:root{font-family:ui-rounded,"Trebuchet MS",system-ui,-apple-system,sans-serif;color:#1c2d4b;background:#f9fbff;font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}.skip{position:absolute;left:-9999px;top:0;background:white;padding:1rem;z-index:9}.skip:focus{left:1rem}.site-header{display:flex;align-items:center;justify-content:space-between;padding:19px max(5%,calc((100% - 1200px)/2));background:#fff;gap:20px}.brand{font-weight:1000;font-size:1.75rem;letter-spacing:-1.2px;color:#213c6b;white-space:nowrap}.brand span:last-child{color:#ff9e37}.brand-mark{color:#ffae3c;font-size:2rem}.site-header nav{display:flex;gap:30px;font-size:.95rem;font-weight:800}.site-header nav a:hover,.text-button:hover{text-decoration:underline}.hero{max-width:1280px;margin:auto;display:grid;grid-template-columns:1.06fr .94fr;min-height:500px;padding:70px 5% 45px;align-items:center;gap:25px}.eyebrow,.kicker{font-size:.78rem;font-weight:1000;letter-spacing:2px;color:#ee8840}.hero h1{font-size:clamp(3rem,6vw,5.3rem);line-height:1.05;letter-spacing:-3px;margin:19px 0}.hero h1 em{font-style:normal;color:#7661dc}.hero-copy>p{font-size:1.19rem;line-height:1.7;max-width:510px;color:#566781}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:27px 0}.btn{border:0;border-radius:16px;padding:15px 22px;font-weight:900;display:inline-flex;justify-content:center;align-items:center;gap:8px}.primary{background:#ffab3d;color:#182d54;box-shadow:0 6px 0 #e89127}.primary:hover{background:#ffc063}.primary:active{transform:translateY(3px);box-shadow:0 3px 0 #e89127}.light{background:#ece9ff;color:#5445b0}.outline{border:2px solid #d6def0;background:white;color:#283c5d}.full{width:100%}.hero-note{font-size:.82rem;color:#718096;font-weight:700}.hero-art{height:390px;position:relative;background:radial-gradient(circle at 50% 48%,#fce7a7 0 25%,#f4e8ff 26% 56%,transparent 57%);display:grid;place-items:center}.mascot{width:190px;height:190px;background:#ffc94c;border-radius:48% 48% 43% 43%;border:9px solid #fff;box-shadow:0 18px 40px #7763ba30;display:grid;place-items:center;font-size:5rem;font-weight:1000;color:#293b5b;transform:rotate(-10deg)}.orbit{position:absolute;border-radius:22px;padding:14px;background:white;box-shadow:0 10px 30px #38467a1c;font-weight:1000;color:#6554d6;transform:rotate(-8deg)}.orbit strong{color:#f48e2d}.orbit-one{top:20px;left:12px}.orbit-two{top:15px;right:35px;font-size:2rem;color:#ffa82f}.orbit-three{bottom:34px;right:0;transform:rotate(8deg)}.bubble{position:absolute;bottom:25px;left:0;background:#c9f2dc;padding:14px 18px;border-radius:25px;font-weight:900;transform:rotate(-7deg)}.intro{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:1130px;margin:0 auto 60px;padding:0 5%}.intro>div{border-radius:23px;background:white;padding:25px;box-shadow:0 8px 30px #2036630c}.intro span{display:block;font-size:2rem;margin-bottom:9px}.intro strong{font-size:1.05rem}.intro p{color:#718096;margin:8px 0 0;font-size:.91rem}.section{max-width:1130px;padding:45px 5%;margin:auto;scroll-margin-top:20px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:25px}.section h2{font-size:clamp(1.9rem,3.5vw,2.8rem);letter-spacing:-1px;margin:10px 0}.section-heading p{color:#697b96;margin:0;line-height:1.6}.pill{padding:11px 16px;border-radius:25px;background:#fff1da;color:#aa6819;font-weight:900;white-space:nowrap}.pill.lavender{background:#eee9ff;color:#6450c0}.play-grid{display:grid;grid-template-columns:300px 1fr;gap:22px}.panel{background:#fff;border-radius:24px;padding:30px;box-shadow:0 9px 35px #253c680d;border:1px solid #edf0f8}.controls label,.worksheet-panel label{font-weight:900;display:block;margin-bottom:10px}.controls select,.worksheet-panel select{width:100%;padding:14px;border-radius:12px;border:2px solid #e3e9f4;background:white;color:#263b5b;margin-bottom:24px}.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);text-align:center;gap:5px;margin:0 0 24px}.mini-stats span{font-size:1.8rem;color:#6652ca;font-weight:1000;display:block}.mini-stats small{color:#76869c}.question-panel{text-align:center}.question-top{display:flex;justify-content:space-between;font-size:.8rem;letter-spacing:1px;font-weight:900;color:#7a88a0}.question-top span:last-child{color:#ffb637;font-size:1.2rem;letter-spacing:3px}.equation{font-size:clamp(2.8rem,7vw,5rem);font-weight:1000;letter-spacing:-2px;margin:35px 0}.answer-row{display:flex;gap:12px;max-width:440px;margin:auto}.answer-row input{width:100%;min-width:0;padding:14px 17px;border:2px solid #d9e1ef;border-radius:15px;font-size:1.3rem;outline-offset:3px}.feedback{min-height:30px;font-weight:900;color:#536b91}.feedback.good{color:#22835e}.feedback.bad{color:#b35145}.text-button{border:0;background:none;color:#6755c2;font-weight:900;margin-top:10px}.learning-panel{background:#f4f0ff;border-radius:12px;padding:14px;margin-top:20px;color:#5947b1;line-height:1.8}.mtc-section{max-width:1130px}.mtc-card{text-align:center;background:#f1edff;padding:45px 30px}.mtc-icon{font-size:3.2rem}.mtc-card h3{font-size:1.9rem;margin:12px 0}.mtc-card p{max-width:620px;line-height:1.7;margin:14px auto 24px;color:#55657c}.fine-print{font-size:.83rem}.mtc-meta{display:flex;justify-content:space-between;font-size:1.1rem}.timer-track{height:12px;border-radius:10px;background:#d6d0ed;overflow:hidden;margin:18px 0}.timer-track>div{height:100%;background:#7661dc;width:100%;transition:width .1s linear}.result-score{font-size:3rem;font-weight:1000;color:#6450c0!important}.worksheet-panel{display:grid;grid-template-columns:1fr 1fr auto;gap:20px;align-items:end}.worksheet-panel select{margin:0}.worksheet-panel .btn{margin-bottom:2px}.story{background:#1d355d;color:white;border-radius:26px;margin:55px auto;padding:55px}.story .kicker{color:#ffca74}.story p{line-height:1.8;max-width:770px;color:#e0e8f5}.story-quote{font-size:1.5rem;font-weight:1000;color:#ffd077;margin-top:30px}.adult p{line-height:1.7;color:#687991}footer{background:#172d54;color:#dfe7f5;padding:40px 5%;text-align:center;margin-top:40px}footer .brand{color:white}footer small{color:#adbed5}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #6e5bd6;outline-offset:3px}@media(max-width:760px){.site-header{flex-direction:column;padding:16px}.site-header nav{gap:13px;flex-wrap:wrap;justify-content:center;font-size:.82rem}.hero{grid-template-columns:1fr;padding-top:40px}.hero-art{height:270px}.mascot{width:135px;height:135px;font-size:3.5rem}.hero h1{letter-spacing:-1.5px}.intro{grid-template-columns:1fr;gap:12px}.intro>div{padding:18px}.section{padding:35px 5%}.section-heading{align-items:start;flex-direction:column}.play-grid,.worksheet-panel{grid-template-columns:1fr}.panel{padding:23px}.equation{margin:28px 0}.answer-row{flex-direction:column}.story{margin:35px 5%;padding:30px}.worksheet-panel .btn{width:100%}}@media print{.site-header,main,footer{display:none!important}#printArea{display:block!important;color:black;font-family:Arial,sans-serif;padding:15mm}#printArea h1{font-size:26pt}#printArea .sheet-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 60px;font-size:15pt}#printArea .sheet-footer{margin-top:30px;font-size:10pt}}#printArea{display:none}

/* Theme picker and dark palette */
.theme-switch{display:flex;align-items:center;gap:8px;font-weight:800;font-size:.82rem;white-space:nowrap}
.theme-switch select{border:2px solid #d6def0;border-radius:12px;padding:9px;background:#fff;color:#243b60;font-weight:800;cursor:pointer}
@media(max-width:900px){.site-header{flex-wrap:wrap}.site-header nav{gap:13px}}
:root[data-theme="dark"]{color-scheme:dark}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]):not([data-theme="dark"]){color-scheme:dark}}
:root[data-theme="dark"] body{background:#101b2d;color:#f0f5ff}
:root[data-theme="dark"] .site-header{background:#192941}
:root[data-theme="dark"] .brand{color:#f2f6ff}
:root[data-theme="dark"] .hero-copy>p,:root[data-theme="dark"] .hero-note,:root[data-theme="dark"] .adult p{color:#c0cde0}
:root[data-theme="dark"] .hero h1 em{color:#bbaaff}
:root[data-theme="dark"] .intro>div,:root[data-theme="dark"] .panel,:root[data-theme="dark"] .orbit{background:#203450;color:#f3f7ff}
:root[data-theme="dark"] .intro p,:root[data-theme="dark"] .section-heading p,:root[data-theme="dark"] .mtc-card p,:root[data-theme="dark"] .mini-stats small,:root[data-theme="dark"] .question-top{color:#bdcbe1}
:root[data-theme="dark"] .light,:root[data-theme="dark"] .learning-panel,:root[data-theme="dark"] .mtc-card{background:#2a315b;color:#f2edff}
:root[data-theme="dark"] .outline,:root[data-theme="dark"] .theme-switch select,:root[data-theme="dark"] select,:root[data-theme="dark"] input{background:#1b2b43;color:#f4f8ff;border-color:#526681}
:root[data-theme="dark"] .feedback{color:#d1def5}
:root[data-theme="dark"] .feedback.good{color:#7be5b6}
:root[data-theme="dark"] .feedback.bad{color:#ffad9f}
:root[data-theme="dark"] .text-button{color:#c5b6ff}
:root[data-theme="dark"] .mini-stats span,:root[data-theme="dark"] .result-score{color:#c5b6ff!important}
:root[data-theme="dark"] .story{background:#1d355d}
:root[data-theme="dark"] .bubble{color:#20364e}
:root[data-theme="dark"] .orbit strong{color:#ffb65e}
:root[data-theme="dark"] .skip{background:#203450;color:#fff}
@media(prefers-color-scheme:dark){
:root:not([data-theme="light"]):not([data-theme="dark"]) body{background:#101b2d;color:#f0f5ff}
:root:not([data-theme="light"]):not([data-theme="dark"]) .site-header{background:#192941}
:root:not([data-theme="light"]):not([data-theme="dark"]) .brand{color:#f2f6ff}
:root:not([data-theme="light"]):not([data-theme="dark"]) .hero-copy>p,:root:not([data-theme="light"]):not([data-theme="dark"]) .hero-note,:root:not([data-theme="light"]):not([data-theme="dark"]) .adult p{color:#c0cde0}
:root:not([data-theme="light"]):not([data-theme="dark"]) .hero h1 em{color:#bbaaff}
:root:not([data-theme="light"]):not([data-theme="dark"]) .intro>div,:root:not([data-theme="light"]):not([data-theme="dark"]) .panel,:root:not([data-theme="light"]):not([data-theme="dark"]) .orbit{background:#203450;color:#f3f7ff}
:root:not([data-theme="light"]):not([data-theme="dark"]) .intro p,:root:not([data-theme="light"]):not([data-theme="dark"]) .section-heading p,:root:not([data-theme="light"]):not([data-theme="dark"]) .mtc-card p,:root:not([data-theme="light"]):not([data-theme="dark"]) .mini-stats small,:root:not([data-theme="light"]):not([data-theme="dark"]) .question-top{color:#bdcbe1}
:root:not([data-theme="light"]):not([data-theme="dark"]) .light,:root:not([data-theme="light"]):not([data-theme="dark"]) .learning-panel,:root:not([data-theme="light"]):not([data-theme="dark"]) .mtc-card{background:#2a315b;color:#f2edff}
:root:not([data-theme="light"]):not([data-theme="dark"]) .outline,:root:not([data-theme="light"]):not([data-theme="dark"]) .theme-switch select,:root:not([data-theme="light"]):not([data-theme="dark"]) select,:root:not([data-theme="light"]):not([data-theme="dark"]) input{background:#1b2b43;color:#f4f8ff;border-color:#526681}
:root:not([data-theme="light"]):not([data-theme="dark"]) .feedback{color:#d1def5}
:root:not([data-theme="light"]):not([data-theme="dark"]) .feedback.good{color:#7be5b6}
:root:not([data-theme="light"]):not([data-theme="dark"]) .feedback.bad{color:#ffad9f}
:root:not([data-theme="light"]):not([data-theme="dark"]) .text-button{color:#c5b6ff}
:root:not([data-theme="light"]):not([data-theme="dark"]) .mini-stats span,:root:not([data-theme="light"]):not([data-theme="dark"]) .result-score{color:#c5b6ff!important}
:root:not([data-theme="light"]):not([data-theme="dark"]) .bubble{color:#20364e}
:root:not([data-theme="light"]):not([data-theme="dark"]) .orbit strong{color:#ffb65e}
}
@media print{body{background:white!important;color:black!important}}

/* AceBop 2.0 */
.progress-shell{margin:0 0 22px}.progress-caption{display:flex;justify-content:space-between;gap:10px;font-size:.82rem;font-weight:900;color:#637594;margin-bottom:8px}.progress-track{height:12px;background:#e5eafa;border-radius:999px;overflow:hidden}.progress-track>div{height:100%;width:0;background:#ffad3e;transition:width .3s}.round-summary{padding:15px;border-radius:16px;background:#f0f7ff;color:#263e6b;line-height:1.6;margin:12px auto;max-width:530px}.round-summary strong{display:block;font-size:1.1rem}.breakdown{margin:22px auto;max-width:680px;text-align:left}.breakdown h4{margin:18px 0 10px}.breakdown-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:8px}.breakdown-item{border-radius:12px;background:#fff;padding:10px;font-weight:800;color:#273f63}.breakdown-item.wrong{border:1px solid #f2c0b6}.breakdown-item.right{border:1px solid #a5dfc2}.worksheet-panel{grid-template-columns:1fr 1fr 1fr auto}.worksheet-actions{display:flex;flex-direction:column;gap:12px}.check-label{display:flex!important;align-items:center;gap:8px;font-size:.86rem;margin:0!important;white-space:nowrap}.check-label input{width:18px;height:18px}.progress-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:18px}.progress-cards .panel{text-align:center;display:flex;flex-direction:column;gap:8px}.progress-cards strong{font-size:2.5rem;color:#6652ca}.progress-cards span{color:#677a97;font-weight:800}.achievement-panel h3{margin-top:0}.achievements{display:flex;flex-wrap:wrap;gap:10px}.achievement{border-radius:14px;padding:12px 15px;background:#eef0fb;color:#394c6b;font-weight:900}.achievement.unlocked{background:#fff0ce;color:#8a5817}.achievement small{display:block;font-weight:600;margin-top:4px}.sheet-answer-title{break-before:page;page-break-before:always}.sheet-answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 40px}.sheet-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 45px}.sheet-grid>div{break-inside:avoid}#printArea .sheet-answer-title{margin-top:20px}
:root[data-theme="dark"] .round-summary,:root[data-theme="dark"] .breakdown-item,:root[data-theme="dark"] .achievement{background:#273e5d;color:#eaf2ff}:root[data-theme="dark"] .progress-cards span,:root[data-theme="dark"] .progress-caption{color:#c0cde0}:root[data-theme="dark"] .progress-cards strong{color:#c5b6ff}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]):not([data-theme="dark"]) .round-summary,:root:not([data-theme="light"]):not([data-theme="dark"]) .breakdown-item,:root:not([data-theme="light"]):not([data-theme="dark"]) .achievement{background:#273e5d;color:#eaf2ff}:root:not([data-theme="light"]):not([data-theme="dark"]) .progress-cards span,:root:not([data-theme="light"]):not([data-theme="dark"]) .progress-caption{color:#c0cde0}}
@media(max-width:760px){.worksheet-panel,.progress-cards{grid-template-columns:1fr}.check-label{white-space:normal}}
@media print{#printArea{display:block!important;background:#fff!important;color:#000!important;padding:8mm!important}#printArea .sheet-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 35px}#printArea .sheet-answer-title{break-before:page;page-break-before:always}#printArea .sheet-answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 30px}#printArea .sheet-footer{font-size:9pt}#printArea h1{font-size:23pt}#printArea h2{font-size:19pt}}

/* AceBop 2.1: balanced, predictable A4 worksheet pagination. */
@media print {
  @page { size: A4 portrait; margin: 12mm; }
  html,body { margin:0!important; padding:0!important; background:#fff!important; color:#111!important; }
  #printArea { display:block!important; margin:0!important; padding:0!important; width:100%!important; font-family:Arial,Helvetica,sans-serif!important; color:#111!important; }
  #printArea .worksheet-page { box-sizing:border-box; height:268mm; display:flex; flex-direction:column; break-after:page; page-break-after:always; overflow:hidden; }
  #printArea .worksheet-page:last-child { break-after:auto; page-break-after:auto; }
  #printArea .worksheet-page-header { flex:none; }
  #printArea .worksheet-page h1 { margin:0 0 5mm; font-size:22pt; line-height:1.15; }
  #printArea .worksheet-page-header p { font-size:11pt; margin:0 0 9mm; line-height:1.4; }
  #printArea .worksheet-page-grid { flex:1; min-height:0; display:grid; grid-template-columns:1fr 1fr; grid-template-rows:repeat(10,minmax(0,1fr)); grid-auto-flow:row; column-gap:12mm; row-gap:0; align-items:center; font-size:16pt; }
  #printArea .worksheet-question { min-width:0; break-inside:avoid; page-break-inside:avoid; white-space:nowrap; }
  #printArea .worksheet-page-grid.answer-grid { font-size:15pt; }
  #printArea .worksheet-page-footer { flex:none; border-top:1px solid #d6d6d6; padding-top:3mm; margin-top:5mm; font-size:9pt; color:#444; }
}

/* AceBop 2.2: extra worksheet control and division section */
.worksheet-panel{grid-template-columns:repeat(4,minmax(0,1fr)) auto}
@media(max-width:900px){.worksheet-panel{grid-template-columns:repeat(2,minmax(0,1fr))}.worksheet-actions{grid-column:1/-1;align-items:flex-start}}
@media(max-width:600px){.worksheet-panel{grid-template-columns:1fr}.worksheet-actions{grid-column:auto}}