-line); }
.iteration-demo .iteration-process-cards .iteration-analysis-node:nth-child(even), .iteration-demo .process-cards .process-node:nth-child(even) { border-left: 1px solid var(--iteration-line); }
.iteration-demo .iteration-analysis-node.is-highlight, .iteration-demo .process-node.is-highlight { background: transparent; }
.iteration-demo .iteration-analysis-label, .iteration-demo .process-label { display: block; color: var(--iteration-muted); font-size: 16px; font-weight: 500; line-height: 1.45; }
.iteration-demo .iteration-analysis-value, .iteration-demo .process-value { display: block; margin-top: 7px; color: var(--iteration-text); font-size: 33px; font-weight: 500; line-height: 1.15; font-variant-numeric: tabular-nums; }
.iteration-demo .is-highlight .iteration-analysis-value, .iteration-demo .is-highlight .process-value { color: var(--iteration-mint); }
.iteration-demo .iteration-analysis-value.iteration-node-text { font-size: 24px; line-height: 1.3; }
.iteration-demo .iteration-build-count { display: block; color: var(--iteration-mint); text-align: center; font-size: 34px; line-height: 1.2; }
.iteration-demo[data-visual="process"] #iteration-model-label { max-width: calc(100% - 32px); }
.iteration-candidate-comparison { display: grid; gap: 20px; }
.iteration-candidate-row { display: grid; grid-template-columns: 145px minmax(0, 1fr) 55px; align-items: center; gap: 12px; font-size: 16px; }
.iteration-candidate-row > div { height: 8px; border-radius: 8px; background: #e2e6dc; }
.iteration-candidate-row i { display: block; height: 100%; background: #78948a; border-radius: inherit; }
.iteration-candidate-row.is-highlight { color: var(--iteration-mint); }
.iteration-candidate-row.is-highlight i { background: var(--iteration-mint); }
.iteration-analysis-bars { display: grid; gap: 20px; width: 100%; }
.iteration-analysis-bar { display: grid; grid-template-columns: minmax(100px, 1fr) minmax(70px, 1.25fr) auto; gap: 12px; align-items: center; color: var(--iteration-text); font-size: 18px; line-height: 1.45; }
.iteration-analysis-bar > span { overflow-wrap: anywhere; }
.iteration-analysis-bar strong { color: var(--iteration-text); font-size: 21px; font-weight: 600; font-variant-numeric: tabular-nums; }
.iteration-analysis-bar.is-confidence strong { color: var(--iteration-mint); }
.iteration-bar-track { height: 11px; overflow: hidden; border-radius: 8px; background: #e2e6dc; }
.iteration-bar-track > i { display: block; height: 100%; border-radius: inherit; background: var(--iteration-mint); transform-origin: left center; animation: iteration-bar-reveal .6s ease both; }
.iteration-demo .iteration-analysis-operator, .iteration-demo .process-operator { flex: 0 0 auto; color: var(--iteration-mint); font-size: 26px; line-height: 1; }
.iteration-demo .iteration-process-cards, .iteration-demo .process-cards { display: grid; grid-template-columns: repeat(var(--iteration-cards, 2), minmax(0, 1fr)); gap: 14px 0; }
.iteration-demo .iteration-process-body, .iteration-demo .process-body { color: var(--iteration-text); font-size: 18px; line-height: 1.55; }
.iteration-demo .iteration-process-note { color: var(--iteration-muted); font-size: 17px; line-height: 1.55; text-align: center; text-wrap: pretty; }
.iteration-demo .iteration-calculation {
  padding: 12px 0;
  border-block: 1px solid var(--iteration-line);
  border-radius: 0;
  background: transparent;
  color: var(--iteration-mint);
  font: 18px/1.45 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-align: center;
  overflow-wrap: anywhere;
}
.iteration-demo .iteration-flow-line { stroke: var(--iteration-mint); stroke-width: 2; stroke-dasharray: 6 8; }
.iteration-demo.is-playing .iteration-flow-line { animation: iteration-flow-pulse 1.6s linear infinite; }
.iteration-demo #iteration-model-label {
  position: absolute;
  z-index: 2;
  top: 18px;
  left: 18px;
  max-width: calc(100% - 130px);
  color: var(--iteration-muted);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: .6px;
  pointer-events: none;
}
.iteration-demo #iteration-reset {
  position: absolute;
  z-index: 2;
  top: 9px;
  right: 10px;
  min-height: 44px;
  padding: 9px 12px;
  border: 0;
  border-radius: 22px;
  background: rgba(247, 246, 242, .9);
  color: var(--iteration-muted);
  font-size: 16px;
  cursor: pointer;
}
.iteration-demo #iteration-reset:hover:not(:disabled) { background: #e8eee2; color: var(--iteration-text); }
.iteration-demo #iteration-reset:disabled { opacity: .5; cursor: default; }
.iteration-demo #iteration-scene-status {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: grid;
  place-content: center;
  padding: 25px;
  background: rgba(243, 245, 239, .86);
  color: var(--iteration-muted);
  font-size: 16px;
  text-align: center;
  pointer-events: none;
}
.iteration-model-legend { display: flex; flex-wrap: wrap; gap: 17px; margin-top: 12px; }
.iteration-model-legend span, .iteration-chart-legend span { display: inline-flex; align-items: center; gap: 7px; color: var(--iteration-muted); font-size: 16px; }
.iteration-model-legend i { width: 9px; height: 9px; border-radius: 50%; background: var(--iteration-chain-color); }
.iteration-model-caption { margin-top: 7px !important; color: var(--iteration-muted); font-size: 16px; }
.iteration-story-panel { display: flex; flex-direction: column; padding: 2px 0 0; min-height: 440px; }
.iteration-demo #iteration-step-kicker { color: var(--iteration-mint); font-size: 16px; font-weight: 600; letter-spacing: .7px; }
.iteration-demo #iteration-step-title { margin-top: 9px; font-size: clamp(27px, 2.2vw, 31px); font-weight: 600; line-height: 1.3; letter-spacing: -.5px; text-wrap: pretty; }
.iteration-replay-narrative { margin-top: 15px; padding: 0; border: 0; border-radius: 0; background: transparent; }
.iteration-replay-meta { display: none; }
.iteration-demo #iteration-replay-source { min-width: 0; max-width: 100%; color: var(--iteration-muted); overflow-wrap: anywhere; }
.iteration-demo #iteration-replay-status { flex: 0 0 auto; color: var(--iteration-mint); }
.iteration-demo #iteration-replay-text { min-height: 90px; color: var(--iteration-text); font-size: 19px; line-height: 1.65; text-wrap: pretty; overflow-wrap: anywhere; }
.iteration-demo #iteration-replay-text mark { padding: 1px 3px; border-radius: 3px; background: #dcebdd; color: #285740; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.iteration-stream-cursor { display: inline-block; width: 2px; height: 1.05em; margin-left: 4px; vertical-align: -.13em; border-radius: 1px; background: var(--iteration-mint); animation: iteration-cursor-blink .8s steps(1, end) infinite; }
.iteration-demo[data-replay-state="paused"] .iteration-stream-cursor { opacity: .35; animation: none; }
.iteration-demo[data-replay-state="complete"] .iteration-stream-cursor { display: none; }
.iteration-replay-tool { margin-top: 18px; border: 0; border-left: 2px solid #b9c4b4; border-radius: 0 4px 4px 0; background: #eef0e9; overflow: hidden; }
.iteration-replay-terminal-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding: 13px 16px 0; }
.iteration-demo #iteration-replay-tool-name { color: var(--iteration-text); font: 500 16px/1.45 ui-monospace, SFMono-Regular, Menlo, monospace; overflow-wrap: anywhere; }
.iteration-replay-output-label { flex-shrink: 0; color: var(--iteration-muted); font-size: 16px; line-height: 1.5; }
.iteration-demo #iteration-replay-tool-purpose { padding: 6px 16px 0; color: var(--iteration-muted); font-size: 16px; line-height: 1.5; overflow-wrap: anywhere; }
.iteration-demo #iteration-replay-tool-purpose:empty { display: none; }
.iteration-demo #iteration-replay-terminal { max-height: 120px; margin: 12px 0 0; padding: 0 16px 14px; overflow: auto; color: var(--iteration-text); font: 16px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap; overflow-wrap: anywhere; scrollbar-color: #a8b5a6 transparent; scrollbar-width: thin; }
.iteration-demo #iteration-replay-terminal:empty { display: none; }
.iteration-demo #iteration-replay-details { border-top: 1px solid var(--iteration-line); }
.iteration-demo #iteration-replay-details summary { padding: 11px 16px; color: var(--iteration-muted); font-size: 16px; line-height: 1.5; cursor: pointer; }
.iteration-demo #iteration-replay-details summary:hover { color: var(--iteration-mint); background: #eef2e9; }
.iteration-demo #iteration-replay-details summary:focus-visible { outline: 2px solid var(--iteration-mint); outline-offset: -4px; border-radius: 8px; }
.iteration-replay-detail-body { padding: 2px 16px 16px; }
.iteration-replay-detail-body h4 { color: var(--iteration-muted); font-size: 16px; font-weight: 500; line-height: 1.5; }
.iteration-replay-detail-body pre { max-height: 300px; margin: 9px 0 17px; padding: 12px; overflow: auto; border-radius: 4px; background: var(--paper, #f7f6f2); color: var(--iteration-text); font: 16px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre; scrollbar-color: #a8b5a6 transparent; scrollbar-width: thin; }
.iteration-replay-detail-body pre:last-child { margin-bottom: 0; }
.iteration-demo #iteration-memory-panel { margin-top: 20px; padding: 2px 0 2px 17px; border: 0; border-left: 3px solid #a1b7a0; border-radius: 0; background: transparent; }
.iteration-demo #iteration-memory-panel h5 { margin: 0 0 12px; color: var(--iteration-mint); font-size: 16px; font-weight: 600; line-height: 1.4; letter-spacing: .7px; }
.iteration-demo #iteration-memory-panel p { display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: 12px; color: var(--iteration-text); font-size: 18px; line-height: 1.55; }
.iteration-demo #iteration-memory-panel p + p { margin-top: 12px; }
.iteration-demo #iteration-memory-panel p strong { color: var(--iteration-muted); font-size: 16px; font-weight: 600; }
.iteration-demo #iteration-memory-panel p span { overflow-wrap: anywhere; }
.iteration-score-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 20px; padding-top: 15px; border-top: 1px solid var(--iteration-line); }
.iteration-replay-tool:not([hidden]) + .iteration-score-grid { margin-top: 19px; }
.iteration-score-grid > div { min-width: 0; }
.iteration-score-label { display: block; color: var(--iteration-muted); font-size: 16px; line-height: 1.45; }
.iteration-score-value { display: block; margin-top: 6px; font-size: 27px; font-weight: 500; line-height: 1.1; letter-spacing: -.6px; font-variant-numeric: tabular-nums; }
.iteration-demo #iteration-iptm { color: var(--iteration-mint); }
.iteration-demo #iteration-rows { color: var(--iteration-text); }
.iteration-demo #iteration-phases { position: relative; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; margin-bottom: 20px; }
.iteration-demo #iteration-phases::after { content: ""; position: absolute; z-index: 0; left: 6%; right: 6%; bottom: -13px; height: 20px; border: 1px solid #c1d0c0; border-top: 0; border-radius: 0 0 8px 8px; pointer-events: none; }
.iteration-demo #iteration-phases button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-content: center;
  align-items: baseline;
  gap: 7px 9px;
  z-index: 1;
  min-width: 0;
  min-height: 72px;
  position: relative;
  padding: 8px 10px;
  border: 0;
  border-bottom: 1px solid var(--iteration-line);
  border-radius: 0;
  background: transparent;
  color: var(--iteration-muted);
  font-size: 16px;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
  transition: border-color .25s, color .25s, background .25s;
}
.iteration-demo #iteration-phases button:not(:last-child)::after { content: "→"; position: absolute; right: -20px; top: calc(50% - 12px); width: 20px; color: var(--iteration-mint); font-size: 20px; line-height: 24px; text-align: center; pointer-events: none; }
.iteration-method-number { color: var(--iteration-mint); font-size: 16px; font-variant-numeric: tabular-nums; }
.iteration-method-label { color: var(--iteration-text); font-size: 19px; font-weight: 500; line-height: 1.3; }
.iteration-method-purpose { grid-column: 1 / -1; color: var(--iteration-muted); font-size: 16px; line-height: 1.45; }
.iteration-demo #iteration-phases button:hover:not(:disabled):not(.is-active) { color: var(--iteration-text); border-bottom-color: #8ea795; background: #f0f3ec; }
.iteration-demo #iteration-phases button.is-active, .iteration-demo #iteration-phases button[aria-pressed="true"] { color: var(--iteration-mint); border-color: #8ea795; background: #eef2e9; box-shadow: none; }
.iteration-demo #iteration-phases button.is-active .iteration-method-label, .iteration-demo #iteration-phases button[aria-pressed="true"] .iteration-method-label, .iteration-demo #iteration-phases button.is-active .iteration-method-number, .iteration-demo #iteration-phases button[aria-pressed="true"] .iteration-method-number { color: var(--iteration-mint); }
.iteration-demo #iteration-phases button.is-active .iteration-method-purpose, .iteration-demo #iteration-phases button[aria-pressed="true"] .iteration-method-purpose { color: var(--iteration-muted); }
.iteration-demo #iteration-phases button:disabled { cursor: default; }
.iteration-demo #iteration-loop-caption { display: flex; align-items: baseline; justify-content: center; gap: 9px; margin: 0 0 14px; color: var(--iteration-muted); font-size: 16px; line-height: 1.5; text-align: center; text-wrap: pretty; }
.iteration-demo #iteration-loop-caption::before { content: "↶"; color: var(--iteration-mint); font-size: 22px; line-height: 1; }
.iteration-demo #iteration-phases button.is-active::before, .iteration-demo #iteration-phases button[aria-pressed="true"]::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--iteration-mint);
  border-radius: 2px;
}
.iteration-demo.is-playing #iteration-phases button.is-active::before { animation: iteration-phase-glow 2s ease-in-out infinite; }
.iteration-demo-evidence { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(0, 1fr); gap: 32px; align-items: start; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--iteration-line); }
.iteration-demo-evidence.has-main-msa { grid-template-columns: minmax(0, 1fr); }
.iteration-evidence-title { font-size: 18px; font-weight: 600; line-height: 1.5; }
.iteration-demo #iteration-msa-title { color: var(--iteration-text); }
.iteration-demo #iteration-msa-blocks { min-height: 96px; margin-top: 15px; }
.iteration-demo #iteration-msa-blocks svg { display: block; width: 100%; height: auto; max-height: none; overflow: visible; }
.iteration-demo #iteration-msa-blocks svg { animation: iteration-evidence-reveal .5s ease both; }
.iteration-demo .iteration-live-curve { stroke-dasharray: 1; animation: iteration-curve-reveal .8s ease both; }
.iteration-demo #iteration-msa-caption { margin-top: 9px; color: var(--iteration-muted); font-size: 16px; line-height: 1.5; }
.iteration-chart-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 9px 16px; }
.iteration-chart-legend { display: flex; flex-wrap: wrap; gap: 14px; }
.iteration-chart-legend span { font-size: 16px; }
.iteration-chart-legend i { width: 16px; height: 2px; background: var(--iteration-series-color); border-radius: 1px; }
.iteration-demo #iteration-trajectory { margin-top: 11px; height: 154px; min-height: 154px; }
.iteration-demo #iteration-trajectory svg { display: block; width: 100%; height: 100%; overflow: visible; }
.iteration-demo #iteration-trajectory text, .iteration-demo #iteration-msa-blocks text { font-family: var(--sans, Arial, sans-serif); }
.iteration-demo #iteration-trajectory .iteration-trajectory-grid { stroke: rgba(36, 52, 46, .12); stroke-width: 1; }
.iteration-demo #iteration-trajectory .iteration-trajectory-line { fill: none; stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.iteration-demo #iteration-trajectory .iteration-trajectory-point { stroke: #f7f6f2; stroke-width: 2; }
.iteration-demo #iteration-trajectory .iteration-trajectory-point.is-active { stroke: var(--iteration-text); stroke-width: 2.5; }
.iteration-demo #iteration-trajectory .iteration-trajectory-current { stroke: rgba(36, 52, 46, .38); stroke-width: 1; stroke-dasharray: 3 4; }
.iteration-demo-footer { margin-top: 20px; padding-top: 0; border-top: 0; }
.iteration-demo-playback { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); align-items: start; gap: 12px 28px; margin-bottom: 20px; }
.iteration-demo-playback .iteration-controls { margin-top: 0; align-items: flex-start; }
.iteration-demo .iteration-demo-playback #iteration-timeline { margin-top: 0; }
.iteration-demo .iteration-demo-playback #iteration-timeline button { min-height: 44px; }
.iteration-demo-playback .iteration-progress { grid-column: 1 / -1; height: 2px; }
.iteration-demo .iteration-demo-playback #iteration-trace-progress { flex-basis: 100%; margin: 2px 0 0; }
.iteration-progress { position: relative; height: 3px; overflow: hidden; border-radius: 3px; background: #e1e6db; }
.iteration-progress i { display: block; width: var(--iteration-progress, 0%); height: 100%; background: var(--iteration-mint); border-radius: inherit; transition: width .6s ease; }
.iteration-controls { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 19px; }
.iteration-transport { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.iteration-demo #iteration-trace-progress { margin-left: 7px; color: var(--iteration-muted); font-size: 16px; line-height: 1.5; font-variant-numeric: tabular-nums; }
.iteration-controls button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 44px;
  min-height: 44px;
  padding: 9px 14px;
  border: 1px solid var(--iteration-line);
  border-radius: 24px;
  background: transparent;
  color: var(--iteration-text);
  font-size: 16px;
  line-height: 1.4;
  cursor: pointer;
  transition: background .2s, border-color .2s;
}
.iteration-controls button:hover:not(:disabled) { background: #eef2e9; border-color: #9bb3a1; }
.iteration-controls button:disabled { color: #849088; border-color: #dee3d8; cursor: default; }
.iteration-demo #iteration-play { min-width: 118px; color: #fff; background: var(--iteration-mint); border-color: var(--iteration-mint); font-weight: 600; }
.iteration-demo #iteration-play:hover:not(:disabled) { background: #264b3b; border-color: #264b3b; }
.iteration-demo #iteration-play:disabled { opacity: .5; cursor: default; }
.iteration-demo #iteration-replay { border-color: transparent; color: var(--iteration-muted); }
.iteration-demo #iteration-timeline { display: grid; grid-template-columns: repeat(var(--iteration-steps, 7), minmax(0, 1fr)); gap: 8px; margin-top: 18px; }
.iteration-demo #iteration-timeline button {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1px;
  min-width: 0;
  min-height: 56px;
  padding: 8px 4px;
  border: 1px solid var(--iteration-line);
  border-radius: 9px;
  background: var(--iteration-card);
  color: var(--iteration-muted);
  font-size: 16px;
  line-height: 1.45;
  cursor: pointer;
  transition: border-color .25s, color .25s, background .25s;
}
.iteration-demo #iteration-timeline button:hover { border-color: #68937b; color: var(--iteration-text); }
.iteration-demo #iteration-timeline button.is-complete { border-color: #c1d0c0; color: var(--iteration-mint); }
.iteration-demo #iteration-timeline button.is-active, .iteration-demo #iteration-timeline button[aria-current="step"], .iteration-demo #iteration-timeline button[aria-pressed="true"] { background: #eef2e9; border-color: var(--iteration-mint); color: var(--iteration-text); }
.iteration-demo #iteration-timeline button span { font-size: 16px; }
.iteration-demo #iteration-timeline button:last-child { border-color: #c1d0c0; color: var(--iteration-mint); }
.iteration-demo #iteration-timeline button:last-child.is-active, .iteration-demo #iteration-timeline button:last-child[aria-pressed="true"] { background: #eef2e9; border-color: var(--iteration-mint); }
.iteration-demo #iteration-footnote { margin-top: 17px; color: var(--iteration-muted); font-size: 16px; line-height: 1.6; }
.iteration-demo.is-switching #iteration-structure, .iteration-demo #iteration-structure.is-switching, .iteration-demo .iteration-structure-stage.is-switching #iteration-structure { animation: iteration-model-reveal .5s ease both; }
@keyframes iteration-model-reveal { from { opacity: .25; filter: blur(3px); } to { opacity: 1; filter: blur(0); } }
@keyframes iteration-evidence-reveal { from { opacity: .3; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
@keyframes iteration-curve-reveal { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
@keyframes iteration-phase-glow { 0%, 100% { opacity: .45; } 50% { opacity: 1; } }
@keyframes iteration-flow-pulse { from { stroke-dashoffset: 28; } to { stroke-dashoffset: 0; } }
@keyframes iteration-cursor-blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@keyframes iteration-bar-reveal { from { transform: scaleX(.04); } to { transform: scaleX(1); } }
@media (max-width: 1200px) {
  .iteration-demo-playback { grid-template-columns: minmax(0, 1fr); gap: 12px; }
}
@media (max-width: 1050px) {
  .iteration-demo { padding: 26px; }
  .iteration-case-scores { font-size: 18px; gap: 5px; }
  .iteration-demo #iteration-case-options button { display: flex; flex-direction: column; align-items: flex-start; padding: 10px 12px; }
  .iteration-demo #iteration-phases { gap: 16px; }
  .iteration-demo #iteration-phases button { padding: 8px 10px; }
  .iteration-demo #iteration-phases button:not(:last-child)::after { right: -16px; width: 16px; }
  .iteration-demo-main, .iteration-demo-evidence { gap: 24px; }
  .iteration-structure-stage { height: 440px; }
  .iteration-demo-header { gap: 20px; }
  .iteration-demo #iteration-title { font-size: 32px; }
  .iteration-score-grid { gap: 14px; }
  .iteration-score-value { font-size: 27px; }
  .iteration-replay-terminal-head { flex-wrap: wrap; gap: 3px 10px; }
  .iteration-demo #iteration-replay-text { font-size: 19px; }
}
@media (max-width: 800px) {
  .iteration-demo { margin-top: 30px; }
  .iteration-demo #iteration-case-options { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .iteration-demo-main, .iteration-demo-evidence { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .iteration-demo-header { display: block; }
  .iteration-demo #iteration-case-link { margin-top: 15px; }
  .iteration-structure-stage { height: 440px; }
  .iteration-story-panel { padding: 0; min-height: 0; }
  .iteration-demo #iteration-replay-text { font-size: 18px; }
  .iteration-score-grid { margin-top: 20px; }
  .iteration-demo #iteration-phases { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 20px; margin-bottom: 24px; }
  .iteration-demo #iteration-phases button:nth-child(2)::after { content: "↓"; right: 12px; top: auto; bottom: -21px; width: 20px; }
  .iteration-demo #iteration-phases button:nth-child(3) { grid-column: 2; grid-row: 2; }
  .iteration-demo #iteration-phases button:nth-child(3)::after { content: "←"; right: auto; left: -20px; width: 20px; }
  .iteration-demo #iteration-phases button:nth-child(4) { grid-column: 1; grid-row: 2; }
  .iteration-demo #iteration-phases::after { left: -7px; right: auto; top: 28px; bottom: 28px; width: 12px; height: auto; border: 1px solid #c1d0c0; border-right: 0; border-radius: 8px 0 0 8px; }
  .iteration-demo-evidence { margin-top: 24px; padding-top: 20px; }
  .iteration-trajectory-panel { padding-top: 20px; border-top: 1px solid var(--iteration-line); }
  .iteration-demo #iteration-trajectory { height: 175px; }
}
@media (max-width: 520px) {
  .iteration-demo { padding: 18px 10px; border-radius: 12px; }
  .iteration-demo-header { margin-bottom: 16px; }
  .iteration-demo #iteration-title { font-size: 30px; line-height: 1.24; letter-spacing: -.6px; }
  .iteration-demo-eyebrow { font-size: 14px; letter-spacing: 1px; }
  .iteration-demo-target { font-size: 16px; }
  .iteration-structure-stage { height: 420px; border-radius: 8px; }
  .iteration-demo #iteration-process-visual { gap: 18px; padding: 49px 12px 20px; }
  .iteration-demo[data-visual="process"] .iteration-structure-stage { height: auto; }
  .iteration-demo[data-visual="process"] #iteration-process-visual { position: relative; inset: auto; min-height: 380px; }
  .iteration-demo .iteration-analysis-flow, .iteration-demo .process-flow { flex-direction: column; gap: 9px; }
  .iteration-demo .iteration-analysis-node, .iteration-demo .process-node { flex: 0 0 auto; width: 100%; padding: 8px 9px; }
  .iteration-demo .iteration-analysis-label, .iteration-demo .process-label { font-size: 16px; }
  .iteration-demo .iteration-analysis-value, .iteration-demo .process-value { margin-top: 4px; font-size: 27px; }
  .iteration-demo .iteration-analysis-flow > .iteration-analysis-operator, .iteration-demo .process-flow > .process-operator { transform: rotate(90deg); font-size: 23px; }
  .iteration-demo[data-phase="1"] .iteration-analysis-flow { flex-direction: row; }
  .iteration-demo[data-phase="1"] .iteration-analysis-flow .iteration-analysis-node { flex: 1; width: auto; }
  .iteration-demo[data-phase="1"] .iteration-analysis-flow > .iteration-analysis-operator { transform: none; }
  .iteration-candidate-row { grid-template-columns: 1fr 55px; gap: 5px 10px; }
  .iteration-candidate-row > div { grid-column: 1; grid-row: auto; }
  .iteration-candidate-row strong { grid-column: 2; grid-row: span 2; align-self: center; }
  .iteration-demo .iteration-process-cards, .iteration-demo .process-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 0; }
  .iteration-demo .iteration-process-heading { font-size: 22px; }
  .iteration-demo .iteration-process-note { font-size: 17px; }
  .iteration-analysis-bar { font-size: 17px; grid-template-columns: minmax(90px, 1fr) minmax(60px, 1.15fr) auto; gap: 9px; }
  .iteration-analysis-bar strong { font-size: 20px; }
  .iteration-demo .iteration-calculation { font-size: 17px; padding: 13px 10px; }
  .iteration-demo #iteration-model-label { top: 15px; left: 12px; max-width: calc(100% - 110px); font-size: 16px; line-height: 1.4; }
  .iteration-demo #iteration-reset { right: 4px; font-size: 16px; padding: 9px 10px; }
  .iteration-model-legend { gap: 17px; }
  .iteration-model-legend span { font-size: 16px; }
  .iteration-model-caption { font-size: 16px; }
  .iteration-demo #iteration-step-title { font-size: 27px; }
  .iteration-demo-intro { font-size: 18px; }
  .iteration-replay-narrative { padding: 0; }
  .iteration-demo #iteration-replay-text { min-height: 90px; font-size: 18px; }
  .iteration-replay-terminal-head { padding: 12px 14px 0; }
  .iteration-demo #iteration-replay-tool-purpose { padding-right: 14px; padding-left: 14px; }
  .iteration-demo #iteration-replay-terminal { max-height: 120px; padding-right: 14px; padding-left: 14px; }
  .iteration-demo #iteration-replay-details summary { padding: 10px 14px; }
  .iteration-replay-detail-body { padding-right: 14px; padding-left: 14px; }
  .iteration-score-label { font-size: 16px; }
  .iteration-score-value { font-size: 27px; }
  .iteration-demo #iteration-case-options { gap: 10px; }
  .iteration-demo #iteration-case-options button { display: flex; flex-direction: column; align-items: flex-start; padding: 11px 12px; }
  .iteration-case-scores { font-size: 18px; gap: 5px; }
  .iteration-demo #iteration-phases { gap: 14px 18px; }
  .iteration-demo #iteration-phases button { grid-template-columns: minmax(0, 1fr); min-height: 118px; padding: 10px; gap: 5px; }
  .iteration-method-label { font-size: 18px; }
  .iteration-method-purpose { font-size: 16px; }
  .iteration-demo #iteration-phases button:nth-child(1)::after { right: -18px; width: 18px; }
  .iteration-demo #iteration-phases button:nth-child(3)::after { left: -18px; width: 18px; }
  .iteration-demo #iteration-loop-caption { text-align: left; font-size: 16px; }
  .iteration-demo #iteration-memory-panel { padding: 2px 0 2px 12px; }
  .iteration-demo #iteration-memory-panel p { grid-template-columns: minmax(0, 1fr); gap: 3px; }
  .iteration-controls { gap: 8px; align-items: flex-start; flex-wrap: wrap; }
  .iteration-transport { gap: 6px; }
  .iteration-controls button { padding: 9px 11px; }
  .iteration-demo #iteration-play { min-width: 91px; }
  .iteration-demo #iteration-replay { margin-left: auto; padding: 9px 5px; }
  .iteration-demo #iteration-trace-progress { flex-basis: 100%; margin: 4px 0 0; }
  .iteration-demo #iteration-timeline { gap: 5px; }
  .iteration-demo #iteration-timeline button { min-height: 50px; padding: 7px 2px; font-size: 16px; }
  .iteration-demo #iteration-timeline button span { font-size: 16px; }
  .iteration-demo #iteration-msa-blocks { min-height: 74px; }
  .iteration-demo #iteration-msa-blocks text { font-size: 16px; }
  .iteration-demo #iteration-footnote { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  .iteration-demo *, .iteration-demo *::before, .iteration-demo *::after { animation: none !important; transition: none !important; }
}

/* Show the next construction as an explicit, single-variable comparison. */
.iteration-change-header, .iteration-change-row { display: grid; grid-template-columns: minmax(0, 1fr) 55px 22px 55px 55px; align-items: center; gap: 10px; }
.iteration-change-header { padding: 0 12px 0 15px; color: var(--iteration-muted); font-size: 16px; line-height: 1.25; text-align: center; }
.iteration-change-header > span:first-child { grid-column: 2; }
.iteration-change-header > span:last-child { grid-column: 4; }
.iteration-change-list { display: grid; gap: 7px; }
.iteration-change-row { padding: 10px 12px; border-left: 3px solid transparent; border-bottom: 1px solid #e1e6dc; color: var(--iteration-text); }
.iteration-change-label { min-width: 0; font-size: 18px; font-weight: 500; line-height: 1.4; overflow-wrap: anywhere; }
.iteration-change-before, .iteration-change-after { text-align: center; font-size: 22px; font-weight: 600; line-height: 1.2; font-variant-numeric: tabular-nums; }
.iteration-change-arrow { color: var(--iteration-muted); font-size: 18px; text-align: center; }
.iteration-change-state { color: var(--iteration-muted); font-size: 16px; line-height: 1.35; }
.iteration-change-row.is-changed { border-left-color: #6e957b; background: #edf3e9; }
.iteration-change-row.is-changed .iteration-change-after, .iteration-change-row.is-changed .iteration-change-state { color: var(--iteration-mint); }
.iteration-change-row.is-changed .iteration-change-state { font-weight: 600; }
@media (max-width: 520px) {
  .iteration-change-header, .iteration-change-row { grid-template-columns: minmax(0, 1fr) 52px 16px 52px; column-gap: 8px; }
  .iteration-change-header { padding-right: 9px; padding-left: 12px; }
  .iteration-change-row { padding: 9px; row-gap: 3px; }
  .iteration-change-label { grid-column: 1; grid-row: 1; font-size: 16px; }
  .iteration-change-before { grid-column: 2; grid-row: 1 / span 2; }
  .iteration-change-arrow { grid-column: 3; grid-row: 1 / span 2; }
  .iteration-change-after { grid-column: 4; grid-row: 1 / span 2; }
  .iteration-change-state { grid-column: 1; grid-row: 2; }
}