/* Duel mode. Reuses the study-lab palette; no new colour tokens. */
.neuro-duel{max-width:1320px;margin:auto;padding:25px 0 55px;color:var(--ink)}
.duel-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:28px;font-size:12px;color:var(--muted)}
.duel-heading .eyebrow{letter-spacing:.18em;font-weight:800}
.neuro-duel button,.neuro-duel a.secondary{min-height:44px}
.neuro-duel button:focus-visible,.neuro-duel a:focus-visible,.neuro-duel select:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
/* neuro-sprint.css scopes .sr-only to .neuro-sprint, so the duel needs its own. */
.neuro-duel .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.neuro-duel kbd{display:inline-block;min-width:18px;padding:1px 5px;margin-right:7px;border:1px solid var(--line);border-radius:5px;background:var(--soft);font:inherit;font-size:11px;font-weight:700;color:var(--muted)}

/* Setup */
.duel-intro{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;align-items:center;padding:45px 0}
.duel-kicker{font-size:11px;letter-spacing:.18em;font-weight:800;color:var(--coral)}
.duel-intro h1{font-size:clamp(48px,6vw,84px);line-height:1.02;letter-spacing:-.045em;margin:20px 0}
.duel-intro em{color:var(--coral);font-weight:400}
.duel-intro .lead{font-size:16px;line-height:1.6}
.duel-rules{border:1px solid var(--line);border-radius:24px;background:var(--white);padding:30px}
.duel-rules ol{margin:0;padding-left:22px}.duel-rules li{padding:0 0 22px 10px;line-height:1.6}.duel-rules li:last-child{padding-bottom:0}
.duel-launch{display:flex;align-items:end;flex-wrap:wrap;gap:24px;padding:24px;background:var(--soft);border-radius:18px}
.duel-launch label{display:grid;gap:8px;font-size:13px}
.duel-launch select{padding:11px 13px;border:1px solid var(--line);border-radius:10px;background:var(--white);color:inherit}
.duel-personal{display:flex;gap:35px;align-items:center;flex-wrap:wrap;padding:28px 0;color:var(--muted);font-size:13px}
.duel-personal b{font-size:24px;color:var(--ink);margin-right:7px}
.duel-disclosure{font-size:11px;line-height:1.7;color:var(--muted);border-top:1px solid var(--line);padding-top:18px;margin-top:10px}

/* Ring */
.duel-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:24px;align-items:start}
.duel-stage-col{min-width:0}
.duel-stage{height:460px;position:relative;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--white)}
.duel-stage-badge{position:absolute;top:14px;left:14px;z-index:2;font-size:10px;letter-spacing:.16em;font-weight:800;color:var(--muted)}
.duel-stage-badge span{color:var(--coral)}
.duel-view-controls{position:absolute;top:10px;right:10px;z-index:2;display:flex;gap:6px}
.duel-view-controls button{padding:7px 12px;font-size:12px;border:1px solid var(--line);border-radius:9px;background:#fffefaee;color:inherit}
.duel-scene-message{position:absolute;inset:0;z-index:3;pointer-events:none;display:grid;align-content:center;justify-items:center;gap:8px;text-align:center;padding:24px;background:#f4f3edf2}
.duel-scene-message[hidden]{display:none}
.duel-scene-message b{font-size:19px}.duel-scene-message span{font-size:13px;color:var(--muted);max-width:34ch}
/* The teaching panels are sized for the exam room's stage and swamp the duel's.
   The coloured region overlay on the model stays: that is the review payoff. */
.neuro-duel .anatomy-labels,.neuro-duel .anatomy-label,.neuro-duel .head-scene-labels,
.neuro-duel .placing-timer,.neuro-duel .anatomy-number-key,.neuro-duel .anatomy-region-labels{display:none}

.duel-tell{margin-top:16px;padding:22px 24px;border:1px solid var(--line);border-left:5px solid var(--line);border-radius:14px;background:var(--white);min-height:112px;transition:border-left-color .2s ease}
.duel-tell h2{font-size:25px;line-height:1.25;margin:8px 0 0;letter-spacing:-.02em}
.duel-tell .small{color:var(--muted);font-size:12px;margin-top:10px}
.duel-tell[data-stage=windup]{border-left-color:var(--gold)}
.duel-tell[data-stage=window]{border-left-color:var(--coral)}
.duel-tell[data-stage=resolved],.duel-tell[data-stage=recovery]{border-left-color:var(--green)}
.duel-reveal{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);font-size:14px;line-height:1.6}

.duel-meter{height:8px;margin-top:10px;border-radius:99px;background:var(--soft);overflow:hidden}
.duel-meter span{display:block;height:100%;width:0;border-radius:99px;background:var(--muted)}
.duel-meter[data-stage=windup] span{background:var(--gold)}
.duel-meter[data-stage=window] span{background:var(--coral)}

/* Panel */
.duel-panel{min-width:0;scroll-margin-top:20px;display:grid;gap:18px}
.duel-card{background:var(--white);border:1px solid var(--line);border-radius:24px;padding:30px;line-height:1.7}
.duel-card h2{font-size:27px;margin:8px 0 14px;letter-spacing:-.02em}
.duel-card .small{font-size:12px;color:var(--muted);line-height:2.1}
.duel-card button{margin-top:18px}
.duel-hud{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:0 4px}
.duel-hud strong{display:block;font-size:44px;line-height:1;letter-spacing:-.03em}
.duel-hud-tells{text-align:right}.duel-hud-tells strong{font-size:22px;color:var(--muted)}
.duel-moves .eyebrow{display:block;margin-bottom:9px;color:var(--muted)}
.duel-probe-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.duel-call-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.duel-moves button{display:flex;align-items:center;justify-content:flex-start;padding:12px 13px;font-size:13px;text-align:left;border:1px solid var(--line);border-radius:12px;background:var(--white);color:inherit}
.duel-moves button:hover:not(:disabled){border-color:var(--green)}
.duel-moves button:disabled{opacity:.45;cursor:default}
.duel-commit button{background:var(--soft);font-weight:700}
.duel-commit button:hover:not(:disabled){border-color:var(--coral)}
.duel-commit .eyebrow{color:var(--coral)}
.duel-log{display:grid;gap:8px;max-height:270px;overflow:auto}
.duel-log .small{color:var(--muted);font-size:12px}
.duel-log-row{padding:11px 13px;border:1px solid var(--line);border-left:4px solid var(--line);border-radius:10px;background:var(--white);font-size:13px}
.duel-log-row span{display:block;margin-top:3px;font-size:11px;color:var(--muted)}
.duel-log-row p{margin:8px 0 0;font-size:12px;line-height:1.6;color:var(--muted)}
.duel-log-row.hit{border-left-color:var(--green)}
.duel-log-row.wrong,.duel-log-row.early{border-left-color:var(--coral)}
.duel-log-row.miss{border-left-color:var(--gold)}

/* Review */
.duel-score-card{background:var(--white);border:1px solid var(--line);border-radius:24px;padding:30px;line-height:1.7}
.duel-score-card strong{display:block;font-size:62px;line-height:1;letter-spacing:-.04em;margin:6px 0 10px}
.duel-score-card strong small{font-size:13px;letter-spacing:0;color:var(--muted);margin-left:9px}
.duel-score-card .small{font-size:12px;color:var(--muted)}
.duel-score-card .eyebrow{color:var(--muted)}
.duel-score-card.correct{border-color:var(--green)}
.duel-score-card.correct .eyebrow{color:var(--green)}
.duel-score-card.incorrect,.duel-score-card.early{border-color:var(--coral)}
.duel-score-card.incorrect .eyebrow,.duel-score-card.early .eyebrow{color:var(--coral)}
.duel-score-card button{margin:18px 10px 0 0}
.duel-debrief{background:var(--soft);border-radius:20px;padding:26px;line-height:1.7}
.duel-debrief h2{font-size:21px;margin:0 0 12px}
.duel-caution{border-left:3px solid var(--gold);padding-left:14px;font-size:14px}
.duel-debrief .small{font-size:12px;color:var(--muted)}

.duel-held .duel-stage{filter:saturate(.35)}

@media(max-width:1000px){.duel-layout{grid-template-columns:minmax(0,1fr)}.duel-stage{height:360px}.duel-intro{grid-template-columns:1fr;gap:32px;padding:30px 0}}
@media(max-width:650px){.duel-probe-grid,.duel-call-grid{grid-template-columns:1fr}.duel-stage{height:300px}.duel-tell h2{font-size:21px}}