:root{font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;color:#293e35;background:#fcfbf7;font-synthesis:none;--green:#42785d;--muted:#859088;--border:#e7e9df}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.6}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #bd8733;outline-offset:4px}header{height:98px;max-width:1240px;margin:auto;display:flex;align-items:center;gap:66px;padding:0 32px;border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:12px;font-size:21px;font-weight:800;letter-spacing:1px;white-space:nowrap}.brand small{display:block;font-size:10px;letter-spacing:2px;margin-top:5px;color:#718a78}.brand-icon{display:flex;align-items:center;justify-content:center;background:var(--green);color:white;width:44px;height:46px;border-radius:15px;font-size:37px;line-height:1}.brand-icon span{color:#f4d275;font-size:24px;align-self:flex-start;margin-top:5px}nav{display:flex;gap:34px;height:100%;align-items:center;font-size:14px}nav a{height:100%;display:flex;align-items:center;gap:6px;position:relative;color:#758278}nav a.active{color:var(--green);font-weight:700}nav a.active:after{content:"";position:absolute;height:3px;border-radius:3px;background:var(--green);bottom:20px;left:0;right:0}#review-count{font-size:11px;background:#edf0e7;border-radius:5px;padding:2px 5px}.guest{margin-left:auto;font-size:12px;color:#8a968d}main{max-width:1176px;margin:auto;padding:0 0 48px}.welcome{display:grid;grid-template-columns:1.15fr 1fr;align-items:center;padding:56px 30px 44px;min-height:425px}.eyebrow{font-size:11px;color:#789280;letter-spacing:2.2px;font-weight:700}h1{font-size:39px;line-height:1.55;letter-spacing:-1px;margin:16px 0}h1 span{color:var(--green)}p{line-height:1.8;color:#7a867e;font-size:14px}.welcome p{margin:16px 0 27px}.primary{display:inline-flex;align-items:center;justify-content:center;gap:28px;background:var(--green);border:1px solid var(--green);color:white;padding:14px 23px;border-radius:10px;font-size:14px;min-height:46px;box-shadow:0 4px 0 #315f4914}.primary:hover{background:#34684d}.secondary{display:inline-flex;align-items:center;justify-content:center;background:#fff;border:1px solid #dce4d9;color:var(--green);border-radius:9px;padding:11px 18px;min-height:44px;font-size:14px}.hero-note{display:flex;align-items:center;gap:12px;font-size:11px;color:#90998d;margin-top:22px}.mini-faces{background:#f4e5c8;border-radius:20px;padding:6px 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Georgia,serif;color:#91a082}.spark{position:absolute;color:#d9b770;font-size:31px}.one{top:10px;left:102px}.two{top:54px;right:22px}.cloud{color:#e7e8de;font-size:56px;left:4px;top:18px;position:absolute}.sprout{position:absolute;bottom:25px;right:0;font-size:52px}.stats{display:flex;align-items:center;border:1px solid var(--border);background:#fff;border-radius:15px;padding:19px 30px;gap:45px;margin-bottom:44px}.stats>div{display:flex;align-items:center;gap:14px;flex:1}.stat-icon{height:44px;width:44px;border-radius:12px;display:grid;place-items:center;font-size:22px}.stats p{margin:0;font-size:12px}.stats b{font-size:24px;color:#344e3e;margin-right:4px}.stats small{display:block;font-size:11px;line-height:1.5;color:#98a095}.stats>a{font-size:12px;color:#7f927f;border-left:1px solid var(--border);padding-left:30px}.stats>a span{margin-left:15px}.mint{background:#e9f0e4;color:#5a8466}.peach{background:#faebdf;color:#b4815c}.lavender{background:#eeebf5;color:#9180ae}.yellow{background:#f6f0d9;color:#a8924e}.section-title{display:flex;align-items:center;justify-content:space-between;margin:34px 0 21px;gap:16px}.section-title h2{font-size:23px;letter-spacing:.2px;margin:8px 0 0}.section-title>a,.section-title>.muted{font-size:12px;color:#81927f}.path-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.path-grid a{display:flex;align-items:center;gap:15px;padding:23px 20px;background:white;border:1px solid var(--border);border-radius:13px}.path-grid h3{font-size:16px;margin:0}.path-grid p{font-size:11px;margin:7px 0 0}.path-grid b{margin-left:auto;color:#9ca995;font-weight:400}.step{font:20px 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20px}.progress{background:#edf0e8;height:5px;border-radius:6px;overflow:hidden}.progress i{display:block;background:#80a57b;height:100%;border-radius:6px}.lesson-bottom{display:flex;justify-content:space-between;margin-top:12px;font-size:11px;color:#9da595}.lesson-bottom b{font-weight:500;color:#759071}.tip{margin-top:38px;background:#f1f3e9;border:1px solid #e7ebdb;border-radius:12px;padding:22px 30px;display:flex;align-items:center;gap:18px}.tip>span:first-child{font-size:32px}.tip b{font-size:14px;color:#657c55}.tip p{font-size:12px;margin:5px 0 0;color:#96a086}.tip-drawing{margin-left:auto;font:italic 23px Georgia;color:#aab69a}footer{max-width:1176px;margin:auto;border-top:1px solid var(--border);padding:24px 0 30px;font-size:11px;color:#a1a797;display:flex;justify-content:space-between}.page-heading{padding:44px 0 20px}.page-heading h1{font-size:32px;margin:12px 0}.page-heading p{font-size:15px}.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:25px}.tabs button{border:1px solid var(--border);background:white;color:#778a77;border-radius:8px;padding:11px 19px;font-size:14px}.tabs button.active{background:var(--green);color:white;border-color:var(--green)}.phonics-layout{display:grid;grid-template-columns:1fr 280px;gap:28px;align-items:start}.sound-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.sound{min-height:120px;border:1px solid var(--border);background:white;border-radius:12px;color:#426e51;padding:16px 8px}.sound b{display:block;font-size:25px;font-weight:500}.sound span{display:block;font-size:13px;margin-top:10px;color:#8c9989}.sound small{font-size:10px;color:#819879}.sound.selected{background:#edf2e7;border-color:#83a37c}.sound-detail{position:sticky;top:20px;background:#eff2e7;border-radius:18px;text-align:center;padding:27px 20px}.big-sound{font-size:65px;margin-top:28px}.sound-detail h2{font-size:25px;font-weight:500}.sound-detail small{display:block;font-size:12px;color:#8c9885;line-height:1.8;margin-top:25px}.sound-detail .secondary{width:100%}.search{border:1px solid var(--border);border-radius:10px;background:white;padding:11px 15px}.search input{border:0;background:none;outline:none;font-size:14px;width:180px}.word-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.word-row{display:flex;align-items:center;text-align:left;gap:17px;border:1px solid var(--border);border-radius:12px;background:white;padding:17px 20px;color:#536951;min-width:0}.word-row>span:first-child{font-size:26px}.word-row b{font-size:17px;min-width:75px}.word-row small{display:block;font-weight:400;font-size:12px;color:#95a08b;margin-top:3px}.word-row>span:nth-child(3){font-size:14px;color:#81907b}.word-row>span:last-child,.word-row>button{margin-left:auto}.back{display:inline-block;margin-top:30px;color:#7c9178;font-size:14px}.study-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.study-card{background:white;border:1px solid var(--border);border-radius:15px;text-align:center;padding:25px 15px}.study-emoji{font-size:57px}.study-card h2{font-size:30px;margin:14px 0 0}.study-card p{margin:6px 0 20px}.segments{display:flex;justify-content:center;gap:10px;margin:20px 0}.segments>span{border-radius:8px;background:#eef2e7;padding:10px 15px;font-size:25px;color:#52784c}.segments small{display:block;font-size:13px;margin-top:6px;color:#93a287}.slow{border:0;background:none;color:#7c9075;font-size:13px;min-height:44px;padding:10px}.practice-bar{display:flex;align-items:center;justify-content:space-between;margin-top:30px;padding:25px;background:#eff2e7;border-radius:15px;gap:20px}.practice-bar p{margin:5px 0 0}.quiz-top{display:flex;justify-content:space-between;margin:30px auto 12px;max-width:700px;font-size:14px;color:#7b8c73}.quiz-progress{max-width:700px;margin:auto}.quiz{text-align:center;max-width:650px;margin:40px auto}.quiz h1{font-size:29px}.listen-button{display:block;margin:25px auto 5px;border:0;border-radius:50%;width:90px;height:90px;background:#e4eddb;color:var(--green);font-size:30px;box-shadow:0 0 0 9px #f0f4e9}.options{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:30px}.options button{padding:24px;background:white;border:1px solid #dce3d5;border-radius:12px;font-size:24px;color:#4c6748}.options small{display:block;font-size:13px;margin-top:10px;color:#8c9886}.options button:hover:enabled{background:#edf2e5}#answer-form{display:grid;gap:15px;max-width:400px;margin:25px auto}#answer-form label{font-size:14px;color:#75866c}#spelling{padding:18px;text-align:center;border:1px solid #bfcfb3;border-radius:10px;background:white;font-size:24px;min-width:0}.feedback{margin-top:25px;padding:22px;border-radius:12px}.feedback p{margin:7px 0 15px}.good{background:#e9f1e0}.wrong{background:#fcf0df}.result,.empty{text-align:center;padding:60px 20px}.result-icon,.empty>span{display:block;font-size:65px;margin-bottom:25px}.result>.eyebrow{display:block}.result h1{font-size:30px}.result-stat{font-size:70px;color:var(--green);margin:20px}.result-stat small{display:block;font-size:14px;color:#8a987e}.review-start{margin-top:25px}.muted{color:#899680}#toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);padding:15px 22px;background:#304b3f;color:white;border-radius:12px;box-shadow:0 5px 25px #0002;max-width:90vw;min-width:240px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s;z-index:5}#toast.show{opacity:1}
@media(min-width:761px) and (max-width:1250px){main,footer{margin-left:32px;margin-right:32px}.guest{display:none}header{gap:45px}.stats{gap:20px}.card-letter.c{left:250px}.path-grid a{padding:18px 14px;gap:10px}.path-grid p{font-size:12px}}
@media(max-width:760px){header{height:78px;padding:0 22px;gap:0}.brand{font-size:19px}.brand small{font-size:9px}.guest{font-size:10px}nav{position:fixed;bottom:0;left:0;right:0;height:calc(65px + env(safe-area-inset-bottom));padding:0 12px env(safe-area-inset-bottom);background:#fffefb;box-shadow:0 -3px 15px #32463108;justify-content:space-around;gap:0;z-index:4;border-top:1px solid var(--border)}nav a{font-size:13px;padding:0 9px}nav a.active:after{bottom:10px;left:9px;right:9px}main{padding:0 20px 30px}.welcome{grid-template-columns:1fr;padding:32px 3px 22px;min-height:0}.eyebrow{font-size:10px;letter-spacing:1.7px}h1{font-size:30px;line-height:1.55;margin-top:14px}.welcome p{font-size:13px;max-width:320px;margin-bottom:21px}.welcome .primary{padding:12px 20px}.hero-note{margin-top:15px}.island-art{height:242px;max-width:350px;margin-top:10px}.card-letter{width:87px;height:114px;font-size:67px;border-width:3px}.card-letter.a{left:28px;top:66px}.card-letter.b{left:129px;top:31px}.card-letter.c{left:231px;top:73px}.card-letter span{font-size:13px}.hill{height:128px;bottom:30px}.art-caption{font-size:13px;left:59px;bottom:9px}.cloud{font-size:40px;top:0}.one{left:81px;top:-6px}.two{right:11px;top:27px}.sprout{font-size:40px;bottom:25px}.stats{gap:8px;padding:17px 12px;margin-bottom:30px;border-radius:12px}.stats>div{gap:8px;justify-content:center}.stat-icon{height:30px;width:30px;font-size:16px;border-radius:8px}.stats b{font-size:21px}.stats p{font-size:10px}.stats small{font-size:10px}.stats>a{display:none}.section-title{margin:28px 0 17px}.section-title h2{font-size:20px}.section-title>.muted{display:none}.path-grid{grid-template-columns:1fr;gap:10px}.path-grid a{padding:17px}.path-grid p{font-size:12px;margin-top:4px}.path-grid h3{font-size:16px}.step{height:41px;min-width:41px}.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.lesson-art{height:121px}.emoji{font-size:50px;left:17px;bottom:7px}.letter{font-size:73px;right:15px}.unit-tag{top:12px;left:12px;font-size:9px}.lesson-info{padding:14px 12px}.lesson-info small{font-size:10px}.lesson-info h3{font-size:15px;margin:9px 0 16px}.lesson-bottom{font-size:10px;gap:4px;flex-wrap:wrap}.pill{font-size:10px;margin-left:3px}.tip{padding:18px 15px;gap:10px}.tip-drawing{display:none}.tip b{font-size:13px}.tip p{font-size:11px}.tip>span:first-child{font-size:26px}footer{margin:0 20px;padding:20px 0 calc(95px + env(safe-area-inset-bottom));display:block;font-size:10px}footer span{display:block;margin-top:8px}.page-heading{padding:30px 0 15px}.page-heading h1{font-size:27px}.page-heading p{font-size:14px}.tabs{gap:8px}.tabs button{font-size:12px;padding:10px 13px;min-height:44px}.phonics-layout{display:flex;flex-direction:column-reverse;gap:20px}.sound-detail{position:static;width:100%;padding:20px}.big-sound{font-size:48px;margin-top:15px}.sound-detail h2{margin:7px}.sound-detail p{font-size:13px;margin:8px 0}.sound-detail .secondary{width:auto;margin-left:8px}.sound-detail small{margin-top:12px;font-size:11px}.sound-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;width:100%}.sound{min-height:97px}.sound b{font-size:22px}.sound span{font-size:11px}.word-list{grid-template-columns:1fr}.search{padding:9px}.search input{width:130px;font-size:12px}.word-row{padding:15px}.study-grid{grid-template-columns:1fr 1fr;gap:12px}.study-card{padding:19px 8px}.study-emoji{font-size:45px}.study-card h2{font-size:26px}.study-card p{font-size:13px}.segments{gap:5px;margin:15px 0}.segments>span{font-size:20px;padding:8px}.segments small{font-size:11px}.study-card .secondary{padding:9px;font-size:12px}.study-card .slow{padding:7px;font-size:12px}.practice-bar{display:block;padding:22px}.practice-bar b{font-size:14px}.practice-bar p{font-size:12px}.practice-bar>.primary{margin-top:15px;width:100%}.quiz{margin-top:30px}.quiz h1{font-size:24px}.options button{font-size:23px;padding:22px 12px}.result,.empty{padding:45px 0}.result h1{font-size:25px}.result p{font-size:14px}.result .secondary{margin-top:12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Core learning surfaces */
.core-entry h2{font-size:22px;margin:0}.core-entry p{font-size:14px}.core-entry a{min-height:135px}.resume-card{display:flex;justify-content:space-between;align-items:center;gap:18px;background:#eef2e7;border:1px solid #dce6d4;padding:22px;border-radius:14px;margin-bottom:24px}.resume-card p{margin:7px 0 0}.resume-choices{display:flex;gap:14px}.history-list article{display:flex;gap:20px;align-items:center;padding:20px;border-bottom:1px solid var(--border);font-size:15px}.history-list small{margin-left:auto;color:#71816d}.history-list span{color:#71816d}.empty.compact{padding:25px}.book-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.book-card{padding:26px;border-radius:16px;border:1px solid #435a3714;transition:transform .15s}.book-card:hover{transform:translateY(-3px)}.book-card>span{font-size:14px}.book-card h2{font-size:25px;margin:12px 0}.book-card p{font-size:15px;color:inherit}.book-card>b{display:block;font-size:14px;margin-top:22px}.book-illustration{font-size:72px;margin:25px 0}.unit-list{display:grid;gap:24px}.unit-panel{background:white;border:1px solid var(--border);border-radius:16px;padding:24px}.unit-head{display:flex;align-items:center;gap:17px}.unit-head h2{font-size:21px;margin:0}.unit-head p{font-size:14px;margin:7px 0}.unit-head>div:last-child{margin-left:auto}.unit-words{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}.unit-words button{position:relative;text-align:left;background:#f7f8f2;border:1px solid #ecede5;padding:15px;border-radius:10px;color:#496146}.unit-words b{font-size:19px}.unit-words small{display:block;font-size:14px;margin-top:5px}.unit-words span{position:absolute;right:14px;top:26px}.study-focus{max-width:740px;text-align:center;padding:30px;background:white;border:1px solid var(--border);border-radius:18px;margin:auto}.study-position{display:flex;justify-content:space-between;font-size:14px;color:#7b8c72;margin-bottom:15px}.study-focus h2{font-size:44px;margin:10px 0}.study-focus p{font-size:16px}.study-focus .study-emoji{font-size:76px}.segments button{border:1px solid #dce5d5;border-radius:10px;background:#eef2e7;color:#52784c;padding:12px 16px;font-size:28px;min-width:54px;transition:background .15s}.segments button.playing{background:#eec96d;color:#493c13;box-shadow:0 0 0 3px #f8e9bd}.segments small{font-size:14px}.study-controls{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:25px}.mode-picker{display:flex;align-items:center;gap:12px;font-size:14px;margin-top:12px}select{max-width:100%;min-height:44px;font:inherit;color:#456b50;border:1px solid #d1ddc9;border-radius:8px;background:white;padding:10px}.mouth-pictures{margin:20px 0;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.mouth-pictures img{width:100%;max-height:170px;object-fit:contain;border-radius:10px;background:white}.mouth-pictures img:first-child{width:55%;max-height:90px}.mouth-pictures figcaption{font-size:13px;color:#65775f;margin-top:5px}.sound-detail .big-sound{margin-top:12px;font-size:50px}.sound-detail .primary,.sound-detail .secondary{margin-top:8px;width:auto;gap:8px;padding:10px;font-size:14px}.sound-detail iframe{width:100%;height:190px;border:0;background:#e3e6df;border-radius:10px;margin-top:15px}.media-link{display:block;font-size:13px;color:#456e53;margin:10px 0}.media-error{display:block;font-size:14px;background:#fae9d9;padding:12px;border-radius:8px}.sound-detail small{font-size:13px}.sound-detail small a{text-decoration:underline}.answer-slots,.letter-bank{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:25px 0}.answer-slots button,.letter-bank button{width:55px;height:62px;border:1px solid #c9d9c0;border-radius:10px;background:white;font-size:29px;color:#3e6246}.answer-slots button{border-bottom:4px solid #b8cdad;background:#f1f5e9}.letter-bank button{box-shadow:0 4px 0 #d2ddc9;background:#f9fbf4}.letter-bank button:disabled{opacity:.25}.quiz-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin:18px 0}.hint-box{background:#fff4dc;padding:18px;border-radius:12px}.hint-box .segments{margin:14px 0}.hint-box p{font-size:14px;margin:10px 0}.audio-status{font-size:14px;min-height:22px;color:#667d60}.result-words{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:22px}.result-words span{padding:10px 15px;border-radius:10px;font-size:16px}.review-toolbar{display:flex;justify-content:space-between;align-items:start;gap:15px}.review-toolbar label{font-size:14px;display:flex;align-items:center;gap:10px}.review-selection{display:flex;align-items:center;gap:10px;margin-bottom:15px}.review-selection>span{font-size:14px;color:#768b6e;margin-left:auto}.review-list{display:grid;gap:12px}.review-row{display:flex;align-items:center;gap:12px;border:1px solid var(--border);background:white;padding:18px;border-radius:12px}.review-row label{display:flex;align-items:center;gap:15px;flex:1;cursor:pointer}.review-row input{width:21px;height:21px;accent-color:#42785d}.review-row label>span{font-size:27px}.review-row b{font-size:19px}.review-row small{display:block;font-size:14px;font-weight:400;color:#7b8c72;margin-top:7px}.stats small{font-size:13px}.page-heading p{color:#697c65}.sound span{color:#6b7d62}.word-row small{color:#6b7d62}.quiz .muted{font-size:14px}
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