html[data-school-game]{--ink:#162923;--text:#45524d;--muted:#65716b;--accent:#16634e;--accent-dark:#104b3b;--line:#dbe2dd;--paper:#fff;--wash:#f3f6f3;--max:1200px;color:var(--ink);background:var(--paper);font-synthesis:none;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif}html[data-school-game] *{box-sizing:border-box}html[data-school-game] body{margin:0;font-size:16px;line-height:1.65}html[data-school-game] a{color:inherit;text-decoration:none}html[data-school-game] button,html[data-school-game] input{font:inherit}html[data-school-game] img{max-width:100%;height:auto;display:block}html[data-school-game] h1,html[data-school-game] h2,html[data-school-game] h3,html[data-school-game] p,html[data-school-game] figure{margin:0}html[data-school-game] h1,html[data-school-game] h2,html[data-school-game] h3{letter-spacing:-.035em;line-height:1.13}html[data-school-game] h1{font-size:clamp(2.5rem,4.7vw,4rem);font-weight:650}html[data-school-game] h2{font-size:clamp(2rem,3.5vw,3rem);font-weight:630}html[data-school-game] h3{font-size:1.35rem;font-weight:650}html[data-school-game] p{color:var(--text)}html[data-school-game] button,html[data-school-game] a,html[data-school-game] input,html[data-school-game] summary{outline-offset:5px}html[data-school-game] a:focus-visible,html[data-school-game] button:focus-visible,html[data-school-game] input:focus-visible,html[data-school-game] summary:focus-visible{outline:3px solid #267e64}html[data-school-game] .container{width:min(var(--max),calc(100% - 80px));margin-inline:auto}html[data-school-game] .skip-link{background:var(--ink);color:#fff;z-index:50;padding:12px 20px;position:fixed;top:-100px;left:20px}html[data-school-game] .skip-link:focus{top:12px}html[data-school-game] .header{border-bottom:1px solid var(--line);background:#fff}html[data-school-game] .header-inner{justify-content:space-between;align-items:center;gap:28px;min-height:88px;display:flex}html[data-school-game] .brand{letter-spacing:-.03em;white-space:nowrap;align-items:center;gap:10px;font-size:1.15rem;font-weight:700;display:inline-flex}html[data-school-game] .brand-logo{object-fit:contain;flex:none;width:64px;height:64px}html[data-school-game] .hero-brand{align-items:center;gap:22px;margin-bottom:20px;display:flex}html[data-school-game] .hero-brand img{object-fit:contain;flex:none;width:136px;height:136px}html[data-school-game] .hero-brand .eyebrow{margin:0}html[data-school-game] .about-logo{width:240px;max-width:100%;height:auto;margin:0 auto 28px}html[data-school-game] .header nav{align-items:center;gap:30px;display:flex}html[data-school-game] .header nav a{color:var(--text);padding:8px 0;font-size:.9375rem}html[data-school-game] .header nav a:hover,html[data-school-game] .header nav a[aria-current]{color:var(--accent)}html[data-school-game] .header nav a[aria-current]{box-shadow:0 2px 0 var(--accent)}html[data-school-game] .hero{grid-template-columns:1fr 1.05fr;align-items:center;gap:64px;padding-block:72px 64px;display:grid}html[data-school-game] .eyebrow{letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:20px;font-size:.75rem;font-weight:700;line-height:1.5}html[data-school-game] h1 span{color:var(--accent)}html[data-school-game] .lead{max-width:620px;margin-top:24px;font-size:1.125rem;line-height:1.65}html[data-school-game] .actions{flex-wrap:wrap;align-items:center;gap:25px;margin-top:30px;display:flex}html[data-school-game] .button{cursor:pointer;border:1px solid #0000;border-radius:7px;justify-content:center;align-items:center;gap:20px;min-height:52px;padding:13px 22px;font-size:.9375rem;font-weight:650;transition:background .18s,transform .18s;display:inline-flex}html[data-school-game] .primary{background:var(--accent);color:#fff}html[data-school-game] .primary:hover{background:var(--accent-dark)}html[data-school-game] .primary:active{transform:translateY(1px)}html[data-school-game] .secondary{border-color:var(--line);color:var(--ink);background:#fff}html[data-school-game] .secondary:hover{background:var(--wash)}html[data-school-game] .text-link{color:var(--accent);text-underline-offset:5px;font-size:.9375rem;font-weight:650;display:inline-block}html[data-school-game] .text-link:hover{text-decoration:underline}html[data-school-game] .download-meta{color:var(--muted);margin-top:16px;font-size:.8125rem}html[data-school-game] .version-note{color:var(--muted);max-width:430px;margin-top:8px;font-size:.8125rem}html[data-school-game] .hero-media{background:var(--wash);border:1px solid var(--line);border-radius:14px;padding:20px;transform:rotate(1deg);box-shadow:0 18px 48px #1532270b}html[data-school-game] .media-topline{letter-spacing:.06em;color:var(--muted);justify-content:space-between;gap:10px;margin-bottom:16px;font-size:.6875rem;display:flex}html[data-school-game] .hero-media img{background:#dff4ff;border:1px solid #cfdacf;border-radius:5px;width:100%}html[data-school-game] .hero-media figcaption{color:var(--text);margin-top:14px;font-size:.8125rem}html[data-school-game] .facts{border-block:1px solid var(--line);grid-template-columns:repeat(4,1fr);gap:24px;padding:28px 0;display:grid}html[data-school-game] .facts>div{align-items:center;gap:16px;display:flex}html[data-school-game] .facts strong{letter-spacing:-.04em;font-size:2rem;font-weight:600}html[data-school-game] .facts span{color:var(--muted);max-width:120px;font-size:.9375rem;line-height:1.35}html[data-school-game] .section{padding-block:88px}html[data-school-game] .section-heading{max-width:720px;margin-bottom:40px}html[data-school-game] .section-heading>p:not(.eyebrow){max-width:600px;margin-top:22px;font-size:1.0625rem}html[data-school-game] .story-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;display:grid}html[data-school-game] .story-image{border:1px solid var(--line);background:var(--wash);border-radius:10px;padding:10px;overflow:hidden}html[data-school-game] .story-image img{border-radius:4px;width:100%}html[data-school-game] .step-label{letter-spacing:.08em;color:var(--muted);margin-top:26px;margin-bottom:12px;font-size:.75rem}html[data-school-game] .story-grid article>p:last-child{margin-top:14px}html[data-school-game] .section-tint{background:var(--wash);border-block:1px solid var(--line)}html[data-school-game] .split-heading{justify-content:space-between;align-items:end;gap:25px;max-width:none;display:flex}html[data-school-game] .subject-list{border-top:1px solid var(--line)}html[data-school-game] .subject-list>a{border-bottom:1px solid var(--line);grid-template-columns:48px 1fr 24px;align-items:center;gap:24px;padding:24px 4px;display:grid}html[data-school-game] .subject-list>a:hover{background:#eaf0e9}html[data-school-game] .subject-list h3{letter-spacing:-.02em;font-size:1.25rem}html[data-school-game] .subject-list p{margin-top:5px}html[data-school-game] .subject-number{color:var(--accent);font-size:.875rem}html[data-school-game] .help-section{grid-template-columns:1fr 1fr;align-items:center;gap:90px;display:grid}html[data-school-game] .help-section .text-link{margin-top:22px}html[data-school-game] .small{font-size:1.0625rem}html[data-school-game] .help-example{background:var(--wash);border:1px solid var(--line);border-radius:10px;padding:40px}html[data-school-game] .label{color:var(--muted);font-size:.8125rem;font-weight:600}html[data-school-game] blockquote{letter-spacing:-.025em;margin:28px 0 20px;font-size:1.8rem;line-height:1.3}html[data-school-game] .fine{color:var(--muted);font-size:.8125rem;display:block}html[data-school-game] .help-example .fine{margin-top:20px}html[data-school-game] .cta-panel{background:#e8f0eb;border:1px solid #d0ddd4;border-radius:12px;grid-template-columns:1.4fr 1fr;align-items:center;gap:48px;margin-bottom:80px;padding:48px;display:grid}html[data-school-game] .cta-panel p:not(.eyebrow){max-width:550px;margin-top:20px}html[data-school-game] .cta-panel>div:last-child{text-align:right}html[data-school-game] .cta-panel .fine{margin-top:12px}html[data-school-game] .footer{border-top:1px solid var(--line);background:#fafbf9;padding-top:46px}html[data-school-game] .footer-inner{justify-content:space-between;gap:36px;padding-bottom:34px;display:flex}html[data-school-game] .footer-inner p{margin-top:16px;margin-bottom:8px;font-size:.9375rem}html[data-school-game] .footer nav{flex-direction:column;gap:10px;font-size:.9375rem;display:flex}html[data-school-game] .footer nav a:hover{text-decoration:underline}html[data-school-game] .footer-bottom{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;gap:24px;padding-block:20px;font-size:.75rem;display:flex}html[data-school-game] .page-intro{max-width:840px;padding-block:64px 42px}html[data-school-game] .page-intro h1{font-size:clamp(2.5rem,4.5vw,3.6rem)}html[data-school-game] .page-intro .lead{max-width:730px}html[data-school-game] .page-section{padding-block:36px 64px;scroll-margin-top:20px}html[data-school-game] .page-section+.page-section{border-top:1px solid var(--line)}html[data-school-game] .page-section>h2{margin-bottom:24px}html[data-school-game] .page-section>p{max-width:760px;margin-bottom:20px}html[data-school-game] .notice{background:var(--wash);border-left:3px solid var(--accent);border-radius:0 8px 8px 0;margin:24px 0;padding:22px 26px}html[data-school-game] .notice p+p{margin-top:12px}html[data-school-game] .notice h3{margin-bottom:10px;font-size:1.15rem}html[data-school-game] .subject-detail{border-top:1px solid var(--line);grid-template-columns:1fr 1.15fr;gap:60px;padding:36px 0;scroll-margin-top:20px;display:grid}html[data-school-game] .subject-detail h2{margin-bottom:16px;font-size:1.8rem}html[data-school-game] .subject-detail .eyebrow{margin-bottom:12px}html[data-school-game] .example{border:1px solid var(--line);border-radius:9px;padding:24px}html[data-school-game] .example h3{margin:12px 0;font-size:1.2rem}html[data-school-game] .example p{font-size:.9375rem}html[data-school-game] .example p+p{margin-top:12px}html[data-school-game] .detail-link{color:var(--accent);text-underline-offset:3px;margin-top:14px;font-size:.875rem;text-decoration:underline;display:inline-block}html[data-school-game] .learning-summary{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}html[data-school-game] .learning-summary>div{border:1px solid var(--line);border-radius:8px;padding:24px}html[data-school-game] .learning-summary strong{margin-bottom:12px;font-size:1.25rem;display:block}html[data-school-game] .learning-summary p{font-size:.9375rem}html[data-school-game] .sources{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 36px;display:grid}html[data-school-game] .sources a{border-bottom:1px solid var(--line);padding:20px 0}html[data-school-game] .sources a strong{font-size:1rem;font-weight:600;line-height:1.4;display:block}html[data-school-game] .sources a span{color:var(--muted);margin-top:7px;font-size:.875rem;display:block}html[data-school-game] .sources a:hover strong{color:var(--accent);text-decoration:underline}html[data-school-game] .two-columns{grid-template-columns:1fr 1fr;gap:24px;display:grid}html[data-school-game] .download-card{border:1px solid var(--line);background:var(--wash);border-radius:10px;padding:30px}html[data-school-game] .download-card h2{margin:10px 0 15px;font-size:1.65rem}html[data-school-game] .download-card .button{margin-top:24px}html[data-school-game] .download-card .fine{margin-top:14px}html[data-school-game] .install-steps{counter-reset:steps;margin:10px 0;padding:0;list-style:none}html[data-school-game] .install-steps>li{counter-increment:steps;border-top:1px solid var(--line);grid-template-columns:52px 1fr;gap:24px;padding:26px 0;display:grid}html[data-school-game] .install-steps>li:before{content:counter(steps);background:var(--wash);border:1px solid var(--line);width:44px;height:44px;color:var(--accent);border-radius:50%;align-self:start;place-items:center;font-weight:650;display:grid}html[data-school-game] .install-steps h3{margin-bottom:10px}html[data-school-game] .install-steps p{max-width:740px}html[data-school-game] .install-steps .text-link{margin-top:12px}html[data-school-game] .flag{vertical-align:middle;color:#14853e;width:23px;height:25px;display:inline-block}html[data-school-game] kbd{border:1px solid var(--line);background:#fafbf9;border-bottom-width:2px;border-radius:4px;padding:2px 7px;font-family:inherit;font-size:.875rem}html[data-school-game] details{border-bottom:1px solid var(--line);padding:20px 0}html[data-school-game] summary{cursor:pointer;margin-left:20px;padding-left:8px;font-size:1.0625rem;font-weight:600;list-style-position:outside}html[data-school-game] details p{max-width:770px;margin:14px 0 0 28px}html[data-school-game] details a{color:var(--accent);text-decoration:underline}html[data-school-game] .about-story{grid-template-columns:1.3fr 1fr;align-items:start;gap:64px;display:grid}html[data-school-game] .about-story h2{margin-bottom:25px}html[data-school-game] .about-story p+p{margin-top:18px}html[data-school-game] .story-aside{border:1px solid var(--line);background:var(--wash);border-radius:10px;padding:30px}html[data-school-game] .story-aside h3{margin-bottom:16px}html[data-school-game] .story-aside .button{margin-top:22px}html[data-school-game] .support-panel{border:1px solid var(--line);background:var(--wash);border-radius:12px;max-width:760px;padding:36px}html[data-school-game] .support-panel h2{margin-bottom:18px}html[data-school-game] .support-panel label{margin:24px 0 10px;font-size:.875rem;font-weight:600;display:block}html[data-school-game] .card-number{font-variant-numeric:tabular-nums;letter-spacing:.04em;width:100%;color:var(--ink);background:#fff;border:1px solid #bccdc1;border-radius:7px;padding:16px;font-size:clamp(1rem,3vw,1.5rem)}html[data-school-game] .support-panel .button{margin-top:18px}html[data-school-game] .copy-status{min-height:1.6em;color:var(--accent);margin-top:14px;font-size:.875rem}html[data-school-game] .support-panel .fine{margin-top:16px}html[data-school-game] main:focus{outline:none}html[data-school-game] .spaced{margin-top:24px}html[data-school-game] .inline-links{flex-wrap:wrap;gap:16px 24px;margin-top:20px;display:flex}@media (width<=1050px){html[data-school-game] .hero{grid-template-columns:1fr 1fr;gap:36px}html[data-school-game] .hero h1{font-size:3rem}html[data-school-game] .header nav{gap:20px}html[data-school-game] .facts>div{gap:12px}html[data-school-game] .help-section{gap:40px}html[data-school-game] .actions{gap:16px}html[data-school-game] .container{width:calc(100% - 48px)}}@media (width<=780px){html[data-school-game] .header-inner{flex-direction:column;align-items:flex-start;gap:16px;padding-block:18px}html[data-school-game] .header nav{flex-wrap:wrap;justify-content:space-between;gap:12px;width:100%}html[data-school-game] .header nav a{font-size:.875rem}html[data-school-game] .hero{grid-template-columns:1fr;gap:35px;padding-block:40px}html[data-school-game] .hero h1{max-width:650px;font-size:clamp(2.5rem,7.5vw,3.5rem)}html[data-school-game] .hero-copy{max-width:650px}html[data-school-game] .hero-media{grid-row:1;max-width:620px;transform:none}html[data-school-game] .hero-media img{object-fit:contain;max-height:440px}html[data-school-game] .facts{grid-template-columns:repeat(2,1fr);gap:24px}html[data-school-game] .facts span{max-width:none}html[data-school-game] .section{padding-block:56px}html[data-school-game] .story-grid{grid-template-columns:1fr;gap:38px}html[data-school-game] .story-grid article{grid-template-columns:1fr 1fr;align-content:start;gap:0 24px;display:grid}html[data-school-game] .story-image{grid-row:1/4}html[data-school-game] .step-label{margin-top:8px}html[data-school-game] .story-grid article>p:last-child{font-size:.9375rem}html[data-school-game] .help-section,html[data-school-game] .cta-panel,html[data-school-game] .about-story,html[data-school-game] .subject-detail{grid-template-columns:1fr;gap:28px}html[data-school-game] .split-heading{flex-direction:column;align-items:start}html[data-school-game] .cta-panel{margin-bottom:52px;padding:30px}html[data-school-game] .cta-panel>div:last-child{text-align:left}html[data-school-game] .learning-summary,html[data-school-game] .sources,html[data-school-game] .two-columns{grid-template-columns:1fr}html[data-school-game] .page-intro{padding-top:40px}html[data-school-game] .footer-bottom{flex-direction:column;gap:8px}}@media (width<=480px){html[data-school-game] .container{width:calc(100% - 36px)}html[data-school-game] .brand{font-size:1.1rem}html[data-school-game] .header nav{grid-template-columns:1fr 1fr;gap:6px 16px;display:grid}html[data-school-game] .header nav a{justify-self:start;padding:6px 0}html[data-school-game] .hero{padding-top:32px}html[data-school-game] .hero h1{font-size:2.55rem}html[data-school-game] .hero .lead{font-size:1rem}html[data-school-game] .hero .actions{flex-direction:column;align-items:stretch}html[data-school-game] .actions .text-link{padding:10px 0}html[data-school-game] .hero-media{padding:12px}html[data-school-game] .media-topline{font-size:.625rem}html[data-school-game] .facts strong{font-size:1.75rem}html[data-school-game] .facts span{font-size:.8125rem}html[data-school-game] .facts>div{flex-direction:column;align-items:start;gap:5px}html[data-school-game] .story-grid article{display:block}html[data-school-game] .step-label{margin-top:18px}html[data-school-game] .subject-list>a{grid-template-columns:25px 1fr 16px;gap:12px}html[data-school-game] .subject-list p{font-size:.9375rem}html[data-school-game] .help-example{padding:26px}html[data-school-game] .footer-inner{flex-direction:column}html[data-school-game] .page-intro h1{font-size:2.35rem}html[data-school-game] .install-steps>li{grid-template-columns:38px 1fr;gap:15px}html[data-school-game] .install-steps>li:before{width:36px;height:36px}html[data-school-game] .download-card{padding:24px}html[data-school-game] .download-card .button{width:100%}html[data-school-game] .support-panel{padding:24px}html[data-school-game] .support-panel .button{width:100%}html[data-school-game] .notice{padding:18px}html[data-school-game] .subject-detail{gap:20px}html[data-school-game] h2{font-size:2rem}html[data-school-game] .section-heading h2 br,html[data-school-game] .cta-panel h2 br{display:none}}@media (prefers-reduced-motion:reduce){html[data-school-game] *,html[data-school-game] :before,html[data-school-game] :after{scroll-behavior:auto!important;transition:none!important}}html[data-school-game]{--muted:#526159}html[data-school-game] select{font:inherit;color:var(--ink);max-width:100%}html[data-school-game] select:focus-visible{outline-offset:4px;outline:3px solid #267e64}html[data-school-game] [hidden]{display:none!important}html[data-school-game] .breadcrumbs{color:var(--muted);padding-block:22px 0;font-size:.8125rem}html[data-school-game] .breadcrumbs ol{flex-wrap:wrap;gap:7px 12px;margin:0;padding:0;list-style:none;display:flex}html[data-school-game] .breadcrumbs li+li:before{content:"›";color:var(--muted);margin-right:12px}html[data-school-game] .breadcrumbs a{text-underline-offset:3px;text-decoration:underline}html[data-school-game] .breadcrumbs li:last-child{max-width:80ch}html[data-school-game] .article-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;display:grid}html[data-school-game] .article-card{border:1px solid var(--line);background:#fff;border-radius:10px;overflow:hidden}html[data-school-game] .article-card>a{height:100%;display:block}html[data-school-game] 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