/* One inspectable rule, with a complete static default and no motion. */
.builder-hero { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(230px, 1fr); gap: 72px; align-items: center; padding-top: 54px; padding-bottom: 56px; }
.builder h1 { font: 400 clamp(40px, 5vw, 64px)/1.08 Georgia, 'Times New Roman', serif; letter-spacing: -.035em; margin: 0 0 24px; }
.builder h1 em { color: var(--journey-accent); font-style: normal; }
.builder-hero > div > p:not(.section-kicker) { font-size: 17px; line-height: 1.7; color: var(--journey-muted); margin: 0 0 18px; max-width: 590px; }
.builder-hero > div > p.builder-lead { color: var(--journey-ink); font-size: 19px; }
.builder-hero .journey-button { margin-top: 8px; }
.builder-contract { border-left: 1px solid #b9c7c6; padding: 20px 0 20px 32px; }
.builder-contract ol { margin: 0 0 24px; padding: 0; list-style: none; display: grid; gap: 20px; }
.builder-contract li { display: grid; gap: 5px; }
.builder-contract strong { font-size: 17px; line-height: 1.4; }
.builder-contract span { font-size: 14px; line-height: 1.6; color: var(--journey-muted); }
.builder-sections { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 24px; padding-top: 12px; padding-bottom: 12px; border-top: 1px solid var(--journey-line); font-size: 13px; }
.builder-sections > span { color: var(--journey-muted); }
.builder-sections a { display: inline-flex; align-items: center; min-height: 44px; color: var(--journey-accent); text-decoration: underline; text-underline-offset: 3px; }
.builder-inspect { background: #e9efec; border-block: 1px solid var(--journey-line); padding: 48px 0 52px; scroll-margin-top: 24px; }
.builder-section-intro { max-width: 720px; margin-bottom: 28px; }
.builder-section-intro > p:not(.section-kicker) { font-size: 16px; line-height: 1.7; color: var(--journey-muted); margin: 0; }
.rule-controls { margin-bottom: 20px; }
.rule-controls[hidden], [data-rule-static][hidden] { display: none; }
.rule-controls fieldset { min-width: 0; border: 0; padding: 0; margin: 0; }
.rule-controls legend { font-weight: 600; font-size: 16px; line-height: 1.5; }
#rule-choice-help { max-width: 800px; color: var(--journey-muted); font-size: 14px; line-height: 1.7; margin: 8px 0 16px; }
.rule-options { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.rule-options label { display: flex; gap: 9px; align-items: center; border: 1px solid #afbeb9; border-radius: 6px; background: #fff; padding: 13px 15px; min-height: 48px; font-size: 14px; line-height: 1.5; cursor: pointer; }
.rule-options input { flex: 0 0 16px; width: 16px; height: 16px; margin: 0; accent-color: #163aab; }
.rule-options label:has(input:checked) { background: var(--journey-accent); border-color: var(--journey-accent); color: #fff; }
.rule-options label:focus-within { outline: 3px solid #173990; outline-offset: 3px; }
.rule-options input:focus-visible { outline: none; }
.rule-reset { border: 0; background: none; color: #294b68; font: 13px/1.5 var(--font-body); text-decoration: underline; text-underline-offset: 3px; padding: 12px 0; min-height: 44px; margin-top: 6px; cursor: pointer; }
.rule-status { color: #294b68; border-left: 3px solid var(--journey-accent); padding: 9px 14px; background: #f5f7ff; font-size: 14px; line-height: 1.65; margin: 0 0 24px; }
.rule-static-note { border-left: 3px solid var(--journey-accent); padding: 10px 16px; font-size: 14px; line-height: 1.7; color: var(--journey-muted); }
.rule-workbench { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.35fr); gap: 20px; align-items: start; }
.rule-explanation { display: contents; gap: 18px; }
.rule-explanation > section, .rule-output { min-width: 0; padding: 24px; background: #fff; border: 1px solid #cbd5d1; border-radius: 8px; }
.rule-workbench .section-kicker { font-size: 10px; margin-bottom: 10px; }
.rule-workbench h3 { font: 400 26px/1.25 Georgia, 'Times New Roman', serif; letter-spacing: -.02em; margin: 0 0 14px; }
.rule-explanation p:not(.section-kicker), .rule-output-note { font-size: 15px; line-height: 1.7; color: var(--journey-muted); margin: 0 0 14px; }
.rule-explanation p.rule-boundary { font-size: 12px; border-top: 1px solid var(--journey-line); padding-top: 12px; margin-bottom: 0; }
.rule-explanation p.rule-decision { font-weight: 600; color: var(--journey-ink); }
.rule-explanation [data-rule-reason] { margin-bottom: 0; }
.rule-output ol { counter-reset: block; padding: 0; margin: 20px 0 0; list-style: none; display: grid; gap: 10px; }
.rule-output li { position: relative; counter-increment: block; border: 1px solid #dce4df; border-radius: 5px; padding: 14px 40px 14px 15px; background: #fafbf9; }
.rule-output li:first-child { background: #eaf0ff; border-color: #8fa7e7; }
.rule-output li::before { content: counter(block); position: absolute; top: 13px; right: 14px; font: 12px/1.6 var(--font-mono); color: #52636b; }
.rule-card-label { font-size: 10px; line-height: 1.6; text-transform: uppercase; letter-spacing: .05em; color: var(--journey-muted); }
.rule-output h4 { font-size: 15px; line-height: 1.4; margin: 6px 0 7px; }
.rule-output li p { font-size: 12px; line-height: 1.7; color: var(--journey-muted); margin: 0; }
.rule-constant { font-size: 13px; line-height: 1.7; color: var(--journey-muted); margin: 22px 0 26px; max-width: 850px; }
.rule-constant strong { color: var(--journey-ink); }
.builder-detail { border-top: 1px solid #bccac5; }
.builder-detail:last-child { border-bottom: 1px solid #bccac5; }
.builder-detail > summary { padding: 18px 0; font-size: 15px; line-height: 1.6; font-weight: 600; cursor: pointer; list-style-position: inside; }
.builder-detail > summary:focus-visible { outline: 3px solid var(--journey-accent); outline-offset: 3px; }
.rule-reference { margin: 0 0 22px; display: grid; gap: 16px; }
.rule-reference > div { padding: 15px 18px; background: #f7f9f7; border-left: 2px solid #8fa999; }
.rule-reference dt { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.rule-reference dd { margin: 0; font-size: 14px; line-height: 1.7; }
.rule-reference dd span { color: var(--journey-muted); }
.builder-detail-body { padding-bottom: 22px; max-width: 900px; }
.builder-detail-body p { color: var(--journey-muted); font-size: 14px; line-height: 1.8; }
.builder pre { background: #192b32; color: #edf4ee; border-radius: 6px; padding: 20px; font: 12px/1.8 var(--font-mono); white-space: pre-wrap; overflow-wrap: anywhere; }
.builder code { font-family: var(--font-mono); }
.builder-sequence, .builder-checks { padding-top: 52px; padding-bottom: 56px; }
.build-steps { list-style: none; padding: 0; margin: 32px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 32px 40px; }
.build-steps > li { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 14px; border-top: 2px solid #b6c9c0; padding-top: 20px; }
.build-step-number { font: 12px/1.8 var(--font-mono); color: var(--journey-accent); }
.build-steps h3 { font-size: 19px; line-height: 1.4; margin: 0 0 12px; }
.build-steps p { font-size: 15px; line-height: 1.8; color: var(--journey-muted); margin: 0 0 12px; }
.build-steps .build-step-check { font-size: 13px; line-height: 1.7; border-left: 2px solid #c6d3cc; padding-left: 12px; margin-bottom: 0; }
.builder-guardrails { background: #fff; border-block: 1px solid var(--journey-line); padding: 48px 0; }
.builder-boundaries { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; }
.builder-boundaries > section { border-top: 2px solid var(--journey-accent); padding-top: 20px; min-width: 0; }
.builder-boundaries h3 { font-size: 20px; line-height: 1.45; margin: 0 0 20px; }
.builder-boundaries dl { margin: 0; }
.builder-boundaries dl > div { margin: 0 0 18px; }
.builder-boundaries dt { font-size: 15px; line-height: 1.6; font-weight: 600; margin-bottom: 6px; }
.builder-boundaries dd, .builder-boundaries p { font-size: 15px; line-height: 1.8; color: var(--journey-muted); margin: 0 0 16px; }
.build-checklist { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 32px; list-style: none; padding: 0; margin: 30px 0 0; }
.build-checklist > li { padding: 18px 0 0; border-top: 1px solid #bfcec6; display: grid; gap: 8px; }
.build-checklist strong { font-size: 16px; line-height: 1.5; }
.build-checklist span { font-size: 14px; line-height: 1.8; color: var(--journey-muted); }
.builder-brief { background: #e9efec; border-top: 1px solid var(--journey-line); padding: 48px 0 56px; }
.build-brief { margin: 28px 0 36px; border-top: 1px solid #b6c9c0; }
.build-brief > div { display: grid; grid-template-columns: minmax(140px, 1fr) minmax(0, 3fr); gap: 28px; padding: 18px 0; border-bottom: 1px solid #bfcec6; }
.build-brief dt { font-size: 14px; font-weight: 600; line-height: 1.7; }
.build-brief dd { font-size: 15px; line-height: 1.75; color: var(--journey-muted); margin: 0; }
.builder-next { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.builder-next a { display: grid; align-content: start; gap: 8px; border-top: 2px solid var(--journey-accent); padding: 18px 0 0; text-decoration: none; }
.builder-next strong { font-size: 16px; line-height: 1.5; color: var(--journey-accent); }
.builder-next a:hover strong { text-decoration: underline; text-underline-offset: 3px; }
.builder-next span { font-size: 14px; line-height: 1.7; color: var(--journey-muted); }
@media (max-width: 850px) {
  .builder-hero { gap: 32px; }
  .builder-contract { padding-left: 24px; }
  .rule-options { grid-template-columns: 1fr 1fr; }
  .rule-workbench { grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr); }
  .rule-explanation { display: grid; }
}
@media (max-width: 600px) {
  .builder-hero { display: block; padding-top: 34px; padding-bottom: 36px; }
  .builder h1 { font-size: 43px; }
  .builder-hero > div > p:not(.section-kicker) { font-size: 16px; }
  .builder-contract { border-left: 0; border-top: 1px solid #b9c7c6; padding: 24px 0 0; margin-top: 28px; }
  .builder-contract ol { gap: 14px; }
  .builder-inspect { padding: 36px 0; }
  .rule-options { grid-template-columns: 1fr; gap: 8px; }
  .rule-options label { padding: 11px 14px; }
  .rule-workbench { grid-template-columns: 1fr; gap: 18px; }
  .rule-explanation > section, .rule-output { padding: 20px; }
  .rule-workbench h3 { font-size: 24px; }
  .rule-output li p { font-size: 13px; }
  .builder pre { padding: 16px; font-size: 11px; }
  .builder-sequence, .builder-checks { padding-top: 36px; padding-bottom: 40px; }
  .build-steps, .build-checklist, .builder-boundaries, .builder-next { grid-template-columns: 1fr; gap: 24px; }
  .build-steps > li { grid-template-columns: 24px minmax(0, 1fr); gap: 10px; }
  .builder-guardrails, .builder-brief { padding: 36px 0 40px; }
  .build-brief > div { grid-template-columns: 1fr; gap: 6px; }
}