@font-face{font-family:LAndN CJK;src:url(/fonts/landn-cjk-subset.woff2) format("woff2");font-display:swap;font-style:normal;font-weight:400 900}html{background:#f8f5ee}body{margin:0;min-width:320px;min-height:100vh;font-family:Inter,Hiragino Sans GB,Noto Sans CJK SC,Noto Sans CJK TC,LAndN CJK,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased}button,a{font-family:inherit}button:focus-visible,a:focus-visible{outline:3px solid rgba(19,169,155,.45);outline-offset:2px}:root{--ink: #10233d;--muted: #62728a;--cream: #f8f5ee;--paper: #fffdf8;--navy: #081f4d;--coral: #ff705c;--coral-soft: #fff0eb;--teal: #13a99b;--teal-soft: #e6f8f5;--line: rgba(16, 35, 61, .1);color:var(--ink)}*{box-sizing:border-box}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit}button:disabled{cursor:not-allowed}.app-shell{min-height:100dvh;padding-bottom:calc(94px + env(safe-area-inset-bottom));background:radial-gradient(circle at 100% 0,rgba(19,169,155,.09),transparent 30rem),var(--cream)}.app-header{min-height:62px;display:flex;align-items:center;justify-content:space-between;padding:calc(8px + env(safe-area-inset-top)) 16px 8px;max-width:780px;margin:auto}.update-prompt{width:min(100% - 32px,680px);margin:8px auto 14px;padding:14px 16px;display:flex;gap:12px;align-items:flex-start;border:1px solid rgba(19,169,155,.2);border-radius:18px;background:var(--teal-soft);color:var(--navy)}.update-prompt>svg{flex:none;color:var(--teal);margin-top:2px}.update-prompt.is-busy{visibility:hidden;pointer-events:none}.update-copy{flex:1;min-width:0}.update-copy strong{font-size:14px}.update-copy p{font-size:12px;line-height:1.5;margin:5px 0 8px}.update-actions{display:flex;gap:6px 12px;flex-wrap:wrap}.update-actions button,.update-actions a{min-height:44px;padding:9px 12px;display:inline-flex;align-items:center;gap:5px;border:0;border-radius:12px;font-weight:750;font-size:12px;color:#fff;background:var(--navy);cursor:pointer;text-decoration:none}.update-actions .update-later{color:var(--navy);background:transparent}.brand{border:0;background:transparent;display:flex;align-items:center;gap:10px;color:var(--navy);font-weight:850;letter-spacing:-.04em;font-size:20px;cursor:pointer}.brand img{width:32px;height:32px;border-radius:9px;box-shadow:0 6px 14px #081f4d2e}.header-actions{display:flex;align-items:center;gap:7px}.ui-language-picker{height:36px;display:flex;align-items:center;gap:4px;padding:0 7px;border:1px solid var(--line);border-radius:12px;background:#ffffffb8;color:var(--teal)}.ui-language-picker select{width:94px;max-width:100%;border:0;outline:0;appearance:none;background:transparent;color:var(--navy);font-size:11px;font-weight:800;cursor:pointer}.streak{height:36px;display:flex;gap:4px;align-items:center;background:#ffffffb8;border:1px solid var(--line);padding:0 9px;border-radius:12px;font-weight:800;color:#d45642}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.practice-page,.learn-page,.progress-page,.listen-page,.listen-shell{width:min(100% - 32px,680px);margin:0 auto}.listen-shell .listen-page{width:100%}.hero-copy{padding:40px 2px 24px}.eyebrow{color:var(--teal);font-size:12px;text-transform:uppercase;letter-spacing:.14em;font-weight:850;display:flex;gap:7px;align-items:center}.hero-copy h1,.section-heading h1{font-family:ui-serif,Georgia,serif;font-size:clamp(40px,12vw,68px);line-height:.97;letter-spacing:-.055em;margin:12px 0 14px;color:var(--navy);font-weight:700}.hero-copy h1 span{color:var(--coral);font-style:italic}.hero-copy>p,.section-heading>p{color:var(--muted);margin:0;line-height:1.6}.language-switcher{direction:ltr;display:grid;grid-template-columns:repeat(3,1fr);padding:4px;background:#10233d0f;border-radius:15px;margin:3px 0 8px}.language-switcher button{padding:10px 8px;border:0;border-radius:11px;background:transparent;color:var(--muted);font-size:13px;font-weight:750;cursor:pointer}.language-switcher button.active{background:var(--paper);color:var(--navy);box-shadow:0 3px 12px #10233d14}.language-switcher button:disabled,.icon-button:disabled,.sound-toggle button:disabled,.listen-button:disabled{opacity:.56}.practice-kicker{min-height:35px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:4px 12px;padding:0 3px 7px}.practice-kicker small{min-width:0;color:var(--muted);font-size:10px;font-weight:750;letter-spacing:.04em}.drill-card,.score-card,.anatomy-card,.history-card{background:var(--paper);border:1px solid rgba(16,35,61,.08);border-radius:28px;box-shadow:0 18px 50px #192b4314}.drill-card{padding:18px;overflow:hidden}.drill-topline{display:flex;justify-content:space-between;align-items:center}.icon-button{width:42px;height:42px;display:grid;place-items:center;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:14px;cursor:pointer}.sound-toggle{background:#f1f0ec;padding:4px;border-radius:14px;display:flex;gap:3px}.sound-toggle button{width:48px;height:38px;border:0;border-radius:10px;display:grid;place-items:center;background:transparent;color:#8992a0;font-weight:900;cursor:pointer}.sound-toggle .l.active{color:#fff;background:var(--coral);box-shadow:0 5px 12px #ff705c40}.sound-toggle .n.active{color:#fff;background:var(--teal);box-shadow:0 5px 12px #13a99b40}.word-area{text-align:center;padding:30px 8px 23px}.target-label{color:var(--coral);letter-spacing:.16em;font-size:10px;font-weight:900}.word-area h2{font-family:ui-serif,Georgia,serif;font-size:clamp(54px,17vw,82px);line-height:1;color:var(--navy);margin:6px 0;letter-spacing:-.045em}.ipa{color:var(--muted);margin:0 0 10px;font-size:15px}.ipa span{opacity:.72}.drill-topline,.sound-toggle,.sound-spelling,.contrast-row{direction:ltr}.contrast-row span{unicode-bidi:plaintext}.bottom-nav button{min-width:0;padding:4px;overflow-wrap:anywhere}html[dir=rtl] .cue,html[dir=rtl] .model-toolbar{text-align:right}html[dir=rtl] .record-button.recording:before,html[dir=rtl] .record-button.recording:after{left:auto;right:6px}html[dir=rtl] .eyebrow{letter-spacing:0}.sound-spelling{width:fit-content;min-height:31px;margin:0 auto 16px;padding:4px 8px 4px 5px;display:flex;align-items:center;border-radius:10px;background:#10233d0e;color:var(--muted);font-size:13px;font-weight:750}.sound-spelling .focus{min-width:24px;height:24px;margin-right:1px;display:grid;place-items:center;border-radius:7px;color:#fff;text-transform:uppercase}.sound-spelling .focus.l{background:var(--coral)}.sound-spelling .focus.n{background:var(--teal)}.sound-spelling small{margin-left:9px;color:#8a96a6;font-size:8px;font-weight:850;letter-spacing:.07em;text-transform:uppercase}.sound-spelling.chinese>span:first-child{margin:0 8px 0 3px;color:var(--navy);font-size:16px}.listen-button{margin:auto;border:0;color:var(--teal);background:var(--teal-soft);border-radius:999px;padding:10px 15px;display:flex;gap:8px;align-items:center;font-weight:800;cursor:pointer}.listen-button[aria-busy=true]{opacity:1;cursor:wait}.contrast-row{background:#f5f3ee;border-radius:18px;padding:14px 18px;display:flex;align-items:center;justify-content:space-between}.contrast-row div{display:flex;flex-direction:column;gap:2px;min-width:88px}.contrast-row div:last-child{text-align:right}.contrast-row span{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.11em;font-weight:800}.contrast-row strong{font-size:18px;color:var(--coral)}.contrast-row .avoid strong{color:var(--teal)}.cue{display:flex;gap:12px;align-items:flex-start;padding:18px 4px 5px;color:var(--muted)}.cue svg{color:var(--coral);flex:0 0 auto;margin-top:2px}.cue p{margin:0;line-height:1.55;font-size:13px}.signal-studio{margin:13px 0 0;padding:10px;border-radius:17px;background:#071c45;color:#fff;box-shadow:inset 0 0 0 1px #ffffff14}.signal-heading{display:flex;justify-content:space-between;align-items:center;gap:8px;height:22px;padding:0 2px 8px;color:#dbe6f4;font-size:9px;font-weight:850;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap}.signal-heading>div{display:flex;align-items:center;gap:6px;min-width:0;overflow:hidden}.signal-heading>span{color:#7890ad;flex-shrink:0}.live-dot{width:7px;height:7px;border-radius:50%;background:#536b8a}.live-dot.active{background:#55e1ce;box-shadow:0 0 0 5px #55e1ce1f;animation:live-pulse 1.1s ease-in-out infinite alternate}@keyframes live-pulse{to{opacity:.55}}.signal-studio canvas{display:block;width:100%;height:105px;border-radius:12px}.signal-studio p{margin:7px 3px 1px;color:#8fa4be;font-size:9px;line-height:1.45}.record-button{position:relative;width:100%;height:78px;border:0;border-radius:20px;margin-top:14px;padding:10px 22px;background:var(--navy);color:#fff;display:grid;grid-template-columns:48px 1fr;align-items:center;gap:13px;font-weight:850;cursor:pointer;overflow:hidden;box-shadow:0 12px 25px #081f4d2e}.record-button>span:last-child{min-width:0;text-align:start;line-height:1.3;overflow-wrap:anywhere}.practice-feedback{display:flow-root;overflow-anchor:none}.practice-capture-status{min-height:22px;margin:12px 0;text-align:center;font-size:12px;color:var(--muted)}.practice-contrast{margin-top:18px}.practice-signal-note{color:var(--muted);font-size:11px;line-height:1.5;margin:8px 4px 16px}.record-button:disabled{opacity:.75;cursor:wait}.record-orbit{width:48px;height:48px;border-radius:50%;background:var(--coral);display:grid;place-items:center}.record-button.recording{background:#17335e}.record-button.recording:before,.record-button.recording:after{content:"";position:absolute;width:80px;height:80px;border:1px solid rgba(255,255,255,.22);border-radius:50%;animation:pulse 1.6s infinite;left:6px;pointer-events:none}.record-button.recording:after{animation-delay:.5s}.recording-time{position:absolute;right:15px;color:#b7fff1;font-size:10px;text-transform:uppercase;letter-spacing:.1em}@keyframes pulse{0%{transform:scale(.55);opacity:1}to{transform:scale(1.4);opacity:0}}.error-message{color:#b33c2d;background:#fff0ed;border-radius:12px;padding:10px 12px;font-size:13px}.science-note,.source-card{display:flex;gap:13px;padding:18px;margin:16px 2px;border:1px solid var(--line);border-radius:20px;background:#ffffff73}.science-note svg,.source-card svg{color:var(--teal);flex:0 0 auto}.science-note strong,.source-card strong{display:block;font-size:13px;margin-bottom:3px}.science-note p,.source-card p{color:var(--muted);font-size:12px;line-height:1.5;margin:0}.score-card{margin-top:16px;padding:20px}.score-summary{display:grid;grid-template-columns:112px 1fr;gap:17px;align-items:center}.score-ring{--score: 0deg;width:108px;height:108px;border-radius:50%;background:conic-gradient(var(--coral) var(--score),#eceae5 0);display:grid;place-items:center}.score-ring:before{content:"";width:84px;height:84px;border-radius:50%;background:var(--paper);grid-area:1/1}.score-ring div{grid-area:1/1;z-index:1;display:flex;flex-direction:column;text-align:center}.score-ring strong{font-size:32px;line-height:1;color:var(--navy)}.score-ring span{color:var(--muted);font-size:10px}.confidence{font-size:9px;text-transform:uppercase;letter-spacing:.12em;color:var(--teal);font-weight:900}.confidence.low{color:#b65f3d}.score-summary h2{font-family:ui-serif,Georgia,serif;margin:5px 0;font-size:23px;color:var(--navy)}.score-summary p{margin:0;color:var(--muted);font-size:12px}.heard-result{margin:15px 0 4px;padding:10px 12px;border-radius:12px;background:#13a99b14;color:var(--muted);font-size:13px;display:flex;align-items:baseline;justify-content:space-between;gap:12px}.heard-result strong{color:var(--navy);text-align:right;overflow-wrap:anywhere}.metrics{margin:20px 0;display:grid;gap:10px}.metrics>div{display:grid;grid-template-columns:86px 1fr 28px;gap:10px;align-items:center;font-size:11px;color:var(--muted)}.metrics i{height:6px;border-radius:999px;background:#ebe9e4;overflow:hidden}.metrics b{height:100%;display:block;border-radius:inherit;background:linear-gradient(90deg,var(--teal),#55cfb9)}.metrics strong{color:var(--navy);text-align:right}.feedback-list{border-top:1px solid var(--line);padding-top:10px}.feedback-list p{display:flex;align-items:flex-start;gap:8px;color:var(--muted);font-size:12px;line-height:1.45}.feedback-list svg{color:var(--teal);flex:0 0 auto}.evidence-panel{margin-top:14px;padding:13px;border-radius:15px;background:#10233d0b;color:var(--muted)}.evidence-panel summary{cursor:pointer;color:var(--navy);font-size:12px;font-weight:850}.evidence-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:11px}.evidence-grid div{min-width:0;padding:8px 4px;border-radius:10px;background:#ffffffbf;text-align:center}.evidence-grid span{display:block;overflow:hidden;color:var(--muted);font-size:8px;text-overflow:ellipsis;white-space:nowrap}.evidence-grid strong{display:block;margin-top:2px;color:var(--navy);font-size:15px}.evidence-panel>p{margin:10px 2px 0;font-size:9px;line-height:1.5}.score-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:16px}.score-actions button,.empty-state button{min-height:44px;border:1px solid var(--line);background:#fff;border-radius:13px;display:flex;gap:7px;align-items:center;justify-content:center;font-weight:800;color:var(--navy);cursor:pointer}.score-actions .primary{color:#fff;background:var(--navy)}.section-heading{padding:28px 2px 18px}.section-heading.compact{padding:21px 2px 7px}.section-heading.compact h1{max-width:600px;margin:8px 0 9px;font-size:clamp(30px,8vw,48px);line-height:1.04}.anatomy-card{padding:20px}.mouth-model-card{margin-top:3px;padding:15px;overflow:hidden;border:1px solid rgba(255,255,255,.1);border-radius:25px;background:radial-gradient(circle at 75% 12%,rgba(19,169,155,.23),transparent 45%),linear-gradient(145deg,#071b41,#102d4d);box-shadow:0 20px 45px #081f4d33;color:#fff}.mouth-model-card.sound-n{background:radial-gradient(circle at 74% 12%,rgba(39,216,194,.27),transparent 46%),linear-gradient(145deg,#071b41,#10344f)}.model-loading{min-height:330px;display:grid;place-items:center;border-radius:28px;background:#0a2346;color:#9fb5cd;font-size:12px}.model-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px}.model-toolbar>div:first-child{display:flex;flex-direction:column}.model-toolbar span{color:#7fd8cb;font-size:8px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}.model-toolbar strong{margin-top:3px;font-size:15px}.model-switch{display:flex;gap:3px;padding:3px;border-radius:11px;background:#ffffff17}.model-switch button{width:35px;height:30px;border:0;border-radius:8px;background:transparent;color:#91a5bd;font-weight:900;cursor:pointer}.model-switch button.active{color:#fff}.model-switch button.active.l{background:var(--coral)}.model-switch button.active.n{background:var(--teal)}.mouth-model-canvas{width:100%;height:292px;margin:-3px 0 -4px;cursor:grab}.mouth-model-canvas:active{cursor:grabbing}.mouth-model-fallback{margin:8px 0 12px;padding:14px 16px;border-radius:14px;background:var(--teal-soft);color:var(--navy);font-size:14px;line-height:1.5}.mouth-model-canvas canvas{display:block;width:100%!important;height:100%!important}.model-callouts{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;margin:0 0 10px}.model-callouts span{min-height:42px;display:flex;align-items:center;gap:6px;padding:7px;border:1px solid rgba(255,255,255,.09);border-radius:10px;background:#ffffff0e;color:#dce9f6;font-size:8px;font-weight:750;line-height:1.3}.model-callouts b{width:17px;height:17px;flex:0 0 17px;display:grid;place-items:center;border-radius:50%;background:var(--coral);color:#fff;font-size:8px}.sound-n .model-callouts b{background:var(--teal)}.model-legend{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 13px;color:#bed0e3;font-size:7px;text-transform:uppercase}.model-legend span{display:flex;align-items:center;gap:4px}.model-legend i{width:7px;height:7px;display:inline-block;border-radius:50%}.tongue-key{background:var(--coral)}.ridge-key{background:#ffd47a}.velum-key{background:#d9a7ff;box-shadow:0 0 7px #d9a7ffa6}.air-key{background:var(--coral);box-shadow:0 0 7px var(--coral)}.air-key.nasal{background:var(--teal);box-shadow:0 0 7px var(--teal)}.mouth-model-card>p{max-width:500px;margin:10px auto 0;color:#8fa6be;font-size:8px;line-height:1.45;text-align:center}.mouth-model-card>p strong{color:#bed0e3}.mouth-diagram{height:230px;position:relative;overflow:hidden;border-radius:20px;background:linear-gradient(160deg,#edf8f6,#f9e9e3)}.palate{position:absolute;width:73%;height:105px;border:18px solid var(--navy);border-left:0;border-bottom:0;border-radius:0 90px 0 0;top:52px;left:14%;transform:rotate(-7deg)}.tongue{position:absolute;width:61%;height:72px;background:var(--coral);border-radius:70% 45% 30% 20%;bottom:38px;left:15%;transform:rotate(-7deg);box-shadow:inset 0 8px #ffffff2e}.ridge-dot{position:absolute;width:23px;height:23px;background:#ffe09c;border:6px solid var(--navy);border-radius:50%;top:70px;left:25%}.air{position:absolute;width:46px;height:46px;display:grid;place-items:center;color:#fff;font-weight:900;border-radius:50%}.air-side{background:var(--coral);right:20%;bottom:25px}.air-nose{background:var(--teal);right:24%;top:23px}.diagram-legend{display:flex;justify-content:center;gap:22px;margin-top:15px;font-size:11px;font-weight:800}.diagram-legend span:before{content:"";width:9px;height:9px;display:inline-block;border-radius:50%;margin-right:6px}.l-dot:before{background:var(--coral)}.n-dot:before{background:var(--teal)}.principles{margin:20px 0}.principles article{display:grid;grid-template-columns:38px 1fr;gap:8px;padding:18px 4px;border-bottom:1px solid var(--line)}.principles article>span{color:var(--coral);font-size:11px;font-weight:900;letter-spacing:.08em}.principles h2{color:var(--navy);font-size:18px;margin:0 0 5px}.principles p{color:var(--muted);margin:0;font-size:13px;line-height:1.6}.source-links{display:flex;flex-wrap:wrap;gap:7px 14px;margin-top:7px}.source-card a{color:var(--teal);font-size:12px;font-weight:800;display:inline-block}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(74px,1fr));gap:9px}.stats-grid strong{font-variant-numeric:tabular-nums}.stats-grid article{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:16px 10px;display:flex;flex-direction:column;align-items:center;text-align:center}.stats-grid svg{color:var(--coral);width:20px}.stats-grid strong{color:var(--navy);font-size:28px;margin-top:5px}.stats-grid span{color:var(--muted);font-size:10px}.history-card{padding:20px;margin-top:14px}.history-card h2{font-size:17px;margin:0 0 10px}.history-card>article{border-top:1px solid var(--line);padding:13px 2px;display:flex;align-items:center;justify-content:space-between}.history-card article div{display:flex;flex-direction:column}.history-card article span{color:var(--muted);font-size:10px;margin-top:3px}.history-card article b{color:var(--teal);font-size:20px}.history-card .history-word{min-width:0;overflow-wrap:anywhere;flex:1}.history-word time{color:var(--muted);font-size:11px;margin-top:5px}.history-note,.history-pagination p{color:var(--muted);font-size:12px;line-height:1.5}.history-pagination{text-align:center;border-top:1px solid var(--line);padding-top:12px}.history-pagination button{min-height:44px;padding:10px 18px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--navy);font-weight:750;cursor:pointer}.history-no-audio{max-width:72px;text-align:center;margin:0 12px}.storage-warning{padding:12px 16px;border:1px solid #e6c985;border-radius:12px;background:#fff8e7;color:#6c4b14;font-size:13px;line-height:1.5}.empty-state{text-align:center;color:var(--muted);padding:28px;display:flex;flex-direction:column;align-items:center}.empty-state svg{color:var(--teal)}.empty-state p{font-size:13px}.empty-state button{padding:0 18px}.clinical-note{color:var(--muted);font-size:11px;line-height:1.6;padding:14px 5px}.legal-links{display:flex;justify-content:center;gap:20px;padding:0 0 10px}.legal-links a{color:var(--teal);font-size:11px;font-weight:800}.store-links{margin:0 0 20px;padding:16px 0;border-top:1px solid var(--line);text-align:center}.store-links p{margin:4px 0;color:var(--muted);font-size:12px;line-height:1.6}.store-links .store-links-title{color:var(--ink);font-weight:700}.store-links>div{display:flex;flex-wrap:wrap;justify-content:center;gap:0 16px}.store-links a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 4px;color:var(--navy);font-size:13px;font-weight:700;text-underline-offset:3px}.app-store-prompt{display:flex;align-items:flex-start;gap:10px;margin:10px 0;padding:12px 8px 8px 12px;border:1px solid rgba(19,169,155,.18);border-radius:18px;background:var(--teal-soft)}.app-store-prompt.is-busy{visibility:hidden;pointer-events:none}.app-store-prompt>img{flex:0 0 36px;border-radius:10px;margin-top:2px}.app-store-prompt-copy{min-width:0;flex:1}.app-store-prompt-copy strong{color:var(--navy);font-size:13px}.app-store-prompt-copy p{margin:3px 0 6px;color:#4c6268;font-size:11px;line-height:1.5}.app-store-prompt-copy a{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:8px 12px;border-radius:11px;background:var(--navy);color:#fff;font-size:12px;font-weight:750;text-decoration:none}.app-store-prompt-copy a svg{flex-shrink:0}.app-store-prompt-dismiss{display:grid;place-items:center;flex:0 0 44px;height:44px;margin-top:-6px;border:0;border-radius:12px;background:transparent;color:#4c6268;cursor:pointer}.app-store-prompt-dismiss:hover{background:#10233d0f}.app-store-prompt :focus-visible{outline:3px solid var(--teal);outline-offset:3px}.bottom-nav{position:fixed;z-index:10;bottom:max(12px,env(safe-area-inset-bottom));left:50%;transform:translate(-50%);width:min(calc(100% - 24px),440px);height:68px;display:grid;grid-template-columns:repeat(4,1fr);padding:5px;background:#081f4df0;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.12);border-radius:22px;box-shadow:0 15px 38px #081f4d47}.bottom-nav button{border:0;border-radius:17px;color:#aebbd1;background:transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:9px;font-weight:750;cursor:pointer}.bottom-nav svg{width:20px}.bottom-nav button.active{color:#fff;background:#ffffff1f}.bottom-nav button:disabled{opacity:.55}@media(min-width:760px){.drill-card{padding:26px 34px 30px}.app-header{padding-left:0;padding-right:0}.practice-page{width:min(100% - 32px,720px)}.score-card{padding:28px 32px}}@media(min-width:900px){html[data-native-platform=macos] .app-header{max-width:1000px}html[data-native-platform=macos] .practice-page{width:min(100% - 48px,1000px)}html[data-native-platform=macos] .drill-card{display:grid;grid-template-columns:1fr 1fr;gap:14px 28px;padding:24px 28px}html[data-native-platform=macos] .drill-topline{grid-column:1 / -1}html[data-native-platform=macos] .word-area{grid-column:1;grid-row:2;padding:24px 0 12px;align-self:center}html[data-native-platform=macos] .contrast-row{grid-column:2}html[data-native-platform=macos] .cue{grid-column:2;padding:0 4px}html[data-native-platform=macos] .signal-studio{grid-column:2;margin:0}html[data-native-platform=macos] .record-button{grid-column:1 / -1;min-height:64px;margin-top:0}html[data-native-platform=macos] .error-message{grid-column:1 / -1;margin:0}}@media(max-width:390px){.brand span{display:none}.ui-language-picker select{width:90px}.practice-page,.learn-page,.progress-page{width:min(100% - 22px,680px)}.mouth-model-canvas{height:270px}.model-callouts span{padding:6px 4px}}@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;scroll-behavior:auto!important}}.listen-page .section-heading h1{font-size:clamp(34px,10vw,54px)}.exam-card{background:var(--paper);border:1px solid rgba(16,35,61,.08);border-radius:28px;box-shadow:0 18px 50px #192b4314;padding:18px 16px 20px}.exam-empty{margin:0;color:var(--muted);line-height:1.6;font-size:13px}.exam-setup{display:flex;flex-direction:column;gap:12px}.exam-field{display:flex;flex-direction:column;gap:6px}.exam-field>span{color:var(--muted);font-size:10px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.chip-row{display:flex;flex-wrap:wrap;gap:6px}.chip-row button{border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:12px;padding:8px 11px;font-size:12px;font-weight:750;cursor:pointer}.chip-row button.active{background:var(--navy);border-color:var(--navy);color:#fff}.chip-row button{display:inline-flex;align-items:center;gap:4px;min-height:44px}.pair-preview-hint{color:var(--muted);font-size:12px;line-height:1.5}.chip-row button[data-testid^=exam-pair-]{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;touch-action:pan-y}.preview-transport{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;min-height:64px;margin-top:10px;padding:8px 2px}.preview-status{min-width:0;margin:0;color:var(--teal);font-size:12px;line-height:20px}.preview-status span,.preview-status strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.exam-preview-stop{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:10px 14px;border:1px solid var(--line);border-radius:14px;background:var(--teal-soft);color:var(--navy);cursor:pointer}.sound-playing:not(li),li.sound-playing .played .exam-word{animation:sound-breathe 1.8s ease-in-out infinite}.chip-row button.sound-playing{background:var(--teal-soft);color:var(--navy);border-color:var(--teal)}.result-rows li.sound-playing .played{color:#087d71}.result-rows li.sound-playing .played .exam-word{border-radius:8px;background:#13a99b0f}.result-rows li.sound-playing button{background:var(--teal-soft);color:#087d71}@keyframes sound-breathe{0%,to{box-shadow:0 0 4px 1px #13a99b14}50%{box-shadow:0 0 13px 4px #13a99b38}}@media(prefers-reduced-motion:reduce){.sound-playing:not(li),li.sound-playing .played .exam-word{animation:none;box-shadow:0 0 0 1px #13a99b66}}.chip-row button:disabled{opacity:.5;cursor:default}.exam-dots{display:flex;gap:6px;justify-content:center;margin:18px 0 14px;min-height:12px}.exam-dots i{width:11px;height:11px;border-radius:50%;background:#10233d1f;transition:transform .15s ease,background .15s ease}.exam-dots i.filled{background:var(--navy)}.exam-dots i.playing{background:var(--coral);transform:scale(1.45)}.exam-dots i.right{background:var(--teal)}.exam-dots i.wrong{background:var(--coral)}.exam-actions{display:flex;flex-wrap:wrap;gap:8px}.exam-primary{flex:1;min-height:58px;border:0;border-radius:18px;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;gap:10px;font-size:15px;font-weight:850;cursor:pointer;box-shadow:0 12px 25px #081f4d2e}.exam-prompt{display:flex;justify-content:space-between;align-items:baseline;gap:10px;color:var(--muted);font-size:12px;margin:18px 0 8px}.exam-prompt b{color:var(--navy);font-variant-numeric:tabular-nums}.answer-chips{display:flex;flex-wrap:wrap;gap:6px;min-height:38px}.answer-chips .chip{min-width:38px;height:34px;padding:0 10px;display:inline-flex;align-items:center;justify-content:center;border-radius:11px;font-size:13px;font-weight:800;background:#10233d0d;color:var(--muted)}.answer-chips .chip.l{background:var(--coral-soft);color:#c4442f}.answer-chips .chip.n{background:var(--teal-soft);color:#0b7f74}.answer-chips .chip.empty{border:1px dashed var(--line);background:transparent}.option-buttons{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.option-buttons .option{min-height:66px;border-radius:18px;border:1px solid var(--line);background:#fff;color:var(--navy);font-size:19px;font-weight:800;cursor:pointer}.option-buttons .option.l{background:var(--coral-soft);border-color:#ff705c59}.option-buttons .option.n{background:var(--teal-soft);border-color:#13a99b59}.option-buttons .option:disabled{opacity:.5;cursor:default}.exam-word{display:inline-flex;align-items:baseline;gap:2px}.exam-word-head{margin-right:4px}.exam-word .focus.l{color:var(--coral)}.exam-word .focus.n{color:var(--teal)}.hear-words{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:8px}.hear-words .hear{min-height:40px;border-radius:12px;border:1px dashed var(--line);background:#fff;color:var(--navy);font-size:13px;font-weight:750;display:inline-flex;align-items:center;justify-content:center;gap:6px;cursor:pointer}.hear-words .hear.l{color:#c8432f}.hear-words .hear.n{color:#0f8a7e}.hear-words .hear:disabled{opacity:.45;cursor:default}.exam-secondary{display:flex;gap:8px;margin-top:14px}.exam-secondary button{flex:1;min-height:44px;border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:14px;font-size:13px;font-weight:750;display:inline-flex;align-items:center;justify-content:center;gap:6px;cursor:pointer}.exam-secondary button.primary{flex:1.4;background:var(--teal);border-color:var(--teal);color:#fff;font-weight:850}.exam-secondary button:disabled{opacity:.45;cursor:default}.exam-result{background:var(--paper);border:1px solid rgba(16,35,61,.08);border-radius:28px;box-shadow:0 18px 50px #192b4314;padding:18px 16px 20px;margin-top:14px}.exam-result header h2{margin:0;font-size:17px;color:var(--navy)}.exam-result header strong{display:block;font-size:30px;color:var(--teal);margin:6px 0 2px;font-variant-numeric:tabular-nums}.exam-result header p{margin:0 0 12px;color:var(--muted);font-size:13px}.result-rows{list-style:none;margin:0 0 14px;padding:0}.result-rows li{display:grid;grid-template-columns:22px 1fr 1fr 20px 36px;align-items:center;gap:8px;border-top:1px solid var(--line);padding:10px 0}.result-rows .position{color:var(--muted);font-size:11px;font-weight:800}.result-rows small{display:block;color:var(--muted);font-size:9px;text-transform:uppercase;letter-spacing:.08em}.result-rows .played,.result-rows .chosen{font-size:15px;font-weight:750;color:var(--navy)}.result-rows li.wrong .chosen{color:#c4442f}.result-rows li.right .mark{color:var(--teal)}.result-rows li.wrong .mark{color:var(--coral)}.result-rows li>button{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line);background:#fff;color:var(--teal);border-radius:12px;cursor:pointer}@media(min-width:760px){.exam-card,.exam-result{padding:24px 28px 26px}.exam-setup{flex-direction:row;gap:24px}}.error-detail{display:block;margin-top:4px;font-size:10px;opacity:.75;word-break:break-word}.unlock-card{margin:14px 0 0;padding:14px 16px;border-radius:16px;background:linear-gradient(135deg,#10233d0f,#ff7f661a);border:1px solid var(--line)}.unlock-card.compact{padding:10px 14px}.unlock-heading{display:flex;align-items:center;gap:8px}.unlock-heading h2{font-size:15px;margin:0}.unlock-card p{margin:8px 0 10px;font-size:13px;color:var(--muted);line-height:1.45}.unlock-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.unlock-actions button{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;color:var(--navy);border-radius:12px;padding:9px 13px;font-size:13px;font-weight:750;cursor:pointer}.unlock-actions button.primary{background:var(--navy);border-color:var(--navy);color:#fff}.unlock-actions button:disabled{opacity:.5;cursor:default}.unlock-note{display:block;margin-top:8px;font-size:12px;color:var(--muted)}.chip-row button.locked{display:inline-flex;align-items:center;gap:4px;opacity:.55}.take-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:14px}.take-actions button{min-height:42px;border:1px solid var(--line);background:#fff;border-radius:13px;display:flex;gap:7px;align-items:center;justify-content:center;font-weight:750;color:var(--navy);cursor:pointer}.take-actions button:disabled{opacity:.5;cursor:default}.take-actions small{grid-column:1 / -1;font-size:12px;color:var(--muted);text-align:center}.history-card article .take-play{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--navy);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;margin-left:10px;margin-right:12px;flex:none}.history-card article .take-play.playing{background:var(--navy);color:#fff;border-color:var(--navy)}.speech-consent{margin:1rem 0;padding:.85rem 1rem;border:1px solid #dfd8ce;border-radius:16px;background:#faf7f1;text-align:left}.speech-consent label{display:flex;align-items:center;gap:.6rem;font-weight:600;cursor:pointer}.speech-consent input{width:1.2rem;height:1.2rem;flex-shrink:0;accent-color:#2c6b60}.speech-consent p{margin:.5rem 0 0;font-size:.8rem;line-height:1.55;color:#635c52}.speech-consent a{color:inherit;text-underline-offset:3px}