/* Mobile-first learning shell. Only each active screen owns the available viewport. */
[hidden]{display:none!important}
html,body{height:100%;min-height:0;overflow:hidden!important}
body{--learning-backdrop:url('./assets/backgrounds/bg-arithmetic.png');display:grid;grid-template-rows:52px minmax(0,1fr);font-weight:600;background:#090d28}
button,summary{touch-action:manipulation}
button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #ffe38a;outline-offset:2px}
button:disabled{cursor:default;opacity:.5;transform:none}
.arena-header{position:relative;z-index:60;display:flex;align-items:center;gap:14px;padding:4px max(12px,env(safe-area-inset-right)) 4px max(12px,env(safe-area-inset-left));border-bottom:1px solid #426282;background:#080e26}
#arenaHome{border:0;box-shadow:none;padding:4px;background:none;color:#92eeff;white-space:nowrap;font-size:22px;min-height:44px}
#arenaHome span{font-size:16px;color:#fff;margin-left:6px}
#saveStatus{font-size:11px;color:#abc6d9;margin-left:auto}
#arenaMenu{margin-left:auto;font-size:12px}
#arenaMenu summary{cursor:pointer;min-height:44px;display:flex;align-items:center;padding:8px;border:1px solid #557796;border-radius:10px;white-space:nowrap}
#arenaMenuBody{position:absolute;right:8px;top:52px;width:min(330px,calc(100vw - 16px));max-height:calc(100dvh - 65px);overflow:auto;padding:16px;background:#0d1833;border:1px solid #80e6ff;border-radius:16px;box-shadow:0 16px 45px #000b}
#arenaMenu:not([open]) #arenaMenuBody{display:none}
#arenaMenuBody label{display:grid;grid-template-columns:60px 1fr;align-items:center;gap:8px;margin-bottom:12px}
#arenaMenuBody input{min-height:44px;accent-color:#7ee5f4;width:100%}
#arenaMenuBody button{width:100%;margin:4px 0!important}
#songTitle{font-size:12px;color:#b8d6e6}
body:not([data-view='sprint'])>.game-shell{display:none}
.academy-home{min-height:0;overflow:auto;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(340px,.9fr);gap:24px;padding:clamp(12px,3vw,40px);background:linear-gradient(100deg,#061025e8,#0b1438b8),url('./assets/backgrounds/bg-arithmetic.png') center/cover}
.welcome-panel,.chapter-panel{min-width:0;align-self:start}
.eyebrow{color:#8feeff;text-transform:uppercase;letter-spacing:1.5px;font-size:11px;font-weight:800;margin:0 0 8px}
.welcome-panel h1{font-size:clamp(32px,4.8vw,70px);line-height:1.02;letter-spacing:-2px;margin:10px 0 16px}
.welcome-panel h1 span{color:#ffe38a}
.welcome-panel>p:not(.eyebrow){max-width:540px;line-height:1.55;color:#d2e1ee}
.welcome-characters{display:flex;align-items:center;justify-content:center;height:clamp(110px,22vh,235px);gap:12px}
.welcome-characters img{width:150px;height:100%;object-fit:contain;filter:drop-shadow(0 8px 20px #28c5ff55);animation:breathing 3s ease-in-out infinite}
.welcome-characters .bot-floating{width:120px;animation:float-bot 3.8s ease-in-out infinite}
.mode-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-width:560px}
.mode-actions button{font-size:16px;min-height:56px;background:#172b49}
.mode-actions .primary{grid-column:1/-1;background:linear-gradient(135deg,#efd078,#ffc48c);color:#131c2f;border:0;font-size:18px}
.mode-actions #sprintStart{font-size:13px}
.mode-note{font-size:12px}
.chapter-panel{border:1px solid #527b9b;border-radius:22px;background:#07152cdd;padding:20px}
.chapter-heading{display:flex;justify-content:space-between;gap:8px;align-items:center}
.chapter-heading h2{font-size:23px;margin:0 0 14px}
.chapter-heading>b{font-size:14px;white-space:nowrap;color:#ffe38a}
.practice-toggle{display:flex;align-items:center;gap:10px;min-height:44px;font-size:12px;color:#cde3ed}
.practice-toggle input{width:22px;height:22px;accent-color:#60e0e6}
.mission-list{display:grid;gap:7px;margin:10px 0}
.mission-choice{display:grid;grid-template-columns:36px 1fr auto;align-items:center;gap:12px;text-align:left;background:#12243d;box-shadow:none;padding:9px 12px;min-height:60px;border-radius:12px}
.mission-number{color:#89e5f4;font-size:18px}
.mission-label strong,.mission-label small{display:block}.mission-label strong{font-size:14px}.mission-label small{font-size:11px;color:#bfd2e3;margin-top:3px}
.mission-result{font-size:11px;color:#ffe38a}.curriculum-note{font-size:12px;line-height:1.6;color:#c6dce9}.curriculum-note summary{padding:10px 0;cursor:pointer;min-height:44px}
.learning-play{min-height:0;min-width:0;display:grid;grid-template-rows:auto auto minmax(0,1fr) auto;gap:10px;padding:12px max(16px,env(safe-area-inset-right)) max(10px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left));background:linear-gradient(#060d22d9,#08132fe8),var(--learning-backdrop) center/cover}
.mission-bar{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;align-items:center;color:#b0d9e7;font-size:12px}.mission-bar strong{color:#fff;font-size:16px}.mission-bar progress{width:100%;grid-column:1/-1;height:5px;accent-color:#6eedc6}
.learning-question h1{font-size:clamp(22px,2.8vw,40px);line-height:1.18;max-width:1100px;margin:5px 0 8px;outline:none}
.learning-question small{font-size:11px;color:#8feeff;text-transform:uppercase;letter-spacing:1px}
.learning-question p{font-size:13px;color:#c7d9e6;margin:0;line-height:1.45}
.problem-grid{min-height:0;display:grid;grid-template-columns:minmax(0,1fr) minmax(270px,.65fr);gap:18px;max-width:1250px;width:100%;margin:auto;height:100%}
.visual-panel,.response-panel{min-height:0;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:auto;border:1px solid #436988;border-radius:20px;padding:18px;background:#0a1c35e8}
.coach{display:flex;align-items:center;justify-content:center;gap:10px;max-width:360px;color:#b3e9f2;font-size:13px;margin-bottom:20px}
.coach img{width:70px;height:85px;object-fit:contain;animation:float-bot 3.5s ease-in-out infinite}
#visualContent{width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center}
#visualContent p{color:#c6dce9;font-size:14px;margin:4px 0}#visualContent svg{width:100%;max-width:480px;max-height:160px}
.response-panel{background:#102643ed;overflow:auto;justify-content:center;gap:10px}
.entry-label{font-size:12px;color:#cee3ed}.entry-value{width:100%;max-width:350px;display:block;min-height:48px;padding:6px 12px;line-height:1.1;font-size:36px;text-align:center;letter-spacing:1px;border-radius:12px;border:1px solid #679fb7;background:#06152a;color:#ffe6a1;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.number-pad{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;width:100%;max-width:350px}.number-pad button{min-height:48px;font-size:23px;border-radius:12px;background:#173d5b;box-shadow:none;padding:4px}
.learning-feedback{border-radius:16px;background:#08192e;border:1px solid #527b97;padding:10px 14px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px;min-height:76px}
#feedbackText{line-height:1.45;font-size:14px;margin:0;max-height:100px;overflow:auto}.learning-actions{display:flex;gap:8px}.learning-actions button{min-height:48px;min-width:130px}
.learning-feedback[data-result='correct']{border-color:#6aedb0}.learning-feedback[data-result='correct'] #feedbackText{color:#b1ffdc}
.place-grid{width:100%;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.place-column{display:grid;gap:8px;text-align:center}.place-column small{font-size:10px;color:#c9e5f0}.place-column strong{font-size:36px;color:#ffe38a}.place-column button{min-width:44px;min-height:44px;font-size:24px;padding:2px;border-radius:10px;background:#214762}
.value-bands{width:min(300px,100%);display:grid;gap:8px}.value-bands div{display:flex;justify-content:space-between;border-bottom:1px solid #40647e;padding:8px;gap:8px}.value-bands span{color:#c5e8ef}.value-bands b{color:#ffe38a}
.fraction-panel>p{font-size:14px;margin:0;line-height:1.4;text-align:center}.fraction-parts{width:100%;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px}.fraction-parts button{padding:4px;min-width:44px;min-height:60px;border-radius:10px;background:#153550;font-size:18px}.fraction-parts button[aria-pressed='true']{background:#69e4ce;color:#08152d;border:2px solid #c7fff0}.fraction-target{display:grid;font-size:70px;line-height:1.1;color:#ffe38a}.fraction-target span:first-child{border-bottom:4px solid #ffe38a}
.array-diagram{display:grid;grid-template-columns:repeat(var(--columns),minmax(0,1fr));gap:6px;width:min(360px,100%)}.array-diagram i{aspect-ratio:1;display:block;background:#67e4d1;border-radius:3px;box-shadow:0 0 8px #67e4d133}.array-diagram span{grid-column:1/-1;color:#b4f8e9}
.generator-groups{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.generator-groups span{display:grid;place-items:center;width:44px;height:50px;border-radius:10px;border:2px solid #7fe4f4;font-size:28px;background:#173b55}
.pattern-diagram{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.pattern-diagram span{padding:8px;border:1px solid #80def4;border-radius:10px;font-size:23px;background:#173b55}
.column-calculation{display:grid;text-align:right;font-variant-numeric:tabular-nums;font-size:clamp(28px,4vw,54px);letter-spacing:8px;width:fit-content}.column-calculation span:nth-child(2){border-bottom:2px solid #ffe38a;padding-bottom:4px}.column-calculation strong{color:#ffe38a}
.rectangle-diagram{width:70%;max-width:310px;height:140px;position:relative;border:4px solid #82efd0;margin:20px}.rectangle-diagram span{position:absolute;top:-28px;left:40%}.rectangle-diagram b{position:absolute;right:-45px;top:40%;white-space:nowrap;font-weight:600}.money-symbol{display:grid;place-items:center;width:120px;height:120px;border:4px solid #ffe38a;border-radius:50%;font-size:70px;color:#ffe38a;background:#51401c88}
.solved .coach img{animation:celebrate-bot .8s ease-in-out infinite}
.learning-summary{min-height:0;overflow:auto;display:grid;place-items:center;padding:20px;background:linear-gradient(#06112ad9,#101038f0),var(--learning-backdrop) center/cover}.summary-card{max-width:650px;text-align:center;border:1px solid #7bd6e8;background:#08172ee8;padding:24px;border-radius:24px}.summary-card>img{height:130px;max-width:100%;object-fit:contain;animation:float-bot 3s ease-in-out infinite}.summary-card h1{color:#ffe38a;font-size:clamp(28px,5vw,42px);margin:10px 0}.summary-card p{line-height:1.5;color:#d2e7ee}.summary-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.summary-actions button{min-height:48px}
/* Sprint retains all five worlds while using a compact, reachable play layout. */
body[data-view='sprint'] .game-shell{height:100%;max-height:100%;min-height:0;grid-template-rows:auto minmax(0,1fr)}
body[data-view='sprint'] .brand{display:none}body[data-view='sprint'] .topbar{padding:5px 12px;display:block}body[data-view='sprint'] .hud{width:100%;grid-template-columns:repeat(5,1fr);gap:5px}body[data-view='sprint'] .hud div{padding:4px 8px;border-radius:8px}body[data-view='sprint'] .hud b{font-size:16px}body[data-view='sprint'] .hud small{font-size:9px}
body[data-view='sprint'] .main-layout{min-height:0;grid-template-columns:230px minmax(0,1fr);gap:8px;padding:8px}body[data-view='sprint'] .side-panel{grid-template-columns:1fr;grid-template-rows:auto auto minmax(0,1fr);overflow:auto}body[data-view='sprint'] .gate-list{grid-template-columns:1fr;max-height:none}body[data-view='sprint'] .panel p{font-size:12px}body[data-view='sprint'] .panel h2{font-size:20px}body[data-view='sprint'] .canvas-wrap{height:100%;min-height:0;border-radius:18px}body[data-view='sprint'] .answer-pad button{min-height:48px;border-radius:12px}body[data-view='sprint'] .bottombar{display:flex;gap:5px}body[data-view='sprint'] .bottombar button{flex:1 1 70px;font-size:11px;min-height:44px;padding:5px}body[data-view='sprint'] .overlay{padding:10px;overflow:auto;align-items:start}body[data-view='sprint'] .overlay-card{max-height:100%;padding:16px;margin:auto}body[data-view='sprint'] .overlay-card h1{font-size:clamp(24px,4vw,56px)}body[data-view='sprint'] .overlay-card h2{font-size:24px}.overlay-card .hero-badge{width:64px;height:64px;font-size:38px}.overlay-card p{font-size:13px}.overlay-tags{margin:10px 0}.overlay-tags span{font-size:11px;padding:5px}.overlay-actions button{min-height:44px}
@keyframes breathing{50%{transform:translateY(-4px) scale(1.015)}}@keyframes float-bot{50%{transform:translateY(-8px) rotate(2deg)}}@keyframes celebrate-bot{50%{transform:translateY(-6px) rotate(-6deg)}}
@media(max-width:900px){.academy-home{grid-template-columns:1fr;padding:16px;gap:16px}.welcome-panel h1{font-size:40px;margin:5px 0 10px}.welcome-panel>p:not(.eyebrow){font-size:14px;margin:6px 0}.welcome-characters{position:absolute;right:18px;top:112px;height:100px;opacity:.8;pointer-events:none}.welcome-characters img{width:65px}.welcome-characters .bot-floating{width:60px}.welcome-panel h1{padding-right:115px}.welcome-panel>p:not(.eyebrow){max-width:100%}.mode-actions{max-width:none;margin-top:12px}.chapter-panel{padding:14px}.problem-grid{gap:10px;grid-template-columns:minmax(0,1fr) minmax(250px,.85fr)}.visual-panel,.response-panel{padding:12px}.learning-feedback{grid-template-columns:1fr;gap:6px;padding:8px 10px}.learning-actions{justify-content:flex-end}.learning-actions button{min-height:44px}.coach{margin-bottom:8px}.coach img{width:50px;height:58px}.coach span{font-size:11px}body[data-view='sprint'] .main-layout{grid-template-columns:1fr}body[data-view='sprint'] .side-panel{display:none}}
@media(max-width:600px){body{grid-template-rows:46px minmax(0,1fr)}.arena-header{gap:6px;padding:1px 8px}#arenaHome{font-size:19px}#arenaHome span{font-size:12px;margin-left:2px}#saveStatus{position:absolute;top:48px;right:12px;z-index:2;font-size:9px;pointer-events:none;background:#08172ed9;border-radius:4px;padding:2px 5px}#arenaMenu summary{font-size:11px;padding:5px}#arenaMenuBody{top:46px}.academy-home{padding-top:24px}.welcome-panel h1{font-size:32px;letter-spacing:-1px}.welcome-panel>p:not(.eyebrow){font-size:12px}.welcome-characters{top:108px;height:80px;right:12px}.mode-actions{gap:7px}.mode-actions button{min-height:48px;font-size:14px}.mode-actions .primary{min-height:50px;font-size:16px}.mode-actions #sprintStart{font-size:11px}.chapter-heading h2{font-size:19px}.learning-play{padding:20px 8px max(6px,env(safe-area-inset-bottom));gap:6px}.mission-bar{gap:4px;font-size:10px}.mission-bar strong{font-size:12px}.mission-bar progress{height:4px}.learning-question h1{font-size:21px;margin:4px 0;line-height:1.15}.learning-question small{font-size:9px;letter-spacing:.5px}.learning-question p{display:none}.problem-grid{grid-template-columns:1fr;grid-template-rows:minmax(40px,.7fr) minmax(175px,1.6fr);gap:6px}.visual-panel{padding:5px;border-radius:12px;overflow:hidden}.coach{display:none}#visualContent{gap:3px;max-height:100%}#visualContent p{font-size:10px}.value-bands{display:flex;width:100%;gap:7px;justify-content:center}.value-bands div{display:grid;gap:3px;padding:3px;border:0;font-size:11px}.value-bands span{font-size:9px}#visualContent svg{max-height:70px}.response-panel{padding:6px 10px;gap:4px;border-radius:12px}.entry-label{font-size:10px}.entry-value{font-size:29px;min-height:36px;padding:2px 8px}.number-pad{gap:5px;max-width:400px}.number-pad button{min-height:44px;font-size:22px}.learning-feedback{min-height:0;padding:7px 9px;border-radius:12px}#feedbackText{font-size:12px;line-height:1.3;max-height:62px}.learning-actions{gap:6px}.learning-actions button{min-width:0;flex:1;font-size:12px;padding:4px;min-height:44px}.place-grid{gap:6px}.place-column{gap:3px}.place-column strong{font-size:27px}.place-column small{font-size:9px}.place-column button{min-height:44px}.fraction-parts{gap:5px;max-width:400px}.fraction-parts button{min-height:48px}.fraction-panel>p{font-size:12px}.fraction-target{font-size:26px;line-height:1}.fraction-target span:first-child{border-bottom-width:2px}.array-diagram{max-width:230px;gap:3px}.array-diagram i{max-height:8px;min-height:2px}.array-diagram span{font-size:10px}.generator-groups{gap:4px}.generator-groups span{width:28px;height:30px;font-size:18px;border-width:1px}#visualContent>b{font-size:11px}.pattern-diagram{gap:4px}.pattern-diagram span{font-size:14px;padding:5px}.column-calculation{font-size:17px;letter-spacing:5px}.rectangle-diagram{height:30px;max-width:140px;border-width:2px;margin:16px}.rectangle-diagram span{top:-15px;font-size:10px}.rectangle-diagram b{font-size:10px;right:-28px;top:10%}.money-symbol{width:36px;height:36px;border-width:2px;font-size:22px}.summary-card{padding:18px}.summary-card>img{height:80px}.summary-card p{font-size:13px}body[data-view='sprint'] .main-layout{padding:5px;gap:5px}body[data-view='sprint'] .arena-column{gap:5px}body[data-view='sprint'] .answer-pad{grid-template-columns:repeat(2,1fr);gap:5px}body[data-view='sprint'] .answer-pad button{min-height:44px;font-size:24px}body[data-view='sprint'] .bottombar button{flex-basis:28%;min-height:44px}body[data-view='sprint'] .question-pop{top:8px;padding:8px;border-radius:12px}body[data-view='sprint'] .question-pop strong{font-size:clamp(18px,5.5vw,32px);line-height:1.15}body[data-view='sprint'] .question-pop span,body[data-view='sprint'] .question-pop em{font-size:9px}body[data-view='sprint'] .hero-badge,body[data-view='sprint'] .overlay-card h2,body[data-view='sprint'] .overlay-tags{display:none}body[data-view='sprint'] .overlay-card p{font-size:12px;margin:10px auto}body[data-view='sprint'] .overlay-card h1{font-size:26px}}
@media(orientation:landscape) and (max-height:560px){body{grid-template-rows:44px minmax(0,1fr)}#saveStatus{display:none}.arena-header{padding:0 10px}#arenaMenuBody{top:44px}.academy-home{grid-template-columns:1fr 1fr;padding:12px;gap:16px}.welcome-panel h1{font-size:28px;padding:0}.welcome-characters{display:none}.welcome-panel>p:not(.eyebrow){font-size:11px}.mode-actions button,.mode-actions .primary{min-height:44px;font-size:13px}.mode-note{font-size:10px}.learning-play{padding:5px 10px;gap:4px}.mission-bar{font-size:10px;gap:3px}.mission-bar strong{font-size:12px}.learning-question h1{font-size:19px;margin:2px 0}.learning-question small{font-size:9px}.learning-question p{display:none}.problem-grid{grid-template-columns:minmax(0,1fr) minmax(230px,.8fr);grid-template-rows:minmax(0,1fr);gap:8px}.coach{display:none}.visual-panel,.response-panel{padding:5px 8px;gap:4px;border-radius:12px}.number-pad{gap:3px;max-width:320px}.number-pad button{min-height:44px;font-size:19px;padding:2px}.entry-value{min-height:28px;font-size:24px;padding:1px}.entry-label{display:none}.learning-feedback{grid-template-columns:1fr auto;gap:8px;padding:5px 8px;min-height:50px}#feedbackText{font-size:11px;max-height:47px}.learning-actions button{font-size:11px;min-width:105px;min-height:44px}.place-column{gap:2px}.place-column strong{font-size:22px}.place-column small{font-size:9px}.place-column button{min-height:44px;font-size:20px}.fraction-parts button{min-height:44px}.fraction-panel>p{font-size:11px}.value-bands{gap:3px}.value-bands div{padding:4px;font-size:12px}#visualContent svg{max-height:90px}.array-diagram{max-width:220px;gap:3px}.array-diagram i{max-height:10px}.column-calculation{font-size:25px}.money-symbol{width:60px;height:60px;font-size:38px}.fraction-target{font-size:37px}.rectangle-diagram{height:55px;margin:20px}.summary-card{padding:12px}.summary-card>img{display:none}.summary-card h1{font-size:27px}.summary-card p{font-size:12px}body[data-view='sprint'] .topbar{display:none}body[data-view='sprint'] .game-shell{grid-template-rows:minmax(0,1fr)}body[data-view='sprint'] .answer-pad{grid-template-columns:repeat(4,1fr)}body[data-view='sprint'] .bottombar{flex-wrap:nowrap}body[data-view='sprint'] .question-pop strong{font-size:23px}body[data-view='sprint'] .overlay-card h1{font-size:26px}body[data-view='sprint'] .overlay-card h2,body[data-view='sprint'] .hero-badge,body[data-view='sprint'] .overlay-tags{display:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

@media(max-width:600px){.place-panel>.entry-label{display:none}.place-panel>.entry-value{min-height:30px;font-size:26px}.visual-panel{position:relative}.visual-panel .coach{display:block;position:absolute;right:5px;top:4px;margin:0;pointer-events:none}.visual-panel .coach span{display:none}.visual-panel .coach img{width:28px;height:34px}.value-bands{padding-right:20px}}

@media(max-width:600px) and (min-height:720px){.learning-question p{display:block;font-size:11px;max-height:40px;overflow:auto;line-height:1.3}}

@media(max-width:600px) and (orientation:portrait){.problem-grid{grid-template-rows:minmax(20px,.7fr) minmax(200px,1.6fr)}.response-panel>.entry-label{display:none}body[data-view='sprint'] #saveStatus{display:none}body[data-view='sprint'] .toast{font-size:12px;max-height:80px;overflow:auto}}
/* Short phone landscape keeps the prompt beside the keypad, leaving 44px touch targets. */
@media(orientation:landscape) and (max-height:360px){
 .learning-play{grid-template-columns:minmax(0,1fr) minmax(250px,.8fr);grid-template-rows:28px minmax(0,1fr) 54px;gap:4px 8px;padding:5px 10px}
 .mission-bar{grid-column:1/-1;grid-row:1;gap:2px}.mission-bar progress{height:4px}
 .learning-question{grid-column:1;grid-row:2;align-self:start;z-index:1;min-width:0;padding:5px 0}.learning-question h1{font-size:17px;line-height:1.18}.learning-question small{font-size:9px}
 .problem-grid{grid-column:1/-1;grid-row:2;grid-template-columns:minmax(0,1fr) minmax(250px,.8fr);height:100%;gap:8px}
 .problem-grid .visual-panel{display:none}.response-panel{grid-column:2;padding:3px 6px;gap:3px}.entry-value{min-height:24px;font-size:21px}.number-pad{gap:3px}.number-pad button{min-height:44px;font-size:18px}.place-column{gap:2px}.place-column strong{font-size:22px}.place-panel>.entry-label{display:none}.fraction-panel>p{font-size:10px}.fraction-parts{gap:3px}.fraction-parts button{min-height:44px;min-width:0}
 .learning-feedback{grid-column:1/-1;grid-row:3;min-height:0;padding:4px 7px}.learning-actions button{min-width:90px;font-size:10px}#feedbackText{max-height:44px;font-size:10px}
}

.visual-panel{container-type:size}
.visual-panel #visualContent svg{max-height:calc(100cqh - 10px)}
@container(max-height:70px){.visual-panel .coach{display:none!important}}
@container(max-height:55px){#visualContent .money-symbol,#visualContent .generator-groups,#visualContent .array-diagram{display:none}#visualContent .rectangle-diagram{height:20px;margin:12px}#visualContent p{font-size:10px;margin:0}}
/* Grade 4 workshop tools: equal-sized cells, mathematical scales and readable touch targets. */
.mode-actions #sprintStart{grid-column:1/-1;min-height:44px}.mode-actions #reviewStart{background:#16413f}
.tool-panel{gap:7px}.tool-status{font-size:12px;line-height:1.25;color:#d8f7ef;text-align:center;min-height:24px;max-height:32px;overflow:auto;margin:0}
.shape-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;width:100%;max-width:380px}.shape-options button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:90px;font-size:13px;padding:5px}.shape-options svg{width:60px;height:45px}.shape-options button[aria-pressed='true']{background:#246c62;border:2px solid #c0fff1}
.mirror-grid{display:grid;grid-template-columns:repeat(4,minmax(44px,1fr));grid-auto-rows:48px;gap:4px;width:100%;max-width:310px}.mirror-cell{display:grid;place-items:center;border:1px solid #87c8db;border-radius:6px;background:#112c45;font-size:24px;min-height:44px;padding:0!important;color:transparent;box-shadow:none}.mirror-cell:nth-child(4n+2){border-right:3px dashed #ffe38a;border-top-right-radius:0;border-bottom-right-radius:0}.mirror-cell.given[data-lit='true']{background:#c6aa51;color:#fff6c9}.mirror-cell[aria-pressed='true']{background:#38b5a2;color:#d3fff4}.mirror-cell.given{font-size:20px}
.tile-grid{display:grid;grid-template-columns:repeat(var(--tile-columns),minmax(44px,1fr));gap:4px;width:100%;max-width:350px}.tile-grid button{min-height:48px;padding:0;font-size:24px;border:1px solid #7ac6de;border-radius:4px;background:#133753}.tile-grid button[aria-pressed='true']{background:#6ee5c9;color:#07362f}.unit-tile{border:2px solid #83e3d3;padding:18px;color:#d7fff5;border-radius:4px}
.tally-counters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;width:100%;max-width:350px}.tally-column{display:grid;gap:3px;text-align:center;align-items:center}.tally-column small{font-size:11px;line-height:1.2;color:#c5e9f1}.tally-column button{min-height:44px;padding:2px;font-size:24px}.tally-column strong{font-size:24px;line-height:1}.tally-marks{height:25px}.tally-marks svg{width:100%;height:100%}
.survey-items{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:5px;padding:0;margin:0;width:min(280px,100%);list-style:none}.survey-items li{display:grid;place-items:center}.survey-items svg{width:36px;height:30px}
.mass-load{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;font-size:clamp(20px,3vw,40px)}.mass-load span{display:grid;place-items:center;min-height:65px;padding:8px;border:2px solid #73d9e0;border-radius:12px;background:#143c56;white-space:nowrap}.mass-load b{font-size:25px}
.clock-pair{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;height:min(200px,calc(100cqh - 8px))}.clock-unit{min-width:0;height:100%;flex:1;display:grid;grid-template-rows:minmax(0,1fr) 22px;text-align:center}.clock-unit svg{width:100%;height:100%;max-height:100%!important}.clock-unit b{font-size:15px;line-height:22px;color:#ffe38a}.clock-pair>span{font-size:24px;color:#c4f8f0}
.bar-chart{width:100%;height:min(215px,calc(100cqh - 28px));display:grid;grid-template-columns:25px minmax(0,1fr);gap:5px;padding-top:17px}.bar-axis{display:flex;flex-direction:column;justify-content:space-between;padding-bottom:22px;font-size:11px;color:#d0e4ef;line-height:1}.bar-plot{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-left:1px solid #77a8bd;min-height:0}.bar-column{display:flex;align-items:flex-end;justify-content:center;height:100%;padding:0 10px 22px;position:relative;min-height:0;border-bottom:1px solid #77a8bd}.data-bar{position:relative;width:100%;max-width:65px;background:#65decc;border-radius:5px 5px 0 0;min-height:1px}.data-bar span{position:absolute;top:-17px;left:50%;transform:translateX(-50%);font-size:12px;color:#fff;line-height:15px}.bar-column>b{position:absolute;bottom:1px;left:0;right:0;font-size:11px;font-weight:600;text-align:center;line-height:18px;color:#d3eaf5}
.pictograph{width:100%;max-width:350px;display:grid;gap:5px}.pictograph>div{display:grid;grid-template-columns:46px 1fr;gap:8px;align-items:center;text-align:left}.pictograph b{font-size:12px;color:#ceeaf4}.pictograph span{font-size:19px;letter-spacing:2px;color:#ffe38a;white-space:nowrap}
.visual-panel[data-essential='true']{position:relative;cursor:zoom-in}.visual-panel[data-essential='true'] .coach{display:none!important}.visual-panel[data-essential='true']::after{content:'↗';position:absolute;right:5px;top:3px;display:grid;place-items:center;width:24px;height:24px;border-radius:5px;color:#fff;background:#0b253be8;font-size:16px;pointer-events:none}.visual-panel[data-essential='true']:focus-visible{outline:3px solid #ffe38a;outline-offset:2px}
.diagram-dialog{position:fixed;inset:10px;margin:auto;width:min(800px,calc(100vw - 20px));max-height:calc(100dvh - 20px);overflow:auto;border:1px solid #80e4e8;border-radius:20px;background:#0a1d35;color:#fff;padding:16px;box-shadow:0 20px 90px #000b}.diagram-dialog[open]{display:grid;grid-template-rows:auto minmax(120px,1fr) auto;gap:12px}.diagram-dialog::backdrop{background:#020b20dd}.diagram-dialog header{display:flex;align-items:center;justify-content:space-between;gap:10px}.diagram-dialog h2{font-size:20px;line-height:1.25;margin:0}.diagram-dialog button{white-space:nowrap;min-height:44px}.diagram-dialog>p{font-size:12px;line-height:1.4;margin:0;color:#cbe6ec}.diagram-content{container-type:size;height:min(55dvh,360px);min-height:120px;display:flex;align-items:center;justify-content:center;padding:8px}.diagram-content>div{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;height:100%;gap:10px;text-align:center}.diagram-content svg{height:100%;width:100%;max-height:100%}.diagram-content .survey-items{width:min(460px,100%);gap:10px}.diagram-content .survey-items svg{width:50px;height:40px}.diagram-content .bar-chart{max-width:550px}.diagram-content .pictograph{max-width:500px}.diagram-content .pictograph span{font-size:24px}.diagram-content .clock-pair{height:calc(100cqh - 15px);max-width:450px}.diagram-content .mass-load{font-size:35px}
@media(max-width:600px){.tool-panel{gap:5px;padding:6px 9px}.shape-options{gap:6px}.shape-options button{min-height:62px;font-size:12px}.shape-options svg{height:30px;width:45px}.mirror-grid{grid-auto-rows:44px;gap:3px}.tile-grid{gap:3px}.tile-grid button{min-height:44px}.tool-status{font-size:10px;min-height:20px;max-height:26px}.tally-column{gap:2px}.tally-column small{font-size:10px}.tally-column strong{font-size:22px}.tally-marks{height:20px}.survey-items{gap:3px}.survey-items svg{width:30px;height:25px}.mass-load{font-size:20px;gap:6px}.mass-load span{min-height:44px;padding:5px}.clock-pair{gap:2px}.clock-pair>span{font-size:16px}.clock-unit{grid-template-rows:minmax(0,1fr) 18px}.clock-unit b{font-size:12px;line-height:18px}.pictograph{gap:2px}.pictograph span{font-size:15px;letter-spacing:1px}.pictograph b{font-size:10px}.pictograph>div{grid-template-columns:36px 1fr;gap:4px}.bar-column{padding-left:7px;padding-right:7px}.unit-tile{padding:6px;font-size:12px}.diagram-dialog{padding:10px;border-radius:14px}.diagram-dialog h2{font-size:16px}.diagram-dialog header button{font-size:11px;padding:5px}.diagram-content .pictograph span{font-size:19px}}
@media(max-width:600px) and (orientation:portrait){.learning-play:has(.problem-grid[data-essential='true']){padding-top:6px}.learning-play:has(.problem-grid[data-essential='true']) .learning-question h1{font-size:19px}.problem-grid[data-essential='true']{grid-template-rows:minmax(85px,.8fr) minmax(196px,1.5fr)}body[data-view='learn']:has(.problem-grid[data-essential='true']) #saveStatus{display:none}}
@media(orientation:landscape) and (max-height:560px){.tool-panel{padding:3px 6px;gap:3px}.shape-options button{min-height:60px;font-size:11px;padding:3px}.shape-options svg{width:40px;height:28px}.mirror-grid{grid-auto-rows:44px;gap:3px}.tool-status{font-size:10px;min-height:20px;max-height:26px}.tile-grid{gap:3px}.tile-grid button{min-height:44px}.tally-column{gap:2px}.tally-column small{font-size:10px}.tally-column strong{font-size:22px}.tally-marks{height:20px}.survey-items{gap:3px}.survey-items svg{height:24px;width:30px}.mass-load{font-size:22px;gap:6px}.mass-load span{min-height:44px}.diagram-dialog h2{font-size:15px}.diagram-content{height:min(52dvh,260px)}.diagram-dialog[open]{gap:6px}.diagram-dialog>p{font-size:10px}}
@media(orientation:landscape) and (max-height:360px){.problem-grid[data-essential='true'] .visual-panel{display:flex;grid-column:1;grid-row:1;align-self:end;height:calc(100% - var(--prompt-height,70px) - 7px);padding:3px 5px;min-height:0}.problem-grid[data-essential='true'] .response-panel{grid-row:1}.diagram-dialog{inset:5px;padding:8px;max-height:calc(100dvh - 10px)}.diagram-content{height:150px;min-height:100px}.diagram-dialog h2{font-size:13px}.diagram-dialog>p{display:none}}

.bar-chart{position:relative;height:min(215px,calc(100cqh - 4px));padding-top:20px}.bar-chart::before{content:'Learners';position:absolute;left:0;top:0;color:#d0e8ed;font-size:10px;line-height:12px}.bar-axis{height:calc(100% - 22px);display:block;position:relative;padding:0}.bar-axis span{position:absolute;left:0;transform:translateY(-50%)}.bar-axis span:nth-child(1){top:0}.bar-axis span:nth-child(2){top:50%}.bar-axis span:nth-child(3){top:100%}

/* Grade selection and precise Grade 5 displays share the existing responsive activity grid. */
.grade-picker{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;font-weight:700;color:#d9eaff;margin-bottom:12px}.grade-picker select{max-width:100%;min-height:44px;border:1px solid #7ddbdc;border-radius:10px;padding:8px 12px;background:#16304d;color:#fff;font:inherit}.grade-picker select:focus-visible{outline:3px solid #ffe38a;outline-offset:2px}
.digit-chart{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:4px;width:100%;max-width:450px}.digit-chart>div{display:grid;gap:8px;text-align:center;padding:10px 1px;border:1px solid #4e7c95;border-radius:8px;background:#15334d}.digit-chart small{font-size:clamp(9px,1.3vw,14px);white-space:nowrap}.digit-chart b{font-size:clamp(20px,3vw,36px)}.digit-chart [data-focus="true"]{border-color:#ffe38a;background:#4d492d}.math-readout{font-size:clamp(16px,2.6vw,30px)!important;font-weight:700;line-height:1.4;overflow-wrap:anywhere}.shape-options button:not(:has(svg)){padding:12px 6px;min-height:64px;font-size:clamp(14px,2vw,20px)}
@media(max-height:440px){.grade-picker{margin-bottom:6px}.digit-chart>div{gap:2px;padding:3px 0}.digit-chart b{font-size:20px}.shape-options button:not(:has(svg)){min-height:44px;padding:5px}.math-readout{font-size:17px!important}}

/* After a numeric answer is accepted, keep its value visible and make room for the explanation. */
.problem-grid.solved .number-pad{display:none}
@media(max-width:600px) and (orientation:portrait){.problem-grid.solved:has(.number-pad){grid-template-rows:minmax(60px,1fr) minmax(60px,.5fr)}}
.problem-grid.solved .shape-options{grid-template-columns:1fr}
.problem-grid.solved .shape-options button[aria-pressed='false']{display:none}
.problem-grid.solved .shape-options button{min-height:44px}
@media(max-width:600px) and (orientation:portrait){.problem-grid.solved:has(.shape-options){grid-template-rows:minmax(60px,1fr) minmax(100px,.7fr)}}
@media(max-width:360px) and (orientation:portrait){
 .learning-play:has(.problem-grid[data-essential='true']) .learning-question h1{font-size:17px}
 .problem-grid[data-essential='true']{grid-template-rows:minmax(60px,.8fr) minmax(196px,1.5fr)}
 .problem-grid.solved:has(.number-pad){grid-template-rows:minmax(60px,1fr) minmax(60px,.5fr)}
 .problem-grid.solved:has(.shape-options){grid-template-rows:minmax(60px,1fr) minmax(100px,.7fr)}
}
@media(max-width:360px) and (orientation:portrait){.problem-grid[data-essential='false']:not(.solved){grid-template-rows:minmax(0,.7fr) minmax(196px,1.6fr)}}

/* Grade 6 models keep every touch target usable on the existing compact layouts. */
.g6-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;width:100%;max-width:420px}.g6-groups>div{display:grid;gap:8px;padding:10px 3px;border:1px solid #78bdce;border-radius:10px;background:#14344b;text-align:center}.g6-groups small{font-size:12px;color:#d2eaf3}.g6-groups b{font-size:clamp(22px,3vw,38px);font-variant-numeric:tabular-nums}.g6-groups [data-focus='true']{border-color:#ffe38a;background:#4b462d}
.coordinate-grid{display:grid;grid-template-columns:repeat(3,minmax(44px,1fr));gap:4px;width:min(250px,100%)}.coordinate-grid button{min-height:44px;padding:3px;font-size:17px;background:#173d5b}.coordinate-grid button[aria-pressed='true']{color:#08152b;background:#ffe38a;border-color:#fff5c8}.solved .coordinate-grid button[aria-pressed='true']{opacity:1}
@media(max-width:600px){.g6-groups{gap:4px}.g6-groups>div{gap:3px;padding:5px 2px}.g6-groups small{font-size:10px}.g6-groups b{font-size:22px}}
@media(orientation:landscape) and (max-height:360px){.coordinate-grid{gap:3px}.coordinate-grid button{font-size:14px}.coordinate-panel{gap:3px}}

/* Grade 8 point choices retain readable coordinate headings beside the enlarged diagram. */
.cartesian-grid{grid-template-columns:18px repeat(3,minmax(44px,1fr));grid-template-rows:12px repeat(3,44px);gap:4px}.cartesian-grid>span{display:flex;align-items:center;justify-content:center;font-size:10px;line-height:12px;font-variant-numeric:tabular-nums;color:#d4f5ff}.cartesian-grid button{min-height:44px;padding:2px}
@media(orientation:landscape) and (max-height:360px){.cartesian-panel .tool-status{display:none}}