@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&family=Nunito:wght@500;600;700;800;900&display=swap');
:root{font-family:'Nunito','Noto Sans SC',sans-serif;color:#292638;background:#f8f9fd;font-synthesis:none;--purple:#5339cd;--muted:#777484;--line:#e8e6f0}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #a697f7;outline-offset:4px}header{height:94px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(6%,calc((100vw - 1160px)/2))}.brand{display:flex;align-items:center;gap:12px;font-size:29px;font-weight:900}.brand-icon{background:var(--purple);color:white;border-radius:14px;padding:2px 10px;transform:rotate(-7deg);font-size:30px}.brand small{display:block;font-size:12px;font-weight:500;letter-spacing:2px;margin-top:-5px}.header-note{font-size:14px;color:var(--muted)}.header-note span{color:#efb436;margin-left:16px;font-size:24px}main{max-width:1120px;margin:0 auto;padding:48px 24px 64px;min-height:calc(100vh - 176px)}.eyebrow{font-size:13px;letter-spacing:2px;color:var(--purple);font-weight:800}h1{font-size:38px;line-height:1.4;margin:12px 0;color:#292638;letter-spacing:-1px}p{line-height:1.8;color:var(--muted);font-size:16px}.home-intro{margin-bottom:38px}.section-label{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-size:16px;font-weight:700}.section-label span{font-size:13px;color:var(--muted);font-weight:400}.topic-card{display:grid;grid-template-columns:42% 58%;background:white;border:1px solid var(--line);border-radius:24px;overflow:hidden;max-width:900px;transition:transform .2s,box-shadow .2s}.topic-card:hover{transform:translateY(-3px);box-shadow:0 12px 35px #3530640e}.number-art{background:#eae5fc;min-height:300px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}.number-art .big{font-size:95px;font-weight:900;letter-spacing:-6px;color:var(--purple);transform:rotate(-8deg);white-space:nowrap}.number-art .word{position:absolute;bottom:50px;left:50%;transform:translateX(-50%) rotate(-8deg);background:#d4f16c;padding:7px 20px;border-radius:8px;font-size:19px;font-weight:800;color:#354014}.number-art .corner{position:absolute;top:24px;left:24px;font-size:13px;font-weight:800;color:#7564b4}.topic-content{padding:36px 40px}.pill{font-size:12px;display:inline-flex;align-items:center;background:#eef4dc;color:#586b25;padding:5px 10px;border-radius:6px;font-weight:700}h2{font-size:27px;margin:18px 0 4px}.subtitle{font-size:16px;color:var(--muted)}.skills{display:flex;gap:8px;margin:22px 0}.skills span{border:1px solid var(--line);padding:5px 12px;border-radius:8px;font-size:13px;color:#625a78}.primary{background:var(--purple);color:white;border:0;border-radius:12px;padding:13px 23px;font-weight:700;font-size:16px;display:inline-flex;align-items:center;justify-content:center;gap:20px}.primary:hover{background:#432bbb}.next-note{font-size:14px;margin-top:23px;color:#8c8997}.back{font-size:14px;color:#716987;display:inline-block;margin-bottom:25px}.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}.page-head h1{font-size:32px;margin:3px 0}.page-head p{margin:3px 0;font-size:14px}.topic-number{font-size:13px;font-weight:800;color:var(--purple);letter-spacing:1.5px}.tabs{display:flex;background:#edeaf5;padding:5px;border-radius:13px;gap:4px;flex-shrink:0}.tabs button{border:0;background:transparent;padding:12px 24px;color:#797286;font-weight:700;border-radius:9px;font-size:15px}.tabs button.active{background:white;color:var(--purple);box-shadow:0 2px 5px #3120500a}.workspace{background:white;border:1px solid var(--line);border-radius:20px;padding:26px}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:25px}.toolbar h3{font-size:17px;margin:0 0 6px}.toolbar p{font-size:13px;margin:0}.range{display:flex;gap:6px;flex-wrap:wrap}.range button{border:1px solid var(--line);background:white;border-radius:8px;font-size:13px;padding:8px 12px;color:#777181}.range button.active{background:#f0ebff;border-color:#c8bcef;color:var(--purple)}.listen-layout{display:grid;grid-template-columns:1fr 240px;gap:30px}.grid{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:8px;align-content:start}.num{aspect-ratio:1;border-radius:10px;border:1px solid #eae7f3;background:#faf9fe;color:#544f69;font-size:20px;font-weight:800;user-select:none;-webkit-user-select:none;touch-action:manipulation}.num:hover{border-color:#b3a3e5;background:#f0ebff}.num.selected{color:white;background:var(--purple);border-color:var(--purple);box-shadow:0 4px 10px #5339cd26}.readout{border-radius:15px;background:#f2eefc;min-height:320px;text-align:center;padding:28px 18px;display:flex;flex-direction:column;align-items:center;justify-content:center}.readout .caption{font-size:13px;color:#8d80b1}.readout strong{font-size:76px;color:var(--purple);line-height:1.3}.readout .spell{font-size:24px;color:#483584;font-weight:800;overflow-wrap:anywhere;max-width:100%}.sound{border:0;background:white;border-radius:50%;width:46px;height:46px;color:var(--purple);font-size:23px;margin-top:24px}.readout p{font-size:12px;margin:8px 0}.hint{font-size:13px;color:#8a8497;margin:20px 0 0;line-height:1.7}.quiz-layout{display:grid;grid-template-columns: .8fr 1.2fr;gap:32px}.challenge{background:#f2eefc;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:355px;padding:25px;text-align:center}.challenge strong{font-size:115px;color:var(--purple);line-height:1.4}.challenge span{font-size:14px;color:#8a7da9}.challenge p{font-size:14px;margin:0}.exercise h3{font-size:17px;margin:0 0 12px}.exercise-block+.exercise-block{border-top:1px solid var(--line);padding-top:24px;margin-top:24px}.step{display:inline-grid;place-items:center;border-radius:50%;background:#eee9fd;color:var(--purple);width:25px;height:25px;font-size:13px;margin-right:8px}.secondary{padding:12px 20px;border:1px solid #d4cbed;background:white;border-radius:10px;color:var(--purple);font-size:15px;font-weight:700}.secondary.recording{background:#fff0ef;color:#b94343;border-color:#eaa5a5}.exercise input{border:1px solid #dcd7e8;padding:13px 15px;border-radius:10px;min-width:0;width:100%;font-size:17px;margin-bottom:10px}.accents{display:flex;gap:7px;margin:0 0 14px}.accents button{border:1px solid var(--line);background:#faf9fe;border-radius:5px;color:#6f6586;padding:4px 11px;font-size:14px}.feedback{font-size:14px;line-height:1.6;min-height:23px;margin:12px 0 0}.feedback.good{color:#447c36}.feedback.bad{color:#b45535}.feedback.neutral{color:#777181}.quiz-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:24px;padding-top:24px;border-top:1px solid var(--line)}.quiz-bottom span{font-size:13px;color:var(--muted)}footer{max-width:1120px;padding:24px;margin:0 auto;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;color:#93909e;font-size:12px}.status{font-size:13px;color:#a45d37;margin-top:12px}:disabled{opacity:.5;cursor:not-allowed}@media(min-width:1300px){main{padding-top:58px}.home-intro{margin-bottom:45px}}@media(max-width:900px){.listen-layout{grid-template-columns:1fr}.readout{min-height:100px;flex-direction:row;gap:20px;padding:16px;flex-wrap:wrap}.readout strong{font-size:42px}.readout .caption,.readout p{display:none}.sound{margin:0}.grid{gap:7px}.num{font-size:19px}.toolbar{align-items:flex-start;flex-direction:column}.page-head{gap:20px}.tabs button{padding:12px 17px}}@media(max-width:600px){header{height:78px;padding:0 22px}.header-note{display:none}main{padding:30px 20px 40px;min-height:calc(100vh - 155px)}h1{font-size:29px}.home-intro p{font-size:14px}.topic-card{grid-template-columns:1fr}.number-art{min-height:210px}.number-art .big{font-size:82px}.number-art .word{bottom:23px}.topic-content{padding:26px}.topic-content h2{margin-top:13px}.primary{width:100%}.page-head{display:block}.page-head h1{font-size:29px}.tabs{margin-top:22px}.tabs button{flex:1}.workspace{padding:17px;border-radius:15px}.grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}.num{font-size:22px}.listen-layout{display:flex;flex-direction:column-reverse;gap:20px}.readout{gap:13px;position:sticky;top:8px;z-index:1;box-shadow:0 4px 10px #30245408}.readout .spell{font-size:20px}.readout strong{font-size:34px}.sound{width:38px;height:38px}.quiz-layout{grid-template-columns:1fr;gap:25px}.challenge{min-height:185px}.challenge strong{font-size:80px}.quiz-bottom{gap:15px}.quiz-bottom .primary{width:auto}.range button{padding:7px 10px}footer{margin:0 20px;padding:20px 0;flex-direction:column;gap:6px}.back{margin-bottom:20px}}
[hidden]{display:none!important}.page-head{flex-wrap:wrap}.tabs{flex-wrap:wrap}.hear-play{border:0;border-radius:50%;background:var(--purple);color:white;font-size:50px;width:110px;height:110px;margin:20px;cursor:pointer}.application-nav{display:flex;gap:10px;margin-bottom:26px;flex-wrap:wrap}.chosen{background:#eee8ff;border-color:#b5a4e7}.produce-image{background:#f6f4fa;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;gap:14px}.produce-image img{max-width:100%;width:auto;height:260px;object-fit:contain}.produce-image span{font-size:15px;color:#736785}.answer-label{display:block;margin:20px 0 10px;font-weight:700}.rule-examples{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.rule-examples div{background:#f3effd;border-radius:14px;padding:22px;display:flex;flex-direction:column;gap:10px}.rule-examples strong{color:var(--purple);font-size:32px}.rule-examples span{font-size:16px}.rule-examples small{font-size:14px;color:#7c718f}.uno-practice{padding:35px 0 10px}.uno-options{display:flex;gap:12px;margin-top:25px}.uno-options button{min-width:90px;font-size:20px}.skills{flex-wrap:wrap}@media(max-width:600px){.tabs{display:grid;grid-template-columns:1fr 1fr}.tabs button{padding:12px}.rule-examples{grid-template-columns:1fr}.rule-examples div{padding:17px}.produce-image img{height:230px}.uno-options button{min-width:0;flex:1}.uno-practice h2{font-size:23px}}