:root{--primary:#173F35;--background:#F7F8F3;--surface:#FFFFFF;--accent:#CFEA75;--text:#1F2926;--muted:#6F7C76;--border:#E5E9E5;--soft:#F0F4E8;--soft-green:#E8F0E5;--green-text:#436541;--soft-red:#FAEBE8;--red-text:#A45E54;--soft-amber:#F7F2E8;--amber-text:#8A744D;--faint:#97A29A;--shadow:0 3px 14px #173f3504;--overlay:#173f353d;--radius-lg:24px;--radius:19px;--duration:.18s;font-family:PingFang SC,Microsoft YaHei,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;color:var(--text);background:var(--background);font-size:16px;font-weight:400}*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;border:0;background:none;color:inherit;cursor:pointer;transition:background var(--duration),border-color var(--duration),transform var(--duration),color var(--duration)}button:disabled{cursor:default}button:active:not(:disabled){transform:scale(.98)}a{color:var(--primary)}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--green-text);outline-offset:4px}h1,h2,h3,h4,p{margin:0}h1{font-size:30px;font-weight:650;letter-spacing:-1px;line-height:1.45}h2{font-size:22px;font-weight:600;line-height:1.5;letter-spacing:-.4px}h3{font-size:16px;font-weight:600}p{line-height:1.85}svg{flex-shrink:0;stroke-width:1.7}.ipa{font-family:Segoe UI,Arial,Helvetica Neue,DejaVu Sans,sans-serif;font-weight:400}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.eyebrow{text-transform:uppercase;letter-spacing:1.7px;font-size:11px;font-weight:500;line-height:1.6;color:var(--muted);display:flex;align-items:center;gap:7px}.button{display:inline-flex;justify-content:center;align-items:center;gap:10px;padding:0 22px;min-height:50px;border-radius:13px;font-size:14px;font-weight:550;border:1px solid transparent;white-space:nowrap}.button-primary{background:var(--primary);color:var(--surface)}.button-primary:hover{background:var(--green-text)}.button-secondary{background:var(--soft);color:var(--primary);border-color:var(--border)}.button-secondary:hover{background:var(--soft-green)}.button-accent{background:var(--accent);color:var(--primary)}.button-ghost{color:var(--muted)}.button-ghost:hover{background:var(--soft)}.button:disabled{opacity:.42}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow)}.icon-button{width:46px;min-width:46px;height:46px;display:grid;place-items:center;border:1px solid var(--border);border-radius:14px;background:var(--surface);color:var(--muted)}.icon-button:hover{color:var(--primary);background:var(--soft)}.status-dot{width:6px;height:6px;background:var(--primary);border-radius:50%;display:inline-block;flex-shrink:0}.tag{background:var(--soft);border-radius:7px;color:var(--green-text);padding:5px 10px;font-size:12px}.notice{border:1px solid var(--border);background:var(--soft-amber);color:var(--amber-text);padding:12px 16px;border-radius:12px;font-size:13px;line-height:1.7;margin-bottom:20px}.good{color:var(--green-text)}.bad{color:var(--red-text)}.quiet-label{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:12px}.back-link{min-height:44px;display:flex;align-items:center;gap:7px;font-size:13px;color:var(--muted);margin-bottom:15px}.footnote{font-size:11px;color:var(--muted);line-height:1.85;margin-top:22px}.progress-ring{width:129px;height:129px;display:grid;place-items:center;position:relative}.progress-ring svg{width:100%;height:100%;transform:rotate(-90deg);position:absolute;top:0;right:0;bottom:0;left:0;fill:none;stroke-width:5;stroke-linecap:round}.ring-track{stroke:var(--border)}.ring-value{stroke:var(--primary);transition:stroke-dasharray var(--duration)}.progress-ring>strong{font-family:system-ui,sans-serif;font-weight:500;font-size:33px;color:var(--primary);letter-spacing:-1px}.progress-ring small{font-size:14px;margin-left:2px;color:var(--muted)}.progress-track{height:6px;border-radius:10px;background:var(--border);overflow:hidden}.progress-track>div{height:100%;background:var(--primary);border-radius:10px;transition:width var(--duration)}.is-playing svg{animation:breathe .9s ease-in-out infinite alternate}@keyframes breathe{0%{opacity:.6}to{opacity:1}}@keyframes sheet-in{0%{transform:translateY(18px);opacity:.75}to{transform:translateY(0);opacity:1}}@keyframes answer-in{0%{transform:scale(.985)}to{transform:scale(1)}}.app-shell{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:216px;padding:35px 22px 28px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;z-index:10}.brand-home{padding:0;text-align:left}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap}.brand strong{display:block;font-family:system-ui,-apple-system,Segoe UI,sans-serif;font-size:20px;font-weight:650;letter-spacing:-.85px}.brand small{display:block;color:var(--muted);font-size:11px;margin-top:5px}.brand-mark{width:33px;height:35px;display:flex;justify-content:center;align-items:center;background:var(--primary);color:var(--surface);font-family:Arial,sans-serif;font-size:23px;letter-spacing:-2px;font-weight:600;border-radius:10px;position:relative;padding-right:2px}.brand-mark>span{color:var(--accent);transform:translateY(-4px)}.brand-mark>i{width:8px;height:2px;background:var(--accent);position:absolute;right:7px;bottom:6px}.sidebar-caption{color:var(--faint);font-size:11px;letter-spacing:1px;padding-left:3px;margin:15px 0 43px}.sidebar nav{display:grid;gap:7px}.sidebar nav button{display:flex;align-items:center;gap:13px;min-height:49px;padding:0 16px;color:var(--muted);font-size:14px;text-align:left;border-radius:12px}.sidebar nav button:hover{background:var(--background)}.sidebar nav button.active{background:var(--soft);color:var(--primary);font-weight:600}.sidebar nav button.active i{background:var(--primary);width:5px;height:5px;border-radius:50%;margin-left:auto}.sidebar-bottom{margin-top:auto;padding:55px 10px 0;color:var(--muted)}.sidebar-bottom>svg{color:var(--green-text);margin-bottom:15px}.sidebar-bottom p{font-size:12px;line-height:2}.sidebar-bottom button{display:flex;align-items:center;gap:30px;min-height:48px;font-size:12px;color:var(--primary);margin-top:9px}.sidebar-bottom small{font-size:8px;letter-spacing:1.3px;display:block;color:var(--faint);margin-top:27px}.app-main{margin-left:216px}.topbar{padding:0 40px}.topbar-inner{max-width:1180px;margin:auto;display:flex;justify-content:space-between;align-items:center;height:91px;border-bottom:1px solid var(--border)}.topbar .brand{display:none}.topbar-brand p{font-size:12px;color:var(--muted);letter-spacing:1px}.header-actions{display:flex;gap:12px;align-items:center}.accent-toggle{display:flex;gap:3px;padding:4px;border:1px solid var(--border);background:var(--surface);border-radius:12px;height:42px;align-items:center;font-size:11px;font-weight:600;color:var(--faint)}.accent-toggle span{display:grid;place-items:center;border-radius:8px;width:32px;height:32px}.accent-toggle span.active{background:var(--soft);color:var(--primary)}.header-actions .icon-button{border:0;background:none;width:38px;min-width:38px}.workspace{padding:32px 40px 22px;max-width:1260px;margin:0 auto}.section-title{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:25px}.section-title .eyebrow{margin-bottom:9px}.section-title p{font-size:13px;color:var(--muted);margin-top:8px}.section-title>span{font-size:12px;color:var(--muted)}.page-footer{display:flex;align-items:center;gap:8px;padding:28px 2px 5px;margin-top:32px;border-top:1px solid var(--border);color:var(--faint);font-size:11px}.footer-brand{margin-left:auto;font-family:system-ui,sans-serif;letter-spacing:-.3px}.bottom-nav{display:none}.main-content{min-width:0}.workspace>.learning-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:28px}.learning-layout .section-title .quiet-label{display:none}.detail-column{position:sticky;top:22px;align-self:start;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.detail-note{font-size:11px;color:var(--muted);text-align:center;padding:20px;background:var(--background);border-top:1px solid var(--border)}.sheet{border:0;padding:0;background:transparent;width:100%;max-width:none;max-height:90dvh;position:fixed;inset:auto 0 0;margin:0;border-radius:28px 28px 0 0;color:var(--text);overflow:visible}.sheet::backdrop{background:var(--overlay);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.sheet-surface{border-radius:28px 28px 0 0;background:var(--surface);height:100%;max-height:90dvh;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 -8px 36px var(--overlay)}.sheet-header{position:relative;display:flex;justify-content:space-between;align-items:center;padding:22px 22px 9px;flex-shrink:0;border-bottom:1px solid var(--border)}.sheet-header>span:not(.sheet-handle){font-size:13px;color:var(--muted)}.sheet-handle{position:absolute;width:35px;height:4px;border-radius:4px;background:var(--border);top:9px;left:calc(50% - 17px)}.sheet-header .icon-button{border:0;background:var(--background);width:40px;min-width:40px;height:40px}.sheet-content{overflow-y:auto;overscroll-behavior:contain;padding-bottom:calc(20px + env(safe-area-inset-bottom));min-height:0}.sheet-content>.notice{margin:18px 22px 0}.sheet[open] .sheet-surface{animation:sheet-in var(--duration) ease-out}.today-card{display:flex;min-height:298px;padding:33px 38px;background:var(--surface);position:relative;overflow:hidden;justify-content:space-between;border-radius:var(--radius-lg)}.today-copy{z-index:1}.today-card .eyebrow{font-size:10px;color:var(--green-text)}.greeting{font-size:13px;color:var(--muted);margin-top:17px}.today-card h2{font-size:30px;letter-spacing:-1px;margin:5px 0}.today-lesson-name{font-size:13px;color:var(--muted)}.today-phonemes{display:flex;gap:19px;color:var(--primary);font-size:27px;margin:18px 0 17px}.lesson-meta{display:flex;align-items:center;gap:13px;color:var(--muted);font-size:12px}.lesson-meta span{display:flex;align-items:center;gap:6px}.lesson-meta i{width:3px;height:3px;border-radius:50%;background:var(--faint)}.today-card .button{margin-top:23px;min-width:167px;justify-content:space-between}.today-progress{display:flex;align-items:center;justify-content:center;flex-direction:column;width:37%;position:relative;background:var(--background);border-radius:100px 100px 24px 24px;padding:20px 24px;margin:0 12px;max-width:265px}.today-progress:before{content:"";width:84%;height:90%;position:absolute;left:8%;top:5%;border:1px solid var(--border);border-radius:100px 100px 23px 23px;pointer-events:none}.today-progress>strong{font-size:13px;font-weight:500;margin-top:15px;z-index:1}.today-progress>p{font-size:11px;color:var(--muted);margin-top:5px;z-index:1}.today-progress>span{display:flex;align-items:center;gap:4px;font-size:10px;color:var(--green-text);margin-top:13px;z-index:1}.home-stats{display:grid;grid-template-columns:1fr 1.3fr 1fr;gap:16px;margin:18px 0 38px}.home-stats .card{padding:22px 24px;border-radius:var(--radius)}.stat-label{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12px}.stat-label svg{color:var(--green-text)}.stat-value{display:flex;align-items:baseline;gap:8px;margin-top:13px}.stat-value>strong{font-family:system-ui,sans-serif;font-size:29px;font-weight:550;line-height:1;letter-spacing:-1px}.stat-value>span{color:var(--muted);font-size:11px}.streak-card p{color:var(--faint);font-size:10px;margin-top:12px}.weekly-top{display:flex;justify-content:space-between;gap:10px;align-items:center}.weekly-top>span:last-child{font-size:11px;color:var(--muted)}.week-days{display:flex;justify-content:space-between;margin-top:14px;gap:6px}.week-days>div{display:flex;flex-direction:column;gap:9px;align-items:center;flex:1}.week-days>div>span{font-size:10px;color:var(--muted)}.week-days i{width:25px;height:25px;border-radius:50%;display:grid;place-items:center;background:var(--background);font-style:normal}.week-days i>span{width:3px;height:3px;background:var(--border);border-radius:50%}.week-days .today i{border:1px solid var(--primary)}.week-days .done i{background:var(--accent);color:var(--primary)}.overall-card .progress-track{margin-top:18px}.module-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.module-card{min-width:0;text-align:left;padding:24px 22px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);display:flex;flex-direction:column;position:relative}.module-card.available{border-color:var(--primary);background:var(--soft)}.module-card.available:hover{transform:translateY(-2px);background:var(--soft-green)}.module-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.module-icon{color:var(--muted);width:37px;height:37px;display:grid;place-items:center;border:1px solid var(--border);border-radius:11px;background:var(--background)}.available .module-icon{color:var(--primary);background:var(--accent);border-color:var(--accent)}.module-number{font-family:system-ui,sans-serif;font-size:12px;color:var(--faint)}.module-card h3{font-size:16px;font-weight:550}.module-card p{font-size:11px;color:var(--muted);margin:9px 0 20px;line-height:1.8;max-width:165px}.module-status{display:flex;align-items:center;gap:6px;font-size:10px;color:var(--faint);margin-top:auto}.available .module-status{color:var(--primary)}.module-status>svg:last-child:not(:first-child){margin-left:auto}.practice-links{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:28px}.practice-links>button{padding:20px;display:flex;align-items:center;gap:15px;border-radius:var(--radius);border:1px solid var(--border);text-align:left}.practice-icon{width:42px;height:42px;background:var(--surface);border:1px solid var(--border);border-radius:12px;display:grid;place-items:center;color:var(--green-text)}.practice-links strong{display:block;font-size:13px;font-weight:500}.practice-links small{display:block;font-size:11px;color:var(--muted);margin-top:5px}.practice-links>button>svg{margin-left:auto;color:var(--muted)}.filters{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:28px;padding-bottom:18px;border-bottom:1px solid var(--border)}.filters button{min-height:43px;padding:0 13px;border-radius:11px;font-size:12px;color:var(--muted)}.filters button.chosen{background:var(--primary);color:var(--surface)}.filters button:not(.chosen):hover{background:var(--soft)}.category{margin-bottom:30px}.category-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:15px}.category-heading h2{font-size:16px;display:flex;align-items:center;gap:10px}.category-heading h2>span{font-family:system-ui,sans-serif;color:var(--faint);font-size:11px;font-weight:400}.category-heading p{color:var(--faint);font-size:11px}.phoneme-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.phoneme{min-height:123px;padding:18px 17px 13px;display:flex;flex-direction:column;align-items:center;justify-content:space-between;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text)}.phoneme>.ipa{font-size:34px;line-height:1.5}.phoneme-bottom{display:flex;align-items:center;justify-content:space-between;width:100%;gap:6px;margin-top:7px;color:var(--muted)}.phoneme-bottom small{font-family:system-ui,sans-serif;font-size:11px}.phoneme-bottom svg{color:var(--faint)}.phoneme:hover{border-color:var(--faint)}.phoneme.selected{border-color:var(--primary);background:var(--soft);transform:scale(1.018);color:var(--primary)}.phoneme.selected .phoneme-bottom svg{color:var(--primary)}.detail{padding:22px}.detail-top{display:flex;justify-content:space-between;align-items:center;gap:8px}.detail-top .eyebrow{font-size:10px;letter-spacing:.4px}.favorite-button{display:flex;align-items:center;gap:5px;min-height:44px;color:var(--muted);font-size:11px;padding:0 3px}.favorite-button.saved{color:var(--green-text)}.detail-sound{display:flex;align-items:center;flex-direction:column;gap:6px;margin:12px 0 21px}.detail-sound>.ipa{font-size:76px;color:var(--primary);line-height:1.2}.detail>.audio-button{width:100%;font-size:13px;min-height:48px}.audio-button.icon-only{padding:0;width:46px;min-width:46px;min-height:46px;border-radius:50%;color:var(--green-text)}.audio-button.is-playing{background:var(--soft-green);color:var(--primary)}.detail-instructions{display:grid;gap:12px;margin-top:24px}.detail-instructions section{padding:14px;border-radius:13px}.instruction{border:1px solid var(--border)}.tip{background:var(--soft)}.mistake{background:var(--soft-amber)}.detail h3{font-size:12px;display:flex;align-items:center;gap:7px;font-weight:550}.detail h3 svg{color:var(--muted)}.detail p{font-size:12px;line-height:1.9;color:var(--muted);margin-top:8px}.mistake h3,.mistake h3 svg{color:var(--amber-text)}.examples{margin-top:24px}.examples>h3{justify-content:space-between;margin-bottom:7px}.examples>h3>span{font-size:10px;color:var(--faint);font-weight:400}.word{display:flex;align-items:center;gap:6px;min-height:74px;border-bottom:1px solid var(--border);padding:9px 0}.word:last-child{border-bottom:0}.word>div:first-child{flex:1;min-width:0}.word strong{display:block;font-family:system-ui,sans-serif;font-size:16px;font-weight:550}.word .ipa{display:block;font-size:12px;color:var(--muted);margin-top:4px}.word>small{font-size:11px;color:var(--faint)}.word-playing{background:var(--soft)}.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px}.lesson-focus{min-width:0}.lesson-heading{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:18px}.lesson-heading h2{font-size:23px;margin-top:7px}.lesson-count{font-size:26px;font-family:system-ui,sans-serif;font-weight:500}.lesson-count>span{font-size:14px;color:var(--faint)}.lesson-step-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:22px 0}.lesson-step-tabs button{display:flex;align-items:center;justify-content:center;gap:6px;min-height:46px;border-radius:12px;border:1px solid var(--border);color:var(--muted)}.lesson-step-tabs .ipa{font-size:19px}.lesson-step-tabs button.active{background:var(--soft);color:var(--primary);border-color:var(--primary)}.lesson-content{overflow:hidden}.focused.detail{padding:25px 30px}.focused .detail-sound>.ipa{font-size:105px}.focused .detail-sound{margin:18px 0 23px}.focused>.audio-button{width:auto;display:flex;margin:0 auto;min-width:180px}.focused .detail-instructions{grid-template-columns:1fr 1fr}.focused .instruction{grid-column:1/-1}.focused h3{font-size:14px}.focused p{font-size:13px}.focused .word strong{font-size:18px}.lesson-controls{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:19px}.lesson-controls .button{padding:0 15px}.course-catalog .section-title{margin:0 0 16px}.course-catalog h2{font-size:16px}.lesson-list{display:grid;gap:9px}.lesson-list>button{display:flex;align-items:center;gap:11px;border:1px solid var(--border);background:var(--surface);padding:13px 11px;border-radius:13px;text-align:left}.lesson-list>button.current{background:var(--soft);border-color:var(--primary)}.lesson-number{width:30px;height:30px;display:grid;place-items:center;border-radius:9px;background:var(--background);color:var(--muted);font-size:11px;flex-shrink:0}.current .lesson-number{background:var(--primary);color:var(--surface)}.lesson-list strong{font-size:12px;font-weight:500;display:block}.lesson-list small{font-size:11px;color:var(--muted);display:block;margin-top:6px;white-space:nowrap}.lesson-list>button>svg{color:var(--faint);margin-left:auto}.completion{text-align:center;padding:48px 28px;margin-top:25px}.completion-icon{width:76px;height:76px;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:var(--primary);margin:0 auto 23px}.completion>.eyebrow{justify-content:center}.completion h2{font-size:30px;margin:12px 0}.completion>p{font-size:14px;color:var(--muted)}.completion-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:30px 0}.completion-stats>div{display:flex;flex-direction:column;align-items:center;gap:9px}.completion-stats svg{color:var(--green-text)}.completion-stats strong{font-size:15px;font-weight:500}.completion-stats span{color:var(--muted);font-size:10px}.pairs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.pair{padding:25px}.pair-header{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:22px}.pair-header>span:last-child{font-size:11px;color:var(--faint)}.pair-sounds{display:grid;grid-template-columns:1fr 1fr;gap:44px;position:relative}.pair-side{border:1px solid var(--border);border-radius:18px;background:var(--background);padding:15px 12px 9px;display:flex;align-items:center;flex-direction:column}.pair-side.is-playing{background:var(--soft-green);border-color:var(--green-text)}.pair-symbol{font-size:47px;color:var(--primary);min-height:65px;line-height:1.4;padding:0}.pair-side>.audio-button{height:44px;min-height:44px}.pair-word{display:flex;align-items:center;justify-content:space-between;gap:4px;width:100%;border-top:1px solid var(--border);padding-top:12px;margin-top:6px}.pair-word strong{font-family:system-ui,sans-serif;font-weight:500;font-size:19px;display:block}.pair-word span{font-size:11px;color:var(--muted);display:block;margin-top:4px}.pair-word .audio-button{min-width:44px;width:44px}.versus{position:absolute;left:50%;top:56px;transform:translate(-50%);font-size:10px;color:var(--faint);letter-spacing:1px}.pair-tip{font-size:12px;color:var(--muted);line-height:1.85;margin:18px 0;min-height:45px}.pair-challenge{border-top:1px solid var(--border);padding-top:10px;display:flex;gap:8px;align-items:center;justify-content:space-between}.pair-challenge>.button{font-size:12px;min-height:44px;padding:0 2px;gap:7px;color:var(--primary)}.pair-challenge>span{font-size:11px;color:var(--faint)}.pair-options{display:flex;gap:6px}.pair-options button{display:flex;align-items:center;gap:3px;border:1px solid var(--border);min-height:44px;min-width:52px;justify-content:center;border-radius:10px;font-size:17px}.pair-options button:disabled{color:var(--muted)}.pair-options .correct{background:var(--soft-green);border-color:var(--green-text);color:var(--green-text)}.pair-options .incorrect{background:var(--soft-red);border-color:var(--red-text);color:var(--red-text)}.pair>p[role=status]{font-size:12px;padding-top:12px}.quiz-container{max-width:720px;margin:auto}.quiz-topline{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin-bottom:13px}.quiz-topline>span:first-child{color:var(--primary);font-weight:550}.quiz{margin-top:22px;text-align:center;padding:36px 50px 29px}.quiz>.eyebrow{justify-content:center;font-size:10px}.quiz>h2{font-size:27px;margin-top:7px}.big-audio{width:96px;height:96px;display:grid;place-items:center;background:var(--primary);color:var(--accent);border-radius:50%;margin:25px auto 12px;outline:8px solid var(--soft);transition:transform var(--duration)}.big-audio:hover{transform:scale(1.025)}.big-audio.is-playing{background:var(--green-text)}.audio-caption{display:block;color:var(--muted);font-size:11px}.quiz>h3{font-size:16px;margin-top:30px;font-weight:500}.answers{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin:22px 0 15px}.answers button{position:relative;display:flex;align-items:center;justify-content:center;gap:8px;min-height:95px;border:1px solid var(--border);background:var(--background);border-radius:16px}.answers button small{font-family:system-ui,sans-serif;position:absolute;left:13px;top:12px;color:var(--faint);font-size:10px}.answers button .ipa{font-size:36px}.answers button:disabled{color:var(--muted)}.answers button:not(:disabled):hover{background:var(--soft);border-color:var(--primary)}.answers button.correct{border-color:var(--green-text);background:var(--soft-green);color:var(--green-text);animation:answer-in var(--duration) ease-out}.answers button.incorrect{border-color:var(--red-text);background:var(--soft-red);color:var(--red-text)}.quiz-feedback{min-height:40px;display:flex;justify-content:center;align-items:center}.quiz-feedback p{font-size:11px;color:var(--faint)}.answer-result{font-size:13px;display:flex;align-items:center;justify-content:center;gap:8px;min-height:42px}.next-question{min-width:170px;margin-top:13px}.quiz-total{display:flex;justify-content:space-between;gap:12px;margin-top:24px;align-items:center;padding:0 16px}.quiz-total>span{font-size:12px;color:var(--muted)}.quiz-total>div{display:flex;align-items:center;gap:7px;font-size:10px;color:var(--muted)}.quiz-total strong{font-family:system-ui,sans-serif;font-size:15px;font-weight:500;color:var(--text)}.quiz-summary{padding:20px 0 25px}.quiz-summary>.eyebrow{justify-content:center}.quiz-summary h2{margin-top:10px;font-size:28px}.quiz-score{font-family:system-ui,sans-serif;font-weight:500;font-size:64px;display:block;margin:20px 0 10px;color:var(--primary)}.quiz-score span{font-size:24px;color:var(--faint)}.quiz-summary p{font-size:13px;color:var(--muted);margin-bottom:24px}.empty{text-align:center;padding:65px 25px}.empty-icon{width:70px;height:70px;border-radius:21px;background:var(--soft);display:grid;place-items:center;margin:0 auto 22px;color:var(--green-text)}.empty h2{font-size:23px}.empty p{color:var(--muted);font-size:13px;margin:15px 0 26px}.profile-summary{display:flex;align-items:center;gap:19px;padding:30px}.profile-avatar{width:64px;height:64px;border-radius:21px;background:var(--soft);display:grid;place-items:center;color:var(--primary)}.profile-summary h2{font-size:22px}.profile-summary p{font-size:12px;color:var(--muted);margin-top:5px}.profile-numbers{margin-left:auto;display:flex;gap:37px}.profile-numbers>span{display:flex;flex-direction:column;align-items:center;gap:7px;font-size:11px;color:var(--muted)}.profile-numbers strong{font-family:system-ui,sans-serif;font-size:27px;font-weight:500;color:var(--primary)}.profile-links{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0 32px}.profile-links>button{display:flex;align-items:center;gap:17px;padding:23px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-align:left}.profile-links>button>svg:first-child{color:var(--green-text)}.profile-links strong{font-size:14px;font-weight:500;display:block}.profile-links small{font-size:11px;color:var(--muted);margin-top:6px;display:block}.profile-links>button>svg:last-child{margin-left:auto;color:var(--faint)}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}.settings-section{padding:25px}.settings-section h2{font-size:17px;display:flex;align-items:center;gap:10px;margin-bottom:20px}.settings-section h2 svg{color:var(--muted)}.settings-section p{font-size:12px;color:var(--muted);line-height:1.9;margin:12px 0}.accent-options{display:flex;gap:10px}.accent-options>button{flex:1;min-width:0;display:flex;align-items:center;justify-content:space-between;gap:5px;border:1px solid var(--border);padding:13px 15px;border-radius:13px;font-size:11px;color:var(--muted);text-align:left;min-height:62px}.accent-options>button>span>strong{font-family:system-ui,sans-serif;display:block;font-size:16px;color:var(--primary);font-weight:500;margin-bottom:4px}.accent-options>button.chosen{border-color:var(--primary);background:var(--soft);color:var(--primary)}.offline-count{display:flex;justify-content:space-between;font-size:12px;align-items:center;margin:17px 0 12px;color:var(--muted)}.offline-count>strong{font-family:system-ui,sans-serif;font-size:17px;color:var(--primary);font-weight:500}.offline-count>strong>span{font-size:12px;color:var(--faint)}.settings-section>.button{margin-top:20px;font-size:12px}.settings-section details{border-top:1px solid var(--border);margin-top:12px}.settings-section summary{list-style:none;cursor:pointer;min-height:48px;display:flex;align-items:center;justify-content:space-between;font-size:12px}.settings-section summary::-webkit-details-marker{display:none}.settings-section details[open] summary>svg{transform:rotate(180deg)}.settings-section a{font-size:12px}.install-section,.about-section{align-self:stretch}.quiz-retry-actions{display:flex;justify-content:center;gap:12px;margin-top:14px}.auto-next{font-size:12px;color:var(--muted);margin-top:12px}.quiz-advancing .answers{animation:quiz-settle .9s ease both}@keyframes quiz-settle{0%,65%{transform:translateY(0);opacity:1}to{transform:translateY(-3px);opacity:.7}}@media(prefers-reduced-motion:reduce){.quiz-advancing .answers{animation:none}}@media(min-width:1500px){.workspace>.learning-layout{grid-template-columns:minmax(0,1fr) 335px;gap:32px}.phoneme-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.phoneme{padding:18px 13px 13px}.detail{padding:26px}.detail p{font-size:13px}}@media(max-width:1150px){.sidebar{width:190px;padding:33px 17px}.brand{gap:8px}.brand strong{font-size:18px}.app-main{margin-left:190px}.workspace{padding:27px}.topbar{padding:0 27px}.home-stats{gap:12px}.home-stats .card{padding:19px 17px}.module-grid{gap:12px}.module-card{padding:20px 16px}.workspace>.learning-layout{grid-template-columns:minmax(0,1fr) 285px;gap:19px}.phoneme-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.phoneme{min-height:118px;padding:15px}.category-heading p{font-size:10px}.course-layout{grid-template-columns:minmax(0,1fr) 265px;gap:24px}.focused.detail{padding:23px}.profile-summary{flex-wrap:wrap}.profile-numbers{gap:25px}.today-progress{margin:0;max-width:225px}.today-card{padding:28px}.today-card h2{font-size:27px}}@media(max-width:900px){.sidebar{display:none}.app-main{margin-left:0}.workspace{padding:25px 28px 98px;max-width:760px}.topbar{padding:16px 28px 0}.topbar-inner{height:auto;min-height:75px;align-items:flex-start;padding-bottom:19px;max-width:704px;gap:10px}.topbar .brand{display:flex}.topbar-brand p{font-size:11px;margin-top:10px;letter-spacing:.2px}.brand strong{font-size:22px}.brand-mark{width:34px;height:35px}.header-actions{gap:4px;margin-top:0}.accent-toggle{height:44px;font-size:10px}.accent-toggle span{width:27px;height:28px}.header-actions .icon-button{height:44px;width:44px;min-width:44px}.bottom-nav{display:flex;justify-content:space-around;position:fixed;inset:auto 0 0;background:var(--surface);border-top:1px solid var(--border);padding:8px 10px calc(9px + env(safe-area-inset-bottom));z-index:20;box-shadow:var(--shadow)}.bottom-nav button{flex:1;display:flex;align-items:center;flex-direction:column;gap:3px;font-size:10px;color:var(--faint);min-height:48px}.bottom-nav button>span{display:grid;place-items:center;width:49px;height:30px;border-radius:10px}.bottom-nav button.active{color:var(--primary);font-weight:600}.bottom-nav button.active>span{background:var(--soft)}.phoneme-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.course-layout{grid-template-columns:1fr;gap:34px}.lesson-focus,.course-catalog{max-width:600px;width:100%;margin:auto}.lesson-list{grid-template-columns:1fr 1fr}.course-catalog .section-title{margin-bottom:20px}.lesson-list small{white-space:normal}.focused.detail{padding:27px}.focused .detail-sound>.ipa{font-size:102px}.profile-summary{flex-wrap:nowrap}.profile-numbers{gap:24px}.profile-summary h2{font-size:19px}.pairs{gap:17px}.pair{padding:22px}.pair-sounds{gap:28px}.pair-side{padding:12px 9px 9px}.pair-symbol{font-size:42px}.pair-word strong{font-size:16px}.pair-challenge{flex-wrap:wrap}.detail{padding:20px 24px}.detail-top .eyebrow{font-size:12px}.detail h3,.detail p{font-size:14px}.detail-sound>.ipa{font-size:86px}.detail .word strong{font-size:19px}.detail .word .ipa{font-size:14px}.detail .word>small{font-size:12px}.detail>.audio-button{min-height:50px;font-size:14px}.detail .word{min-height:77px}.favorite-button{font-size:13px}.examples>h3>span{font-size:11px}}@media(max-width:600px){h1{font-size:26px;letter-spacing:-.8px}h2{font-size:21px}.topbar{padding:19px 20px 0;padding-top:calc(19px + env(safe-area-inset-top))}.topbar-inner{padding-bottom:19px;min-height:75px;border-bottom:0}.topbar-brand p{font-size:10px;margin-top:9px;letter-spacing:0}.brand strong{font-size:21px}.brand{gap:9px}.brand-mark{width:31px;height:33px;font-size:22px;border-radius:9px}.header-actions{gap:1px}.accent-toggle{padding:3px}.accent-toggle span{width:25px;height:27px}.workspace{padding:9px 20px 104px}.section-title{margin-bottom:22px;gap:12px}.section-title .eyebrow{font-size:10px;letter-spacing:1px;margin-bottom:7px}.section-title p{font-size:12px;margin-top:7px}.section-title>.quiet-label{display:none}.home-heading{margin-bottom:18px}.home-heading h1{font-size:27px}.today-card{padding:24px 22px;min-height:0;border-radius:24px;display:block}.today-card .eyebrow{font-size:10px;letter-spacing:1px}.greeting{font-size:11px;margin-top:15px}.today-card h2{font-size:25px;letter-spacing:-.7px;margin-top:5px}.today-lesson-name{font-size:12px;margin-top:2px}.today-phonemes{font-size:28px;justify-content:space-between;gap:8px;margin:23px 0 18px;max-width:290px}.lesson-meta{font-size:11px;gap:12px}.today-card .button{width:100%;min-height:50px;justify-content:center;margin-top:22px;font-size:14px;gap:14px}.today-progress{display:none}.home-stats{grid-template-columns:1fr 1.55fr;gap:11px;margin:14px 0 31px}.home-stats .card{padding:17px 15px;border-radius:18px}.stat-label{font-size:10px;gap:5px}.stat-label svg{width:14px;height:14px}.stat-value{gap:6px;margin-top:13px}.stat-value>strong{font-size:29px}.stat-value>span{font-size:10px}.streak-card p{display:none}.weekly-top{gap:4px}.weekly-top>span:last-child{font-size:9px;white-space:nowrap}.week-days{gap:3px;margin-top:15px}.week-days>div{gap:10px}.week-days>div>span{font-size:9px}.week-days i{width:18px;height:18px}.week-days i svg{width:11px;height:11px}.overall-card{grid-column:1/-1;display:grid;grid-template-columns:1fr auto;gap:11px 10px;align-items:center;padding:15px!important}.overall-card .stat-value{margin:0}.overall-card .stat-value>strong{font-size:16px;letter-spacing:0}.overall-card .stat-value>span{font-size:10px}.overall-card .progress-track{grid-column:1/-1;margin:0;height:4px}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.module-card{padding:19px 17px 17px;border-radius:19px}.module-card-top{margin-bottom:16px}.module-icon{width:35px;height:35px;border-radius:10px}.module-icon svg{width:21px;height:21px}.module-number{font-size:10px}.module-card h3{font-size:15px}.module-card p{font-size:11px;line-height:1.8;margin:7px 0 17px}.module-status{font-size:10px}.practice-links{grid-template-columns:1fr;gap:11px;margin-top:22px}.practice-links>button{padding:16px;gap:13px}.practice-links strong{font-size:13px}.practice-links small{font-size:11px}.page-footer{font-size:10px;margin-top:27px;padding-top:24px}.footer-brand{font-size:10px}.phoneme-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:11px}.phoneme{min-height:117px;padding:15px 13px 12px;border-radius:18px}.phoneme>.ipa{font-size:34px}.phoneme-bottom small{font-size:11px}.phoneme-bottom svg{width:15px;height:15px}.filters{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:25px;padding-bottom:0;border:0}.filters button{min-height:44px;font-size:12px;border:1px solid var(--border);background:var(--surface);border-radius:11px}.filters .chosen{border-color:var(--primary)}.category-heading{margin-bottom:14px}.category-heading h2{font-size:16px}.category-heading p{font-size:10px}.category{margin-bottom:28px}.footnote{font-size:11px}.detail{padding:19px 22px}.detail-top .eyebrow{font-size:11px}.detail-sound{margin:15px 0 20px}.detail-sound>.ipa{font-size:83px}.detail-instructions{gap:11px;margin-top:22px}.detail-instructions section{padding:15px}.detail h3{font-size:14px}.detail p{font-size:13px;line-height:1.9}.word>small{font-size:11px!important}.detail .word strong{font-size:18px}.detail .word .ipa{font-size:13px}.lesson-heading h2{font-size:20px}.lesson-heading .eyebrow{font-size:11px}.lesson-count{font-size:24px}.lesson-count>span{font-size:12px}.lesson-step-tabs{margin:20px 0 15px;gap:7px}.lesson-step-tabs button{min-height:44px}.lesson-step-tabs .ipa{font-size:18px}.focused.detail{padding:18px}.focused .detail-sound>.ipa{font-size:97px}.focused .detail-sound{margin:15px 0 20px}.focused .detail-top .eyebrow{font-size:10px}.focused .detail-instructions{grid-template-columns:1fr}.focused h3,.focused p{font-size:13px}.focused .examples h3>span{font-size:10px}.lesson-controls{gap:5px;margin-top:14px}.lesson-controls .button{padding:0 7px;font-size:12px;gap:5px;min-height:50px}.lesson-controls>.button-primary{padding:0 13px;flex:1}.lesson-controls .button>svg{width:16px;height:16px}.lesson-list{grid-template-columns:1fr}.lesson-list>button{padding:15px;gap:14px}.lesson-list strong{font-size:13px}.lesson-list small{font-size:12px}.lesson-number{width:34px;height:34px}.completion{padding:33px 19px}.completion-stats{gap:8px}.completion-stats strong{font-size:13px}.completion-stats span{font-size:9px}.pairs{grid-template-columns:1fr;gap:19px}.pair{padding:21px}.pair-sounds{gap:35px}.pair-symbol{font-size:47px}.pair-side{padding:14px 10px 10px}.pair-tip{font-size:12px}.pair-word strong{font-size:18px}.pair-word span{font-size:11px}.pair-challenge{gap:5px}.pair-challenge>span{font-size:10px}.pair-challenge>.button{font-size:12px}.pair-options button{min-width:46px}.pair-header>span:last-child{font-size:10px}.quiz-topline{font-size:11px;gap:10px}.quiz{padding:27px 20px 23px;margin-top:20px}.quiz>h2{font-size:27px}.big-audio{width:88px;height:88px;margin-top:25px}.quiz>h3{font-size:15px;margin-top:28px}.answers{gap:11px;margin:20px 0 12px}.answers button{min-height:89px;border-radius:15px}.answers button .ipa{font-size:33px}.answers button small{left:11px;top:10px}.quiz-feedback p{font-size:10px}.answer-result{font-size:12px;gap:5px}.quiz-total{padding:0;gap:5px;flex-wrap:wrap}.quiz-total>span{width:100%;text-align:center;margin-bottom:10px;font-size:11px}.quiz-total>div{flex:1;flex-direction:column;gap:5px;font-size:10px}.quiz-total strong{font-size:17px}.quiz-summary h2{font-size:24px}.quiz-summary p{font-size:12px}.quiz-score{font-size:57px}.empty{padding:45px 23px}.empty h2{font-size:22px}.empty p{font-size:13px}.profile-summary{padding:23px 20px;gap:14px;flex-wrap:wrap}.profile-avatar{width:50px;height:50px;border-radius:17px}.profile-summary h2{font-size:18px}.profile-summary p{font-size:10px}.profile-numbers{width:100%;margin:12px 0 0;border-top:1px solid var(--border);padding-top:19px;justify-content:space-around;gap:10px}.profile-numbers>span{font-size:10px}.profile-numbers strong{font-size:25px}.profile-links{gap:11px;margin:15px 0 28px}.profile-links>button{padding:17px 14px;gap:10px;flex-wrap:wrap;position:relative}.profile-links>button>svg:first-child{width:21px;height:21px}.profile-links>button>span{width:100%}.profile-links>button>svg:last-child{position:absolute;right:12px;top:17px;width:15px;height:15px}.profile-links strong{font-size:13px}.profile-links small{font-size:10px}.settings-grid{grid-template-columns:1fr;gap:16px}.settings-section{padding:22px}.settings-section h2{font-size:16px;margin-bottom:18px}.settings-section p{font-size:12px}.accent-options>button{min-height:70px;font-size:12px}.settings-section .button{font-size:13px}.notice{font-size:12px;margin-bottom:18px}}@media(max-width:350px){.workspace,.topbar{padding-left:16px;padding-right:16px}.brand strong{font-size:18px}.topbar-brand p{font-size:9px}.phoneme-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home-stats{gap:9px}.home-stats .card{padding:14px 11px}.today-card{padding:22px 19px}.today-phonemes{font-size:26px}.module-card{padding:17px 13px}.focused.detail{padding:15px}.detail-top .eyebrow{font-size:9px}.lesson-controls .button{font-size:11px;gap:3px}.lesson-controls .button-primary{padding:0 8px}.pair{padding:17px}.pair-sounds{gap:28px}.pair-word strong{font-size:16px}.quiz{padding:25px 16px}}.topbar-brand p,.module-card p{font-size:13px}.module-status,.stat-label{font-size:12px}.greeting{font-size:13px}.today-lesson-name{font-size:14px}.lesson-meta{font-size:12px}.section-title p,.detail p,.detail .word .ipa,.settings-section p,.pair-tip{font-size:14px}.practice-links small,.profile-links small,.sidebar-caption{font-size:12px}.sidebar-bottom p{font-size:13px}.quiz-feedback p,.category-heading p{font-size:12px}@media(max-width:600px){.topbar-brand p{font-size:11px}.module-card p{font-size:12px}.module-status,.stat-label{font-size:11px}.greeting{font-size:12px}.today-lesson-name,.section-title p{font-size:13px}.detail p,.focused p{font-size:14px}.category-heading p{font-size:11px}.settings-section p,.pair-tip{font-size:13px}.practice-links small,.profile-links small,.quiz-feedback p{font-size:11px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
