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55px;margin-bottom:4px}.history-line[data-depth="1"]{font-size:18px}.history-line[data-depth="2"]{font-size:15px}.history-line[data-depth="3"],.history-line[data-depth="4"]{font-size:12px}.equation-rail{font-size:34px;min-height:60px;padding:4px 16px;gap:10px;min-width:0;width:min(540px,calc(100vw - 20px))}.math-symbol{font-size:34px}.term-tile{font-size:34px;min-height:44px;min-width:42px;padding:3px 10px}.term-times,.fraction .num,.fraction .denom{font-size:26px}.camera-box{flex:1 1 0;min-height:0;height:100%;max-height:100%;max-width:min(calc(100vw - 520px),850px);aspect-ratio:4 / 3;width:auto;margin:0}.camera-size-btn{display:none}.answers-column{width:220px;gap:6px}.arithmetic-question{padding:6px 10px;border-radius:14px}.question-text{font-size:15px}.question-subtext{font-size:11px;margin-top:2px}.answer-card{flex:1;min-height:0;height:auto;padding:4px 10px;border-radius:14px}.answer-val{font-size:clamp(18px,4vh,26px)}.dwell-svg{width:clamp(24px,4vh,32px);height:clamp(24px,4vh,32px);right:10px}.story-presentation-panel{max-width:620px;gap:6px}.story-card{padding:6px 12px;min-height:0}.story-card-header{margin-bottom:3px;padding-bottom:2px;gap:5px}.story-card-icon{font-size:.95rem}.story-card-title{font-size:.78rem}.story-beats-container{gap:2px;min-height:0}.story-sentence{font-size:.88rem;line-height:1.25}.story-sentence.sentence-highlight{padding:1px 6px}.story-sentence.story-question-beat{margin-top:1px;padding-top:1px;font-size:.9rem}.story-choices-column{width:250px;gap:6px}.story-choices-column .choices-prompt.arithmetic-question{padding:6px 10px;border-radius:12px}.story-choices-column .choices-prompt .question-text{font-size:15px}.story-choices-column .choices-prompt .question-subtext{font-size:11px;margin-top:2px}.story-choices-column .story-choice-feedback-banner{padding:4px 8px;font-size:.8rem}.story-equation-card{padding:4px 6px;border-radius:12px}.forge-panel{width:145px;gap:6px}.forge-header{padding:4px 8px;margin-bottom:4px}.forge-card{flex:1;min-height:0;height:auto;border-radius:12px}.forge-symbol{font-size:32px}.blaster-panel{width:145px;gap:6px}.blaster-card{flex:1;min-height:0;height:auto;padding:3px 8px;border-radius:12px}.blaster-icon-wrap{width:30px;height:30px}.blaster-symbol{font-size:16px}.blaster-name{font-size:11px}.inverse-panel{width:150px;gap:6px}.inverse-card{flex:1;min-height:0;height:auto;padding:4px 8px;border-radius:12px}.inverse-val{font-size:22px}#app[data-phase=solved] .equation-area,#app[data-mode=mode_b][data-phase=solved] .equation-area{height:145px!important;min-height:145px!important;max-height:145px!important;flex:0 0 145px!important;flex-basis:145px!important}#app[data-phase=solved] .equation-history-container{display:none!important}#app[data-phase=solved] .solved-panel,.solved-panel{gap:3px!important;padding:0!important;margin:0!important}#app[data-phase=solved] .equation-rail.solved-rail,.solved-panel .equation-rail.solved-rail{min-height:42px!important;padding:2px 14px!important;gap:6px!important}.solved-line-wrap{font-size:32px!important;gap:8px!important}.solved-check{font-size:28px!important;margin-left:4px!important}#app[data-phase=solved] .solved-actions{margin-top:2px!important;gap:8px!important}.action-btn-primary{padding:6px 18px!important;font-size:14px!important;min-height:34px!important;border-radius:10px!important}.action-btn-dwell .btn-dwell-svg{width:26px!important;height:26px!important}.open-palm-advance-badge{margin-top:1px!important;padding:2px 10px!important;font-size:11px!important;gap:6px!important}.palm-ring-wrap{width:22px!important;height:22px!important}.palm-emoji{font-size:13px!important}}:root{--responsive-edge: clamp(8px, 1.8vw, 28px);--responsive-gap: clamp(4px, .8dvh, 10px);--panel-card-gap: clamp(5px, .9dvh, 9px);--portrait-panel-space: 0px}html,body{height:100%;min-height:0;overflow:hidden}#app{height:100vh;min-height:0;overflow:hidden}@supports (height: 100dvh){#app{height:100dvh}}.hud-header{flex:0 0 auto;min-height:48px;padding:clamp(5px,1dvh,12px) var(--responsive-edge);padding-top:max(clamp(5px,1dvh,12px),env(safe-area-inset-top));gap:10px}.brand-title{font-size:clamp(15px,1.55vw,20px);white-space:nowrap}.header-controls{margin-left:auto;gap:clamp(6px,1vw,12px)}.header-controls .icon-btn{min-width:44px;min-height:44px;justify-content:center;padding:7px clamp(10px,1.2vw,14px)}.control-icon{flex:0 0 auto;line-height:1}.stage-container{min-height:0;padding:clamp(2px,.7dvh,8px) var(--responsive-edge) clamp(3px,.8dvh,10px)}.workspace-center{min-width:0;min-height:0;gap:var(--responsive-gap)}.story-area{flex:0 0 auto;width:100%;min-height:0}.hud-footer{flex:0 0 auto;min-height:50px;padding:clamp(5px,1dvh,10px) var(--responsive-edge);padding-bottom:max(clamp(5px,1dvh,10px),env(safe-area-inset-bottom));gap:10px}.instruction-text{min-width:0;font-size:clamp(12px,1.3vw,15px);overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.hud-actions{flex:0 0 auto;gap:clamp(5px,.9vw,10px)}.hud-actions .icon-btn{min-height:40px;padding:6px clamp(8px,1vw,13px)}.story-presentation-panel{width:min(780px,calc(100vw - (2 * var(--responsive-edge))));max-width:100%;gap:var(--responsive-gap)}.story-card{padding:clamp(6px,1.1dvh,12px) clamp(12px,1.8vw,22px);border-radius:clamp(9px,1vw,14px)}.story-card-header{gap:clamp(5px,.7vw,8px);margin-bottom:clamp(3px,.6dvh,6px);padding-bottom:clamp(2px,.5dvh,5px)}.story-card-icon{font-size:clamp(.95rem,2dvh,1.25rem)}.story-card-title{font-size:clamp(.78rem,1.65dvh,1.05rem)}.story-beats-container{gap:clamp(2px,.45dvh,5px)}.story-sentence{font-size:clamp(.88rem,2dvh,1.18rem);line-height:1.32}.story-sentence.story-question-beat{font-size:clamp(.92rem,2.15dvh,1.24rem);margin-top:2px;padding-top:2px}.story-inline-icon .story-text-icon.math-item-token{width:clamp(24px,3.8dvh,36px)!important;height:clamp(24px,3.8dvh,36px)!important;min-width:clamp(24px,3.8dvh,36px)!important;min-height:clamp(24px,3.8dvh,36px)!important}.story-solving-bar{width:min(680px,calc(100vw - (2 * var(--responsive-edge))));max-width:100%;margin:0 auto;padding:clamp(5px,.8dvh,8px) clamp(10px,1.6vw,18px);border-radius:clamp(9px,1vw,12px)}.story-solving-left{min-width:0;gap:clamp(6px,1vw,10px)}.story-solving-icon{font-size:clamp(1rem,2.2dvh,1.25rem)}.story-solving-question{font-size:clamp(.88rem,1.9dvh,1.05rem);line-height:1.2;text-align:center}#app[data-mode=mode_b] .equation-area{height:clamp(100px,20dvh,205px);min-height:clamp(100px,20dvh,205px);max-height:clamp(100px,20dvh,205px);flex-basis:clamp(100px,20dvh,205px);padding-bottom:2px}#app[data-mode=mode_b] .equation-history-container{height:clamp(38px,9dvh,104px);min-height:clamp(38px,9dvh,104px);max-height:clamp(38px,9dvh,104px);flex-basis:clamp(38px,9dvh,104px);margin-bottom:clamp(2px,.5dvh,5px)}#app[data-mode=mode_b] .equation-rail.mode-b-rail{width:min(820px,calc(100vw - 440px));min-width:0;min-height:clamp(58px,9dvh,104px);padding:clamp(4px,.8dvh,12px) clamp(12px,2vw,42px);gap:clamp(9px,2vw,32px);font-size:clamp(30px,5.2dvh,58px)}#app[data-mode=mode_b] .equation-rail.mode-b-rail .math-symbol,#app[data-mode=mode_b] .equation-rail.mode-b-rail .term-tile{font-size:clamp(30px,5.2dvh,58px)}#app[data-mode=mode_b] .equation-rail.mode-b-rail .term-tile{min-width:clamp(44px,7dvh,80px);min-height:clamp(46px,7.5dvh,82px);padding:clamp(3px,.7dvh,8px) clamp(8px,1.4vw,18px);margin:0 clamp(1px,.4vw,6px)}#app[data-mode=mode_b] .equation-rail .math-item-token,#app[data-mode=mode_b] .solved-line-wrap .math-item-token{width:clamp(42px,7dvh,68px);height:clamp(42px,7dvh,68px);min-width:clamp(42px,7dvh,68px);min-height:clamp(42px,7dvh,68px)}#app[data-mode=mode_b] .equation-rail .term-tile .math-item-token{width:clamp(38px,6dvh,58px);height:clamp(38px,6dvh,58px);min-width:clamp(38px,6dvh,58px);min-height:clamp(38px,6dvh,58px)}#app[data-mode=mode_b] .camera-box{flex:1 1 0;min-height:0;height:100%;max-height:100%;max-width:min(calc(100vw - 580px),1100px);margin:0;border-radius:clamp(14px,1.5vw,24px)}#app[data-story-phase=choosing_equation] .story-presentation-panel{width:min(780px,calc(100vw - (2 * var(--responsive-edge))));max-width:calc(100vw - (2 * var(--responsive-edge)))}.forge-cards-vertical{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:repeat(4,minmax(0,1fr));gap:var(--panel-card-gap)}.answer-cards-list,.story-equation-cards-vertical{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:repeat(3,minmax(0,1fr));gap:var(--panel-card-gap)}.forge-card,.answer-card,.story-equation-card{min-height:0;height:auto}@media (max-width: 768px) and (orientation: portrait){:root{--responsive-edge: 8px;--responsive-gap: 3px;--portrait-panel-space: 0px}#app[data-story-feedback=true]{--portrait-panel-space: 0px}.hud-header{min-height:46px;padding-left:max(10px,env(safe-area-inset-left));padding-right:max(10px,env(safe-area-inset-right))}.brand-title{max-width:calc(100vw - 112px);overflow:hidden;font-size:clamp(13px,4vw,16px);text-overflow:ellipsis}.header-controls .icon-btn{width:44px;min-width:44px;padding:0}.camera-button-label,.settings-button-label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.stage-container{flex-direction:column;align-items:center;justify-content:flex-start;overflow:hidden}.workspace-center{flex:1 1 auto;width:100%;height:100%;overflow:visible}.hud-footer{min-height:50px;flex-wrap:nowrap;justify-content:center}.instruction-text{display:none}.hud-actions{width:100%;justify-content:center}.hud-actions .icon-btn{min-height:44px}#app[data-mode=mode_b] .equation-area{height:clamp(86px,16dvh,118px);min-height:clamp(86px,16dvh,118px);max-height:clamp(86px,16dvh,118px);flex-basis:clamp(86px,16dvh,118px)}#app[data-mode=mode_b] .equation-history-container{height:clamp(32px,6dvh,44px);min-height:clamp(32px,6dvh,44px);max-height:clamp(32px,6dvh,44px);flex-basis:clamp(32px,6dvh,44px)}#app[data-mode=mode_b] .equation-rail.mode-b-rail{width:min(calc(100vw - 16px),430px);max-width:100%;min-height:clamp(48px,8dvh,64px);padding:3px 7px;gap:clamp(4px,1.8vw,8px);font-size:clamp(23px,7vw,32px)}#app[data-mode=mode_b] .equation-rail.mode-b-rail .math-symbol,#app[data-mode=mode_b] .equation-rail.mode-b-rail .term-tile{font-size:clamp(23px,7vw,32px)}#app[data-mode=mode_b] .camera-box{align-self:flex-start;flex:0 0 auto!important;width:clamp(140px,min(48vw,calc((100dvh - 300px) * var(--camera-media-aspect, .75))),280px);max-width:calc(100vw - 130px);height:auto!important;min-height:0!important;max-height:none!important;aspect-ratio:auto;margin:0}#app[data-portrait-panel=true] .camera-box{margin-top:0}.forge-panel.panel-portrait-dock,.answers-column.panel-portrait-dock,.story-choices-column.panel-portrait-dock{position:absolute!important;right:auto!important;width:min(calc(100vw - 16px),440px)!important;height:auto!important;margin:0!important;gap:5px!important}.forge-panel.panel-portrait-dock .forge-header,.answers-column.panel-portrait-dock .arithmetic-question,.story-choices-column.panel-portrait-dock .choices-prompt.arithmetic-question{padding:4px 8px;margin:0;border-radius:10px}.forge-panel.panel-portrait-dock .forge-subtitle,.answers-column.panel-portrait-dock .question-subtext,.story-choices-column.panel-portrait-dock .question-subtext{display:none}.forge-panel.panel-portrait-dock .forge-cards-vertical{display:grid!important;grid-template-columns:repeat(4,minmax(0,1fr))!important;grid-template-rows:1fr!important;height:64px!important;gap:6px!important}.answers-column.panel-portrait-dock .answer-cards-list,.story-choices-column.panel-portrait-dock .story-equation-cards-vertical{display:grid!important;grid-template-columns:repeat(3,minmax(0,1fr))!important;grid-template-rows:1fr!important;height:64px!important;gap:6px!important}.forge-panel.panel-portrait-dock .forge-card,.answers-column.panel-portrait-dock .answer-card,.story-choices-column.panel-portrait-dock .story-equation-card{height:64px!important;min-height:64px!important}.story-presentation-panel,.story-solving-bar{width:min(calc(100vw - 16px),440px)}.story-presentation-panel .story-beats-container{min-height:96px}.story-sentence{font-size:clamp(.76rem,3.45vw,.9rem)}.story-sentence.story-question-beat{font-size:clamp(.8rem,3.6vw,.94rem)}}@media (max-height: 700px) and (orientation: landscape){.hud-header{min-height:42px;padding-top:3px;padding-bottom:3px}.header-controls .icon-btn{min-height:38px}.hud-footer{min-height:44px;padding-top:3px;padding-bottom:3px}.hud-actions .icon-btn{min-height:38px}#app[data-mode=mode_b] .equation-area{height:clamp(76px,18dvh,112px);min-height:clamp(76px,18dvh,112px);max-height:clamp(76px,18dvh,112px);flex-basis:clamp(76px,18dvh,112px)}#app[data-mode=mode_b] .equation-history-container{height:clamp(26px,7dvh,44px);min-height:clamp(26px,7dvh,44px);max-height:clamp(26px,7dvh,44px);flex-basis:clamp(26px,7dvh,44px)}#app[data-mode=mode_b] .camera-box{flex:1 1 0;min-height:0;height:100%;max-height:100%;max-width:min(calc(100vw - 480px),750px)}.story-card{padding-top:4px;padding-bottom:4px}.story-sentence{font-size:clamp(.76rem,2.1dvh,.86rem);line-height:1.16}.story-solving-bar{padding-top:4px;padding-bottom:4px}#app[data-phase=solved] .equation-area,#app[data-mode=mode_b][data-phase=solved] .equation-area{height:clamp(76px,18dvh,112px)!important;min-height:clamp(76px,18dvh,112px)!important;max-height:clamp(76px,18dvh,112px)!important;flex:0 0 clamp(76px,18dvh,112px)!important;flex-basis:clamp(76px,18dvh,112px)!important}#app[data-phase=solved] .equation-rail.solved-rail,.solved-panel .equation-rail.solved-rail{min-height:36px!important;padding:2px 10px!important}#app[data-phase=solved] .solved-line-wrap{font-size:clamp(22px,3.5dvh,28px)!important}#app[data-phase=solved] .solved-check{font-size:clamp(20px,3.2dvh,24px)!important}}@media (max-width: 1040px),(max-height: 650px){.camera-button-label,.settings-button-label{display:none}.header-controls .icon-btn{width:44px;min-width:44px;padding-left:0;padding-right:0}.instruction-text{font-size:12px}}@media (max-width: 768px) and (orientation: portrait){html,body{overflow-y:auto;overflow-x:hidden}#app{min-height:100vh;height:auto}.stage-container{flex-direction:column;padding:4px 8px 6px;align-items:center;justify-content:flex-start;overflow:visible}.workspace-center{width:100%;max-width:100%;gap:4px;flex:0 0 auto;height:auto}.hud-header{padding:6px 12px;gap:6px}.brand-title{font-size:14px;gap:6px}.brand-badge{font-size:9px;padding:2px 6px}.header-controls{gap:6px}.level-indicator{font-size:11px;padding:3px 8px}.icon-btn{padding:4px 8px;font-size:11px;gap:4px}.hud-footer{padding:6px 10px;gap:6px;flex-wrap:wrap;justify-content:center}.instruction-text{font-size:11px;gap:4px;width:100%;text-align:center;justify-content:center;margin-bottom:2px}.hud-actions{gap:6px}.version-badge{font-size:10px;padding:3px 6px}.equation-area{height:auto;min-height:75px;max-height:115px;flex:0 0 auto;padding-bottom:2px}.equation-history-container{height:38px;min-height:38px;max-height:38px;flex:0 0 38px;margin-bottom:2px}.history-line[data-depth="1"]{font-size:14px}.history-line[data-depth="2"]{font-size:12px}.history-line[data-depth="3"],.history-line[data-depth="4"]{font-size:10px}.equation-rail{min-height:48px;padding:4px 8px;font-size:24px;gap:6px;min-width:0;width:calc(100vw - 16px);max-width:360px;border-radius:14px}.math-symbol{font-size:24px}.term-tile{font-size:24px;min-height:36px;min-width:32px;padding:2px 6px;border-radius:10px}.term-times,.fraction .num,.fraction .denom{font-size:18px}.camera-box{align-self:flex-start;flex:0 0 auto!important;width:clamp(140px,min(48vw,calc((100dvh - 300px) * var(--camera-media-aspect, .75))),280px);max-width:calc(100vw - 130px);height:auto!important;min-height:0!important;max-height:none!important;aspect-ratio:auto;border-radius:14px;margin:0}.camera-box-header{padding:4px 10px}.camera-title{font-size:11px}.camera-hint-badge{font-size:10px;padding:1px 6px}.answers-column.panel-portrait-dock{position:relative!important;left:auto!important;top:auto!important;right:auto!important;width:min(calc(100vw - 16px),330px)!important;height:auto!important;margin:4px auto 0!important;gap:6px!important;z-index:35}.answers-column.panel-portrait-dock .arithmetic-question{padding:6px 10px;border-radius:12px}.answers-column.panel-portrait-dock .question-text{font-size:14px}.answers-column.panel-portrait-dock .question-subtext{font-size:10px;margin-top:1px}.answers-column.panel-portrait-dock .answer-cards-list{display:grid!important;grid-template-columns:repeat(3,1fr)!important;gap:6px!important;height:56px!important;width:100%}.answers-column.panel-portrait-dock .answer-card{height:56px!important;border-radius:12px;flex:none}.answers-column.panel-portrait-dock .answer-val{font-size:22px}.answers-column.panel-portrait-dock .dwell-svg{width:26px;height:26px;right:6px}.story-choices-column.panel-portrait-dock{position:relative!important;left:auto!important;top:auto!important;right:auto!important;width:min(calc(100vw - 16px),360px)!important;height:auto!important;margin:4px auto 0!important;gap:6px!important;z-index:35}.story-choices-column.panel-portrait-dock .choices-prompt.arithmetic-question{padding:6px 10px;border-radius:12px}.story-choices-column.panel-portrait-dock .question-text{font-size:14px}.story-choices-column.panel-portrait-dock .question-subtext{font-size:10px;margin-top:1px}.story-choices-column.panel-portrait-dock .story-choice-feedback-banner{padding:4px 8px;font-size:.8rem}.story-choices-column.panel-portrait-dock .story-equation-cards-vertical{display:grid!important;grid-template-columns:repeat(3,1fr)!important;gap:6px!important;height:64px!important;width:100%}.story-choices-column.panel-portrait-dock .story-equation-card{height:64px!important;border-radius:12px;flex:none;padding:4px 2px}.story-choices-column.panel-portrait-dock .choice-equation-expr{font-size:1rem;gap:2px}.story-choices-column.panel-portrait-dock .story-equation-card .choice-coeff-tile{font-size:1rem;padding:1px 4px}.story-choices-column.panel-portrait-dock .story-equation-card .math-item-token{width:24px;height:24px;min-width:24px;min-height:24px;padding:2px}.story-choices-column.panel-portrait-dock .choice-modifier-tile{font-size:.95rem;padding:1px 3px}.story-choices-column.panel-portrait-dock .choice-rhs{font-size:1rem}.story-choices-column.panel-portrait-dock .choice-dwell-svg{width:18px;height:18px;top:3px;right:3px}.forge-panel.panel-portrait-dock{position:relative!important;left:auto!important;top:auto!important;right:auto!important;width:min(calc(100vw - 16px),330px)!important;height:auto!important;margin:4px auto 0!important;gap:4px!important;z-index:35}.forge-panel.panel-portrait-dock .forge-header{padding:4px 8px;margin-bottom:2px;border-radius:10px}.forge-panel.panel-portrait-dock .forge-badge,.forge-panel.panel-portrait-dock .forge-subtitle{font-size:10px}.forge-panel.panel-portrait-dock .forge-cards-vertical{display:grid!important;grid-template-columns:repeat(4,1fr)!important;gap:6px!important;height:52px!important}.forge-panel.panel-portrait-dock .forge-card{height:52px!important;border-radius:10px;flex:none}.forge-panel.panel-portrait-dock .forge-symbol{font-size:26px}.blaster-panel.panel-portrait-dock{position:relative!important;left:auto!important;top:auto!important;right:auto!important;width:min(calc(100vw - 16px),330px)!important;height:auto!important;margin:4px auto 0!important;gap:4px!important;z-index:35}.blaster-panel.panel-portrait-dock .blaster-header{margin-bottom:2px}.blaster-panel.panel-portrait-dock .blaster-title{font-size:11px}.blaster-panel.panel-portrait-dock .blaster-caption{font-size:10px}.blaster-panel.panel-portrait-dock .blaster-cards-vertical{display:grid!important;grid-template-columns:repeat(5,1fr)!important;gap:4px!important;height:50px!important}.blaster-panel.panel-portrait-dock .blaster-card{height:50px!important;padding:2px 4px;border-radius:10px;justify-content:center;flex:none}.blaster-panel.panel-portrait-dock .blaster-name{display:none}.blaster-panel.panel-portrait-dock .blaster-icon-wrap{width:28px;height:28px}.blaster-panel.panel-portrait-dock .blaster-symbol{font-size:18px}.inverse-panel.panel-portrait-dock{position:relative!important;left:auto!important;top:auto!important;right:auto!important;width:min(calc(100vw - 16px),330px)!important;height:auto!important;margin:4px auto 0!important;gap:4px!important;z-index:35}.inverse-panel.panel-portrait-dock .inverse-header{margin-bottom:2px}.inverse-panel.panel-portrait-dock .inverse-title{font-size:11px}.inverse-panel.panel-portrait-dock .inverse-subtitle{font-size:10px}.inverse-panel.panel-portrait-dock .inverse-cards-list{display:grid!important;grid-template-columns:repeat(4,1fr)!important;gap:6px!important;height:52px!important}.inverse-panel.panel-portrait-dock .inverse-card{height:52px!important;border-radius:10px;flex:none}.inverse-panel.panel-portrait-dock .inverse-val{font-size:20px}}@media (max-width: 768px) and (orientation: portrait){html,body{height:100%;min-height:0;overflow:hidden}#app{height:100vh;min-height:0;overflow:hidden}@supports (height: 100dvh){#app{height:100dvh}}.stage-container{flex:1 1 auto;min-height:0;flex-direction:column;align-items:center;justify-content:flex-start;padding:2px 8px 3px;overflow:hidden}.workspace-center{flex:1 1 auto;width:100%;max-width:100%;height:100%;min-height:0;gap:3px;overflow:visible}.hud-header{min-height:46px;padding:max(3px,env(safe-area-inset-top)) max(10px,env(safe-area-inset-right)) 3px max(10px,env(safe-area-inset-left));flex-wrap:nowrap}.brand-title{max-width:calc(100vw - 112px);font-size:clamp(13px,4vw,16px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-controls .icon-btn{width:44px;min-width:44px;min-height:44px;padding:0}.hud-footer{flex:0 0 auto;min-height:50px;padding:3px 8px max(3px,env(safe-area-inset-bottom));flex-wrap:nowrap;justify-content:center}.instruction-text{display:none}.hud-actions{width:100%;justify-content:center;gap:5px}.hud-actions .icon-btn{min-height:44px;padding:5px 8px}#app[data-mode=mode_b] .camera-box{align-self:flex-start;flex:0 0 auto!important;width:clamp(140px,min(48vw,calc((100dvh - 300px) * var(--camera-media-aspect, .75))),280px);max-width:calc(100vw - 130px);height:auto!important;min-height:0!important;max-height:none!important;aspect-ratio:auto;margin:0;transition-property:border-color,box-shadow}#app[data-portrait-panel=true] .camera-box{margin-top:0}.forge-panel.panel-portrait-dock,.answers-column.panel-portrait-dock,.story-choices-column.panel-portrait-dock{position:absolute!important;right:auto!important;width:min(calc(100vw - 16px),440px)!important;height:auto!important;margin:0!important;gap:5px!important}.forge-panel.panel-portrait-dock .forge-header,.answers-column.panel-portrait-dock .arithmetic-question,.story-choices-column.panel-portrait-dock .choices-prompt.arithmetic-question{padding:4px 8px;margin:0;border-radius:10px}.forge-panel.panel-portrait-dock .forge-subtitle,.answers-column.panel-portrait-dock .question-subtext,.story-choices-column.panel-portrait-dock .question-subtext{display:none}.forge-panel.panel-portrait-dock .forge-cards-vertical{display:grid!important;grid-template-columns:repeat(4,minmax(0,1fr))!important;grid-template-rows:1fr!important;height:64px!important;gap:6px!important}.answers-column.panel-portrait-dock .answer-cards-list,.story-choices-column.panel-portrait-dock .story-equation-cards-vertical{display:grid!important;grid-template-columns:repeat(3,minmax(0,1fr))!important;grid-template-rows:1fr!important;height:64px!important;gap:6px!important}.forge-panel.panel-portrait-dock .forge-card,.answers-column.panel-portrait-dock .answer-card,.story-choices-column.panel-portrait-dock .story-equation-card{height:64px!important;min-height:64px!important;flex:none}.story-presentation-panel,.story-solving-bar{width:min(calc(100vw - 16px),440px);max-width:100%}}@media (min-height: 821px) and (min-width: 1367px){#app[data-mode=mode_b][data-phase=solved] .equation-area{height:240px;min-height:240px;max-height:240px;flex-basis:240px;justify-content:flex-start}}#app[data-mode=mode_b][data-phase=solved] .solved-panel{gap:clamp(4px,.7dvh,8px)}#app[data-mode=mode_b][data-phase=solved] .equation-history-container{height:clamp(28px,5dvh,52px);min-height:clamp(28px,5dvh,52px);max-height:clamp(28px,5dvh,52px);flex-basis:clamp(28px,5dvh,52px);margin-bottom:1px}#app[data-mode=mode_b][data-phase=solved] .equation-rail{min-height:clamp(58px,8dvh,76px)!important;padding:4px clamp(10px,2vw,24px)!important}#app[data-mode=mode_b][data-phase=solved] .solved-actions,#app[data-mode=mode_b][data-phase=solved] .open-palm-advance-badge{margin-top:0}@media (max-width: 768px) and (orientation: portrait){#app[data-portrait-panel=true]{--portrait-panel-space: 0px}#app[data-story-phase=choosing_equation] .story-presentation-panel{width:min(calc(100vw - 16px),620px)}.camera-box{align-self:flex-start;flex:0 0 auto!important;width:clamp(140px,min(48vw,calc((100dvh - 300px) * var(--camera-media-aspect, .75))),280px);max-width:calc(100vw - 130px);height:auto!important;min-height:0!important;max-height:none!important;aspect-ratio:auto;margin:0;border-radius:14px}.camera-box-header{min-height:31px;padding:3px 6px}.camera-header-right{display:none}.camera-title{font-size:10px}.camera-feed-container{flex:0 0 auto;width:100%;height:auto;aspect-ratio:var(--camera-media-aspect, .75);overflow:hidden}.camera-feed-container #webcam-video{object-fit:cover}.camera-placeholder{padding:10px 6px;gap:3px}.placeholder-icon{font-size:24px;margin-bottom:2px}.placeholder-title{font-size:12px}.placeholder-subtitle{font-size:9px;max-width:180px;line-height:1.25}#app[data-portrait-panel=true] .forge-panel.panel-portrait-dock,#app[data-portrait-panel=true] .answers-column.panel-portrait-dock,#app[data-portrait-panel=true] .story-choices-column.panel-portrait-dock{gap:5px!important;margin:0!important;overflow:visible}#app[data-portrait-panel=true] .forge-panel.panel-portrait-dock .forge-title,#app[data-portrait-panel=true] .answers-column.panel-portrait-dock .question-text,#app[data-portrait-panel=true] .story-choices-column.panel-portrait-dock .question-text{font-size:clamp(10px,3.1vw,13px);line-height:1.1}#app[data-portrait-panel=true] .forge-panel.panel-portrait-dock .forge-cards-vertical{display:grid!important;grid-template-columns:minmax(0,1fr)!important;grid-template-rows:repeat(4,minmax(0,1fr))!important;gap:5px!important}#app[data-portrait-panel=true] .answers-column.panel-portrait-dock .answer-cards-list,#app[data-portrait-panel=true] .story-choices-column.panel-portrait-dock .story-equation-cards-vertical{display:grid!important;grid-template-columns:minmax(0,1fr)!important;grid-template-rows:repeat(3,minmax(0,1fr))!important;gap:5px!important}#app[data-portrait-panel=true] .forge-panel.panel-portrait-dock .forge-card,#app[data-portrait-panel=true] .answers-column.panel-portrait-dock .answer-card,#app[data-portrait-panel=true] .story-choices-column.panel-portrait-dock .story-equation-card{width:100%!important;height:auto!important;min-height:0!important;padding:3px 4px;border-radius:10px}#app[data-portrait-panel=true] .forge-panel.panel-portrait-dock .forge-symbol{font-size:clamp(22px,7vw,30px)}#app[data-portrait-panel=true] .story-equation-card .choice-equation-display{gap:2px}#app[data-portrait-panel=true] .story-equation-card .choice-coeff-tile,#app[data-portrait-panel=true] .story-equation-card .term-tile,#app[data-portrait-panel=true] .story-equation-card .math-symbol{font-size:clamp(12px,4vw,17px)}#app[data-portrait-panel=true] .story-equation-card .math-item-token{width:clamp(22px,7vw,28px);height:clamp(22px,7vw,28px);min-width:clamp(22px,7vw,28px);min-height:clamp(22px,7vw,28px)}#app[data-mode=mode_b] .carried-bubble{width:82px;min-width:82px;max-width:82px;height:76px;padding:5px 7px;border-width:2px;box-sizing:border-box}#app[data-mode=mode_b] .carried-bubble .bubble-term{font-size:27px}#app[data-mode=mode_b] .carried-bubble .bubble-caption{max-width:68px;margin-top:2px;font-size:7px;line-height:1.1;text-align:center;white-space:normal}#app[data-mode=mode_b] .carried-bubble.double-charge,#app[data-mode=mode_b] .carried-bubble.double-charge .bubble-twin{width:62px;min-width:62px;height:62px}#app[data-mode=mode_b] .carried-bubble.double-charge .bubble-term,#app[data-mode=mode_b] .carried-bubble.double-charge .bubble-twin-term{font-size:23px}#app[data-mode=mode_b][data-phase=solved] .equation-area{height:clamp(168px,27dvh,220px);min-height:clamp(168px,27dvh,220px);max-height:clamp(168px,27dvh,220px);flex-basis:clamp(168px,27dvh,220px)}#app[data-mode=mode_b][data-phase=solved] .equation-history-container{display:none}#app[data-mode=mode_b][data-phase=solved] .solved-line-wrap{font-size:clamp(25px,8vw,34px)}#app[data-mode=mode_b][data-phase=solved] .solved-check{font-size:clamp(24px,7vw,32px)}#app[data-mode=mode_b][data-phase=solved] .open-palm-advance-badge{max-width:calc(100vw - 16px);padding:3px 8px}#app[data-mode=mode_b][data-phase=solved] .palm-text{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}}:root{--workspace-top-height: clamp(145px, 18dvh, 165px)}@media (max-height: 700px) and (orientation: landscape){:root{--workspace-top-height: 145px}}@media (max-width: 768px) and (orientation: portrait){:root{--workspace-top-height: 145px}#app[data-mode=mode_b][data-phase=solved] .equation-area{height:145px!important;min-height:145px!important;max-height:145px!important;flex:0 0 145px!important}.camera-overlay-controls{top:5px;right:5px}}#app[data-story-phase=solving] .workspace-top .equation-area,#app[data-story-phase=solving] .workspace-top .equation-history-container{height:auto!important;min-height:0!important;max-height:none!important;flex:1 1 0!important}#app[data-story-phase=reading] .story-presentation-panel,#app[data-story-phase=choosing_equation] .story-presentation-panel{width:min(680px,calc(100vw - max(32px,8vw)))}#app:not(.layout-portrait)[data-story-phase=reading] .story-presentation-panel,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-presentation-panel{width:max-content;min-width:min(360px,calc(100vw - max(32px,8vw)));max-width:min(520px,calc(100vw - max(32px,8vw)))}#app:not(.layout-portrait)[data-story-phase=reading] .workspace-top .story-area,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .workspace-top .story-area,#app:not(.layout-portrait)[data-story-phase=reading] .story-presentation-panel,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-presentation-panel,#app:not(.layout-portrait)[data-story-phase=reading] .story-card,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-card{height:100%}#app:not(.layout-portrait)[data-story-phase=reading] .story-card,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-card{display:flex;flex-direction:column;justify-content:center;padding-block:clamp(7px,1dvh,9px)}#app:not(.layout-portrait)[data-story-phase=reading] .story-card-header,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-card-header{margin-bottom:clamp(2px,.45dvh,4px);padding-bottom:clamp(2px,.45dvh,4px)}#app:not(.layout-portrait)[data-story-phase=reading] .story-card-title,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-card-title{font-size:clamp(.9rem,1.9dvh,1.05rem)}#app:not(.layout-portrait)[data-story-phase=reading] .story-beats-container,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-beats-container{gap:clamp(2px,.4dvh,3px)}#app:not(.layout-portrait)[data-story-phase=reading] .story-sentence,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-sentence{font-size:clamp(.95rem,2dvh,1.15rem);line-height:1.2}#app:not(.layout-portrait)[data-story-phase=reading] .story-sentence.story-question-beat,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-sentence.story-question-beat{font-size:clamp(1rem,2.1dvh,1.2rem)}#app:not(.layout-portrait)[data-story-phase=reading] .story-inline-icon .story-text-icon.math-item-token,#app:not(.layout-portrait)[data-story-phase=choosing_equation] .story-inline-icon .story-text-icon.math-item-token{width:clamp(28px,3.4dvh,34px)!important;height:clamp(28px,3.4dvh,34px)!important;min-width:clamp(28px,3.4dvh,34px)!important;min-height:clamp(28px,3.4dvh,34px)!important}#app[data-story-phase=reading] .story-card,#app[data-story-phase=choosing_equation] .story-card{padding:6px 14px}#app[data-story-phase=reading] .story-card-header,#app[data-story-phase=choosing_equation] .story-card-header{gap:5px;margin-bottom:2px;padding-bottom:3px}#app[data-story-phase=reading] .story-card-icon,#app[data-story-phase=choosing_equation] .story-card-icon{font-size:.95rem}#app[data-story-phase=reading] .story-card-title,#app[data-story-phase=choosing_equation] .story-card-title{font-size:.8rem}#app[data-story-phase=reading] .story-beats-container,#app[data-story-phase=choosing_equation] .story-beats-container{min-height:0;gap:2px}#app[data-story-phase=reading] .story-sentence,#app[data-story-phase=choosing_equation] .story-sentence{font-size:clamp(.82rem,1.7dvh,1rem);line-height:1.2}#app[data-story-phase=reading] .story-sentence.story-question-beat,#app[data-story-phase=choosing_equation] .story-sentence.story-question-beat{margin-top:0;padding-top:1px;font-size:clamp(.86rem,1.8dvh,1.04rem)}#app[data-story-phase=reading] .story-inline-icon .story-text-icon.math-item-token,#app[data-story-phase=choosing_equation] .story-inline-icon .story-text-icon.math-item-token{width:clamp(24px,3dvh,30px)!important;height:clamp(24px,3dvh,30px)!important;min-width:clamp(24px,3dvh,30px)!important;min-height:clamp(24px,3dvh,30px)!important}#app[data-mode=mode_b]:not(.layout-portrait) .camera-box{align-self:center;flex:0 0 auto!important;width:var(--mode-b-camera-width, min( calc(100vw - 580px) , 1100px));height:auto!important;min-height:0!important;max-width:none;max-height:none!important;aspect-ratio:var(--mode-b-camera-aspect, 4 / 3);transform:translate(var(--mode-b-camera-offset, 0px));transition-property:border-color,box-shadow}#app[data-mode=mode_b][data-camera-active=true]:not(.layout-portrait) .equation-rail.mode-b-rail{width:var(--mode-b-equation-width, var(--mode-b-camera-width, min( calc(100vw - 580px) , 1100px)));max-width:none;transform:translate(var(--mode-b-equation-offset, var(--mode-b-camera-offset, 0px)))}#app[data-mode=mode_b][data-camera-active=true]:not(.layout-portrait) .story-solving-bar{transform:translate(var(--mode-b-equation-offset, var(--mode-b-camera-offset, 0px)))}@media (max-height: 700px) and (orientation: landscape){#app[data-mode=mode_b][data-camera-active=true]:not(.layout-portrait) .equation-rail.mode-b-rail,#app[data-mode=mode_b][data-camera-active=true]:not(.layout-portrait) .equation-rail.mode-b-rail .math-symbol,#app[data-mode=mode_b][data-camera-active=true]:not(.layout-portrait) .equation-rail.mode-b-rail .term-tile{font-size:clamp(20px,5.2dvh,58px)}#app[data-mode=mode_b][data-camera-active=true]:not(.layout-portrait) .equation-rail.mode-b-rail .term-tile{min-width:clamp(34px,7dvh,80px);min-height:clamp(36px,7.5dvh,82px)}#app[data-mode=mode_b][data-camera-active=true]:not(.layout-portrait) .equation-rail .math-item-token{width:clamp(30px,7dvh,68px);height:clamp(30px,7dvh,68px);min-width:clamp(30px,7dvh,68px);min-height:clamp(30px,7dvh,68px)}#app[data-mode=mode_b][data-camera-active=true]:not(.layout-portrait) .equation-rail .term-tile .math-item-token{width:clamp(28px,6dvh,58px);height:clamp(28px,6dvh,58px);min-width:clamp(28px,6dvh,58px);min-height:clamp(28px,6dvh,58px)}}@media (max-width: 768px) and (orientation: portrait){#app[data-portrait-panel=true] .story-equation-card .choice-equation-expr{gap:clamp(2px,.8vw,5px);font-size:clamp(16px,4.2vw,28px)}#app[data-portrait-panel=true] .story-equation-card .choice-coeff-tile,#app[data-portrait-panel=true] .story-equation-card .choice-modifier-tile,#app[data-portrait-panel=true] .story-equation-card .term-tile,#app[data-portrait-panel=true] .story-equation-card .math-symbol,#app[data-portrait-panel=true] .story-equation-card .choice-equals,#app[data-portrait-panel=true] .story-equation-card .choice-rhs{font-size:clamp(16px,4.2vw,28px)}#app[data-portrait-panel=true] .story-equation-card .choice-coeff-tile,#app[data-portrait-panel=true] .story-equation-card .choice-modifier-tile,#app[data-portrait-panel=true] .story-equation-card .term-tile{padding:2px clamp(4px,1.1vw,7px)}#app[data-portrait-panel=true] .story-equation-card .math-item-token{width:clamp(28px,6.5vw,44px);height:clamp(28px,6.5vw,44px);min-width:clamp(28px,6.5vw,44px);min-height:clamp(28px,6.5vw,44px)}}@media (max-width: 768px) and (orientation: portrait) and (max-aspect-ratio: 1 / 2){:root{--workspace-top-height: clamp(230px, 18dvh, 270px)}#app[data-story-phase=reading] .story-card,#app[data-story-phase=choosing_equation] .story-card{padding-block:10px}#app[data-story-phase=reading] .story-card-header,#app[data-story-phase=choosing_equation] .story-card-header{margin-bottom:5px;padding-bottom:5px}#app[data-story-phase=reading] .story-beats-container,#app[data-story-phase=choosing_equation] .story-beats-container{gap:4px}#app[data-story-phase=reading] .story-sentence,#app[data-story-phase=choosing_equation] .story-sentence{line-height:1.28}}@media (max-width: 768px) and (orientation: portrait){#app[data-camera-dock=right] .camera-box{align-self:flex-end}#app[data-camera-dock=left] .camera-box{align-self:flex-start}.equation-rail,.equation-rail.mode-b-rail,.equation-rail.mode-d-rail{width:calc(100vw - 16px)!important;min-width:0!important;max-width:calc(100vw - 16px)!important;transform-origin:center center}#app[data-mode=mode_b] .equation-rail.mode-b-rail{justify-content:center;gap:clamp(5px,1.5vw,10px)!important;padding-inline:6px!important}#app[data-mode=mode_b] .equation-rail.mode-b-rail .equation-side{flex:0 1 auto!important;width:auto;gap:clamp(4px,1.2vw,8px)}#app[data-mode=mode_b] .equation-rail.mode-b-rail .symbol-equals{margin-inline:clamp(2px,.8vw,5px)}#app[data-mode=mode_b] .mode-b-cleanup-preview,#app[data-mode=mode_b] .mode-b-cleanup-target,#app[data-mode=mode_b] .mode-b-solve-target{min-width:0;min-height:clamp(48px,8dvh,62px);padding:4px clamp(6px,1.5vw,10px);gap:clamp(4px,1vw,7px);font-size:clamp(24px,7vw,36px)}#app[data-mode=mode_b] .mode-b-rhs-operation{padding:4px clamp(6px,1.5vw,10px);gap:4px}#app[data-mode=mode_b] .mode-b-rhs-operation .math-symbol{font-size:clamp(24px,7vw,36px)!important}.blaster-panel.panel-portrait-dock,.inverse-panel.panel-portrait-dock{position:absolute!important;margin:0!important}#app[data-portrait-panel=true] .blaster-panel.panel-portrait-dock .blaster-cards-vertical,#app[data-portrait-panel=true] .inverse-panel.panel-portrait-dock .inverse-cards-list{display:grid!important;grid-template-columns:minmax(0,1fr)!important;gap:5px!important}}