:root{--navy:#092e58;--blue:#067bc0;--orange:#f58324;--cream:#f8f9fc;--muted:#6f8093;--line:#e5ebf0;--teal:#0c887b;--shadow:0 8px 32px #16365e08;--radius:23px;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--navy);background:var(--cream);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.5;cursor:wait}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid 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input{flex:1;min-width:80px}.footer-note{text-align:center;color:#94a3b3;font-size:10px;margin-top:35px}.subtle-link{font-size:11px;color:var(--blue);text-decoration:none;font-weight:700}.completed-message{font-size:12px;color:var(--teal);padding:10px 0}.mobile-nav{display:none}@media(min-width:1500px){.hero{min-height:300px}.hero h2{font-size:43px}.hero .art{width:290px;height:385px;bottom:-56px}.hero-copy{max-width:60%}}@media(max-width:1150px){.shell{grid-template-columns:195px 1fr}.sidebar{padding:23px 13px}.content{padding:25px}.topbar{padding:0 25px}.dashboard-grid{grid-template-columns:1fr}.right-col{grid-template-columns:repeat(3,1fr)}.right-col .card{padding:17px}.progress-orbit{width:110px;height:110px}.badge-grid{gap:3px}.badge-medal{width:40px;height:40px}.hero .art{width:270px;height:357px}.login-scene{padding:35px}.login-main{padding:30px}.session-layout{grid-template-columns:180px 1fr}}@media(max-width:800px){.login-page{padding:0;grid-template-columns:1fr;gap:0}.login-scene{min-height:300px;border-radius:0;padding:25px}.login-copy{margin-top:25px;max-width:66%}.login-copy h1{font-size:35px}.login-copy p{display:none}.login-scene .art{width:190px;right:10px;bottom:-28px}.login-scene .season-badge{display:none}.login-scene .logo{width:65px;height:57px}.login-main{padding:35px 25px}.login-main h2{font-size:30px}.shell{display:block}.sidebar{display:none}.topbar{height:73px;padding:0 20px}.breadcrumbs{display:none}.mobile-brand{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:800}.mobile-brand .logo{width:49px;height:47px}.content{padding:25px 18px 90px}.profile small{display:none}.page-heading{align-items:flex-start}.page-heading h1{font-size:27px}.page-heading .date-chip{display:none}.hero{padding:25px;min-height:270px}.hero-copy{max-width:60%}.hero h2{font-size:31px}.hero .art{width:215px;height:285px;right:-30px;bottom:-27px}.hero p{max-width:190px}.right-col{grid-template-columns:1fr 1fr}.right-col .tip-card{grid-column:1/-1}.lesson-grid{gap:12px}.lesson-body{padding:16px}.section-head{flex-wrap:wrap}.session-layout{grid-template-columns:1fr}.step-list{grid-template-columns:repeat(4,1fr);gap:6px}.step{padding:10px;justify-content:center}.step strong,.step small{display:none}.exercise-card{padding:22px}.word-layout{grid-template-columns:1fr}.word-list{grid-template-columns:repeat(4,1fr);gap:5px}.word-target{font-size:10px;padding:9px;text-align:center}.word-help{grid-column:1/-1}.letter{font-size:15px}.exercise-footer{flex-wrap:wrap}.stats-grid{grid-template-columns:repeat(2,1fr)}.teacher-welcome{flex-wrap:wrap;padding:22px}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;height:66px;align-items:center;justify-content:space-around;background:white;border-top:1px solid var(--line);z-index:20;padding-bottom:env(safe-area-inset-bottom)}.mobile-nav button{display:grid;justify-items:center;gap:5px;font-size:9px;color:var(--muted);padding:5px 15px}.mobile-nav button.active{color:var(--blue)}.result-row{align-items:flex-start;flex-wrap:wrap}.match-row{grid-template-columns:1fr 18px 1fr;gap:5px}.match-word,.match-row select{font-size:12px;padding:14px 10px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}.btn:hover,.lesson-card:hover{transform:none}}
.word-grid.ten{grid-template-columns:repeat(10,minmax(0,1fr))}.section-head+.result-list{margin-top:18px}.modal .row.wrap{margin-top:24px}.card+.section-head{margin-top:24px}.teacher-feedback p{white-space:pre-wrap}.word-layout .letter{min-width:0}.word-list .pill{align-self:start;justify-content:center}.exercise-card .save-state{max-width:190px}.modal form .btn{width:100%}.login-note>.icon{width:15px;height:15px;vertical-align:middle;margin-right:5px}
@media(min-width:801px){.login-scene{min-height:760px}.login-scene .art{width:280px;right:0;bottom:-12px}.login-copy p{max-width:220px}.login-copy h1{font-size:clamp(40px,4.2vw,58px)}}@media(max-width:800px){.login-copy{max-width:62%}.login-copy h1{font-size:30px}.login-scene .art{width:140px;bottom:-12px}}
@media(max-width:480px){.topbar .pill,.topbar .avatar{display:none}.profile{max-width:110px}.profile strong{font-size:11px}.topbar{gap:8px}.hero .art{width:145px;height:192px;right:0;bottom:0}.hero-copy{max-width:65%}.hero p{max-width:165px}.hero .btn{padding:12px 14px;font-size:11px}.lesson-cover .art{width:120px;height:159px;top:-10px}.lesson-cover{height:135px}.hero{min-height:295px}#toast{bottom:84px}}
.progress-orbit{border:0}.progress-orbit:before{display:none}.orbit-ring{position:absolute;inset:0;width:100%;height:100%}.progress-orbit strong,.progress-orbit small{position:relative}

/* English narration — explicit replay, persistent mute and visible instructions. */
.voice-controls{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.voice-guide{margin:22px 0;padding:18px 20px;background:#eef8fb;border:1px solid #cce9ed;border-radius:18px}
.voice-guide strong{color:#0c5261;font-size:15px}
.voice-guide p{font-size:15px;line-height:1.65;margin:12px 0;color:#24465f}
.voice-guide small{color:#506a7e;display:block;min-height:18px}
.voice-controls button[aria-pressed="false"]{background:#f2f4f7;color:#536275}
@media(max-width:700px){.topbar .voice-controls{max-width:154px}.voice-controls .btn{font-size:11px;padding:7px}.voice-guide{padding:14px}.voice-guide .row{gap:7px}.voice-guide p{font-size:14px}}

/* The narrator is outside #app so answer updates cannot restart her animation. */
.voice-presenter[hidden]{display:none}
.voice-presenter{position:fixed;bottom:22px;right:28px;z-index:35;display:flex;align-items:flex-end;gap:10px;width:min(710px,calc(100vw - 40px));pointer-events:none}
.teacher-cutout{width:150px;height:210px;position:relative;flex:none;filter:drop-shadow(0 7px 8px #092e5820)}
.teacher-cutout img,.teacher-mouth{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.mouth-shape{opacity:0;transform-origin:0 0}
.narration-bubble{pointer-events:auto;flex:1;min-width:0;background:#fff;border:2px solid #f5a23a;border-radius:23px 23px 23px 5px;padding:18px 22px;box-shadow:0 12px 45px #092e5826;margin-bottom:8px}
.narration-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:9px}
.narration-heading span{font-size:10px;letter-spacing:.12em;font-weight:850;color:#067bc0;display:flex;align-items:center;gap:7px}
.narration-heading i{display:block;width:7px;height:7px;border-radius:50%;background:#f58324}
.narration-stop{font-size:11px;white-space:nowrap;padding:5px 7px;border-radius:6px;color:#536275;background:#f3f6fa}
.narration-text{font-size:16px;font-weight:550;line-height:1.6;max-height:160px;overflow:auto;color:#092e58}
body.narration-active{padding-bottom:240px}
@media(max-width:800px){.voice-presenter{bottom:76px;right:10px;width:calc(100vw - 20px);gap:0}.teacher-cutout{width:86px;height:120px}.narration-bubble{padding:13px 14px;border-radius:18px 18px 18px 3px}.narration-text{font-size:13px;max-height:145px}.narration-heading{flex-wrap:wrap;gap:3px}.narration-heading span{font-size:8px}.narration-stop{font-size:10px}.narration-active .content{padding-bottom:240px}}
.teacher-animation{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.teacher-cutout [hidden]{display:none}
@media(min-width:481px) and (max-width:800px){.teacher-cutout{width:120px;height:168px}.narration-text{font-size:14px}}
.teacher-video-source{position:absolute;inset:0;width:100%;height:100%;opacity:.001;pointer-events:none;object-fit:contain}

/* Small, finite entrances: answer changes do not replay the page transition. */
@keyframes abc-enter{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.page-enter .page-heading,.page-enter .login-main,.page-enter .login-scene,.page-enter .hero,.page-enter .lesson-card,.page-enter .right-col>.card,.page-enter .exercise-card,.page-enter .result-hero{animation:abc-enter .45s ease-out both}
.page-enter .lesson-card:nth-child(2),.page-enter .right-col>.card:nth-child(2){animation-delay:.09s}
.page-enter .right-col>.card:nth-child(3){animation-delay:.16s}
.mission-clock{display:flex;justify-content:space-between;align-items:center;gap:15px;background:#fff6e8;border:1px solid #ffd69e;border-radius:17px;padding:15px 20px;margin:0 0 18px}
.mission-clock strong,.mission-clock small{display:block}.mission-clock strong{font-size:20px;margin:6px 0;font-variant-numeric:tabular-nums}.mission-clock small{font-size:12px;line-height:1.5;color:#5f6777}
@keyframes abc-confetti{0%{opacity:0;transform:translateY(-18px) rotate(-10deg)}25%{opacity:1}100%{opacity:0;transform:translateY(150px) rotate(15deg)}}
.mission-celebrating .result-hero{position:relative;overflow:hidden}
.mission-celebrating .result-hero:after{content:'✦  ★  ✦  ★  ✦  ★  ✦';position:absolute;top:0;left:0;width:100%;font-size:30px;letter-spacing:12px;color:#ffad18;pointer-events:none;animation:abc-confetti 2.5s ease-out 1}
.page-wrap,.main-col,.exercise-card,.content,.lesson-card{min-width:0}
button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{touch-action:manipulation}
button:focus-visible,a:focus-visible{outline:3px solid #008bd2;outline-offset:3px}
.narration-stop{min-height:36px}.voice-guide .row{flex-wrap:wrap}
@supports(padding:env(safe-area-inset-bottom)){.voice-presenter{bottom:calc(22px + env(safe-area-inset-bottom))}}
@media(max-width:800px){
 input,select,textarea,.match-row select{font-size:16px!important}
 .topbar{height:auto;min-height:74px;flex-wrap:wrap;padding:10px 14px;gap:8px}.topbar>.row{flex-wrap:wrap;justify-content:flex-end;gap:8px}.topbar .voice-controls{max-width:none}.profile{display:none}
 .btn,.icon-button,.option,.mobile-nav button{min-height:44px}.mobile-nav{height:calc(66px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}
 .content{padding-bottom:calc(90px + env(safe-area-inset-bottom))}.voice-presenter{bottom:calc(76px + env(safe-area-inset-bottom))}
 .mission-clock{padding:12px;align-items:flex-start}.mission-clock strong{font-size:17px}
 .exercise-footer>.row{flex-wrap:wrap}.word-grid{width:100%;max-width:440px}.letter{aspect-ratio:1;min-height:24px}
 .match-row{grid-template-columns:minmax(0,1fr) 16px minmax(0,1.4fr)}.match-row select{min-width:0;width:100%}
 .narration-text{max-height:120px}.narration-active .content{padding-bottom:310px}
}
@media(max-width:480px){.lesson-grid,.right-col{grid-template-columns:1fr}.login-main{padding:28px 20px}.exercise-card{padding:17px}.content{padding-left:12px;padding-right:12px}.word-grid{gap:3px}.letter{font-size:13px;padding:0}.word-grid.ten .letter{font-size:12px}.word-list{grid-template-columns:repeat(2,1fr)}.narration-bubble{padding:10px}.narration-text{font-size:13px;line-height:1.5}.mobile-brand{font-size:12px}.hero-copy{max-width:70%}.mission-clock .eyebrow{font-size:9px}}
@media(prefers-reduced-motion:reduce){.page-enter *,.mission-celebrating .result-hero:after{animation:none!important}}
/* Wide video framing preserves both hands; packed alpha is decoded only while speaking. */
.teacher-cutout{width:230px;height:193px;filter:none}.teacher-cutout img,.teacher-animation{object-fit:contain}
.teacher-video-source{object-fit:fill}
@media(max-width:800px){.teacher-cutout{width:132px;height:111px}.voice-presenter{align-items:flex-end}.narration-text{max-height:150px}}
@media(max-width:380px){.teacher-cutout{width:105px;height:88px}.narration-heading span{letter-spacing:.04em}}