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li::marker{color:#277fb9;font-weight:950}.division-actions{grid-template-columns:1fr 1fr;gap:10px;margin:20px 0 12px;display:grid}.division-actions button{color:#fff;background:#277fb9;border:0;border-radius:14px;min-height:48px;font-weight:950}.division-actions button.secondary{color:#246f9c;background:#fff;border:2px solid #82bddc}.division-actions button:disabled{opacity:.48}.division-manual-steps>small{color:var(--muted);text-align:center;font-weight:800;display:block}@media (width<=850px){.manual-division-grid{grid-template-columns:1fr}}@media (width<=620px){.manual-division{padding:12px}.division-vocabulary{grid-template-columns:1fr 1fr}.division-progress{grid-template-columns:1fr auto}.division-progress i{grid-column:1/-1}.long-division-manual,.division-manual-steps{padding:14px}.division-bracket{transform-origin:top;margin-bottom:-30px;transform:scale(.9)}.division-actions{grid-template-columns:1fr}}.division-answer-slot{color:#195f89;background:#f6fcff;border:2px dashed 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button:active{transform:scale(.96)}.erase-division-digit{color:#6040bd;background:#fff;border:2px solid #b7a6e5;border-radius:12px;min-height:40px;margin:10px auto 0;font-weight:900;display:block}.erase-division-digit:disabled{opacity:.42}.division-digit-bank>div button.bring-down-digit{color:#8b4c00;background:#fff2ca;border-color:#ef9b24;animation:1s ease-in-out infinite alternate bring-down-pulse;box-shadow:0 0 0 5px #ef9b2433}.division-digit-bank>div button.bring-down-digit small{font-weight:950}@keyframes bring-down-pulse{to{transform:translateY(4px);box-shadow:0 0 0 8px #ef9b241f}}@media (width<=620px){.division-digit-bank>div{grid-template-columns:repeat(5,1fr);gap:5px}.division-digit-bank>div button{min-height:52px;padding:3px}.division-digit-bank>div button small{display:none}}.division-answer-slot.correct{color:#187a3c;background:#e1f7e8;border-style:solid;border-color:#35a65f;box-shadow:0 0 0 4px #35a65f21}.division-answer-slot:disabled{color:#9aa8ae;box-shadow:none;cursor:not-allowed;background:#edf2f4;border-color:#cbd7dc;transform:none}.manual-division{position:relative}.long-division-manual>p.division-error{color:#a51f2a;background:#fff0f0;border:2px solid #eb5964}.division-celebration{z-index:8;color:#fff;text-align:center;background:#e85c61;border:4px solid #fff;border-radius:25px;justify-content:center;align-items:center;gap:18px;width:min(520px,100% - 32px);padding:28px 22px;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 20px 55px #1e28234d}.division-celebration>span{font-size:2.2rem}.division-celebration div{gap:6px;display:grid}.division-celebration strong{font-size:clamp(2rem,5vw,3rem);line-height:1}.division-celebration small{font-size:1rem;font-weight:900}.division-round-title{color:#245f82;text-align:center;background:#e8f5fd;border-radius:12px;padding:10px 13px;font-weight:900}.division-round-title strong{font-size:1.25rem}.division-history{gap:7px;margin-top:10px;display:grid}.division-history>div{color:#2b5e3d;background:#edfaf1;border:2px solid #b9e4c8;border-radius:12px;grid-template-columns:auto auto auto 1fr;align-items:center;gap:9px;padding:9px 11px;display:grid}.division-history span{color:#a02836}.division-history small{text-align:right;color:#277fb9;font-weight:900}.division-manual-steps li.current{background:#e9f6ff;border-radius:10px;outline:2px solid #76b9df;padding:8px}.division-manual-steps li.done{color:#287a47}.division-manual-steps li.done:after{content:" ✓";font-weight:950}.division-place-digits{grid-template-columns:repeat(3,minmax(58px,76px));justify-content:center;gap:7px;margin:12px auto 0;display:grid}.division-place-digits.decenas{grid-template-columns:repeat(2,minmax(58px,76px))}.division-place-digits.unidades{grid-template-columns:minmax(58px,76px)}.division-place-digits>div{background:#f4fbff;border:2px solid #abd4ea;border-radius:12px;place-items:center;padding:7px;display:grid}.division-place-digits small{color:#277fb9;font-size:.72rem;font-weight:900}.division-place-digits b{color:#243238;font-size:1.5rem}.division-subtraction-map{background:#f7fcff;border:2px solid #b8dff4;border-radius:16px;gap:10px;margin:14px 0;padding:12px;display:grid}.subtraction-stage{background:#fff;border:2px solid #d5e3ea;border-radius:13px;padding:11px}.subtraction-stage.current{border-color:#2787bd;box-shadow:0 0 0 3px #2787bd1a}.subtraction-stage.completed{background:#effaf3;border-color:#62bb80}.subtraction-stage.waiting{opacity:.58}.subtraction-stage-title{color:#236f9b;justify-content:space-between;gap:8px;margin-bottom:8px;font-size:.82rem;display:flex}.subtraction-operation{text-align:right;grid-template-columns:1fr auto;align-items:end;width:104px;margin:auto;font-size:1.25rem;display:grid}.subtraction-operation strong,.subtraction-operation span,.subtraction-operation b{padding:1px 7px}.subtraction-operation i{border-top:3px solid #277fb9;grid-column:1/-1}.subtraction-operation b{color:#187a3c;grid-column:1/-1}.bring-down-line{color:#416474;border-top:2px dashed #b9d5e5;justify-content:center;align-items:center;gap:6px;margin-top:9px;padding-top:8px;font-size:.78rem;font-weight:850;display:flex}.bring-down-line b{color:#216f9e;background:#e8f5fd;border-radius:9px;place-items:center;width:30px;height:30px;font-size:1.1rem;display:grid}.bring-down-line strong{color:#187a3c;font-size:1.05rem}.bring-down-line.active{color:#784700;background:#fff5d7;border:2px solid #ef9b24;border-radius:10px;padding:8px}.bring-down-line.active b{color:#fff;background:#ef9b24;animation:1s ease-in-out infinite alternate bring-down-pulse}@media (width<=620px){.division-history>div{grid-template-columns:auto auto auto}.division-history 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#0000;border-radius:13px;grid-template-columns:1fr .55fr 1fr .55fr 1.2fr;place-items:center;width:100%;min-height:47px;display:grid}@supports (color:color-mix(in lab, red, red)){.learn-table-row{background:color-mix(in srgb,var(--accent-soft) 65%,white)}}.learn-table-row{color:var(--ink);font-variant-numeric:tabular-nums;cursor:pointer;font-size:clamp(1.2rem,3vw,1.65rem);font-weight:850;transition:background .2s,transform .2s,box-shadow .2s}.learn-table-row:nth-child(2n){background:var(--accent-soft)}@supports (color:color-mix(in lab, red, red)){.learn-table-row:nth-child(2n){background:color-mix(in srgb,var(--accent-soft) 85%,white)}}.learn-table-row strong{color:var(--accent)}@supports (color:color-mix(in lab, red, red)){.learn-table-row strong{color:color-mix(in srgb,var(--accent) 78%,#252131)}}.learn-table-row.active{border-color:var(--accent);background:var(--accent);color:#fff;box-shadow:0 3px 0 var(--accent)}@supports (color:color-mix(in lab, red, 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.mode-practice{justify-content:center;align-items:center;gap:.5rem;display:inline-flex}.chest-icon{flex:none;width:2rem;height:2rem}.treasure-overlay{z-index:1000;background:#1f0f37d1;place-items:center;padding:1rem;display:grid;position:fixed;inset:0}.treasure-panel{text-align:center;background:#fff9e9;border:5px solid #f9c85c;border-radius:28px;width:min(1100px,100%);max-height:94dvh;padding:clamp(1rem,3vw,2rem);position:relative;overflow:auto;box-shadow:0 24px 70px #00000059}.treasure-close{z-index:5;color:#542579;cursor:pointer;background:#fff;border:2px solid #6c36a0;border-radius:50%;place-items:center;width:44px;height:44px;margin:0 0 -2.6rem auto;font-size:2rem;line-height:1;display:grid;position:sticky;top:0}.treasure-panel h3{color:#4d2670;margin:0;font-size:clamp(1.5rem,4vw,2.3rem)}.treasure-panel p{color:#513f2d;margin:.45rem 0 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#ffe78a}.treasure-stop-symbol.completed{background:#30b632;border-color:#eaffab}.treasure-stop-label{color:#452053;background:#fff2c9;border:2px solid #b67c35;border-radius:.5em;place-items:center;width:100%;min-height:2.3em;margin-top:.25em;padding:.15em .2em;font-size:clamp(.72rem,1.45vw,1.05rem);line-height:1.1;display:grid;box-shadow:0 2px 5px #513a4370}.treasure-stop-label small{color:#17641a;text-transform:uppercase;font-size:.8em;font-weight:900}@media (width<=700px){.treasure-scene{min-width:760px}}.treasure-marker{z-index:2;aspect-ratio:1;pointer-events:none;background:#ffcf39;border:3px solid #fff;border-radius:50%;place-items:center;width:clamp(32px,6vw,64px);font-size:clamp(21px,3vw,38px);display:grid;position:absolute;transform:translate(-50%,-50%);box-shadow:0 0 0 5px #872db3,0 6px 20px #42207c}.treasure-marker.moving{animation:.45s ease-in-out 10 treasure-hop}@keyframes treasure-hop{50%{transform:translate(-50%,-70%)rotate(7deg)}}.treasure-chest{font-size:clamp(2rem,7vw,5rem);animation:1s ease-in-out infinite alternate treasure-glow;position:absolute;bottom:16%;right:5%}@keyframes treasure-glow{to{filter:drop-shadow(0 0 18px gold);transform:scale(1.18)}}.treasure-controls{flex-wrap:wrap;justify-content:center;gap:.8rem;margin-top:1rem;display:flex}.treasure-continue{color:#fff;cursor:pointer;background:#6c36a0;border:0;border-radius:16px;padding:.8rem 1.2rem;font-size:1rem;font-weight:800;display:inline-block}.treasure-continue:hover,.treasure-link:hover{filter:brightness(1.1)}.treasure-continue:disabled{opacity:.55;cursor:wait;filter:none}@media (prefers-reduced-motion:reduce){.treasure-marker.moving,.treasure-chest{transition:none;animation:none}}.arithmetic-map-entry{justify-content:center;margin:.7rem 0 1rem;display:flex}.arithmetic-map-scene{aspect-ratio:3/2}.arithmetic-map-start{color:#452053;background:#fff4d3;border-radius:.5rem;padding:.25rem 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43%}.owl-mobile-card strong,.owl-mobile-card small{padding:0 10px;display:block}.owl-mobile-card strong{margin-top:7px;font-size:1rem;line-height:1.2}.owl-mobile-card strong b{font-size:1.3rem}.owl-mobile-card small{color:#365c92;margin-top:5px;font-size:.78rem;font-weight:800}}@media (prefers-reduced-motion:reduce){.owl-portal{transition:none}}.world-home-open{background:#f8e7f5}.world-home{background:linear-gradient(145deg,#fff7fc 0%,#f7e4fa 62%,#ffe9dc 100%);box-shadow:0 18px 55px #713c7530}.world-home-heading h1{color:#68236f}.world-home-heading p{color:#ad3778}.world-home-heading select{border-color:#b956a9}.owl-world-scene{box-shadow:0 16px 38px #743e7738}.owl-mobile-card{color:#60336c;box-shadow:0 7px 16px #874b8b38}.owl-mobile-card small{color:#9c3474}.background-music-button{z-index:100;color:#fff;cursor:pointer;background:#7c287d;border:2px solid #fff;border-radius:999px;padding:12px 18px;font-size:1rem;font-weight:800;position:fixed;bottom:18px;right:18px;box-shadow:0 5px 18px #3f184e55}.background-music-button:focus-visible{outline-offset:3px;outline:3px solid #f6b8e5}@media (width<=700px){.background-music-button{padding:10px 14px;font-size:.88rem;bottom:10px;right:10px}}.owl-mobile-map{display:none}@media (width<=700px){.world-home-open .page-wrap{width:100%;padding:0}.world-home{box-shadow:none;background:#f5cbeb;border-radius:0;min-height:100svh;padding:0}.world-home-heading{z-index:3;pointer-events:none;margin:0;display:block;position:absolute;top:9px;right:9px}.world-home-heading>div{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.world-home-heading label{pointer-events:auto;background:#fffdf1ee;border:1px solid #fff9;border-radius:12px;gap:5px;width:auto;padding:5px;display:flex;box-shadow:0 4px 12px #54235333}.world-home-heading label span{font-size:.8rem}.world-home-heading select{min-height:36px;padding:3px 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h1{font-size:clamp(1.9rem,3vw,3rem)}.owl-world-scene{width:100%;height:100%;box-shadow:none;border-radius:0}.owl-world-scene>img{object-fit:fill;width:100%;height:100%}}@media (prefers-reduced-motion:reduce){.owl-mobile-portal{transition:none}}@media (width<=700px){.owl-mobile-portal-addition{width:38%;height:17%;top:7%;left:8%}.owl-mobile-portal-subtraction{width:38%;height:16%;top:25%;left:31%}.owl-mobile-portal-multiplication{width:39%;height:16%;top:41%;left:56%}.owl-mobile-portal-division{width:38%;height:19%;top:59%;left:61%}}.division-place-digits .pending-dividend-digit{background:#fff4d9;border-color:#ed9c26}.division-place-digits .pending-dividend-digit button{color:#49300a;cursor:grab;background:#ed9c26;border:0;border-radius:9px;min-width:45px;min-height:44px;font-size:1.4rem;font-weight:950}.division-place-digits .pending-dividend-digit button:focus-visible,.bring-down-line button:focus-visible{outline-offset:2px;outline:3px solid #724eb9}.bring-down-line 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#e6a12b;border-radius:8px;min-width:28px;min-height:45px;margin:-3px 0 0;padding:0 1px;font-size:1.6rem;font-weight:950;animation:1s ease-in-out infinite alternate bring-down-pulse}.division-workpad-right{border-left:4px solid #243238}.division-workpad-divisor{border-bottom:4px solid #243238;min-height:46px;padding:6px 8px;font-size:1.8rem;display:block}.division-workpad-quotient{gap:5px;min-height:52px;padding:5px;display:flex}.division-workpad-quotient .division-answer-slot,.division-workpad-quotient span{place-items:center;width:42px;min-width:38px;height:43px;font-size:1.35rem;display:grid}.workpad-solved-digit{color:#196d9e;font-weight:950}.workpad-future-digit{color:#a0aeb6;border:2px dashed #c9d5da;border-radius:9px}.division-workpad-steps{width:174px;margin:0}.workpad-stage{border-radius:12px;margin-bottom:12px;padding:2px 8px 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#cad7de;border-radius:8px;width:42px;height:40px;font-size:1.3rem;font-weight:900}.workpad-bring-down.ready button{color:#8d4b00;cursor:pointer;background:#fff0ca;border:2px solid #e6a12b}.workpad-bring-down small{width:95px;font-size:.7rem;font-weight:800;line-height:1.1}.division-workpad button:focus-visible{outline-offset:2px;outline:3px solid #7556ca}@media (width<=620px){.division-workpad{width:min(100%,310px);padding:10px}.division-workpad-top{grid-template-columns:1fr 105px}}@media (prefers-reduced-motion:reduce){.division-workpad-dividend .source-digit{animation:none}}.victory-overlay{z-index:1300;background:#200e3ce6;place-items:center;padding:clamp(8px,2vw,24px);display:grid;position:fixed;inset:0}.victory-panel{background:#fff8e9;border:4px solid #ffe299;border-radius:26px;width:min(1050px,100%);max-height:98svh;overflow:auto;box-shadow:0 20px 65px #150a2bb3}.victory-art{isolation:isolate;border-radius:21px 21px 0 0;position:relative;overflow:hidden}.victory-art:after{content:"";z-index:1;pointer-events:none;background:linear-gradient(#0000,#230d3ce8);height:50%;position:absolute;inset:auto 0 0}.victory-art img{object-fit:cover;object-position:center;width:100%;height:min(65svh,600px);animation:1.2s ease-out both victory-reveal;display:block}.victory-copy{z-index:2;color:#fff;text-align:center;text-shadow:0 2px 10px #32112b;position:absolute;bottom:clamp(16px,3vw,30px);left:clamp(14px,3vw,32px);right:clamp(14px,3vw,32px)}.victory-copy h2{color:#fff5ba;margin:0;font-size:clamp(1.7rem,5vw,3.4rem);line-height:1.05}.victory-copy p{margin:8px 0 0;font-size:clamp(1rem,2vw,1.35rem);font-weight:800}.victory-controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;padding:16px;display:flex}.victory-controls button{color:#512673;cursor:pointer;background:#fff;border:2px solid #77449c;border-radius:14px;min-height:48px;padding:9px 18px;font-size:1rem;font-weight:850}.victory-controls .victory-close{color:#fff;background:#6337aa;border-color:#6735a0}.victory-controls .victory-close:disabled{opacity:.65;cursor:wait}.victory-controls button:focus-visible{outline-offset:3px;outline:3px solid #f9b840}@keyframes victory-reveal{0%{filter:brightness(.65);transform:scale(.94)}to{filter:brightness();transform:scale(1)}}@media (width<=700px){.victory-art img{object-position:center;height:min(69svh,640px)}.victory-copy{bottom:12px}.victory-copy h2{font-size:clamp(1.6rem,7vw,2.4rem)}.victory-controls{gap:7px;padding:10px}.victory-controls button{flex:180px}}@media (prefers-reduced-motion:reduce){.victory-art img{animation:none}}.division-workpad{width:min(100%,324px)}.division-workpad-top{width:max-content;min-height:96px;margin-left:calc(50% - var(--division-digits) * 21px);grid-template-columns:max-content 112px;justify-content:center;gap:5px}.division-workpad-dividend{grid-auto-columns:42px;grid-auto-flow:column;justify-content:start;padding:11px 0 0;font-size:1.8rem;display:grid}.division-workpad-dividend>span{min-width:0}.division-workpad-dividend .source-digit{touch-action:manipulation;cursor:pointer;width:40px;min-width:0;font-size:1.35rem;animation:none}.division-continuous{width:calc(var(--division-digits) * 42px);margin:0 auto 10px}.division-continuous-stage{grid-template-columns:repeat(var(--division-digits),42px);grid-template-rows:46px 3px 48px;display:grid;position:relative}.division-continuous-row{justify-content:flex-end;align-items:center;font-size:1.7rem;font-weight:900;line-height:1;display:flex}.division-continuous-row strong{padding-right:6px}.product-row{color:#286bc2;grid-row:1}.product-row:before{content:"−";color:#28a7a4;position:absolute;left:-19px}.division-continuous-rule{background:#2480b6;grid-row:2}.remainder-row,.lowered-row{color:#286bc2;grid-row:3}.division-continuous-row .division-answer-slot{width:100%;min-width:40px;height:42px;min-height:42px;padding:0;font-size:1.4rem}.lowered-row .division-answer-slot.active{touch-action:manipulation;cursor:pointer;background:#fff2d7;border-color:#e89734;font-size:1.15rem}@media (width<=620px){.division-workpad-top{grid-template-columns:max-content 105px}.division-workpad-dividend{grid-auto-columns:42px}}.digit-bank>div.numeric-keypad,.division-digit-bank>div.numeric-keypad{grid-template-columns:repeat(3,minmax(0,1fr))}.numeric-keypad>button:last-child{grid-column:2}.quick-practice{background:linear-gradient(145deg,#fff7fc,#f3e7ff);border:2px solid #d9b3f0;border-radius:24px;margin-top:22px;padding:clamp(16px,3vw,26px);box-shadow:0 10px 24px #622c7a16}.quick-practice-heading{justify-content:space-between;align-items:center;gap:15px;display:flex}.quick-practice-heading h3{color:#4d276a;margin:0;font-size:clamp(1.35rem,3vw,2rem)}.quick-practice-heading p:last-child{color:#55465c;margin:.45rem 0 0}.quick-explanation-button{color:#5a2686;background:#fff;border:2px solid #7e43ad;border-radius:14px;flex:none;min-height:48px;padding:10px 16px;font-weight:900}.quick-practice-body{grid-template-columns:1fr minmax(230px,320px);align-items:center;gap:clamp(14px,3vw,30px);margin-top:18px;display:grid}.quick-question{text-align:center;background:#fff;border-radius:20px;align-content:center;place-items:center;gap:12px;min-height:260px;padding:18px;display:grid}.quick-question>span{color:#68488b;font-weight:850}.quick-question strong{white-space:nowrap;font-size:clamp(2rem,6vw,4rem);font-weight:950}.quick-question em{color:#7136ad;background:#f5e4ff;border-radius:15px;min-width:1.4em;padding:.03em .2em;font-style:normal;display:inline-block}.quick-face{align-content:center;place-items:center;min-height:70px;font-size:2.3rem;display:grid}.quick-face span{font-size:1rem;font-weight:850}.quick-face.correct{color:#277d46}.quick-face.incorrect{color:#a54d54}.quick-finished{color:#643098;max-width:24ch;font-size:1.45rem;font-weight:900}.quick-keypad{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.quick-keypad button{color:#4e2576;background:#fff;border:2px solid #cda6ea;border-radius:15px;min-height:58px;font-size:1.55rem;font-weight:950}.quick-keypad button:last-child{grid-column:2}.quick-keypad button:hover:not(:disabled){background:#e9d0ff}.quick-keypad button:disabled{opacity:.5}.quick-actions{flex-wrap:wrap;justify-content:center;gap:8px;margin-top:12px;display:flex}.quick-actions button{color:#fff;background:#7e49b2;border:1px solid #9b6ac4;border-radius:12px;min-height:44px;padding:8px 12px;font-weight:850}.quick-actions button:disabled{opacity:.45}.explanation-overlay{z-index:1500;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;padding:calc(76px + env(safe-area-inset-top)) 16px calc(24px + 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red)){.visual-count-group{background:color-mix(in srgb,var(--group-color) 10%,white)}}.visual-count-group{box-shadow:0 4px 0 var(--group-color);border-width:2px}@supports (color:color-mix(in lab, red, red)){.visual-count-group{box-shadow:0 4px 0 color-mix(in srgb,var(--group-color) 25%,white)}}.visual-count-group .visual-group-label{border-radius:0 0 18px 18px;margin:0 12px;padding:7px 4px}.visual-count-group .visual-objects{padding:16px 12px}.visual-count-group>strong{border-radius:50%;place-items:center;width:36px;height:36px;margin:0 auto 10px;padding:0;font-size:1.15rem;display:grid}.visual-total{background:linear-gradient(110deg,#a83d9a,#5b62bc)}@media (width<=620px){.multiplication-number-line{padding:12px}.jump-heading h3{font-size:1.15rem}.jump-scroll svg{min-width:620px}.multiplication-number-line p:after{content:" ↔"}}.long-workbook{--column-width:clamp(37px,6vw,53px)}.long-workbook .long-row{flex-wrap:nowrap;align-self:flex-end;width:max-content}.long-workbook .long-digit{box-sizing:border-box;width:var(--column-width);min-width:var(--column-width);max-width:var(--column-width);flex:0 0 var(--column-width);padding:0}.long-workbook .long-work-row{align-items:flex-end}.long-workbook .long-carry-slot{padding:0}@media (width<=900px){.long-workbook{align-items:flex-end;padding-left:32px}.long-workbook .long-rule{align-self:flex-end}}@media (width<=400px){.long-workbook{--column-width:37px;padding-left:28px;padding-right:8px}}.visual-study-layout>.multiplication-number-line{align-self:start;min-width:0;margin:0}.visual-study-layout>.multiplication-number-line .jump-scroll svg{min-width:620px}.swap-factors-button{color:#fff;cursor:pointer;background:linear-gradient(110deg,#ad359b,#6450bd);border:2px solid #8c349e;border-radius:15px;width:100%;min-height:48px;padding:10px 14px;font-size:1rem;font-weight:850}.swap-factors-button[aria-pressed=true]{background:linear-gradient(110deg,#156b9c,#247b67);border-color:#156b9c}.swap-factors-button:focus-visible{outline-offset:3px;outline:3px solid #ff9b32}.swap-factors-note{text-align:center;color:var(--ink);margin:10px 0 16px;font-size:.95rem;line-height:1.4}.study-visual-examples{gap:22px;min-width:0;display:grid}.study-visual-examples .multiplication-number-line{min-width:0;margin:0}.equal-groups-example{color:#142b55;background:#fff6dc;border:1px solid #f3dda1;border-radius:24px;min-width:0;padding:clamp(16px,3vw,26px)}.equal-groups-example h3{color:#142b55;margin:0 0 10px;font-size:clamp(1.3rem,2.5vw,1.8rem)}.equal-groups-example p{margin:0 0 20px;line-height:1.5}.equal-groups-trays{grid-template-columns:repeat(auto-fit,minmax(min(100%,125px),1fr));gap:16px;margin:24px 0;display:grid}.equal-group-item{text-align:center;min-width:0}.equal-group-tray{box-sizing:border-box;background:#f0ce91;border:5px solid #ba8648;border-radius:12px;flex-wrap:wrap;place-content:center;gap:5px;min-height:66px;padding:12px 8px;display:flex;box-shadow:inset 0 0 0 2px #9d6633,0 4px #dfbb7b}.equal-group-bead{background:radial-gradient(circle at 32% 26%,#d4ffec 0 12%,#68d3bd 22%,#29a69d 56%,#176e77 100%);border:1px solid #207c7c;border-radius:50%;flex:0 0 20px;width:20px;height:20px;display:block;box-shadow:0 2px 2px #583e3244}.equal-group-caption{margin-top:10px;font-size:.95rem;font-weight:750;display:block}.equal-group-result{text-align:center;color:#142b55;background:#dff1c7;border-radius:19px;padding:14px;font-size:clamp(1.5rem,3vw,2rem);font-weight:900}@media (width<=620px){.equal-groups-trays{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.equal-group-tray{padding:10px 5px}.equal-group-bead{flex-basis:18px;width:18px;height:18px}}.concepts-header nav .concept-topic-neighbors{color:#4b2703;background:#ffab52;border:2px solid 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strong{color:#156aaf;font-size:clamp(2.5rem,7vw,5rem)}.neighbor-card p{padding:0 8px}.neighbor-1{background:#fff9df;border-color:#f9a500}.neighbor-1 h3{background:#ffe77d}.neighbor-1 strong{color:#d75e00}.neighbor-2{background:#fff0f7;border-color:#eb548e}.neighbor-2 h3{background:#ffc6e1}.neighbor-2 strong{color:#d32b79}.neighbors-box{background:#fcfdff;border:2px solid #b5ccec;border-radius:24px;margin:22px 0;padding:20px}.neighbors-box h3{color:#265a96;margin-top:0;font-size:1.5rem}.neighbors-line{border-top:4px solid #7751ba;grid-template-columns:repeat(7,minmax(0,1fr));margin:65px 0 22px;display:grid}.neighbors-line>span{text-align:center;padding-top:14px;font-size:clamp(1rem,3vw,1.6rem);font-weight:850;position:relative}.neighbors-line>span:before{content:"";background:#7751ba;width:3px;height:12px;position:absolute;top:-7px;left:50%}.neighbors-line .selected{color:#c84f00;background:#ffe7bf;border-radius:0 0 15px 15px}.neighbors-line b{font-size:2rem;position:absolute;top:-48px;left:50%;transform:translate(-50%)}.neighbors-controls{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.neighbors-controls button{color:#fff;cursor:pointer;background:#157db5;border:0;border-radius:14px;padding:12px;font-size:1rem;font-weight:800}.neighbors-controls button+button{background:#d23283}.neighbors-controls button:disabled{opacity:.4}.neighbors-note{text-align:center;font-weight:800}.neighbors-examples{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.neighbors-examples>div{background:#fff1f8;border:2px solid #f4a4cf;border-radius:18px;justify-content:space-around;gap:5px;padding:16px 8px;font-size:1.5rem;display:flex}.neighbors-examples strong{color:#cf2f87}.neighbors-practice label{flex-wrap:wrap;align-items:center;gap:12px;margin:14px 0;display:flex}.neighbors-practice label>span{flex:1;min-width:180px}.neighbors-practice input{border:2px solid #a57ac8;border-radius:10px;width:75px;padding:9px;font-size:1.2rem}.neighbors-practice details{background:#e7f7df;border-radius:14px;padding:14px}.neighbors-practice summary{cursor:pointer;font-weight:800}@media (width<=650px){.neighbors-cards{gap:6px}.neighbor-card h3{padding:10px 3px;font-size:.85rem}.neighbor-card p{font-size:.85rem}.neighbors-box{padding:12px}.neighbors-examples{grid-template-columns:1fr}.neighbors-banner{padding:15px 8px}}.neighbors-line-scroll{margin-top:8px;padding:0 0 12px;overflow-x:auto}.neighbors-inline-line{isolation:isolate;grid-template-columns:repeat(7,minmax(0,1fr));align-items:end;min-width:560px;padding-top:20px;padding-bottom:8px;display:grid;position:relative}.neighbors-inline-line:before{content:"";z-index:-1;background:#8053bf;height:4px;position:absolute;top:90px;left:0;right:0}.neighbor-inline-number{place-items:center;min-height:60px;margin-bottom:4px;padding-top:10px;display:grid;position:relative}.neighbor-inline-number:before{content:"";background:#8053bf;width:3px;height:12px;position:absolute;top:-5px;left:50%}.neighbor-inline-number strong{color:#19305b;font-size:1.6rem}.neighbor-inline-number.current{background:#ffe8bf;border-radius:0 0 18px 18px}.neighbor-inline-number.current strong{color:#c45800}.neighbor-frog{font-size:1.8rem;animation:.35s ease-out neighbor-arrive;position:absolute;top:-42px;left:50%;transform:translate(-50%)}.neighbor-inline-control{color:#fff;cursor:pointer;background:#167fb2;border:0;border-radius:17px 17px 0 0;flex-direction:column;justify-content:space-between;align-items:center;min-width:0;height:134px;padding:14px 5px 10px;display:flex}.neighbor-inline-control.next{background:#cd2c88}.neighbor-inline-control span{white-space:nowrap;font-size:clamp(.8rem,1.4vw,1rem);font-weight:850}.neighbor-inline-control strong{font-size:1.9rem;font-weight:700}.neighbor-inline-control:focus-visible{outline-offset:3px;outline:3px solid #ffb531}.neighbor-inline-control:disabled{opacity:.5;cursor:default}@keyframes neighbor-arrive{0%{transform:translate(-50%,-14px)}to{transform:translate(-50%)}}@media (prefers-reduced-motion:reduce){.neighbor-frog{animation:none}}@media (width<=650px){.neighbors-inline-line{min-width:500px}.neighbor-inline-control span{font-size:.75rem}}.neighbor-inline-control.previous{color:#71348c;background:#f3c62e;border:2px solid #c4a0e5;border-radius:14px}.neighbor-inline-control.next{color:#4f225f;background:#c92b90;border:2px solid #c4a0e5;border-radius:14px}.neighbors-sketch-navigation{justify-content:space-between;gap:20px;margin:2px 0 10px;padding:0 5%;display:flex}.neighbors-sketch-navigation button{color:#fff;cursor:pointer;background:#1682b7;border:0;border-radius:12px;width:145px;max-width:40%;min-height:40px;font-size:2rem;font-weight:800;line-height:1}.neighbors-sketch-navigation button:disabled{opacity:.4;cursor:default}.neighbors-sketch-navigation button:focus-visible{outline-offset:3px;outline:3px solid #c78ce3}.neighbors-quiz{background:linear-gradient(120deg,#fff6fc,#f0e9ff);border:2px solid #b68ae2;border-radius:24px;margin-top:26px;padding:clamp(14px,3vw,26px)}.neighbors-quiz h3{color:#653299;margin:0 0 12px;font-size:1.5rem}.neighbors-quiz p{line-height:1.5}.neighbors-quiz-progress{gap:10px;margin:20px 0;display:grid}.neighbors-quiz-progress progress{accent-color:#d3368b;width:100%;height:22px}.neighbors-quiz-equation{background:#fff;border-radius:20px;justify-content:center;align-items:center;gap:clamp(8px,3vw,24px);padding:20px 5px;display:flex}.neighbors-quiz-equation>*{color:#22679c;background:#e0f0ff;border-radius:16px;place-items:center;width:70px;height:70px;font-size:2rem;display:grid}.neighbors-quiz-equation>strong{color:#b95100;background:#ffe5af}.neighbors-quiz-equation>span:last-child{color:#b52b79;background:#ffe0ef}.neighbors-quiz-choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.neighbors-quiz-choices fieldset{border:2px solid #a6c8e8;border-radius:18px;min-width:0;margin:0;padding:14px}.neighbors-quiz-choices fieldset+fieldset{border-color:#eea0c9}.neighbors-quiz-choices legend{font-weight:850}.neighbors-quiz-choices fieldset>div{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.neighbors-quiz-choices button{color:#573080;cursor:pointer;background:#fff;border:2px solid #b58ad9;border-radius:14px;min-height:54px;font-size:1.5rem;font-weight:850}.neighbors-quiz-choices button.chosen{color:#fff;background:#7751ba}.neighbors-quiz-choices button:disabled{cursor:default}.neighbors-quiz-feedback{min-height:3em;font-weight:850}.neighbors-quiz-feedback.correct{color:#21713b}.neighbors-quiz-feedback.wrong{color:#a52c51}@media (width<=580px){.neighbors-quiz-choices{grid-template-columns:1fr}.neighbors-quiz-equation>*{width:60px;height:60px}.neighbors-quiz-choices fieldset{padding:10px}}.final-challenge-overlay{z-index:10000;background:#261641dc;place-items:center;padding:16px;display:grid;position:fixed;inset:0;overflow-y:auto}.final-challenge-card{box-sizing:border-box;color:#3b2358;background:linear-gradient(135deg,#fff9df,#fff0fa);border:3px solid #f3bd42;border-radius:28px;width:min(100%,800px);max-height:94dvh;padding:clamp(20px,4vw,38px);position:relative;overflow-y:auto}.final-challenge-card h2{margin:12px 0;padding-right:20px;font-size:clamp(1.5rem,4vw,2.5rem)}.final-challenge-card p{line-height:1.5}.final-challenge-close{color:#5f338b;cursor:pointer;background:#fff;border:2px solid #b383cf;border-radius:12px;width:40px;height:40px;position:absolute;top:12px;right:12px}.final-challenge-card progress{accent-color:#c42e87;width:100%;height:24px;margin:12px 0;display:block}.final-challenge-equation{text-align:center;background:#fff;border-radius:20px;padding:24px;font-size:clamp(2rem,8vw,3.5rem);font-weight:900}.final-challenge-options{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:20px 0;display:grid}.final-challenge-options button{color:#593184;cursor:pointer;background:#fff;border:2px solid #a76cd2;border-radius:16px;min-height:65px;font-size:1.8rem;font-weight:850}.final-challenge-options .wrong{background:#ffe0eb;border-color:#c43763}.final-challenge-options .correct{background:#d6f5c9;border-color:#49a03c}.final-challenge-feedback{text-align:center;min-height:2em;font-weight:850}.final-challenge-notice{background:#682c89;border:3px solid #c370bd;border-radius:20px;margin:16px 0;position:relative;overflow:hidden}.final-challenge-notice img{object-fit:cover;width:100%;height:180px;display:block}.final-challenge-notice figcaption{color:#fff;text-align:center;padding:14px;font-size:1.3rem;font-weight:850}.final-challenge-notice.retry{background:#784b23;border-color:#e5a34d}@media (width<=580px){.final-challenge-options{grid-template-columns:repeat(2,minmax(0,1fr))}.final-challenge-overlay{padding:8px}.final-challenge-card{padding:18px}.final-challenge-notice img{height:135px}}.adventure-story-popup{text-align:center}.adventure-art-window{aspect-ratio:2;background-color:#dff5ff;background-position:50% 48%;background-repeat:no-repeat;background-size:150%;border-radius:22px;width:100%}.adventure-story-popup h3{color:#762d90;margin:18px 0 10px;font-size:clamp(1.3rem,3vw,2rem)}.adventure-continue{color:#4c2900;cursor:pointer;background:linear-gradient(110deg,#ffdc5d,#ffb146);border:2px solid #a86b12;border-radius:16px;min-height:50px;padding:14px 22px;font-size:1.1rem;font-weight:850}.adventure-continue:focus-visible{outline-offset:3px;outline:3px solid #794eb3}.adventure-map-actions{justify-content:center;margin-top:18px;display:flex}.adventure-view-map{color:#fff;cursor:pointer;background:linear-gradient(110deg,#8f52c9,#6639a8);border:2px solid #7644ad;border-radius:16px;min-height:50px;padding:14px 26px;font-size:1.1rem;font-weight:850}.adventure-view-map:focus-visible{outline-offset:3px;outline:3px solid #f3bd42}@media (width<=580px){.adventure-view-map{width:100%}}