/* Quiz focus mode: reduce chrome and spacing without clipping learning content. */
body[data-screen="quiz"] .site-header{height:58px;min-height:58px;padding-top:6px;padding-bottom:6px;flex-wrap:nowrap;gap:12px}
body[data-screen="quiz"] .site-header nav,body[data-screen="quiz"] .brand small,body[data-screen="quiz"] .sync-bar,body[data-screen="quiz"]>footer{display:none}
body[data-screen="quiz"] .brand img{width:38px;height:40px}
body[data-screen="quiz"] .brand strong{font-size:24px}
body[data-screen="quiz"] main{padding-top:8px;padding-bottom:12px}
body[data-screen="quiz"] .quiz-layout{max-width:780px}
.quiz-layout>.back-button{padding:4px 0;margin:0 0 5px;min-height:26px;font-size:13px}
.quiz-layout .quiz-top{margin-bottom:7px;gap:8px;font-size:13px;min-height:36px}
.quiz-layout .quiz-tools{gap:6px}
.quiz-layout .quiz-tools .read-button,.quiz-layout .quiz-tools .sound-button,.quiz-layout .quiz-tools .voice-settings-button{min-height:36px;height:36px;padding:6px 10px;font-size:13px}
.quiz-layout .quiz-tools .sound-button{width:36px;min-width:36px;padding:0;font-size:19px}
.quiz-layout .quiz-tools #quizClock{padding:5px 8px;font-size:12px}
.quiz-layout .quiz-progress{height:5px;margin-bottom:9px}
.quiz-layout .quiz-card{padding:15px 18px;border-radius:22px;overflow:hidden}
.quiz-layout .quiz-buddy{min-height:35px;margin:0 0 5px;gap:8px}
.quiz-layout .quiz-buddy img{width:32px;height:35px}
.quiz-layout .quiz-buddy>span{font-size:12px;padding:5px 10px;border-radius:12px}
.quiz-layout .success-medal{font-size:20px}
.quiz-layout .question-gems{gap:9px;margin:0 0 5px;min-height:14px}
.quiz-layout .question-gems i,.quiz-layout .question-gems .done{font-size:12px}
.quiz-layout .quiz-card>.eyebrow{font-size:10px;letter-spacing:.7px;line-height:1.3}
.quiz-layout .recognition-prompt{font-size:clamp(21px,3vw,27px);padding:8px 0 4px;line-height:1.25}
.quiz-layout .equation{font-size:clamp(28px,6vw,44px);padding:10px 0 12px}
.quiz-layout .answers{gap:9px;margin:10px 0}
.quiz-layout .answer-option{min-height:52px;padding:8px 10px;font-size:27px;border-width:2px;border-radius:15px;box-shadow:0 3px 0 #8dc8e9}
.quiz-layout .recognition-answers{grid-template-columns:repeat(4,minmax(0,1fr))}
.quiz-layout .comparison-answers{grid-template-columns:repeat(auto-fit,minmax(130px,1fr))}
.quiz-layout .comparison-answers .answer-option{font-size:18px;line-height:1.25}
.quiz-layout .family-equation-answers .answer-option,.quiz-layout .group-equation-answers .answer-option{font-size:18px}
.quiz-layout .picture-answers{grid-template-columns:repeat(auto-fit,minmax(155px,1fr));gap:10px;margin:10px 0}
.quiz-layout .picture-answers .group-choice{min-height:116px;padding:8px;overflow:hidden}
.quiz-layout .group-choice .group-letter{font-size:15px;padding:2px 3px}
.quiz-layout .group-choice .count-objects,.quiz-layout .group-choice .count-objects.many{height:85px}
.quiz-layout .group-choice .count-object{width:40px;height:40px}
.quiz-layout .group-choice .many .count-object{width:min(16%,36px);height:auto;aspect-ratio:1}
.quiz-layout .count-scenes{margin:9px auto;gap:8px;max-width:510px}
.quiz-layout .count-scenes.multi{grid-template-columns:repeat(2,minmax(0,1fr))}
.quiz-layout .count-group{padding:7px 6px;border-radius:16px}
.quiz-layout .count-objects{height:116px}
.quiz-layout .count-objects.compact{height:90px}
.quiz-layout .count-object{width:52px;height:52px}
.quiz-layout .compact .count-object{width:36px;height:36px}
.quiz-layout .count-objects.many,.quiz-layout .count-objects.compact.many{height:118px}
.quiz-layout .count-objects.many .count-object{width:min(16%,42px);height:auto;aspect-ratio:1}
.quiz-layout .count-mark{width:22px;height:22px;font-size:13px;top:-4px}
.quiz-layout .match-groups{gap:9px;margin:10px 0;grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.quiz-layout .match-groups .count-objects,.quiz-layout .match-groups .count-objects.many{height:90px}
.quiz-layout .match-numbers{grid-template-columns:repeat(4,minmax(0,1fr));gap:5px;margin:5px 0 2px}
.quiz-layout .match-numbers button{min-height:40px;font-size:19px;border-radius:9px;box-shadow:0 2px 0 #aacfe1}
.quiz-layout .confirm-answer{margin:10px auto 5px;min-height:42px;padding:8px 18px;font-size:16px}
.quiz-layout .build-frame{min-height:136px;margin:10px 0;border-radius:18px}
.quiz-layout .build-frame .count-objects,.quiz-layout .build-frame .count-objects.many{height:126px}
.quiz-layout .builder-controls{gap:8px}
.quiz-layout .builder-controls .primary,.quiz-layout .builder-controls .secondary,.quiz-layout .object-source{min-height:42px;padding:7px 12px;font-size:15px}
.quiz-layout .object-source img{width:32px;height:32px}
.quiz-layout .empty-frame{font-size:16px}
.quiz-layout .check-count,.quiz-layout .look-again,.quiz-layout .rearrange-button{margin:6px auto;min-height:36px;padding:6px 12px;font-size:13px}
.quiz-layout .feedback{min-height:38px;margin-top:8px;padding:8px 11px;font-size:14px;line-height:1.35;border-radius:12px;overflow-wrap:anywhere}
.quiz-layout .feedback strong{font-size:14px;margin-bottom:3px}
.quiz-layout .quiz-footer{margin-top:9px;gap:8px;flex-wrap:nowrap}
.quiz-layout .quiz-footer .primary,.quiz-layout .hint-button{min-height:42px;padding:8px 16px;font-size:16px}
.quiz-layout .quiz-footer .small-muted{font-size:11px!important}
.quiz-layout .small-muted{font-size:12px;margin-top:6px}
.quiz-layout .keyboard-note{font-size:11px;margin-top:8px}
.quiz-layout .answer-input{margin:7px 0;gap:8px}
.quiz-layout .answer-input input{max-width:110px;padding:7px;min-height:40px}
/* Apply the same density to zero, grouping, comparison and ten-frame games. */
.quiz-layout .split-diagram{margin:8px auto;max-width:510px}
.quiz-layout .split-whole{font-size:14px;gap:8px}
.quiz-layout .split-whole b{min-width:45px;min-height:38px;font-size:25px;border-radius:12px}
.quiz-layout .split-branches{height:24px;font-size:20px;word-spacing:80px}
.quiz-layout .split-groups,.quiz-layout .split-big .split-groups{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.quiz-layout .split-group .count-objects,.quiz-layout .split-big .split-group .count-objects{height:88px}
.quiz-layout .split-unknown,.quiz-layout .split-empty{min-height:88px;font-size:38px}
.quiz-layout .split-equation{font-size:22px;margin:6px 0}
.quiz-layout .split-merged .count-objects{height:110px}
.quiz-layout .split-move-controls,.quiz-layout .comparison-tools{gap:7px;margin:8px 0}
.quiz-layout .split-move-controls button,.quiz-layout .comparison-tools button{min-height:40px;padding:7px 12px;font-size:14px}
.quiz-layout .split-part-inputs{gap:8px;margin:9px 0}
.quiz-layout .split-part-inputs>section{padding:7px;border-radius:12px}
.quiz-layout .split-number-grid{gap:4px;margin-top:5px;grid-template-columns:repeat(6,minmax(0,1fr))}
.quiz-layout .split-number-grid button{min-height:36px;font-size:18px;border-radius:8px}
.quiz-layout .comparison-groups{gap:8px;margin:10px 0}
.quiz-layout .comparison-group{border-width:2px;border-radius:16px}
.quiz-layout .compare-label{font-size:16px;padding:6px 9px}
.quiz-layout .comparison-group .count-objects{height:108px}
.quiz-layout .comparison-group .count-object{width:35px;height:40px}
.quiz-layout .comparison-group .count-objects.many .count-object{width:min(16%,36px);height:auto;aspect-ratio:1}
.quiz-layout .compare-empty{min-height:98px;margin:6px}
.quiz-layout .comparison-pairs{margin:8px auto;padding:8px 12px;max-width:330px}
.quiz-layout .pair-heading{font-size:17px;margin-bottom:4px}
.quiz-layout .pair-row{min-height:29px;margin:1px 0}
.quiz-layout .compare-item{width:28px;height:28px}
.quiz-layout .pair-empty{width:24px;height:24px}
.quiz-layout .pair-link{font-size:18px}
.quiz-layout .compare-rule{font-size:20px;margin:8px 0}
.quiz-layout .zero-frame,.quiz-layout .zero-frame.compact{min-height:106px;border-radius:18px}
.quiz-layout .zero-frame .count-objects,.quiz-layout .zero-frame.compact .count-objects{height:90px}
.quiz-layout .zero-frame-label{padding:5px 9px;font-size:14px}
.quiz-layout .zero-scenes,.quiz-layout .zero-transition,.quiz-layout .zero-match{margin:9px 0;gap:8px}
.quiz-layout .zero-empty{min-height:90px}
.quiz-layout .five-frame,.quiz-layout .ten-frame{max-width:320px;margin:10px auto;padding:7px;gap:5px;border-width:2px;border-radius:16px}
.quiz-layout .five-slot,.quiz-layout .ten-slot{min-height:0}
.quiz-layout .ten-equation{font-size:30px}
.quiz-layout .group-scenes{margin:9px auto;gap:8px;max-width:520px}
.quiz-layout .group-scenes.three-groups{grid-template-columns:repeat(3,minmax(0,1fr))}
.quiz-layout .group-zone,.quiz-layout .group-basket{padding:7px;border-radius:16px}
.quiz-layout .group-zone>strong,.quiz-layout .group-basket>strong{font-size:14px}
.quiz-layout .group-zone .count-objects,.quiz-layout .group-basket .count-objects{height:98px}
.quiz-layout .group-empty,.quiz-layout .group-unknown{min-height:98px;font-size:34px}
.quiz-layout .group-basket{margin:9px auto;max-width:390px}
.quiz-layout .group-arrow{font-size:22px;line-height:1.1}
.quiz-layout .group-goal{gap:8px;font-size:15px}
.quiz-layout .group-goal>b{font-size:23px;padding:3px 12px}
@media(max-width:760px){
 body[data-screen="quiz"] .site-header{height:50px;min-height:50px;padding:5px 3%;gap:7px}
 body[data-screen="quiz"] .brand img{width:30px;height:34px}
 body[data-screen="quiz"] .brand strong{font-size:21px}
 body[data-screen="quiz"] .profile-button{max-width:126px;padding:4px 7px;gap:4px}
 body[data-screen="quiz"] #profileName{max-width:66px;font-size:11px}
 body[data-screen="quiz"] .account-logout{padding:5px 7px;min-height:32px;font-size:10px}
 body[data-screen="quiz"] main{padding:6px 10px 10px}
 .quiz-layout .quiz-card{padding:11px 12px;border-radius:19px}
 .quiz-layout .quiz-top{font-size:11px;min-height:34px;gap:5px}
 .quiz-layout .quiz-top>span:first-child{min-width:0;line-height:1.25}
 .quiz-layout .quiz-tools .read-button{font-size:12px;padding:5px 7px}
 .quiz-layout .quiz-tools .voice-settings-button{padding:5px;min-width:32px}
 .quiz-layout .quiz-tools .sound-button{min-width:32px;width:32px;height:34px;min-height:34px;font-size:18px}
 .quiz-layout .quiz-buddy{min-height:30px;margin-bottom:3px}
 .quiz-layout .quiz-buddy img{width:27px;height:30px}
 .quiz-layout .quiz-buddy>span{font-size:11px;padding:4px 8px}
 .quiz-layout .question-gems{gap:7px;min-height:12px;margin-bottom:4px}
 .quiz-layout .quiz-card>.eyebrow{font-size:9px;letter-spacing:.4px}
 .quiz-layout .recognition-prompt{font-size:22px;padding:6px 0 3px}
 .quiz-layout .recognition-answers{grid-template-columns:repeat(2,minmax(0,1fr))}
 .quiz-layout .answer-option{min-height:48px;font-size:25px;padding:7px 9px;border-radius:13px}
 .quiz-layout .picture-answers,.quiz-layout.counting-quiz .picture-answers{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
 .quiz-layout .picture-answers .group-choice{min-height:96px;padding:5px 6px}
 .quiz-layout .group-choice .count-objects,.quiz-layout.counting-quiz .group-choice .count-objects.many{height:73px}
 .quiz-layout .group-choice .count-object,.quiz-layout.counting-quiz .group-choice .count-object{width:31px;height:31px}
 .quiz-layout .group-choice .many .count-object,.quiz-layout.counting-quiz .group-choice .many .count-object{width:min(16%,31px);height:auto;aspect-ratio:1}
 .quiz-layout .count-objects{height:100px}
 .quiz-layout .count-object{width:43px;height:43px}
 .quiz-layout .count-scenes .compact .count-object,.quiz-layout.counting-quiz .count-scenes .compact .count-object{width:31px;height:31px}
 .quiz-layout.counting-quiz .count-scenes .compact.many .count-object{width:min(16%,36px);height:auto;aspect-ratio:1}
 .quiz-layout .count-scenes.multi,.quiz-layout.counting-quiz .count-scenes.multi{grid-template-columns:repeat(2,minmax(0,1fr))}
 .quiz-layout .match-groups{grid-template-columns:repeat(auto-fit,minmax(80px,1fr));gap:6px}
 .quiz-layout .match-groups .count-group{padding:6px 4px}
 .quiz-layout .match-groups .count-objects{height:73px}
 .quiz-layout .match-groups .count-object{width:27px;height:27px}
 .quiz-layout .match-numbers{grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}
 .quiz-layout .match-numbers button{min-height:40px;font-size:18px}
 .quiz-layout.counting-quiz .match-groups{grid-template-columns:repeat(2,minmax(0,1fr))}
 .quiz-layout.counting-quiz .match-groups .count-objects.many{height:92px}
 .quiz-layout.counting-quiz .match-numbers{grid-template-columns:repeat(4,minmax(0,1fr))}
 .quiz-layout .split-number-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
 .quiz-layout .comparison-answers{grid-template-columns:repeat(2,minmax(0,1fr))}
 .quiz-layout .comparison-answers .answer-option{font-size:17px;min-height:48px}
 .quiz-layout .comparison-group .count-objects{height:94px}
 .quiz-layout .compare-item{width:25px;height:25px}
 .quiz-layout .pair-row{min-height:26px}
 .quiz-layout .zero-frame,.quiz-layout .zero-frame.compact{min-height:98px}
 .quiz-layout .five-frame,.quiz-layout .ten-frame{max-width:275px;gap:4px;margin:8px auto}
 .quiz-layout .group-scenes.three-groups{grid-template-columns:repeat(3,minmax(0,1fr))}
 .quiz-layout .group-zone .count-objects{height:86px}
 .quiz-layout .group-zone .compact .count-object{width:28px;height:28px}
 .quiz-layout .group-zone .compact.many .count-object{width:min(16%,30px);height:auto;aspect-ratio:1}
 .quiz-layout .group-zone>strong{font-size:12px}
 .quiz-layout .feedback{padding:7px 9px;font-size:13px;margin-top:7px;min-height:35px}
 .quiz-layout .feedback strong{font-size:13px}
 .quiz-layout .quiz-footer{margin-top:7px}
 .quiz-layout .quiz-footer .primary{min-height:42px;font-size:15px;padding:8px 13px}
 .quiz-layout .builder-controls .primary,.quiz-layout .builder-controls .secondary,.quiz-layout .object-source{font-size:14px;padding:6px 10px}
 .quiz-layout .keyboard-note{display:none}
}
@media(max-height:700px){
 .quiz-layout .quiz-buddy,.quiz-layout .question-gems{display:none}
 .quiz-layout .quiz-card{padding-top:10px;padding-bottom:10px}
 .quiz-layout .recognition-prompt{font-size:21px;padding-top:5px}
 .quiz-layout .picture-answers .group-choice{min-height:90px}
 .quiz-layout .feedback{margin-top:6px}
}
@media(max-height:580px){
 body[data-screen="quiz"] .site-header{height:44px;min-height:44px}
 .quiz-layout>.back-button{min-height:22px;margin-bottom:3px}
 .quiz-layout .quiz-top{min-height:32px;margin-bottom:4px}
 .quiz-layout .quiz-progress{margin-bottom:5px}
 .quiz-layout .recognition-prompt{font-size:20px;padding:4px 0}
 .quiz-layout .answers{margin:7px 0;gap:7px}
 .quiz-layout .picture-answers .group-choice{min-height:84px}
 .quiz-layout .group-choice .count-objects{height:60px}
 .quiz-layout .feedback{font-size:12px;padding:6px 8px;min-height:30px}
 .quiz-layout .quiz-footer{margin-top:6px}
}
@media(max-width:760px) and (orientation:landscape){
 .quiz-layout .picture-answers{grid-template-columns:repeat(4,minmax(0,1fr))}
 .quiz-layout .recognition-answers{grid-template-columns:repeat(4,minmax(0,1fr))}
 .quiz-layout .quiz-top{min-height:30px}
 .quiz-layout .group-choice .count-object{width:27px;height:27px}
}
/* Keep tightly arranged pictures distinct in the narrower answer cards. */
.quiz-layout .group-choice .count-object,.quiz-layout .compact .count-object{width:min(18%,40px);height:auto;aspect-ratio:1}
.quiz-layout .group-choice .many .count-object,.quiz-layout .compact.many .count-object{width:min(16%,36px);height:auto;aspect-ratio:1}
.quiz-layout .comparison-group .count-object{width:min(18%,35px);height:auto;aspect-ratio:1}
.quiz-layout .split-compare .split-whole,.quiz-layout .split-compare .split-branches{display:none}
.quiz-layout .zero-symbol{font-size:55px;margin:9px}
.quiz-layout .zero-operation,.quiz-layout .zero-rule{font-size:20px;margin:8px 0}
.quiz-layout .zero-tools{margin:8px 0;gap:7px}
.quiz-layout .zero-tools button{min-height:40px;padding:7px 12px;font-size:14px}
@media(max-width:760px){
 .quiz-layout .match-groups{grid-template-columns:repeat(2,minmax(0,1fr))}
 .quiz-layout .match-numbers{grid-template-columns:repeat(4,minmax(0,1fr))}
 .quiz-layout .match-groups .count-object{width:min(18%,31px);height:auto;aspect-ratio:1}
 .quiz-layout .match-groups .many .count-object{width:min(16%,31px);height:auto;aspect-ratio:1}
 .quiz-layout .zero-match{grid-template-columns:repeat(2,minmax(0,1fr))!important}
 .quiz-layout .zero-match .match-numbers{grid-template-columns:repeat(2,minmax(0,1fr))}
 .quiz-layout .zero-frame.compact .zero-empty{min-height:75px;margin:6px}
}
@media(max-height:450px) and (orientation:landscape){
 body[data-screen="quiz"] .site-header{display:none}
 .quiz-layout .quiz-top{min-height:30px}
 .quiz-layout .picture-answers{grid-template-columns:repeat(4,minmax(0,1fr))}
}

@media(max-width:760px){.quiz-layout .group-scenes.three-groups{grid-template-columns:repeat(2,minmax(0,1fr))}.quiz-layout .group-scenes.three-groups .group-zone:last-child{grid-column:1/-1}}

/* The practice page has one viewport-fitted frame, with no duplicated chrome. */
body[data-screen="quiz"] .site-header,body[data-screen="quiz"] .sync-bar,body[data-screen="quiz"]>footer{display:none}
body[data-screen="quiz"] main{padding:7px 10px;max-width:1100px}
.quiz-viewport{position:relative;max-width:780px;width:100%;margin:0 auto}
.quiz-viewport .quiz-fit-stage{position:absolute;left:0;top:0;width:100%;margin:0;transform-origin:top center}
.quiz-viewport .quiz-card{padding:14px 18px}
.quiz-viewport .recognition-answers{grid-template-columns:repeat(2,minmax(0,1fr))}
.quiz-viewport .answer-option{min-height:56px}
.quiz-viewport .quiz-top{min-height:30px;margin-bottom:5px}
.quiz-viewport .quiz-top .quiz-tools{flex-wrap:nowrap}
.quiz-viewport .quiz-top .quiz-tools #quizClock{display:none}
.quiz-viewport .quiz-footer .primary{min-height:46px;font-size:17px}
.quiz-viewport .feedback{font-size:14px;line-height:1.35}
.quiz-viewport.fit-dense .quiz-buddy,.quiz-viewport.fit-dense .question-gems{display:none}
.quiz-viewport.fit-dense .quiz-card{padding:10px 12px}
.quiz-viewport.fit-dense .recognition-prompt{font-size:21px;padding:5px 0 3px}
.quiz-viewport.fit-dense .answers{margin:8px 0}
.quiz-viewport.fit-dense .answer-option{min-height:48px;font-size:25px}
.quiz-viewport.fit-dense .feedback{padding:7px 9px;margin-top:6px}
.quiz-viewport.fit-dense .quiz-footer{margin-top:6px}
@media(min-width:900px){.quiz-viewport{max-width:860px}.quiz-viewport .picture-answers{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.quiz-viewport .count-scenes{max-width:580px}.quiz-viewport .count-scenes .count-objects:not(.compact){height:140px}}
@media(max-width:760px){.quiz-viewport .quiz-card{padding:12px}.quiz-viewport .recognition-prompt{font-size:23px}.quiz-viewport .count-scenes{max-width:450px}.quiz-viewport .count-scenes .count-objects:not(.compact){height:115px}.quiz-viewport .picture-answers{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(orientation:landscape) and (max-height:500px){.quiz-viewport .recognition-answers,.quiz-viewport .picture-answers{grid-template-columns:repeat(4,minmax(0,1fr))}.quiz-viewport .quiz-card{padding:8px 12px}.quiz-viewport .count-scenes .count-objects:not(.compact){height:84px}}