/* Shared sister-site style.css is copied at build time; this file adds play UI. */
:root{--accent:#557b80;--play-border:#c1cdcb;--play-tint:#eaf0ee;--play-good:#265940;--play-bad:#7e3e38}
html{scroll-padding-top:1rem}body{overflow-wrap:anywhere}main>*{min-width:0}.skip-link{position:absolute;top:-100px;left:1rem;background:#fff;padding:.7rem;z-index:10}.skip-link:focus{top:1rem}.game-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.1rem}.game-card{display:block;background:#fff;border-top:3px solid var(--accent);padding:1.5rem;text-decoration:none}.game-card:hover h2,.game-card:hover h3{text-decoration:underline}.game-card h2,.game-card h3{font-size:1.2rem;line-height:1.7}.game-card p{font-size:.9rem;color:var(--muted)}.category-label{font-size:.8rem;color:var(--accent)}.game-basis{border-left:3px solid var(--accent);padding-left:1rem;color:var(--muted);font-size:.9rem}.game-shell,.game-panel,[data-game-root]{background:#fff;border:2px solid var(--accent);border-radius:6px;margin:2rem 0;padding:clamp(1rem,3vw,1.7rem);min-width:0}.prose.article .game-shell,.prose.article .game-panel{padding:clamp(1rem,3vw,1.7rem)}.game-shell h2,.game-panel h2,[data-game-root] h2{margin-top:0}.game-shell button,.game-panel button,[data-game-root] button,.game-button{font:inherit;line-height:1.6;min-height:44px;padding:.65rem 1rem;border:1px solid var(--accent);border-radius:4px;background:#fff;color:var(--ink);cursor:pointer;max-width:100%;overflow-wrap:anywhere}.game-shell button:hover:not(:disabled),.game-panel button:hover:not(:disabled),[data-game-root] button:hover:not(:disabled){background:var(--play-tint)}.game-shell button:disabled,.game-panel button:disabled,[data-game-root] button:disabled{cursor:default;opacity:.7}.game-shell .primary,.game-panel .primary,[data-game-root] .primary,.game-start,.game-next{background:var(--accent);color:#fff}.game-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;margin:1rem 0}.game-options button,.game-option{width:100%;min-height:68px;text-align:left}.game-actions{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.25rem}.game-progress{color:var(--muted);font-size:.9rem;font-variant-numeric:tabular-nums}.game-question{font-weight:700;font-size:1.15rem;line-height:1.8}.game-feedback{margin-top:1rem;padding:1rem;background:var(--play-tint);border-left:4px solid var(--accent)}.game-feedback:empty{display:none}.game-feedback p{margin:.4rem 0;line-height:1.8}.game-feedback .correct,.game-feedback.is-correct{border-color:var(--play-good)}.game-feedback .incorrect,.game-feedback.is-incorrect{border-color:var(--play-bad)}.game-order,.game-selection{padding-left:1.5rem}.game-order li,.game-selection li{margin:.5rem 0}.game-estimate label{display:block;margin:.8rem 0 .35rem}.game-estimate input[type=number],[data-game-root] input[type=number],.game-shell input[type=number]{font:inherit;min-height:44px;max-width:100%;width:12rem;padding:.5rem;border:1px solid var(--accent);border-radius:3px}.game-estimate input[type=range],[data-game-root] input[type=range],.game-shell input[type=range]{display:block;width:100%;min-height:44px;accent-color:var(--accent);margin:.5rem 0}.game-range-labels{display:flex;justify-content:space-between;gap:1rem;font-size:.85rem;color:var(--muted)}.game-result{padding:.5rem 0}.game-score{font-size:1.8rem;font-weight:700;font-variant-numeric:tabular-nums}.game-best{font-size:.95rem}.game-answer-list{margin:2rem 0}.game-answer-list summary{border-color:var(--play-border);border-radius:3px}.game-answer-list .table-wrap{margin-top:.5rem}.game-sources{padding-bottom:2rem}.empty-state{padding:1.5rem;background:#fff;border-left:3px solid var(--accent)}.play-ad{margin:4rem 0;padding:2rem 0;border-block:1px solid var(--play-border);text-align:center;clear:both}.play-ad-label{font-size:.8rem;color:var(--muted)}.play-ad-content,.play-ad-preview{min-height:250px;width:100%;max-width:100%;overflow-wrap:anywhere}.play-ad-preview{display:grid;place-items:center;padding:1rem;background:#f0efe9;border:1px dashed var(--muted)}.play-ad-privacy{font:inherit;min-height:44px;padding:.5rem 1rem;max-width:100%}.play-ad:has(ins[data-ad-status=unfilled]){display:none}.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}
@media(max-width:650px){.game-cards{grid-template-columns:1fr}.game-options{grid-template-columns:1fr}.game-shell,.game-panel,[data-game-root]{margin:1.5rem 0}.game-actions>*{flex:1 1 auto}.game-question{font-size:1.05rem}.hero h1{font-size:2rem}.prose table.game-answers{min-width:0}.game-answers th,.game-answers td{overflow-wrap:anywhere}.play-ad{margin:3rem 0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.game-shell,.game-panel,[data-game-root],.play-ad,.play-ad-privacy{display:none!important}.game-answer-list{break-inside:avoid}}
/* Engine class contract. */
.game-stage{min-width:0}.game-prompt{font-weight:700;font-size:1.15rem;line-height:1.8}.game-choices{display:grid;grid-template-columns:1fr;gap:.75rem;margin:1rem 0;min-width:0}.game-choices>button{width:100%;min-height:68px;text-align:left}.game-choices>label{display:block}.game-choices input[type=number]{font:inherit;min-height:44px;width:12rem;max-width:100%;padding:.5rem;border:1px solid var(--accent);border-radius:3px}.game-choices input[type=range]{display:block;width:100%;min-height:44px;accent-color:var(--accent)}.game-controls{display:flex;flex-wrap:wrap;gap:.6rem;margin:1rem 0}.game-answer{padding:.6rem 0}.game-answer ul{margin:.5rem 0;padding-left:1.4rem}@media(max-width:650px){.game-prompt{font-size:1.05rem}.game-controls>*{flex:1 1 auto}}

/* Answer marking and emphasis (2026-11-06). */
.game-choices.is-pair{grid-template-columns:repeat(2,minmax(0,1fr))}.game-choices.is-pair>button{text-align:center;font-size:1.2rem;font-weight:700;min-height:96px}
.game-choices>button.is-correct{border:2px solid var(--play-good);background:#e5f1ea;color:var(--play-good);font-weight:700;opacity:1}.game-choices>button.is-wrong{border:2px solid var(--play-bad);background:#f6e8e6;color:var(--play-bad);opacity:1}
.game-shell button.is-primary,.game-button.is-primary{background:var(--accent);color:#fff;font-weight:700;padding-inline:1.6rem}.game-shell button.is-primary:hover:not(:disabled){background:var(--accent);filter:brightness(1.1)}
.game-answer{margin-top:1rem;padding:.8rem 1rem;border-left:4px solid var(--accent);background:var(--play-tint)}.game-answer h3{margin:0 0 .3rem;font-size:1.1rem}.game-answer.is-correct{border-left-color:var(--play-good)}.game-answer.is-correct h3{color:var(--play-good)}.game-answer.is-wrong{border-left-color:var(--play-bad)}.game-answer.is-wrong h3{color:var(--play-bad)}
.game-stage>.game-button{margin:.4rem .6rem .4rem 0}.game-progress{margin:-.4rem 0 .6rem}.game-score{font-size:2.4rem;font-weight:700;color:var(--accent);margin:.2rem 0;font-variant-numeric:tabular-nums}
.hero h1 .chunk{display:inline-block}
@media(max-width:520px){.game-choices.is-pair>button{font-size:1.05rem;min-height:80px}}
@media(max-width:650px){.prose.article h1{font-size:1.55rem;line-height:1.5}.prose.article .article-lead{font-size:.98rem;line-height:1.9}.game-shell{margin-top:1.2rem}}