@font-face{font-family:Rounded;src:local('Arial Rounded MT Bold');font-display:swap}
:root{--ink:#344853;--muted:#84939b;--paper:#fff9ef;--orange:#f49a67;--teal:#58aaa9;--border:#eee8dc;--shadow:0 12px 40px #876c3310}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;-webkit-tap-highlight-color:transparent}button,a,input,select{touch-action:manipulation}button,select{font:inherit}button{cursor:pointer;border:0;color:inherit;background:none;min-height:44px}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #48a7bd;outline-offset:4px}button:disabled{opacity:.4;cursor:default}button:active:not(:disabled){transform:scale(.97)}[hidden]{display:none!important}.app{position:relative;max-width:1210px;margin:auto;padding:26px 38px 18px;padding-top:max(26px,env(safe-area-inset-top));padding-bottom:max(18px,env(safe-area-inset-bottom))}.header,.brand,.header-actions,.intro,.subject,.picker-heading,.lesson-topline,.trace-tools,.trace-actions,.trace-footer,.lesson-nav,.page-footer,.dialog-heading,.setting-row,.dialog-actions{display:flex;align-items:center;justify-content:space-between;gap:14px}.brand{justify-content:flex-start;text-decoration:none;color:var(--ink);font-size:21px;font-weight:800;letter-spacing:1px}.brand-icon{display:grid;place-items:center;width:49px;height:49px;border-radius:18px;background:#ffe7a5;color:#e7a842;font-size:41px;line-height:1}.brand small{display:block;margin-top:5px;font-size:9px;letter-spacing:2px;font-weight:600;color:#8e999d}.header-actions{gap:12px}.star-pill{border:1px solid #f0e6c9;background:#fffef8;padding:8px 16px;border-radius:99px;font-weight:800;font-size:18px}.parent-button{color:#879497;font-size:13px;padding:10px}.intro{margin:26px 0 22px}.eyebrow{font-size:12px;color:#9a9d8f;letter-spacing:2px}h1{font-size:29px;letter-spacing:1px;margin:9px 0 0;font-weight:800}.island-friend{display:flex;align-items:center;gap:12px}.island-friend>span{font-size:64px;filter:saturate(.75)}.island-friend>div{font-size:13px;color:#7a969a;background:#edf4ee;padding:12px 16px;border-radius:18px 18px 18px 3px}.subject-tabs{display:flex;gap:16px;margin-bottom:24px}.subject{justify-content:flex-start;flex:1;padding:16px 22px;border:2px solid #ecebe3;border-radius:20px;background:#ffffff7a;text-align:left;font-weight:750;font-size:19px;transition:background .18s,border .18s}.subject.active{border-color:#eeac82;background:#fff0e1}.subject[data-subject=letters].active{border-color:#91bebb;background:#eaf4f1}.subject-icon{font-family:Rounded,sans-serif;font-size:25px;letter-spacing:-1px;border-radius:15px;background:#ffe1b9;color:#bf8251;padding:9px;min-width:58px;text-align:center;transform:rotate(-5deg)}.letters-icon{background:#dcece8;color:#5d999d;transform:rotate(5deg);font-size:28px}.subject small{display:block;font-size:11px;letter-spacing:1px;color:#9c9b91;font-weight:500;margin-top:5px}.subject-check{margin-left:auto;color:transparent}.subject.active .subject-check{color:var(--orange)}.subject[data-subject=letters].active .subject-check{color:var(--teal)}.workspace{display:grid;grid-template-columns:232px 1fr;gap:22px;align-items:start}.lesson-picker{padding:22px 16px;border:1px solid var(--border);border-radius:24px;background:#fffefa;box-shadow:var(--shadow)}.picker-heading{align-items:flex-start;flex-direction:column;gap:6px;margin:0 5px 20px}.picker-heading strong{font-size:15px}.picker-heading>span{font-size:11px;color:#a0a7a5}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.lesson-item{position:relative;min-height:54px;background:#f6f5ef;border-radius:15px;font-family:Rounded,sans-serif;font-size:24px;color:#859096;border:2px solid transparent}.lesson-item.selected{border-color:#f0b18c;background:#fff0e5;color:#d88f64}.lesson-item.practiced::after{content:'★';position:absolute;right:3px;top:1px;font-size:11px;color:#e0b151}.picker-tip{display:flex;align-items:center;gap:10px;border-top:1px dashed #e6e9db;margin:22px 5px 0;padding-top:16px}.picker-tip>span{font-size:30px}.picker-tip p{font-size:11px;color:#9ca49c;line-height:1.8;margin:0}.lesson-panel{background:#fff;border:1px solid var(--border);border-radius:28px;box-shadow:var(--shadow);padding:23px 27px 8px;min-width:0}.mode-tabs{display:flex;background:#f6f6f2;padding:5px;border-radius:16px;gap:5px}.mode-tabs button{flex:1;border-radius:12px;font-size:14px;min-height:42px;color:#9baba9;font-weight:650}.mode-tabs button.active{background:#fff;color:#536e73;box-shadow:0 2px 9px #536e7310}.lesson-topline{margin:25px 0 19px}.lesson-topline span#lesson-kicker{font-size:9px;letter-spacing:2px;color:#aaa995;font-weight:650}h2{font-size:21px;margin:7px 0 0}.speak-button{color:#68989d;background:#edf6f6;border:1px solid #daeaea;padding:10px 17px;border-radius:15px;font-size:13px;font-weight:700;white-space:nowrap}.speak-button>span{font-size:23px;vertical-align:middle;margin-right:4px}.speak-button.speaking{animation:pulse 1s infinite}.learn-view{display:grid;grid-template-columns:1fr 1fr;gap:18px}.big-card{background:#fff3e7;border:1px solid #f8e3ce;border-radius:24px;min-height:293px;padding:20px 8px;display:flex;flex-direction:column;align-items:center;justify-content:center}.big-card #big-symbol{font-family:Rounded,'Arial Rounded MT Bold',sans-serif;font-size:147px;line-height:1.1;font-weight:750;color:#df9c75;letter-spacing:-7px}.big-card.letter-card #big-symbol{font-size:100px;letter-spacing:0;color:#71a6a1}.big-card.letter-card{background:#eef7f2;border-color:#deeee5}.big-card #symbol-word{font-size:18px;letter-spacing:1px;margin:12px 0;color:#a18d7b}.tap-hint{font-size:10px;color:#b9aa9a;letter-spacing:.5px}.meaning-card{display:flex;flex-direction:column;align-items:center;justify-content:center;background:#f8faf4;border:1px solid #edf0e3;border-radius:24px;padding:22px 12px;text-align:center}.objects{display:grid;grid-template-columns:repeat(5,1fr);gap:5px;max-width:280px;justify-content:center;align-content:center;min-height:135px;width:100%}.fruit{padding:1px;min-height:44px;font-size:35px;transition:transform .2s,opacity .2s}.fruit.counted{opacity:.48;transform:scale(.9)}.objects.letter-object{display:flex;font-size:93px;align-items:center;justify-content:center}.meaning-card>p{font-size:16px;margin:15px 0 6px;font-weight:700;color:#758874}.meaning-card>small{font-size:10px;color:#a2af9a;line-height:1.8}.primary{background:var(--teal);color:white;border-radius:15px;padding:13px 23px;font-size:15px;font-weight:700;box-shadow:0 4px 0 #408b8d;min-height:49px}.begin-button{grid-column:1/-1;width:100%;display:flex;justify-content:center;gap:35px;align-items:center;margin-top:2px;margin-bottom:8px}.begin-button span{font-size:20px}.small{padding:10px 18px;min-height:44px;font-size:13px;white-space:nowrap}.quiet-button{color:#91a1a4;font-size:13px;padding:9px 12px;border-radius:12px}.quiet-button:hover{background:#f5f7f5}.lesson-nav{border-top:1px solid #f1f0e8;margin-top:17px;padding:11px 0 2px}.lesson-nav>span{font-size:11px;color:#b2b9b6;letter-spacing:2px}.trace-tools{margin-bottom:13px;flex-wrap:wrap;gap:8px}.segmented{display:flex;background:#f5f5ee;border-radius:12px;padding:3px}.segmented button{padding:7px 14px;font-size:12px;min-height:38px;border-radius:10px;color:#a0a69d}.segmented button.active{background:white;color:#6e8d85;box-shadow:0 1px 5px #34485310}.trace-actions{gap:0}.trace-actions button{font-size:12px}.board-wrap{position:relative;background:#fffdf7;border:2px solid #f0eadb;border-radius:22px;overflow:hidden}.board-label{display:flex;justify-content:space-between;padding:13px 17px;color:#a5ada5;font-size:10px;gap:8px}.board-label span:first-child{color:#85a196}.board{position:relative;width:min(100%,370px);aspect-ratio:1;margin:0 auto 10px;touch-action:none;background:linear-gradient(transparent calc(50% - .5px),#e7e8df 50%,transparent calc(50% + .5px)),linear-gradient(90deg,transparent calc(50% - .5px),#e7e8df 50%,transparent calc(50% + .5px));border:1px dashed #e5e7dc;border-radius:12px;overscroll-behavior:contain}.board svg,.board canvas{position:absolute;width:100%;height:100%;inset:0;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}.board svg{pointer-events:none}.board canvas{z-index:2}.board .trace-success{pointer-events:none;position:absolute;right:6px;bottom:8px;padding:10px 12px;background:#ffffffee;border-radius:17px;box-shadow:0 6px 20px #788d7220;z-index:3;display:flex;gap:8px;align-items:center;color:#6b9a77;font-size:14px}.trace-success>span{font-size:28px}.trace-footer{min-height:58px;align-items:center}.trace-footer>p{font-size:12px;color:#8da29a;line-height:1.7;max-width:75%}.demo-dot{filter:drop-shadow(0 2px 3px #c7905440)}.quiz-view{text-align:center;padding:7px 0 13px;min-height:340px}.quiz-mascot{font-size:58px}.quiz-view h3{font-size:24px;margin:14px 0}.quiz-view>p{font-size:12px;color:#93a6a5}.quiz-choices{display:flex;justify-content:center;gap:16px;margin:27px 0}.quiz-option{font-family:Rounded,sans-serif;font-size:60px;width:118px;min-height:115px;border-radius:24px;background:#fff2e5;color:#d49370;border:3px solid #f8e2cf}.quiz-option.correct{border-color:#89b7a0;background:#edf8ef;color:#5a9971}.quiz-option.try-again{animation:wiggle .3s;background:#f3f3ef;border-color:#e6e7df;color:#a0a69f}.page-footer{padding:25px 4px 0;color:#aeb3a5;font-size:10px;line-height:1.7}.sky-cloud{position:fixed;width:170px;height:45px;background:#ffffff75;border-radius:50px;z-index:-1}.sky-cloud::before{content:'';position:absolute;left:30px;top:-23px;width:70px;height:70px;border-radius:50%;background:inherit}.cloud-one{left:-50px;top:160px}.cloud-two{right:-50px;top:100px;transform:scale(.8)}dialog{width:min(560px,calc(100% - 32px));border:0;border-radius:26px;padding:27px;color:var(--ink);background:#fffef9;box-shadow:0 20px 100px #34485330;max-height:88dvh;overflow:auto}dialog::backdrop{background:#34485365;backdrop-filter:blur(3px)}.dialog-heading button{font-size:29px;width:44px;background:#f1f3ef;border-radius:50%}dialog p,dialog li{font-size:13px;line-height:1.9;color:#8a9799}dialog ul{padding-left:19px}.parent-stat{display:flex;align-items:baseline;gap:12px;background:#fff1d6;padding:18px;border-radius:17px;margin:16px 0}.parent-stat strong{font-size:32px;color:#d9a348}.parent-stat span{font-size:13px;color:#a69771}.setting-row{font-size:13px;border-top:1px solid #eeeee7;padding:13px 0}select{background:#f4f6f0;border:1px solid #e6e9df;border-radius:10px;padding:10px;max-width:64%;color:#6c8780;font-size:12px;min-height:44px}.parent-note{background:#f2f6f1;padding:12px;border-radius:12px}.dialog-actions{flex-wrap:wrap}.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:#415d5a;color:#fff;padding:13px 23px;border-radius:99px;box-shadow:var(--shadow);z-index:30;font-size:13px;max-width:90vw;text-align:center}.confetti{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:25}.confetti span{position:absolute;top:25%;width:10px;height:17px;border-radius:4px;animation:fall 1.5s ease-out forwards}@keyframes fall{from{opacity:1;transform:translateY(-30px) rotate(0)}to{opacity:0;transform:translateY(65vh) rotate(320deg)}}@keyframes pulse{50%{box-shadow:0 0 0 5px #58aaa91a}}@keyframes wiggle{25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
@media(min-width:1000px) and (max-height:850px){.app{padding-top:17px}.intro{margin:19px 0 17px}.subject-tabs{margin-bottom:18px}.subject{padding:12px 22px}.lesson-topline{margin:18px 0 15px}.board{width:300px}.big-card{min-height:264px}.lesson-panel{padding-top:18px}.lesson-nav{margin-top:12px}}
@media(max-width:850px){.app{padding:22px 23px}.workspace{grid-template-columns:172px 1fr;gap:15px}.lesson-picker{padding:20px 12px}.lesson-grid{gap:7px}.lesson-item{font-size:21px;min-height:48px;border-radius:12px}.lesson-panel{padding:19px 19px 7px}.learn-view{gap:12px}.big-card{min-height:260px}.big-card #big-symbol{font-size:125px}.big-card.letter-card #big-symbol{font-size:80px}.fruit{font-size:28px}.objects{gap:0}.meaning-card>small{font-size:9px}.island-friend>div{display:none}.board{width:330px}.quiz-option{width:90px;min-height:97px;font-size:50px}.quiz-choices{gap:11px}}
@media(max-width:600px){.app{padding:17px 14px}.brand{font-size:17px}.brand small{font-size:7px;letter-spacing:1px}.brand-icon{width:40px;height:40px;font-size:34px;border-radius:13px}.header-actions{gap:3px}.star-pill{font-size:14px;padding:8px 12px}.parent-button{font-size:12px}.intro{margin:24px 3px 18px}h1{font-size:24px}.eyebrow{font-size:10px}.island-friend>span{font-size:48px}.subject-tabs{gap:10px;margin-bottom:14px}.subject{padding:12px 12px;border-radius:17px;font-size:16px;gap:10px}.subject-icon{font-size:20px;padding:8px 4px;min-width:40px;border-radius:10px}.subject small{font-size:9px;letter-spacing:0}.subject-check{display:none}.workspace{display:flex;flex-direction:column;gap:14px}.lesson-picker{width:100%;padding:13px;border-radius:19px}.picker-heading{flex-direction:row;align-items:center;margin:0 2px 11px}.picker-heading strong{font-size:12px}.picker-heading>span{font-size:10px}.lesson-grid{display:flex;overflow-x:auto;gap:7px;padding:2px 0 5px;scrollbar-width:thin}.lesson-item{min-width:45px;min-height:45px;font-size:20px}.picker-tip{display:none}.lesson-panel{width:100%;padding:15px 14px 6px;border-radius:22px}.mode-tabs button{font-size:12px}.lesson-topline{margin:20px 1px 16px}h2{font-size:19px}.speak-button{padding:8px 12px;font-size:12px}.big-card{min-height:240px}.big-card #big-symbol{font-size:117px}.big-card.letter-card #big-symbol{font-size:73px}.big-card #symbol-word{font-size:15px}.tap-hint{font-size:8px}.meaning-card{padding:14px 5px}.objects{grid-template-columns:repeat(5,1fr)}.fruit{font-size:23px;min-width:0;min-height:40px}.meaning-card>p{font-size:13px}.meaning-card>small{font-size:9px}.objects.letter-object{font-size:70px}.page-footer{font-size:9px;gap:15px}.trace-actions .quiet-button{padding:5px 7px;font-size:11px}.segmented button{padding:6px 10px}.board{width:min(100%,310px)}.board-label{font-size:9px}.quiz-option{width:84px;min-height:96px;font-size:45px}.quiz-choices{gap:9px}.quiz-view h3{font-size:21px}.trace-footer>p{max-width:65%;font-size:11px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(min-width:900px) and (max-height:850px){body[data-mode=trace] .intro{display:none}body[data-mode=trace] .subject-tabs{margin-top:17px}body[data-mode=trace] .board{width:280px}body[data-mode=trace] .trace-footer{min-height:46px}body[data-mode=trace] .lesson-topline{margin:13px 0}body[data-mode=trace] .page-footer{padding-top:13px}}