:root{--bg:#f6f7f1;--surface:#fff;--tint:#f1f5ea;--text:#2b3a2e;--muted:#6b7764;--line:#e2e8da;--green:#4c683b;--green-dark:#3a5230;--good:#5d9a38;--warn:#b97c12;--accent:#ef6f2e;--brand:#33a35f;--word:#1b7944;color:var(--text);background:var(--bg);font-synthesis:none;-webkit-font-smoothing:antialiased;font-family:Nunito,"M PLUS Rounded 1c",sans-serif}*{box-sizing:border-box}html,body,#root{overscroll-behavior:none;height:100%;overflow:hidden}body{background:var(--bg);min-width:280px;margin:0}button{font:inherit;color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border:0}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,summary:focus-visible{outline-offset:3px;outline:3px solid #7f9c5c}a{color:inherit}img{max-width:100%}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.skip-link{z-index:20;background:#fff;padding:10px;position:fixed;top:-60px;left:10px}.skip-link:focus{top:10px}.spin{animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.app{max-width:1600px;height:100dvh;padding:env(safe-area-inset-top,0px) max(16px, env(safe-area-inset-right,0px)) max(16px, env(safe-area-inset-bottom,0px)) max(16px, env(safe-area-inset-left,0px));flex-direction:column;margin:0 auto;display:flex}.app main{outline:none;flex-direction:column;flex:1;min-height:0;display:flex}.learning-workspace{flex:1;grid-template-columns:200px minmax(0,1fr);gap:16px;min-height:0;display:grid}.lesson-sidebar{flex-direction:column;min-width:0;min-height:0;display:flex}.sidebar-heading{color:var(--muted);justify-content:space-between;margin:0;padding:12px 6px;font-size:13px;font-weight:600;display:flex}.sidebar-heading span{font-weight:400}.site-header{border-bottom:1px solid var(--line);flex:none;justify-content:space-between;align-items:center;gap:12px;height:64px;margin-bottom:12px;display:flex}.brand{--brand-size:48px;font-size:calc(var(--brand-size) * .75);letter-spacing:-.025em;white-space:nowrap;color:var(--brand);flex:none;align-items:center;gap:8px;font-weight:700;line-height:1.1;text-decoration:none;display:flex}.brand-mark{width:var(--brand-size);height:var(--brand-size);object-fit:contain;flex:none;display:block}.header-tagline{letter-spacing:.04em;text-align:right;flex:1;margin:0;font-size:16px;font-weight:500;line-height:1.5}.header-tagline span{display:inline-block}.header-tagline span+span{margin-left:.3em}.header-actions{flex:none;align-items:center;gap:8px;display:flex}.language-switcher{border:1px solid var(--line);background:var(--surface);border-radius:12px;flex:none;align-items:center;gap:2px;padding:3px;display:inline-flex}.language-switcher button{border-radius:8px;place-items:center;min-width:40px;min-height:36px;padding:0 8px;display:grid}.language-switcher button[aria-pressed=true]{background:#e9f2de;box-shadow:inset 0 0 0 1.5px #a9c391}.language-switcher button:hover:not([aria-pressed=true]){background:var(--tint)}.language-picker-button{height:44px;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:12px;flex:none;align-items:center;gap:4px;padding:0 8px 0 10px;display:inline-flex}.language-picker-button:hover{background:var(--tint)}.language-popup{color:var(--text);background:var(--surface);border:1px solid var(--line);border-radius:14px;margin:0;padding:6px;inset:auto;transform:translate(-100%);box-shadow:0 12px 32px #17251530}.language-popup button{text-align:left;border-radius:10px;align-items:center;gap:10px;width:100%;min-width:164px;min-height:44px;padding:8px 12px;font-size:14px;display:flex}.language-popup button[aria-pressed=true]{background:#e9f2de;font-weight:600}.language-popup button:hover:not([aria-pressed=true]){background:var(--tint)}.language-popup button>svg:last-child:not(.flag){color:var(--green-dark);margin-left:auto}.flag{border-radius:3px;width:24px;height:16px;display:block;box-shadow:0 0 0 1px #2b3a2e2e}.menu-language{border-bottom:1px solid var(--line);color:var(--muted);flex:none;justify-content:space-between;align-items:center;gap:12px;padding:8px 16px;font-size:13px;display:flex}.sign-language-note{background:var(--tint);color:var(--green-dark);border-radius:10px;padding:10px 12px}.lesson-picker{scrollbar-width:thin;scrollbar-color:#b8c5ac transparent;overscroll-behavior:contain;flex-direction:column;flex:1;gap:8px;min-height:0;padding:4px 6px 8px 4px;display:flex;overflow:hidden auto}.lesson-choice{text-align:left;background:var(--surface);border:1.5px solid var(--line);border-radius:16px;flex:none;align-items:center;gap:8px;min-height:72px;padding:8px;transition:border-color .15s,background .15s;display:flex;position:relative}.lesson-choice:hover{border-color:#c3d0b4}.lesson-choice[aria-selected=true]{border-color:var(--green);background:#f3f8ec;box-shadow:0 0 0 3px #4c683b1f}.lesson-thumb{background:var(--tint);border-radius:12px;flex:none;width:44px;height:48px;overflow:hidden}.lesson-thumb img{object-fit:cover;transform-origin:50% 42%;width:100%;height:100%;transform:scaleX(-1)scale(1.35)}.lesson-choice-text{gap:2px;min-width:0;display:grid}.lesson-choice-text strong{font-size:14px;font-weight:650}.lesson-choice-text small{color:var(--muted);font-size:11px}.lesson-done{color:#fff;background:var(--good);border-radius:50%;place-items:center;width:20px;height:20px;display:grid;position:absolute;top:8px;right:8px}.practice-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;flex-direction:column;min-width:0;min-height:0;display:flex;overflow:hidden;box-shadow:0 10px 36px #2c3c2010}.lesson-bar{flex:none;justify-content:space-between;align-items:center;gap:12px;padding:12px 18px 4px;display:flex}.lesson-bar h2{letter-spacing:1px;margin:0;font-size:22px;font-weight:650}.lesson-word{color:var(--word);font-weight:800}.lesson-japanese{letter-spacing:0;color:var(--muted);margin-left:12px;font-size:13px;font-weight:400;display:inline-block}.lesson-bar p{color:var(--muted);margin:2px 0 0;font-size:13px}.lesson-english{letter-spacing:1px;color:#93a086;margin-left:10px;font-size:11px}.lesson-bar>.ghost-button{flex:none}.ghost-button{color:var(--green-dark);background:var(--tint);border-radius:999px;align-items:center;gap:5px;padding:7px 11px;font-size:12px;display:inline-flex}.ghost-button:hover:not(:disabled){background:#e5eed9}.primary-button{color:#fff;background:var(--green);border-radius:999px;justify-content:center;align-items:center;gap:8px;min-height:46px;padding:11px 24px;font-size:14px;font-weight:600;display:inline-flex;box-shadow:0 3px 8px #29431c1c}.primary-button:hover:not(:disabled){background:var(--green-dark)}.text-button{color:var(--muted);margin-top:8px;padding:8px;font-size:12px}.step-tracker{scrollbar-width:thin;overscroll-behavior:contain;counter-reset:step;flex:none;grid-auto-columns:minmax(0,1fr);grid-auto-flow:column;gap:8px;margin:0;padding:8px 18px 12px;list-style:none;display:grid;overflow-x:auto}.step-tracker li{min-width:0;position:relative}.step-tracker li+li:before{content:"";background:var(--line);width:10px;height:2px;position:absolute;top:50%;left:-10px}.step-tracker li[data-state=done]+li:before{background:var(--good)}.step-tracker button{text-align:left;border:1.5px solid var(--line);background:#fafbf7;border-radius:14px;align-items:center;gap:6px;width:100%;height:100%;min-height:48px;padding:5px 8px;display:flex}.step-tracker button:hover{border-color:#c3d0b4}.step-tracker [data-state=done] button{background:#f2f8eb;border-color:#b9d3a0}.step-tracker [data-viewing=true] button{border-color:var(--accent);background:#fff8ef;box-shadow:0 0 0 3px #ef6f2e22}.tracker-thumb .step-picture,.tracker-thumb .step-picture-mirror{height:100%}.tracker-thumb .step-picture img{aspect-ratio:auto;object-fit:cover;height:100%}.tracker-thumb{background:var(--tint);border-radius:10px;flex:none;width:36px;height:36px;overflow:hidden}.step-tracker [data-state=todo] .tracker-thumb{opacity:.6}.tracker-text{grid-template-columns:auto 1fr;align-items:center;gap:2px 7px;min-width:0;display:grid}.tracker-number{width:22px;height:22px;color:var(--muted);border:1.5px solid #cfd8c4;border-radius:50%;place-items:center;font-size:12px;font-weight:700;display:grid;position:relative}.step-tracker [data-state=done] .tracker-number{color:#fff;background:var(--good);border-color:var(--good)}.step-tracker [data-viewing=true] .tracker-number{color:#fff;background:var(--accent);border-color:var(--accent)}.tracker-complete{color:#fff;background:var(--good);border:1.5px solid #fff;border-radius:50%;width:14px;height:14px;padding:1px;position:absolute;bottom:-4px;right:-6px}.tracker-title{font-size:11px;font-weight:600;line-height:1.35}.tracker-text small{color:var(--muted);grid-column:2;font-size:10px}.step-tracker [data-viewing=true] small{color:#98400f;font-weight:700}.preview-playback{flex:none;padding:0 18px 10px}.preview-timeline{gap:4px;height:6px;display:flex}.preview-segment{background:var(--line);border-radius:999px;flex:1;overflow:hidden}.preview-segment>span{background:var(--accent);transform-origin:0;width:100%;height:100%;display:block}.practice-grid{border-top:1px solid var(--line);flex:1;grid-template-columns:minmax(0,.95fr) minmax(0,1.15fr);min-height:0;display:grid}.step-picture{position:relative;overflow:hidden}.step-picture-mirror{position:relative;transform:scaleX(-1)}.step-picture img{aspect-ratio:3/2;object-fit:contain;-webkit-user-select:none;user-select:none;width:100%;height:auto;display:block}.step-motion{pointer-events:none;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.step-path-halo{fill:none;stroke:#fff;stroke-width:26px;stroke-linecap:round;opacity:.9}.step-path{fill:none;stroke:var(--accent);stroke-width:13px;stroke-linecap:round;stroke-dasharray:2 26}.step-traveler{fill:var(--accent);stroke:#fff;stroke-width:5px}.step-target{fill:none;stroke:var(--accent);stroke-width:7px;stroke-dasharray:18 14}.step-guide{border-right:1px solid var(--line);background:#fcfdf9;flex-direction:column;min-width:0;min-height:0;padding:12px 16px;display:flex}.guide-head{flex:none;align-items:center;gap:8px;display:flex}.guide-count{color:var(--muted);flex-shrink:0;font-size:13px}.guide-count strong{color:var(--accent);font-size:18px}.guide-part{color:var(--green-dark);background:var(--tint);border-radius:999px;padding:3px 9px;font-size:12px}.guide-head .ghost-button{flex-shrink:0;margin-left:auto}.guide-title{flex:none;margin:6px 0 8px;font-size:clamp(16px,1.5vw,21px);font-weight:700;line-height:1.45}.guide-stage{border:1px solid var(--line);background:radial-gradient(circle at 50% 40%,#fff 0%,#eef3e6 72%);border-radius:18px;flex:1;justify-content:center;align-items:center;min-height:0;display:flex;position:relative;overflow:hidden}.guide-stage .guide-picture,.guide-stage .step-picture-mirror{width:100%;height:100%}.guide-stage .step-picture img{object-fit:contain;height:100%}.guide-caption{flex:none}.guide-nav{width:38px;height:38px;color:var(--green-dark);border:1px solid var(--line);background:#ffffffd9;border-radius:50%;place-items:center;margin-top:-19px;display:grid;position:absolute;top:50%;box-shadow:0 2px 6px #0001}.guide-nav.prev{left:8px}.guide-nav.next{right:8px}.guide-nav:disabled{opacity:0;pointer-events:none}.mirror-note{color:var(--muted);background:#ffffffd9;border-radius:999px;padding:3px 9px;font-size:11px;position:absolute;bottom:8px;left:10px}.guide-instruction{margin:8px 0 2px;font-size:13px;font-weight:600;line-height:1.6}.guide-points{gap:4px;margin:0;padding:0;list-style:none;display:grid}.guide-points li{color:#4f5c49;padding-left:16px;font-size:13px;line-height:1.7;position:relative}.guide-points li:before{content:"";background:var(--accent);border-radius:50%;width:6px;height:6px;position:absolute;top:.72em;left:3px}.guide-self{color:#6b5a33;background:#fff5e2;border-radius:10px;margin:10px 0 0;padding:8px 11px;font-size:12px;line-height:1.7}.guide-next{color:var(--muted);border-top:1px dashed var(--line);align-items:center;gap:8px;margin:14px 0 0;padding-top:12px;font-size:13px;display:flex}.guide-next span{white-space:nowrap;color:var(--green-dark);background:var(--tint);border-radius:999px;flex:none;padding:2px 8px;font-size:11px;font-weight:700}.camera-panel{flex-direction:column;min-width:0;min-height:0;padding:12px 16px;display:flex;position:relative}.camera-head{flex:none;justify-content:space-between;align-items:center;gap:8px;min-height:28px;display:flex}.camera-title{white-space:nowrap;color:var(--muted);flex:none;font-size:13px;font-weight:600}.status-chips{flex-wrap:wrap;justify-content:flex-end;gap:6px;font-size:11px;display:flex}.status-chips>span[data-ok]{color:#8a5b0b;background:#fff2d6;border-radius:999px;padding:3px 8px}.status-chips>span[data-ok=true]{color:#3f6b26;background:#e8f3dc}.camera-live{color:var(--muted);align-items:center;gap:5px;padding:3px 0 3px 4px;display:inline-flex}.camera-live i{background:#bec6b5;border-radius:50%;width:7px;height:7px}.camera-live.on{color:#3f6b26}.camera-live.on i{background:#6fb043;box-shadow:0 0 0 3px #6fb04333}.now-banner{background:#fff;border:2px solid #d7dfcd;border-radius:14px;flex:none;grid-template-columns:auto 1fr;align-items:center;gap:4px 12px;margin-top:6px;padding:7px 10px 12px;display:grid;position:relative}.now-banner[data-tone=good]{background:#f3faec;border-color:#9fcb7b}.now-banner[data-tone=warn]{background:#fff9eb;border-color:#ebcd8b}.now-step{color:#fff;background:var(--accent);border-radius:12px;place-items:center;min-width:32px;height:32px;padding:0 6px;font-size:15px;font-weight:750;display:grid}.now-banner strong{font-size:14px;font-weight:700;line-height:1.5}.hold-bar{background:#00000010;border-radius:4px;height:4px;position:absolute;bottom:6px;left:14px;right:14px;overflow:hidden}.hold-bar i{background:var(--good);border-radius:4px;height:100%;transition:width .12s linear;display:block}.camera-stage{isolation:isolate;border:1px solid var(--line);background:#eef1e8;border-radius:18px;flex:1;min-height:0;margin-top:6px;position:relative;overflow:hidden}.camera-stage.is-live{background:#1f2721;border-color:#2f4a2f}.camera-video,.camera-look,.camera-overlay{object-fit:contain;visibility:hidden;width:100%;height:100%;position:absolute;inset:0;transform:scaleX(-1)}.camera-stage.is-live .camera-video,.camera-stage.is-live.has-look .camera-look,.camera-stage.is-live .camera-overlay{visibility:visible}.camera-look,.camera-overlay{pointer-events:none}.look-button{z-index:6;max-width:calc(100% - 160px);color:var(--green-dark);border:1px solid var(--line);background:#ffffffeb;border-radius:999px;align-items:center;gap:6px;padding:7px 12px 7px 10px;font-size:11px;font-weight:600;display:flex;position:absolute;bottom:10px;left:10px}.look-button-state{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-weight:500;overflow:hidden}.help-button{z-index:6;width:32px;height:32px;color:var(--green-dark);border:1px solid var(--line);background:#ffffffeb;border-radius:50%;place-items:center;font-size:17px;font-weight:700;line-height:1;display:grid;position:absolute;top:10px;right:10px}.camera-stage.is-live .look-button,.camera-stage.is-live .help-button{color:#f0f5e8;background:#132219c4;border-color:#ffffff30}.camera-stage.is-live .look-button-state{color:#c9d6bd}.look-dialog{width:min(600px,100% - 24px)}.look-dialog .dialog-body{padding:12px 16px 18px}.look-note{color:var(--muted);margin:0 0 10px;line-height:1.7;font-size:12px!important}.look-group{border:0;margin:0 0 12px;padding:0}.look-group legend{margin-bottom:6px;padding:0;font-size:13px;font-weight:700}.look-options{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;display:grid}.look-option{text-align:center;cursor:pointer;justify-items:center;gap:4px;font-size:12px;font-weight:600;line-height:1.3;display:grid}.look-thumb{width:100%;color:var(--muted);background:var(--tint);border:2px solid var(--line);border-radius:14px;place-items:center;font-size:11px;font-weight:500;display:grid;overflow:hidden}.look-thumb-face{aspect-ratio:1;background:#eef4f7}.look-thumb-scene{aspect-ratio:3/2}.look-thumb img{object-fit:cover;width:100%;height:100%;display:block}.look-thumb-face img{transform:scale(1.25)}.look-option input:checked+.look-thumb{border-color:var(--accent);box-shadow:0 0 0 2px #ef6f2e40}.look-option input:focus-visible+.look-thumb{outline-offset:2px;outline:3px solid #7f9c5c}.stop-camera{z-index:6;color:#f0f5e8;background:#132219c4;border:1px solid #ffffff30;border-radius:999px;align-items:center;gap:6px;padding:7px 12px;font-size:11px;display:flex;position:absolute;bottom:10px;right:10px}.camera-empty{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:18px 18px 48px;display:flex;position:absolute;inset:0}.framing-guide{color:#a5b593;flex-shrink:1;width:96px;height:72px;min-height:0;margin-bottom:4px}.camera-empty h3{margin:0 0 8px;font-size:17px;font-weight:650}.camera-empty p{max-width:360px;color:var(--muted);margin:0 0 12px;font-size:13px;line-height:1.8}.camera-error{color:#9b5d2e!important}.step-celebration{z-index:4;color:#fff;pointer-events:none;background:#3f6b26ee;border-radius:16px;align-items:center;gap:10px;width:fit-content;margin:0 auto;padding:9px 16px 9px 10px;animation:.25s ease-out toast-in;display:flex;position:absolute;top:12px;left:12px;right:12px;box-shadow:0 6px 18px #0004}.step-celebration>span:last-child{gap:2px;display:grid}.step-celebration strong{letter-spacing:.5px;font-size:18px}.step-celebration small{opacity:.92;font-size:13px;font-weight:600}.step-celebration .celebration-check{width:38px;height:38px;box-shadow:0 0 0 3px #fff5}@keyframes toast-in{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}.celebration-check{color:#fff;background:var(--good);border-radius:50%;place-items:center;width:60px;height:60px;display:grid;box-shadow:0 0 0 6px #fff5}.complete-panel{z-index:5;text-align:center;background:#f3f9ecf2;flex-direction:column;justify-content:center;align-items:center;padding:20px;animation:.2s ease-out panel-in;display:flex;position:absolute;inset:0}.complete-panel .celebration-check{animation:.55s ease-out both check-pop}.petal-burst{z-index:1;pointer-events:none;width:100%;height:100%;position:absolute;inset:0}@keyframes panel-in{0%{opacity:0}}@keyframes check-pop{0%{opacity:0;transform:scale(.3)}45%{opacity:1;transform:scale(1.18)}70%{transform:scale(.94)}to{transform:none}}.complete-panel h3{margin:12px 0 6px;font-size:24px;font-weight:700}.complete-panel p{color:var(--muted);margin:0 0 16px;font-size:13px}.complete-actions{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.auto-next{justify-items:center;gap:6px;width:min(240px,100%);margin-top:14px;display:grid}.auto-next-bar{background:#00000012;border-radius:999px;width:100%;height:6px;overflow:hidden}.auto-next-bar>span{background:var(--green);transform-origin:0;height:100%;display:block}.auto-next small{color:var(--muted);font-size:12px;font-weight:600}.check-panel{display:contents}.check-panel .detail-button{display:none}.camera-checks h4,.self-check h4{color:var(--muted);margin:0 0 6px;font-size:11px;font-weight:650}.self-check{border-top:1px solid var(--line);margin-top:16px;padding-top:14px}.self-check p{margin:0 0 10px}.criteria{gap:4px;margin:0;padding:0;list-style:none;display:grid}.criteria li{align-items:center;gap:7px;font-size:12px;line-height:1.5;display:flex}.criteria li>span:first-child{color:#9aa690;border:2px solid 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