:root{--vl-palette-slate-50: #F8FAFC;--vl-palette-slate-100: #F1F5F9;--vl-palette-slate-200: #E2E8F0;--vl-palette-slate-300: #CBD5E1;--vl-palette-slate-400: #94A3B8;--vl-palette-slate-500: #64748B;--vl-palette-slate-600: #475569;--vl-palette-slate-700: #334155;--vl-palette-slate-800: #1E293B;--vl-palette-slate-850: #172033;--vl-palette-slate-900: #0F172A;--vl-palette-slate-950: #070B14;--vl-palette-brand-50: #ECFBFC;--vl-palette-brand-100: #D0F4F7;--vl-palette-brand-200: #A4E8EE;--vl-palette-brand-300: #6CD5DF;--vl-palette-brand-400: #33B9C7;--vl-palette-brand-500: #0E8F9E;--vl-palette-brand-600: #0A7684;--vl-palette-brand-700: #0A5E6A;--vl-palette-brand-800: #0B4A54;--vl-palette-brand-900: #0B3C45;--vl-palette-brand-950: #04252B;--vl-palette-accent-50: #FEF7EC;--vl-palette-accent-100: #FCEBCD;--vl-palette-accent-200: #F9D497;--vl-palette-accent-300: #F5BC62;--vl-palette-accent-400: #F2A33C;--vl-palette-accent-500: #E0871B;--vl-palette-accent-600: #BC6814;--vl-palette-accent-700: #964C14;--vl-palette-accent-800: #7A3D17;--vl-palette-accent-900: #653316;--vl-palette-accent-950: #3A1A08;--vl-palette-success-50: #ECFBF2;--vl-palette-success-100: #D1F5E0;--vl-palette-success-200: #A6EAC4;--vl-palette-success-300: #6DD8A1;--vl-palette-success-400: #3DBF80;--vl-palette-success-500: #2E9E62;--vl-palette-success-600: #217E4E;--vl-palette-success-700: #1C6440;--vl-palette-success-800: #1A5035;--vl-palette-success-900: #17422D;--vl-palette-success-950: #072516;--vl-palette-warn-50: #FEF9EC;--vl-palette-warn-100: #FBEFC9;--vl-palette-warn-200: #F7DC8E;--vl-palette-warn-300: #F2C453;--vl-palette-warn-400: #EEAC2C;--vl-palette-warn-500: #D9922B;--vl-palette-warn-600: #B06C18;--vl-palette-warn-700: #8D5016;--vl-palette-warn-800: #754018;--vl-palette-warn-900: #633517;--vl-palette-warn-950: #3A1B08;--vl-palette-danger-50: #FDF3F3;--vl-palette-danger-100: #FBE5E5;--vl-palette-danger-200: #F7CFCF;--vl-palette-danger-300: #F0AEAE;--vl-palette-danger-400: #E57F7F;--vl-palette-danger-500: #D1544F;--vl-palette-danger-600: #BE3832;--vl-palette-danger-700: #9F2B27;--vl-palette-danger-800: #842723;--vl-palette-danger-900: #6E2624;--vl-palette-danger-950: #3C0F0E;--vl-palette-info-50: #EFF5FE;--vl-palette-info-100: #E1ECFD;--vl-palette-info-200: #C9DDFB;--vl-palette-info-300: #A8C7F8;--vl-palette-info-400: #7FA7F2;--vl-palette-info-500: #3D7FD9;--vl-palette-info-600: #2D64BC;--vl-palette-info-700: #264F98;--vl-palette-info-800: #24457E;--vl-palette-info-900: #223C69;--vl-palette-info-950: #172646;--vl-palette-violet-50: #F5F3FE;--vl-palette-violet-100: #EBE8FD;--vl-palette-violet-200: #D9D4FB;--vl-palette-violet-300: #BDB2F7;--vl-palette-violet-400: #9C87F1;--vl-palette-violet-500: #7C5CD6;--vl-palette-violet-600: #6C42C7;--vl-palette-violet-700: #5C34A8;--vl-palette-violet-800: #4D2D8A;--vl-palette-violet-900: #412970;--vl-palette-violet-950: #28194A;--vl-palette-rose-50: #FDF2F6;--vl-palette-rose-100: #FCE7EF;--vl-palette-rose-200: #FBCFDF;--vl-palette-rose-300: #F8A8C5;--vl-palette-rose-400: #F274A2;--vl-palette-rose-500: #D1557F;--vl-palette-rose-600: #BE3763;--vl-palette-rose-700: #A02850;--vl-palette-rose-800: #862445;--vl-palette-rose-900: #72233E;--vl-palette-rose-950: #440E1F;--vl-palette-cyan-50: #EEFAFD;--vl-palette-cyan-100: #D4F2FA;--vl-palette-cyan-200: #AEE5F4;--vl-palette-cyan-300: #75D1EB;--vl-palette-cyan-400: #35B5D9;--vl-palette-cyan-500: #2A94B8;--vl-palette-cyan-600: #1F7796;--vl-palette-cyan-700: #1D607A;--vl-palette-cyan-800: #1D5065;--vl-palette-cyan-900: #1C4255;--vl-palette-cyan-950: #0C2A39;--vl-palette-amber-50: #FDFAEC;--vl-palette-amber-100: #FAF2CB;--vl-palette-amber-200: #F5E392;--vl-palette-amber-300: #EFCF59;--vl-palette-amber-400: #E9B92F;--vl-palette-amber-500: #C99020;--vl-palette-amber-600: #A96E1A;--vl-palette-amber-700: #874E19;--vl-palette-amber-800: #703F1B;--vl-palette-amber-900: #60341B;--vl-palette-amber-950: #381A0A;--vl-bg-canvas: #F8FAFC;--vl-bg-surface: #FFFFFF;--vl-bg-surface-raised: #FFFFFF;--vl-bg-surface-sunken: #F1F5F9;--vl-bg-inverse: #0F172A;--vl-fg-primary: #0F172A;--vl-fg-secondary: #475569;--vl-fg-tertiary: #64748B;--vl-fg-onBrand: #FFFFFF;--vl-fg-inverse: #F8FAFC;--vl-border-subtle: #E2E8F0;--vl-border-strong: #CBD5E1;--vl-border-focus: #0E8F9E;--vl-action-primary-bg: #0A7684;--vl-action-primary-bgHover: #0A5E6A;--vl-action-primary-fg: #FFFFFF;--vl-action-secondary-bg: #F1F5F9;--vl-action-secondary-fg: #0F172A;--vl-action-danger-bg: #BE3832;--vl-action-danger-fg: #FFFFFF;--vl-score-high: #217E4E;--vl-score-mid: #B06C18;--vl-score-low: #BE3832;--vl-score-unknown: #64748B;--vl-pillar-speak: #D1557F;--vl-pillar-words: #A96E1A;--vl-pillar-grammar: #7C5CD6;--vl-pillar-listen: #2A94B8;--vl-pillar-confidence: #0E8F9E;--vl-streak-flame: #E0871B;--vl-streak-freeze: #7FA7F2;--vl-meter-ample: #2E9E62;--vl-meter-low: #D9922B;--vl-meter-exhausted: #94A3B8;--vl-type-display-size: 40px;--vl-type-display-line: 44px;--vl-type-display-weight: 700;--vl-type-display-tracking: -.5px;--vl-type-title1-size: 30px;--vl-type-title1-line: 36px;--vl-type-title1-weight: 700;--vl-type-title1-tracking: -.3px;--vl-type-title2-size: 24px;--vl-type-title2-line: 30px;--vl-type-title2-weight: 650;--vl-type-title2-tracking: -.2px;--vl-type-title3-size: 20px;--vl-type-title3-line: 26px;--vl-type-title3-weight: 600;--vl-type-headline-size: 18px;--vl-type-headline-line: 24px;--vl-type-headline-weight: 600;--vl-type-body-size: 17px;--vl-type-body-line: 25px;--vl-type-body-weight: 400;--vl-type-bodyStrong-size: 17px;--vl-type-bodyStrong-line: 25px;--vl-type-bodyStrong-weight: 600;--vl-type-callout-size: 16px;--vl-type-callout-line: 22px;--vl-type-callout-weight: 400;--vl-type-subhead-size: 15px;--vl-type-subhead-line: 20px;--vl-type-subhead-weight: 500;--vl-type-footnote-size: 13px;--vl-type-footnote-line: 18px;--vl-type-footnote-weight: 400;--vl-type-caption-size: 12px;--vl-type-caption-line: 16px;--vl-type-caption-weight: 500;--vl-type-caption-tracking: .2px;--vl-type-mono-size: 15px;--vl-type-mono-line: 22px;--vl-type-mono-weight: 450;--vl-type-targetLarge-size: 28px;--vl-type-targetLarge-line: 38px;--vl-type-targetLarge-weight: 500;--vl-type-targetBody-size: 19px;--vl-type-targetBody-line: 28px;--vl-type-targetBody-weight: 400;--vl-type-scoreNumeral-size: 34px;--vl-type-scoreNumeral-line: 38px;--vl-type-scoreNumeral-weight: 700;--vl-font-ui: "Inter var", Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--vl-font-target: "Noto Sans", "Noto Sans JP", "Noto Sans KR", "Noto Sans SC", "Noto Sans TC", "Noto Sans Arabic", sans-serif;--vl-font-mono: "Charis SIL", "Doulos SIL", "Gentium Plus", serif;--vl-space-0: 0px;--vl-space-1: 4px;--vl-space-2: 8px;--vl-space-3: 12px;--vl-space-4: 16px;--vl-space-5: 20px;--vl-space-6: 24px;--vl-space-8: 32px;--vl-space-10: 40px;--vl-space-12: 48px;--vl-space-16: 64px;--vl-space-20: 80px;--vl-radius-sm: 8px;--vl-radius-md: 12px;--vl-radius-lg: 16px;--vl-radius-xl: 20px;--vl-radius-2xl: 28px;--vl-radius-pill: 9999px;--vl-elevation-e0: none;--vl-elevation-e1: 0 1px 2px rgba(7, 11, 20, .06);--vl-elevation-e2: 0 2px 8px rgba(7, 11, 20, .08);--vl-elevation-e3: 0 8px 24px rgba(7, 11, 20, .12);--vl-elevation-e4: 0 16px 40px rgba(7, 11, 20, .18);--vl-motion-instant-duration: 0ms;--vl-motion-instant-easing: linear;--vl-motion-fast-duration: .12s;--vl-motion-fast-easing: cubic-bezier(.2, 0, .4, 1);--vl-motion-base-duration: .2s;--vl-motion-base-easing: cubic-bezier(.2, 0, .2, 1);--vl-motion-slow-duration: .32s;--vl-motion-slow-easing: cubic-bezier(.2, 0, .1, 1);--vl-motion-celebrate-duration: .64s;--vl-motion-celebrate-easing: cubic-bezier(.34, 1.56, .64, 1);--vl-min-target: 44px;--vl-bottom-inset: 96px;--vl-mic-size: 72px;--vl-content-reading: 640px;--vl-content-dashboard: 1120px}@media (prefers-color-scheme: dark){:root{--vl-bg-canvas: #070B14;--vl-bg-surface: #0F172A;--vl-bg-surface-raised: #172033;--vl-bg-surface-sunken: #070B14;--vl-bg-inverse: #F8FAFC;--vl-fg-primary: #F8FAFC;--vl-fg-secondary: #94A3B8;--vl-fg-tertiary: #64748B;--vl-fg-onBrand: #070B14;--vl-fg-inverse: #0F172A;--vl-border-subtle: #1E293B;--vl-border-strong: #334155;--vl-border-focus: #33B9C7;--vl-action-primary-bg: #6CD5DF;--vl-action-primary-bgHover: #A4E8EE;--vl-action-primary-fg: #070B14;--vl-action-secondary-bg: #1E293B;--vl-action-secondary-fg: #F8FAFC;--vl-action-danger-bg: #F0AEAE;--vl-action-danger-fg: #070B14;--vl-score-high: #3DBF80;--vl-score-mid: #EEAC2C;--vl-score-low: #E57F7F;--vl-score-unknown: #94A3B8;--vl-pillar-speak: #F274A2;--vl-pillar-words: #E9B92F;--vl-pillar-grammar: #9C87F1;--vl-pillar-listen: #35B5D9;--vl-pillar-confidence: #33B9C7;--vl-streak-flame: #F2A33C;--vl-streak-freeze: #A8C7F8;--vl-meter-ample: #3DBF80;--vl-meter-low: #EEAC2C;--vl-meter-exhausted: #475569}}:root[data-theme=dark]{--vl-bg-canvas: #070B14;--vl-bg-surface: #0F172A;--vl-bg-surface-raised: #172033;--vl-bg-surface-sunken: #070B14;--vl-bg-inverse: #F8FAFC;--vl-fg-primary: #F8FAFC;--vl-fg-secondary: #94A3B8;--vl-fg-tertiary: #64748B;--vl-fg-onBrand: #070B14;--vl-fg-inverse: #0F172A;--vl-border-subtle: #1E293B;--vl-border-strong: #334155;--vl-border-focus: #33B9C7;--vl-action-primary-bg: #6CD5DF;--vl-action-primary-bgHover: #A4E8EE;--vl-action-primary-fg: #070B14;--vl-action-secondary-bg: #1E293B;--vl-action-secondary-fg: #F8FAFC;--vl-action-danger-bg: #F0AEAE;--vl-action-danger-fg: #070B14;--vl-score-high: #3DBF80;--vl-score-mid: #EEAC2C;--vl-score-low: #E57F7F;--vl-score-unknown: #94A3B8;--vl-pillar-speak: #F274A2;--vl-pillar-words: #E9B92F;--vl-pillar-grammar: #9C87F1;--vl-pillar-listen: #35B5D9;--vl-pillar-confidence: #33B9C7;--vl-streak-flame: #F2A33C;--vl-streak-freeze: #A8C7F8;--vl-meter-ample: #3DBF80;--vl-meter-low: #EEAC2C;--vl-meter-exhausted: #475569}:root[data-theme=light]{--vl-bg-canvas: #F8FAFC;--vl-bg-surface: #FFFFFF;--vl-bg-surface-raised: #FFFFFF;--vl-bg-surface-sunken: #F1F5F9;--vl-bg-inverse: #0F172A;--vl-fg-primary: #0F172A;--vl-fg-secondary: #475569;--vl-fg-tertiary: #64748B;--vl-fg-onBrand: #FFFFFF;--vl-fg-inverse: #F8FAFC;--vl-border-subtle: #E2E8F0;--vl-border-strong: #CBD5E1;--vl-border-focus: #0E8F9E;--vl-action-primary-bg: #0A7684;--vl-action-primary-bgHover: #0A5E6A;--vl-action-primary-fg: #FFFFFF;--vl-action-secondary-bg: #F1F5F9;--vl-action-secondary-fg: #0F172A;--vl-action-danger-bg: #BE3832;--vl-action-danger-fg: #FFFFFF;--vl-score-high: #217E4E;--vl-score-mid: #B06C18;--vl-score-low: #BE3832;--vl-score-unknown: #64748B;--vl-pillar-speak: #D1557F;--vl-pillar-words: #A96E1A;--vl-pillar-grammar: #7C5CD6;--vl-pillar-listen: #2A94B8;--vl-pillar-confidence: #0E8F9E;--vl-streak-flame: #E0871B;--vl-streak-freeze: #7FA7F2;--vl-meter-ample: #2E9E62;--vl-meter-low: #D9922B;--vl-meter-exhausted: #94A3B8}:root[data-score-palette=colorblind]{--vl-score-high: #264F98;--vl-score-mid: #64748B;--vl-score-low: #A96E1A;--vl-score-unknown: #475569}@media (prefers-color-scheme: dark){:root[data-score-palette=colorblind]{--vl-score-high: #A8C7F8;--vl-score-mid: #94A3B8;--vl-score-low: #EFCF59;--vl-score-unknown: #CBD5E1}}:root[data-score-palette=colorblind][data-theme=dark]{--vl-score-high: #A8C7F8;--vl-score-mid: #94A3B8;--vl-score-low: #EFCF59;--vl-score-unknown: #CBD5E1}:root[data-score-palette=colorblind][data-theme=light]{--vl-score-high: #264F98;--vl-score-mid: #64748B;--vl-score-low: #A96E1A;--vl-score-unknown: #475569}@media (prefers-reduced-motion: reduce){:root{--vl-motion-fast-duration: 0ms;--vl-motion-base-duration: 0ms;--vl-motion-slow-duration: 0ms;--vl-motion-celebrate-duration: 0ms}}.vl-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}:where(button,a,input,select,textarea,[tabindex]):focus-visible{outline:3px solid var(--vl-border-focus);outline-offset:2px;border-radius:var(--vl-radius-sm)}.vl-button{display:inline-flex;align-items:center;justify-content:center;gap:var(--vl-space-2);min-height:var(--vl-min-target);min-width:var(--vl-min-target);padding:0 var(--vl-space-5);border:1px solid transparent;border-radius:var(--vl-radius-pill);font:inherit;font-size:var(--vl-type-body-size);font-weight:600;line-height:var(--vl-type-body-line);cursor:pointer;transition:background-color var(--vl-motion-fast-duration) var(--vl-motion-fast-easing),transform var(--vl-motion-fast-duration) var(--vl-motion-fast-easing)}.vl-button[data-full-width=true]{width:100%}.vl-button:active:not(:disabled){transform:scale(.98)}.vl-button:disabled{opacity:.5;cursor:not-allowed}.vl-button--primary{background:var(--vl-action-primary-bg);color:var(--vl-action-primary-fg)}.vl-button--primary:hover:not(:disabled){background:var(--vl-action-primary-bgHover)}.vl-button--secondary{background:var(--vl-action-secondary-bg);color:var(--vl-action-secondary-fg)}.vl-button--ghost{background:transparent;color:var(--vl-fg-secondary)}.vl-button--ghost:hover:not(:disabled){color:var(--vl-fg-primary)}.vl-button--danger{background:var(--vl-action-danger-bg);color:var(--vl-action-danger-fg)}.vl-button--sm{min-height:36px;padding:0 var(--vl-space-3);font-size:var(--vl-type-footnote-size)}.vl-button--lg{min-height:56px;font-size:var(--vl-type-headline-size)}.vl-link{background:none;border:0;padding:var(--vl-space-1) 0;color:var(--vl-action-primary-bg);font:inherit;text-decoration:underline;cursor:pointer}.vl-icon-button{display:inline-grid;place-items:center;min-width:var(--vl-min-target);min-height:var(--vl-min-target);background:none;border:0;border-radius:var(--vl-radius-pill);color:var(--vl-fg-secondary);cursor:pointer}.vl-spinner{width:1em;height:1em;border:2px solid currentColor;border-top-color:transparent;border-radius:50%;animation:vl-spin .7s linear infinite}@keyframes vl-spin{to{transform:rotate(360deg)}}.vl-score-ring{position:relative;display:inline-grid;place-items:center}.vl-score-ring__track{stroke:var(--vl-border-subtle)}.vl-score-ring__value{stroke:var(--vl-score-mid);transition:stroke-dashoffset var(--vl-motion-celebrate-duration) var(--vl-motion-celebrate-easing)}.vl-score-ring[data-band=native_like] .vl-score-ring__value,.vl-score-ring[data-band=great] .vl-score-ring__value{stroke:var(--vl-score-high)}.vl-score-ring[data-band=keep_going] .vl-score-ring__value{stroke:var(--vl-score-low)}.vl-score-ring[data-status=withheld] .vl-score-ring__track{stroke:var(--vl-score-unknown);stroke-dasharray:4 6}.vl-score-ring__content{position:absolute;display:grid;place-items:center;text-align:center}.vl-score-ring__numeral{font-size:var(--vl-type-scoreNumeral-size);font-weight:var(--vl-type-scoreNumeral-weight);font-variant-numeric:tabular-nums;color:var(--vl-fg-primary)}.vl-score-ring__band{font-size:var(--vl-type-caption-size);font-weight:var(--vl-type-caption-weight);color:var(--vl-fg-secondary)}.vl-score-ring__dash{font-size:var(--vl-type-title1-size);color:var(--vl-score-unknown)}.vl-score-bar{display:grid;gap:var(--vl-space-1);padding-block:var(--vl-space-2)}.vl-score-bar__header{display:flex;justify-content:space-between;align-items:baseline}.vl-score-bar__label{font-size:var(--vl-type-subhead-size);color:var(--vl-fg-secondary)}.vl-score-bar__numeral{font-variant-numeric:tabular-nums;font-weight:600;color:var(--vl-fg-primary)}.vl-score-bar__delta[data-direction=up]{color:var(--vl-score-high)}.vl-score-bar__delta[data-direction=down]{color:var(--vl-score-low)}.vl-score-bar__track{height:8px;border-radius:var(--vl-radius-pill);background:var(--vl-bg-surface-sunken);overflow:hidden}.vl-score-bar__fill{height:100%;border-radius:var(--vl-radius-pill);background:var(--vl-score-mid);transition:width var(--vl-motion-base-duration) var(--vl-motion-base-easing)}.vl-score-bar[data-band=native_like] .vl-score-bar__fill,.vl-score-bar[data-band=great] .vl-score-bar__fill{background:var(--vl-score-high)}.vl-score-bar[data-band=keep_going] .vl-score-bar__fill{background:var(--vl-score-low)}.vl-score-bar[data-band=unknown] .vl-score-bar__fill{background:var(--vl-score-unknown)}.vl-score-bar__band{font-size:var(--vl-type-caption-size);color:var(--vl-fg-tertiary)}.vl-withheld{display:grid;gap:var(--vl-space-3);padding:var(--vl-space-4);border:1px dashed var(--vl-border-strong);border-radius:var(--vl-radius-lg);background:var(--vl-bg-surface-sunken)}.vl-withheld__message{margin:0;color:var(--vl-fg-secondary)}.vl-word-score{display:flex;flex-wrap:wrap;gap:var(--vl-space-2);font-size:var(--vl-type-targetLarge-size);line-height:var(--vl-type-targetLarge-line)}.vl-word-score__word{background:none;border:0;border-bottom:3px solid var(--vl-score-mid);padding:0 2px;font:inherit;color:var(--vl-fg-primary);cursor:pointer}.vl-word-score__word:disabled{cursor:default}.vl-word-score__word[data-band=native_like],.vl-word-score__word[data-band=great]{border-bottom-color:var(--vl-score-high)}.vl-word-score__word[data-band=keep_going]{border-bottom-color:var(--vl-score-low)}.vl-phoneme{display:grid;gap:var(--vl-space-3);padding:var(--vl-space-4);border:1px solid 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(prefers-reduced-motion: reduce){.vl-value-dots span{transition:none}}.vl-quiz__thread{display:flex;flex-direction:column;gap:var(--vl-space-4);list-style:none;margin:0;padding:0;max-width:var(--vl-content-reading)}.vl-quiz__exchange{display:flex;flex-direction:column;gap:var(--vl-space-2)}.vl-quiz__tutor{font-size:var(--vl-type-body-size);line-height:var(--vl-type-body-line);color:var(--vl-fg-primary);margin:0;text-wrap:pretty}.vl-quiz__learner{align-self:flex-end;margin:0;padding:var(--vl-space-2) var(--vl-space-3);border-radius:var(--vl-radius-md);background:var(--vl-bg-surface-raised);color:var(--vl-fg-secondary);font-size:var(--vl-type-footnote-size)}.vl-quiz__chips{display:flex;flex-wrap:wrap;gap:var(--vl-space-2);list-style:none;margin:var(--vl-space-4) 0 0;padding:0}.vl-chip{min-block-size:44px;padding-inline:var(--vl-space-4);border-radius:999px;border:1px solid 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0;padding:0}.vl-promises__card{padding:var(--vl-space-3);border:1px solid var(--vl-border-subtle);border-radius:var(--vl-radius-md);background:var(--vl-bg-surface)}.vl-promises__card[data-lead=true]{border-color:var(--vl-border-strong)}.vl-promises__card h2{margin:0 0 var(--vl-space-1);font-size:var(--vl-type-headline-size);color:var(--vl-fg-primary)}.vl-promises__card p{margin:0;font-size:var(--vl-type-subhead-size);color:var(--vl-fg-secondary)}.vl-settings__code{margin:var(--vl-space-2) 0;font-family:var(--vl-type-mono-family, ui-monospace, monospace);font-size:var(--vl-type-title2-size);letter-spacing:.12em;color:var(--vl-fg-primary)}