.levelGrid{grid-template-columns:repeat(4,1fr)}
.playOptions{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}
.playOptions fieldset{border:0;padding:0;margin:0;min-width:0}
.playOptions legend{font-size:13px;font-weight:750;margin-bottom:10px}
.optionRow{display:flex;gap:8px;align-items:center;font-size:13px;line-height:1.5;margin:9px 0;cursor:pointer}
.optionRow input{accent-color:#7ce4d7;width:17px;height:17px;flex-shrink:0}
.learnLink{display:block;text-align:center;color:#a6f1e4;margin:19px 0;line-height:1.6}
.playProgress{color:#b8cfdf;font-size:12px;line-height:1.7;font-variant-numeric:tabular-nums}
.playProgress progress{display:block;width:100%;height:5px;accent-color:#7ce4d7;margin-top:5px}
.timerBar{border:1px solid #587e8b;border-radius:11px;padding:9px 11px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:8px;background:#10283b;font-variant-numeric:tabular-nums}
.timerBar strong{font-size:23px;color:#adf5e8;white-space:nowrap}.timerBar small{font-size:11px;color:#c1d5df}
.timerBar.urgent{border-color:#f6aa7d}.timerBar.urgent strong{color:#ffc193}
.timeAttack .timerBar{position:sticky;top:0;z-index:8}
.timeTrack{grid-column:1/-1;height:12px;position:relative;overflow:hidden;background:#081825;border:1px solid #385366;border-radius:6px}
.timeTrack span{position:absolute;top:0;bottom:0;display:block}
#timeFill{left:0;width:100%;background:#81e5d8;transition:width .12s linear}
#timeLoss{width:0;background:#ff766f;transform-origin:left center}
.timeFeedback{grid-column:1/-1;min-height:18px;font-size:13px;font-weight:800;color:#ffb5ab}
.timerBar.penalty{border-color:#ff7b75;animation:penalty-flash .8s ease-out}
.timerBar.penalty strong{color:#ff9a91}.timerBar.penalty #timeFill{background:#f87871}
.timerBar.penalty #timeLoss{animation:penalty-drain .65s ease-out both}
.timerBar.success .timeFeedback{color:#9af2cf}
.keyboardHelp{font-size:11px;line-height:1.6;margin:8px 0 0;color:#b3cadd}
.answerBtn kbd{font:700 12px/1 system-ui;padding:4px 6px;margin-left:5px;border:1px solid #a6d7db70;border-radius:5px;background:#0b243a66}
.answerBtn:disabled{cursor:default;opacity:.6}
@keyframes penalty-flash{0%,45%{background:#702c35;box-shadow:0 0 0 3px #f66c7240}25%,75%,100%{background:#10283b;box-shadow:none}}
@keyframes penalty-drain{0%{transform:scaleX(1);opacity:1}100%{transform:scaleX(0);opacity:.25}}
@media(prefers-reduced-motion:reduce){.timerBar.penalty,.timerBar.penalty #timeLoss{animation:none}#timeFill{transition:none}.timerBar.penalty{background:#512934}.timerBar.penalty #timeLoss{opacity:.35}}
.formulaToggle{display:flex;align-items:center;gap:8px;font-size:12px;color:#c4d7ed;cursor:pointer}
.formulaToggle input{accent-color:#7ce4d7}
#questionFormula{margin-top:9px;font-size:17px;padding:10px;border:1px solid #44617a;border-radius:10px;background:#0d2034}
.formulaDefinition{font-size:13px;color:#b7cedd;border-top:1px solid #36546b;margin-top:9px;padding-top:8px;line-height:1.8}
#backgroundCard{border-top:1px solid #476077;padding-top:12px;color:#d2e6ef}
#backgroundCard h3{font-size:14px;line-height:1.6;margin:0 0 7px;color:#9ce6d8}
#backgroundCard p{font-size:12px;line-height:1.8;margin:0 0 8px}
#backgroundCard a{font-size:12px;color:#bceee7}
#circleNotice{color:#e1bcfa;font-size:11px;line-height:1.5}
#panel.answered{overflow-y:auto}#panel.answered #resultPanel{flex:none;overflow:visible}
#panel.answered #nextBtn{position:sticky;bottom:0;z-index:5}
.finishCard{padding:28px;border:1px solid #426478;border-radius:20px;background:#10263c;margin:24px 0}
.finishScore{font-size:40px;color:#8eeddb;font-weight:800;margin:20px 0}
.finishCard .actions{margin-top:25px}
@media(max-width:760px){.levelGrid{grid-template-columns:repeat(2,1fr)}.playOptions{gap:12px}.playProgress{font-size:11px}.timerBar{padding:6px 9px}.timerBar strong{font-size:20px}#panel{gap:12px}#panel.hintExpanded:not(.answered) #choicePanel{top:25px}}
@media(max-width:400px){.playOptions{grid-template-columns:1fr}.finishCard{padding:20px}}