:root{--bg:#faf8f5;--bg-card:#fff;--bg-sunken:#f1eee9;--border:#e7e2da;--divider:#efeae2;--text:#23201b;--text-secondary:#6f6a62;--text-tertiary:#8a837a;--text-faint:#a79e92;--shadow-card:0 20px 40px -24px #23201b40;--mix-base:white;--accent-base:#c1662f;--accent-soft:color-mix(in srgb, var(--accent-base) 16%, var(--mix-base));--accent-text:color-mix(in srgb, var(--accent-base) 75%, black);--accent-ring:color-mix(in srgb, var(--accent-base) 32%, var(--mix-base));--accent-on:#faf8f5;--pass:#4b7a5b;--partial:#b98a2e;--fail:#b4483a;--pass-soft:color-mix(in srgb, var(--pass) 18%, var(--bg-card));--partial-soft:color-mix(in srgb, var(--partial) 18%, var(--bg-card));--fail-soft:color-mix(in srgb, var(--fail) 18%, var(--bg-card));--sans:"Inter", ui-sans-serif, system-ui, sans-serif;--jp:"Noto Sans JP", "Inter", ui-sans-serif, sans-serif;--radius-card:16px;--radius-control:13px;--radius-chip:20px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:var(--text);background:var(--bg);font:15px/1.4 var(--sans);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}:root[data-accent-preset=mono]{--accent-base:var(--text)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]):not([data-theme=dark]){--bg:#1b1815;--bg-card:#242019;--bg-sunken:#18150f;--border:#38322a;--divider:#2f2a22;--text:#f2ece4;--text-secondary:#a79e92;--text-tertiary:#8a8074;--text-faint:#736c61;--shadow-card:0 20px 40px -24px #00000080;--mix-base:black;--accent-soft:color-mix(in srgb, var(--accent-base) 22%, var(--mix-base));--accent-text:color-mix(in srgb, var(--accent-base) 60%, white);--accent-ring:color-mix(in srgb, var(--accent-base) 45%, var(--mix-base));--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--bg:#1b1815;--bg-card:#242019;--bg-sunken:#18150f;--border:#38322a;--divider:#2f2a22;--text:#f2ece4;--text-secondary:#a79e92;--text-tertiary:#8a8074;--text-faint:#736c61;--shadow-card:0 20px 40px -24px #00000080;--mix-base:black;--accent-soft:color-mix(in srgb, var(--accent-base) 22%, var(--mix-base));--accent-text:color-mix(in srgb, var(--accent-base) 60%, white);--accent-ring:color-mix(in srgb, var(--accent-base) 45%, var(--mix-base));--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body{height:100%}body{background:var(--bg);margin:0}#root{min-height:100svh}.jp{font-family:var(--jp)}h1,h2,h3{color:var(--text);margin:0;font-weight:700}a{color:var(--accent-base)}p{margin:0}button{font-family:var(--sans);cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}input,textarea{font-family:var(--sans)}.error{color:var(--fail);font-size:13px}.app-shell{flex-direction:column;min-height:100svh;display:flex}.app-content{flex-direction:column;flex:1;width:100%;max-width:480px;margin:0 auto;padding:0 0 88px;display:flex}.auth-content{flex:1;justify-content:center;align-items:center;width:100%;padding:32px 20px;display:flex}.bottom-nav{padding:12px 8px calc(env(safe-area-inset-bottom,0px) + 12px);background:var(--bg);border-top:1px solid var(--border);z-index:10;justify-content:space-around;align-items:center;display:flex;position:fixed;bottom:0;left:0;right:0}.bottom-nav-item{color:var(--text-faint);background:0 0;border:none;flex-direction:column;align-items:center;gap:4px;padding:2px 6px;font-size:10px;font-weight:600;text-decoration:none;display:flex}.bottom-nav-item svg{stroke:var(--text-faint)}.bottom-nav-item.active{color:var(--text)}.bottom-nav-item.active svg{stroke:var(--text)}.bottom-nav-item .nav-icon-fill{fill:var(--text-faint)}.bottom-nav-item.active .nav-icon-fill{fill:var(--text)}.sidebar-nav{border-right:1px solid var(--border);background:var(--bg);box-sizing:border-box;flex-direction:column;flex-shrink:0;width:232px;height:100vh;padding:28px 16px;display:none;position:sticky;top:0}.sidebar-brand{color:var(--text);margin-bottom:28px;padding:0 10px;font-size:16px;font-weight:800}.sidebar-nav-items{flex-direction:column;gap:2px;display:flex}.sidebar-nav-item{color:var(--text-secondary);text-align:left;background:0 0;border:none;border-radius:10px;align-items:center;gap:12px;padding:10px;font-size:14px;font-weight:600;text-decoration:none;display:flex}.sidebar-nav-item svg{stroke:var(--text-faint);flex-shrink:0}.sidebar-nav-item:hover{background:var(--bg-sunken)}.sidebar-nav-item.active{color:var(--text);background:var(--accent-soft)}.sidebar-nav-item.active svg{stroke:var(--accent-text)}.sidebar-nav-item .nav-icon-fill{fill:var(--text-faint)}.sidebar-nav-item.active .nav-icon-fill{fill:var(--accent-text)}.sidebar-nav-exit{margin-top:auto}.topbar{align-items:center;gap:12px;padding:20px 20px 0;display:flex}.topbar-back{color:var(--text);background:0 0;border:none;padding:4px;line-height:0}.topbar-lang-toggle{border:1px solid var(--border);border-radius:10px;margin-left:auto;display:flex;overflow:hidden}.topbar-lang-toggle button{color:var(--text-tertiary);background:0 0;border:none;padding:6px 12px;font-size:12px;font-weight:600}.topbar-lang-toggle button.active{background:var(--text);color:var(--bg);font-weight:700}.topbar-progress{flex:1;align-items:center;gap:10px;display:flex}.topbar-progress-label{color:var(--text-secondary);white-space:nowrap;font-size:12px;font-weight:700}.progress-track{background:var(--border);border-radius:4px;flex:1;height:5px;overflow:hidden}.progress-fill{background:var(--accent-base);height:100%;transition:width .2s}.context-banner{background:var(--accent-soft);border-radius:14px;flex-direction:column;gap:6px;margin:16px 20px 0;padding:14px 16px;display:flex}.context-banner-eyebrow{letter-spacing:.06em;text-transform:uppercase;color:var(--accent-text);font-size:11px;font-weight:700}.context-banner-body{color:var(--accent-text);font-size:13px;line-height:1.5}.card{border:1px solid var(--border);border-radius:var(--radius-card);background:var(--bg-card);padding:18px}.list-row{border:1px solid var(--border);background:var(--bg-card);color:inherit;border-radius:14px;align-items:center;gap:12px;padding:14px;text-decoration:none;display:flex}.list-row-icon{background:var(--accent-soft);border-radius:10px;flex-shrink:0;width:38px;height:38px}.list-row-title{color:var(--text);font-size:14px;font-weight:700}.list-row-subtitle{color:var(--text-tertiary);font-size:12px}.plain-list{flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.plain-list-row{border-bottom:1px solid var(--divider);color:inherit;align-items:center;gap:12px;padding:14px 4px;text-decoration:none;display:flex}.plain-list-row:last-child{border-bottom:none}.chip{border-radius:var(--radius-chip);letter-spacing:.02em;align-items:center;gap:8px;width:fit-content;padding:6px 12px;font-size:12px;font-weight:800;display:inline-flex}.chip-dot{border-radius:50%;width:7px;height:7px}.verdict-pill-pass{background:var(--pass-soft);color:var(--pass)}.verdict-pill-partial{background:var(--partial-soft);color:var(--partial)}.verdict-pill-fail{background:var(--fail-soft);color:var(--fail)}.btn-primary{border-radius:var(--radius-control);background:var(--accent-base);color:var(--accent-on);border:none;justify-content:center;align-items:center;gap:8px;width:100%;padding:14px;font-size:14px;font-weight:700;display:flex}.btn-secondary{border-radius:var(--radius-control);border:1px solid var(--border);color:var(--text-secondary);background:0 0;justify-content:center;align-items:center;gap:8px;width:100%;padding:12px;font-size:13px;font-weight:600;display:flex}.btn-block-group{padding:16px 20px calc(env(safe-area-inset-bottom,0px) + 26px);flex-direction:column;gap:10px;margin-top:auto;display:flex}.option-list{flex-direction:column;gap:10px;padding:22px 20px;display:flex}.option-button{border-radius:var(--radius-control);border:1px solid var(--border);background:var(--bg-card);color:var(--text);text-align:left;justify-content:space-between;align-items:center;gap:12px;padding:16px;font-size:14px;font-weight:600;display:flex}.option-button.selected{border:1.5px solid var(--accent-base);background:var(--accent-soft)}.option-button.correct{border:1.5px solid var(--pass);background:var(--pass-soft)}.option-button.incorrect{border:1.5px solid var(--fail);background:var(--fail-soft)}.option-button.dimmed{color:var(--text-faint)}.option-button:disabled{opacity:1;cursor:default}.exercise-prompt{text-align:center;flex-direction:column;align-items:center;gap:8px;padding:24px 20px 0;display:flex}.exercise-prompt-hint{color:var(--text-tertiary);font-size:12px}.exercise-prompt-main{color:var(--text);max-width:300px;font-size:19px;font-weight:700}.exercise-prompt-main.jp-lg{font-size:40px}.exercise-prompt-sub{color:var(--text-tertiary);font-size:14px}.word-order-answer{border:1.5px dashed var(--text-faint);border-radius:14px;flex-wrap:wrap;align-items:flex-start;gap:8px;min-height:64px;margin:14px 20px 0;padding:12px;display:flex}.word-chip{border:none;border-radius:10px;padding:9px 16px;font-size:14px;font-weight:600}.word-chip-placed{background:var(--accent-base);color:var(--accent-on)}.word-chip-correct{background:var(--pass);color:var(--accent-on)}.word-chip-incorrect{background:var(--fail);color:var(--accent-on)}.word-chip-bank{border:1px solid var(--border);background:var(--bg-card);color:var(--text)}.word-bank{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:auto;padding:20px;display:flex}.matching-columns{gap:16px;padding:20px;display:flex}.matching-column{flex-direction:column;flex:1;gap:10px;display:flex}.matching-item{border:1px solid var(--border);background:var(--bg-card);color:var(--text);text-align:center;border-radius:12px;padding:14px;font-size:14px;font-weight:600}.matching-item.selected{border:1.5px solid var(--accent-base);background:var(--accent-soft);color:var(--accent-text)}.matching-item.matched{border:1.5px solid var(--pass);background:var(--pass-soft);color:var(--pass)}.matching-item.incorrect{border:1.5px solid var(--fail);background:var(--fail-soft);color:var(--fail)}.true-false-statement{flex:1;justify-content:center;align-items:center;padding:20px;display:flex}.true-false-statement p{color:var(--text);text-align:center;max-width:300px;font-size:20px;font-weight:700;line-height:1.5}.true-false-buttons{gap:14px;padding:20px 20px 40px;display:flex}.true-false-button{text-align:center;border:1.5px solid var(--border);background:var(--bg-card);color:var(--text);border-radius:15px;flex:1;padding:22px;font-size:16px;font-weight:700}.true-false-button.chosen-true{background:var(--accent-base);color:var(--accent-on);border-color:var(--accent-base)}.true-false-button.correct{background:var(--pass-soft);color:var(--pass);border-color:var(--pass)}.true-false-button.incorrect{background:var(--fail-soft);color:var(--fail);border-color:var(--fail)}.true-false-button.dimmed{color:var(--text-faint)}.text-input-area{border-radius:var(--radius-control);border:1px solid var(--border);background:var(--bg-card);width:100%;min-height:110px;color:var(--text);resize:vertical;padding:16px;font-size:14px}.text-input-area::placeholder{color:var(--text-faint)}.dictation-play-button{background:var(--accent-base);border:none;border-radius:50%;justify-content:center;align-items:center;width:76px;height:76px;display:flex}.record-stage{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:18px;padding:20px;display:flex}.record-button-ring{border:2px solid var(--accent-ring);background:0 0;border-radius:50%;justify-content:center;align-items:center;width:84px;height:84px;padding:0;display:flex}.record-button-core{background:var(--accent-base);border-radius:50%;justify-content:center;align-items:center;width:66px;height:66px;display:flex}.record-button-core-icon{background:var(--accent-on);border-radius:6px;width:22px;height:22px}.recording-label{color:var(--text-tertiary);font-size:12px;font-weight:600}.result-body{flex-direction:column;gap:14px;padding:18px 20px 0;display:flex}.result-header-row{justify-content:space-between;align-items:center;display:flex}.result-score{color:var(--text);font-size:22px;font-weight:800}.result-what-happened{flex-direction:column;gap:8px;display:flex}.result-what-happened-title{color:var(--text);font-size:12px;font-weight:700}.result-note{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;gap:8px;padding:12px;display:flex}.result-note-dot{border-radius:50%;flex-shrink:0;width:5px;height:5px;margin-top:6px}.result-note-text{color:var(--text);opacity:.85;font-size:13px;line-height:1.5}.diff-comparison{flex-direction:column;gap:16px;display:flex}.diff-row{flex-direction:column;gap:6px;display:flex}.diff-row-label{text-transform:uppercase;letter-spacing:.05em;color:var(--text-faint);font-size:11px;font-weight:700}.diff-chars{flex-wrap:wrap;gap:10px;display:flex}.diff-char{flex-direction:column;align-items:center;display:flex}.diff-char-kana{font-family:var(--jp);color:var(--text);font-size:26px;font-weight:700;line-height:1}.diff-char-romaji{color:var(--text-faint);text-transform:lowercase;margin-top:4px;font-size:10px;line-height:1}.diff-char-mismatch{background:var(--fail-soft);border-radius:8px;padding:0 4px}.diff-char-mismatch .diff-char-kana,.diff-char-mismatch .diff-char-romaji{color:var(--fail);font-weight:700}.diff-char-gap .diff-char-kana{color:var(--border)}.diff-explanations{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.speak-button{border-radius:var(--radius-control);border:1px solid var(--border);color:var(--text-secondary);background:0 0;justify-content:center;align-items:center;gap:8px;width:100%;padding:12px;font-size:13px;font-weight:600;display:flex}.speak-button-inline{width:auto;padding:6px 12px;font-size:12px}.audio-recorder{flex-direction:column;align-items:center;gap:12px;width:100%;display:flex}.volume-meter{background:var(--bg-sunken);border:1px solid var(--border);border-radius:4px;width:100%;max-width:240px;height:8px;overflow:hidden}.volume-meter-bar{background:var(--accent-base);height:100%;transition:width 60ms linear}.audio-recorder-actions{gap:8px;display:flex}.page{flex-direction:column;gap:14px;padding:22px 20px 20px;display:flex}.page-header{justify-content:space-between;align-items:center;gap:12px;display:flex}.page-title{color:var(--text);font-size:19px;font-weight:800}.page-subtitle{color:var(--text-tertiary);font-size:12px}.filter-chips{gap:8px;padding-bottom:2px;display:flex;overflow-x:auto}.filter-chip{border:1px solid var(--border);color:var(--text-secondary);white-space:nowrap;background:0 0;border-radius:20px;padding:7px 14px;font-size:12px;font-weight:600}.filter-chip.active{background:var(--text);color:var(--bg);border-color:var(--text)}.stat-row{gap:10px;display:flex}.stat-card{border:1px solid var(--border);background:var(--bg-card);border-radius:14px;flex-direction:column;flex:1;gap:4px;padding:14px;display:flex}.stat-card-value{color:var(--text);font-size:20px;font-weight:800}.stat-card-label{color:var(--text-tertiary);font-size:11px}.section-title{color:var(--text);font-size:13px;font-weight:700}.error-bar-row{align-items:center;gap:10px;display:flex}.error-bar-label{width:76px;color:var(--text);flex-shrink:0;font-size:13px;font-weight:700}.error-bar-track{background:var(--divider);border-radius:5px;flex:1;height:10px;overflow:hidden}.error-bar-fill{background:var(--accent-base);height:100%}.error-bar-count{color:var(--text-tertiary);text-align:right;flex-shrink:0;width:32px;font-size:11px}.recent-attempt-row{border-bottom:1px solid var(--divider);align-items:center;gap:10px;padding:9px 0;display:flex}.recent-attempt-row:last-child{border-bottom:none}.recent-attempt-text{color:var(--text);flex:1;font-size:13px}.recent-attempt-when{color:var(--text-faint);font-size:11px}.voice-row{border-radius:var(--radius-control);border:1px solid var(--border);background:var(--bg-card);align-items:center;gap:12px;padding:12px 14px;display:flex}.voice-row-selected{border:1.5px solid var(--accent-base);background:var(--accent-soft)}.voice-row-info{flex-direction:column;flex:1;display:flex}.voice-row-name{color:var(--text);font-size:14px;font-weight:700}.voice-row-detail{color:var(--text-tertiary);font-size:11px}.voice-row-selected .voice-row-detail{color:var(--accent-text)}.voice-row-actions{align-items:center;gap:10px;display:flex}.voice-preview-button{color:var(--accent-base);background:0 0;border:none;padding:4px;font-size:13px;font-weight:700}.voice-select-button{border:1.4px solid var(--text-faint);background:0 0;border-radius:50%;width:26px;height:26px;padding:0}.voice-select-button.selected{background:var(--accent-base);border:none;justify-content:center;align-items:center;display:flex}.appearance-section{flex-direction:column;gap:12px;display:flex}.theme-toggle{gap:8px;display:flex}.theme-toggle-button{border:1px solid var(--border);background:var(--bg-card);color:var(--text-secondary);border-radius:10px;flex:1;padding:10px;font-size:13px;font-weight:600}.theme-toggle-button.active{background:var(--text);color:var(--bg);border-color:var(--text)}.accent-swatches{align-items:center;gap:10px;display:flex}.accent-swatch{cursor:pointer;border:2px solid #0000;border-radius:50%;width:32px;height:32px;padding:0}.accent-swatch.selected{border-color:var(--text)}.accent-custom-input{border:1px solid var(--border);background:var(--bg-card);color:var(--text);border-radius:10px;width:120px;padding:8px 12px;font-size:13px}.auth-page{flex-direction:column;gap:20px;width:100%;max-width:340px;display:flex}.auth-page h1{font-size:24px}.auth-page form{flex-direction:column;gap:14px;display:flex}.auth-page label{color:var(--text-secondary);flex-direction:column;gap:6px;font-size:13px;font-weight:600;display:flex}.auth-page input{border:1px solid var(--border);border-radius:var(--radius-control);background:var(--bg-card);color:var(--text);padding:12px;font-size:14px}.profile-select{text-align:center;flex-direction:column;align-items:center;gap:24px;width:100%;max-width:360px;display:flex}.profile-select h1{font-size:24px}.profile-grid{grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:16px;width:100%;display:grid}.profile-card{border:1px solid var(--border);border-radius:var(--radius-card);background:var(--bg-card);font-family:var(--sans);flex-direction:column;align-items:center;gap:10px;padding:20px 12px;display:flex}.profile-card-avatar{width:56px;height:56px;color:var(--profile-accent,var(--accent-base));background:color-mix(in srgb, var(--profile-accent,var(--accent-base)) 16%, var(--bg-card));border-radius:50%;justify-content:center;align-items:center;font-size:22px;font-weight:800;display:flex}.profile-card-name{color:var(--text);font-size:14px;font-weight:700}.profile-select-fallback{color:var(--text-faint);font-size:12px}.pin-back{color:var(--text-secondary);background:0 0;border:none;align-self:flex-start;padding:4px 8px;font-size:18px}.pin-avatar{width:72px;height:72px;font-size:28px}.pin-dots{gap:14px;display:flex}.pin-dot{border:1.5px solid var(--border);border-radius:50%;width:14px;height:14px}.pin-dot.filled{background:var(--profile-accent,var(--accent-base));border-color:var(--profile-accent,var(--accent-base))}.pin-keypad{grid-template-columns:repeat(3,1fr);gap:12px;width:100%;max-width:260px;display:grid}.pin-key{aspect-ratio:1;border:1px solid var(--border);background:var(--bg-card);color:var(--text);border-radius:50%;font-size:20px;font-weight:600}.pin-key-backspace{color:var(--text-secondary);font-size:16px}.center-message{text-align:center;color:var(--text-tertiary);padding:40px 20px}@media (width>=1024px){.app-shell{flex-direction:row;align-items:flex-start}.sidebar-nav{display:flex}.bottom-nav{display:none}.app-content{max-width:640px;margin:0 auto;padding:0 0 48px}.auth-content{width:100%}}