:root{--sky-top:#9fd6f5;--sky-mid:#cfeefc;--sky-bottom:#fff4d6;--grass:#63b85a;--grass-dark:#3f8f45;--path:#f0cf7a;--path-edge:#c9953c;--ink:#1b3344;--ink-soft:#3d5a6c;--paper:#fffaf0;--card:#ffffff;--accent:#ef7b3a;--accent-dark:#c45c22;--teal:#1c7d70;--gold:#f2c14e;--locked:#6d7f78;--lock-bg:#e4ebe7;--shadow:0 8px 24px rgba(27,51,68,0.12);--radius:18px;--tap:48px;--font:system-ui,"Segoe UI",ui-rounded,"Avenir Next",sans-serif}*,:after,:before{box-sizing:border-box}body,html{margin:0;min-height:100%;color:var(--ink);font-family:var(--font);background:linear-gradient(180deg,var(--sky-top) 0,var(--sky-mid) 42%,var(--sky-bottom) 100%);background-attachment:fixed}body{line-height:1.5;-webkit-font-smoothing:antialiased}:focus-visible{outline:3px solid var(--ink);outline-offset:3px}a{color:var(--teal);text-underline-offset:3px}.btn,button{font:inherit}.skip-link{position:absolute;left:12px;top:-40px;z-index:20;background:var(--card);color:var(--ink);padding:8px 14px;border-radius:8px;min-height:var(--tap);display:inline-flex;align-items:center}.skip-link:focus{top:12px}.shell{min-height:100dvh;display:flex;flex-direction:column}.sky-deco{pointer-events:none;position:fixed;inset:0;overflow:hidden;z-index:0}.cloud{position:absolute;background:rgba(255,255,255,.72);border-radius:40px;height:36px;filter:blur(.2px)}.cloud:after,.cloud:before{content:"";position:absolute;background:inherit;border-radius:50%}.cloud:before{width:42px;height:42px;left:16px;top:-20px}.cloud:after{width:54px;height:54px;left:44px;top:-28px}.cloud-a{width:130px;top:8%;left:6%;animation:drift 36s linear infinite}.cloud-b{width:100px;top:14%;right:8%;left:auto;animation:drift 48s linear infinite reverse}.cloud-c{width:160px;top:22%;left:55%;animation:drift 54s linear infinite}@keyframes drift{0%{transform:translateX(0)}to{transform:translateX(24px)}}.main,.site-footer,.site-header{position:relative;z-index:1}.site-header{flex-wrap:wrap;justify-content:space-between;padding:16px 20px 8px;max-width:960px;margin:0 auto;width:100%}.brand,.site-header{display:flex;align-items:center;gap:12px}.brand{color:inherit;text-decoration:none;min-height:var(--tap)}.brand-mark{width:48px;height:48px;flex:none}.brand-text{display:flex;flex-direction:column}.brand-name{font-weight:800;letter-spacing:-.02em;font-size:1.15rem}.brand-tag{font-size:.9rem;color:var(--ink-soft)}.header-tools{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.lang-switcher{display:flex;gap:6px;background:rgba(255,250,240,.8);border:2px solid rgba(27,51,68,.12);border-radius:999px;padding:4px}.lang-btn{min-width:var(--tap);min-height:var(--tap);border:0;border-radius:999px;background:transparent;color:var(--ink);font-weight:700;cursor:pointer}.lang-btn[aria-pressed=true]{background:var(--teal);color:#fff}.btn,.icon-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:var(--tap);padding:0 18px;border-radius:999px;border:2px solid rgba(27,51,68,.14);background:var(--paper);color:var(--ink);text-decoration:none;font-weight:700;cursor:pointer}.btn-primary{background:var(--accent);border-color:var(--accent-dark);color:#fff}.btn-primary:hover{background:var(--accent-dark)}.main{flex:1 1;width:100%;max-width:960px;margin:0 auto;padding:8px 20px 48px}.hero{text-align:center;padding:12px 8px 28px}.hero h1{margin:0 0 8px;font-size:clamp(1.8rem,4vw,2.6rem);letter-spacing:-.03em}.hero .tagline{margin:0 0 10px;font-size:1.25rem;font-weight:650}.hero .pitch{margin:0 auto 16px;max-width:38rem;color:var(--ink-soft)}.free-note{margin:18px 0 0;text-align:center;font-weight:650;color:var(--ink-soft)}.map-board{background:var(--paper);border-radius:28px;box-shadow:var(--shadow);padding:24px 16px 32px;border:3px solid rgba(201,149,60,.35);position:relative}.map-board h2{margin:0 0 6px;text-align:center;font-size:1.6rem}.map-sub{margin:0 auto 20px;text-align:center;max-width:36rem;color:var(--ink-soft)}.world-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:0;position:relative}.world-list:before{content:"";position:absolute;top:28px;bottom:28px;left:42px;width:10px;background:var(--path);border:2px solid var(--path-edge);border-radius:99px;z-index:0}.world{position:relative;z-index:1;display:grid;grid-template-columns:84px 1fr;grid-gap:8px;gap:8px;align-items:stretch;margin:0;padding:6px 0}.world:nth-child(2n){grid-template-columns:1fr 84px}.world:nth-child(2n) .world-marker{order:2}.world:nth-child(2n) .world-card{order:1;margin-left:84px;margin-right:0}.badge,.world-marker{display:flex;align-items:center;justify-content:center}.badge{width:68px;height:68px;border-radius:50%;font-weight:800;font-size:1.35rem;border:4px solid var(--path-edge);background:var(--gold);color:var(--ink);box-shadow:0 4px 0 var(--path-edge)}.world.is-locked .badge{background:var(--lock-bg);border-color:#b3c0ba;box-shadow:0 4px 0 #9aaea6;color:var(--locked)}.world-card{background:var(--card);border-radius:var(--radius);padding:14px 16px;border:2px solid rgba(27,51,68,.1);min-height:88px;margin-right:8px}.world.is-open .world-card{border-color:var(--teal);box-shadow:0 0 0 3px rgba(28,125,112,.15)}.world-card h3{margin:0 0 4px;font-size:1.1rem}.world-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 6px;font-size:.85rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em}.status-open{color:var(--teal)}.status-locked{color:var(--locked)}.world-blurb{margin:0 0 10px;color:var(--ink-soft)}.world-card .btn{width:100%}.coming-soon,.lock-hint{margin:0;color:var(--ink-soft);font-size:.95rem}.lock-row{display:flex;align-items:center;gap:8px;color:var(--locked);font-weight:650}.privacy-card,.settings-card{background:var(--paper);border-radius:28px;box-shadow:var(--shadow);padding:28px 22px 36px;border:3px solid rgba(201,149,60,.35);max-width:720px;margin:0 auto}.privacy-card h1,.settings-card h1{margin:0 0 10px}.lede{color:var(--ink-soft);margin:0 0 22px}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-top:1px solid rgba(27,51,68,.1)}.setting-copy{flex:1 1}.setting-copy h2{margin:0 0 4px;font-size:1.1rem}.setting-copy p{margin:0;color:var(--ink-soft)}.switch{flex:none;min-width:88px;min-height:var(--tap);border-radius:999px;border:2px solid var(--teal);background:var(--teal);color:#fff;font-weight:800;cursor:pointer}.switch[aria-checked=false]{background:var(--lock-bg);border-color:#9aaea6;color:var(--ink)}.lang-block{padding-bottom:8px}.privacy-card h2{margin:22px 0 8px;font-size:1.15rem}.privacy-card p{margin:0 0 8px}.site-footer{padding:12px 20px 28px;text-align:center;color:var(--ink-soft)}.site-footer nav{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}.site-footer a{min-height:var(--tap);display:inline-flex;align-items:center;padding:0 8px;color:var(--ink);font-weight:650}.reduce-motion .cloud,.reduce-motion .cloud-a,.reduce-motion .cloud-b,.reduce-motion .cloud-c{animation:none}@media (prefers-reduced-motion:reduce){*,:after,:before{animation:none!important;transition:none!important;scroll-behavior:auto!important}}@media (max-width:640px){.world,.world:nth-child(2n){grid-template-columns:84px 1fr}.world:nth-child(2n) .world-marker{order:0}.world:nth-child(2n) .world-card{order:0;margin-left:0;margin-right:8px}}a.world-card{color:inherit;text-decoration:none;display:block}a.world-card:focus-visible,a.world-card:hover{border-color:var(--teal)}.region-meta{margin:0 0 10px;font-size:.85rem;font-weight:700;color:var(--ink-soft)}.card-cta{display:inline-flex;align-items:center;min-height:var(--tap);font-weight:800;color:var(--teal)}.later-title{margin:32px 0 8px;text-align:center;font-size:1.25rem}.later-list{margin-top:8px}.world.is-later .badge{background:var(--lock-bg);border-style:dashed;font-size:1.6rem;letter-spacing:.05em}.back-row{margin:0 0 16px}.region-lock-banner{justify-content:center;margin:0 auto 16px;max-width:36rem;text-align:center}.skill-list .world-card{text-decoration:none;color:inherit}.skill-stars{display:flex;align-items:center;gap:8px;margin:6px 0 0}.star-row{letter-spacing:2px;font-size:1.15rem}.star{color:#c5bba8}.star.is-on{color:#d4a017}.play-card{background:var(--paper);border-radius:28px;box-shadow:var(--shadow);padding:24px 18px 32px;border:3px solid rgba(201,149,60,.35);max-width:40rem;margin:0 auto}.play-card h1{margin:0 0 12px;font-size:1.45rem;letter-spacing:-.02em}.play-kicker,.problem-progress{margin:0 0 6px;font-weight:700;color:var(--ink-soft)}.prompt{font-size:1.25rem;font-weight:750}.math-block{margin:8px 0 18px;overflow-x:auto;text-align:center;font-size:1.25rem}.example-title{font-size:1.1rem;margin:16px 0 8px}.answer-label{display:flex;flex-direction:column;gap:6px;font-weight:700;margin:12px 0}.answer-input{font:inherit;font-size:1.35rem;padding:10px 14px;border-radius:14px;border:2px solid rgba(27,51,68,.2);background:var(--card);min-height:var(--tap);width:100%}.play-actions{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}.answer-key,.feedback-no,.feedback-ok,.hint-box{border-radius:14px;padding:12px 14px}.hint-box{background:#fff4d6;border:2px solid rgba(201,149,60,.4)}.feedback-ok{background:#e5f6ea;border:2px solid #3f8f45;font-weight:700}.feedback-no{background:#fdece6;border:2px solid var(--accent-dark);font-weight:700}.steps{margin:10px 0 0;padding-left:1.2rem}.star-summary{display:flex;align-items:center;gap:12px;font-size:1.2rem;font-weight:700}.num-pad{display:grid;grid-template-columns:repeat(3,minmax(64px,1fr));grid-gap:8px;gap:8px;margin:8px 0 12px;max-width:22rem}.pad-key{min-height:var(--tap);border-radius:14px;border:2px solid rgba(27,51,68,.14);background:var(--card);font:inherit;font-weight:800;font-size:1.2rem;cursor:pointer}.pad-key:disabled{opacity:.55;cursor:not-allowed}.pad-submit,.pad-wide{grid-column:span 2}.pad-submit{background:var(--accent);border-color:var(--accent-dark);color:#fff}.choice-row{display:flex;flex-wrap:wrap;gap:10px;margin:12px 0}.choice-btn[aria-pressed=true]{background:var(--teal);color:#fff;border-color:var(--teal)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media (prefers-reduced-motion:reduce){.btn,.cloud,.pad-key{animation:none!important;transition:none!important}}html.reduce-motion .btn,html.reduce-motion .cloud,html.reduce-motion .pad-key{animation:none!important;transition:none!important}