/* Large, keyboard-operable game boards; no drag-only controls or color-only answers. */
.sg-hub h2,.sg-play h2{margin:8px 0 14px}.sg-pack-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:14px}.sg-pack h3{font-size:20px;margin:12px 0}.sg-pack{border-top:4px solid var(--brand);display:flex;flex-direction:column;align-items:flex-start;gap:5px}.sg-pack p{margin:5px 0}.sg-mapping{width:100%;margin-top:10px;border-top:1px solid var(--line);padding-top:10px}.sg-mapping summary,details.card>summary{cursor:pointer;font-weight:600}.sg-scope{background:var(--brand-weak,#eff6ff);padding:16px;border-radius:12px;margin:12px 0;line-height:1.7}.sg-context{white-space:pre-line;background:var(--bg,#f8fafc);padding:16px;border-left:4px solid var(--brand);border-radius:4px;line-height:1.8}.sg-play{max-width:960px;margin:auto}.sg-title{max-width:960px;margin:0 auto 14px}.sg-title .row{justify-content:space-between}.sg-sort{display:grid;gap:12px;margin:18px 0}.sg-sort-card{border:1px solid var(--line);border-radius:10px;padding:14px}.sg-sort-card p{margin:0 0 12px;line-height:1.7}.sg-bins,.sg-controls{display:flex;gap:8px;flex-wrap:wrap}.sg-choice,.sg-tile,.sg-link-card{font:inherit;text-align:left;cursor:pointer;border:1px solid var(--line);background:var(--card,#fff);color:var(--ink);padding:12px 14px;border-radius:9px;min-height:46px;line-height:1.6;overflow-wrap:anywhere}.sg-choice.selected,.sg-link-card.selected{border:2px solid var(--brand);background:var(--brand-weak,#eff6ff)}.sg-choice.selected:before{content:'✓ ';font-weight:bold}.sg-choice:disabled,.sg-tile:disabled,.sg-link-card:disabled{cursor:default;opacity:.85}.sg-choice:focus-visible,.sg-tile:focus-visible,.sg-link-card:focus-visible{outline:3px solid #f59e0b;outline-offset:2px}.sg-chain{background:#eff6ff;border:1px dashed var(--brand);border-radius:10px;padding:16px 16px 16px 44px;min-height:80px}.sg-chain li{margin:8px 0}.sg-chain .sg-tile{width:100%}.sg-tray{display:grid;gap:10px;margin:16px 0}.sg-link-board{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:16px 0}.sg-link-card{display:block;width:100%;margin:0 0 12px}.sg-link-value{display:block;border-top:1px solid var(--line);margin-top:10px;padding-top:8px;font-size:.9em}.sg-link-card.connected{border-style:dashed;background:#f0fdf4}.sg-hint{background:#fffbeb;border:1px solid #fcd34d;padding:14px;border-radius:10px;margin:14px 0}.sg-feedback{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:18px;margin-top:20px;line-height:1.75}.sg-explain{padding-left:24px}.sg-explain li{padding:8px 0}.sg-explain p{margin:4px 0;color:var(--ink-2)}.sg-result{text-align:center;max-width:850px;margin:auto;line-height:1.8}.sg-result-icon{font-size:60px}.sg-draft{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 0;border-top:1px solid var(--line)}.sg-save{margin-bottom:0}.sg-controls{margin:20px 0 4px}@media(max-width:520px){.sg-link-board{gap:10px;grid-template-columns:1fr 1fr}.sg-link-card{padding:10px;font-size:14px}.sg-sort-card{padding:12px}.sg-choice{flex:1 1 100%;text-align:center}.sg-controls .btn{width:100%}.sg-title .row{align-items:flex-start;gap:10px}.sg-title .btn{white-space:normal}.sg-feedback{padding:12px}.sg-draft{align-items:flex-start}.sg-play{padding:14px}}

.sg-sort-tray{border:1px dashed var(--brand);border-radius:12px;padding:14px;background:var(--brand-weak)}.sg-sort-tray h3,.sg-bin h3{font-size:16px;margin:0 0 8px}.sg-bin-board{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:12px;margin:16px 0}.sg-bin{border:2px solid var(--line);border-radius:12px;padding:12px;background:#f8fafc;min-height:160px}.sg-bin .sg-tray{margin-bottom:0}.sg-tile.selected{border:2px solid var(--brand);background:#dbeafe}.sg-tile.selected:before{content:'已选 · ';font-weight:700}.sg-drop{width:100%;min-height:42px}.sg-board-status{padding:10px 0;color:var(--ink-2)}
.sg-lab{border:1px solid var(--line);border-radius:12px;padding:16px;margin:14px 0}
.sg-model-field{display:grid;gap:6px;margin:10px 0;min-width:0;flex:1 1 200px}
.sg-model-field input,.sg-model-field select{min-height:44px;max-width:100%;box-sizing:border-box;font:inherit;padding:9px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink)}
.sg-model-controls,.sg-model-questions{padding:12px;border:1px solid var(--line);border-radius:8px;min-width:0;margin:12px 0}
.sg-model-questions legend,.sg-model-controls legend{font-weight:700;padding:0 6px}
.sg-model-table{overflow-x:auto;margin:14px 0}
.sg-model-table table{border-collapse:collapse;width:100%;min-width:280px}
.sg-model-table th,.sg-model-table td{padding:8px;border:1px solid var(--line);text-align:left}
.sg-model-table caption{font-size:.9rem;color:var(--ink-2);text-align:left}
.sg-model-graph svg{width:100%;max-width:600px;display:block;height:auto}
.sg-model-thermometer svg{height:280px;width:230px;max-width:100%;display:block}
.sg-model-output{margin:14px 0;padding:12px;background:var(--bg);border-radius:10px}
.sg-model-assumptions{padding:10px;background:var(--brand-weak);border-radius:8px}
.sg-atom-board,.sg-valence-balance{padding:14px;margin:12px 0;border:2px solid var(--brand);border-radius:12px;background:var(--card)}
.sg-atom-nucleus{display:inline-block;padding:12px;background:var(--amber-weak);border-radius:12px}
.sg-atom-electrons{padding:12px 0;line-height:2;overflow-wrap:anywhere}
.sg-atom-electrons span[aria-hidden]{display:inline-block;border:1px solid var(--brand);border-radius:20px;padding:0 5px;margin:2px;font-size:.85rem}
.sg-model-history{margin:12px 0}.sg-model-history li{margin:10px 0 10px 20px}
.sg-lab :focus-visible{outline:3px solid var(--brand);outline-offset:3px}
@media(max-width:600px){.sg-lab{padding:10px}.sg-model-controls{display:block}.sg-model-table{font-size:.85rem}.sg-model-field{width:100%}}
.sg-text-model{margin:16px 0;min-width:0}
.sg-source-text,.sg-cloze-passage{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:16px;line-height:1.95}
.sg-text-span{padding:12px 0;border-bottom:1px solid var(--line)}
.sg-text-span:last-child{border-bottom:0}
.sg-span-tools,.sg-clue-buttons{display:flex;flex-wrap:wrap;gap:7px;margin-top:8px}
.sg-span-tools .btn,.sg-clue-buttons .btn{min-height:44px}
.sg-span-tools .selected,.sg-clue-buttons .selected{background:var(--brand);border-color:var(--brand);color:white}
.sg-annotation-tasks fieldset,.sg-clue-tasks fieldset{min-width:0;border:1px solid var(--line);border-radius:9px;padding:12px;margin:12px 0}
.sg-annotation-tasks legend,.sg-clue-tasks legend{font-weight:700;padding:0 6px}
.sg-field-help{display:block;color:var(--ink-2);margin:7px 0}
.sg-text-response{box-sizing:border-box;width:100%;max-width:100%;min-height:160px;resize:vertical;padding:12px;border:1px solid var(--line);border-radius:8px;font:inherit;line-height:1.8;color:var(--ink);background:var(--card)}
.sg-self-note{margin:10px 0;padding:10px;border-radius:8px;background:var(--amber-weak);color:#78350f;font-size:.9rem}
.sg-text-explanation ul,.sg-text-explanation ol{padding-left:24px}.sg-text-explanation h4{margin-top:14px}
.sg-word-bank{padding:12px 0;line-height:2.3}.sg-word-bank .tag{margin:3px;display:inline-block}
.sg-cloze-passage p{margin:10px 0}.sg-gap-label{display:inline-block;max-width:100%}
.sg-gap-input{width:140px;max-width:100%;min-height:44px;padding:6px 8px;font:inherit;border:1px solid var(--brand);border-radius:7px;color:var(--ink);background:var(--card)}
.sg-model-feedback{padding:8px;margin:8px 0;background:var(--amber-weak);border-radius:6px;color:#78350f}
.sg-text-model :focus-visible{outline:3px solid var(--brand);outline-offset:3px}
@media(max-width:600px){.sg-source-text,.sg-cloze-passage{padding:10px}.sg-span-tools .btn{flex:1 1 auto}.sg-gap-input{width:116px}}
.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}

/* Circuit games: static cartoon feedback, never strobe or autoplay sound. */
.sg-circuit{padding:12px;border:1px solid var(--line);border-radius:14px;margin:16px 0;min-width:0}
.sg-circuit-banner{display:flex;align-items:center;gap:14px;padding:14px;background:#eff6ff;border:2px solid #93c5fd;border-radius:12px;color:#172554}
.sg-circuit-banner.failed{background:#fff7ed;border-color:#fb923c;color:#7c2d12}
.sg-circuit-banner p{margin:5px 0;font-size:.9rem;line-height:1.6}.sg-circuit-mascot{font-size:44px;flex-shrink:0}
.sg-circuit-svg{display:block;width:100%;height:auto;max-height:470px;background:#fff;border:1px solid #cbd5e1;border-radius:10px}
.sg-circuit-hit{display:block;width:100%;height:100%;padding:0;cursor:pointer;background:transparent;border:2px solid transparent;border-radius:8px}
.sg-circuit-hit:focus-visible{outline:none;border:3px solid #d97706;background:#fef3c750}.sg-circuit-hit:disabled{cursor:default}
.sg-circuit-controls{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.sg-circuit-controls .btn{min-height:44px;white-space:normal}
.sg-circuit-target{padding:12px;background:var(--bg);border-radius:8px;margin:12px 0}.sg-circuit-target ul,.sg-circuit fieldset ol,.sg-circuit-log ol{padding-left:24px;line-height:1.7}
.sg-circuit fieldset{min-width:0;border:1px solid var(--line);border-radius:9px;padding:12px}.sg-circuit legend{font-weight:700;padding:0 6px}.sg-circuit-log{margin:12px 0;padding:10px;border:1px solid var(--line);border-radius:8px}.sg-circuit-log ol{max-height:180px;overflow:auto}.sg-circuit :focus-visible{outline:3px solid #d97706;outline-offset:2px}
@media(max-width:600px){.sg-circuit{padding:8px}.sg-circuit-controls .btn{flex:1 1 140px}.sg-circuit-banner{padding:10px;gap:8px}.sg-circuit-mascot{font-size:34px}.sg-circuit fieldset{padding:8px}}
@media(prefers-reduced-motion:reduce){.sg-circuit *{animation:none!important;transition:none!important}}

.sg-circuit-diagram{overflow-x:auto;max-width:100%;margin:12px 0}.sg-circuit-diagram .sg-circuit-svg{min-width:560px}.sg-circuit-diagram:focus-visible{outline:3px solid #d97706;outline-offset:2px}