:root{--bg-canvas: #0c0f14;--bg-surface: #151922;--bg-elevated: #1d2330;--bg-input: #12161f;--border-subtle: #232a38;--border-medium: #323d50;--border-strong: #4f5f7a;--accent-vermilion: #e04836;--accent-vermilion-glow: rgba(224, 72, 54, .2);--accent-bamboo: #d4a359;--accent-bamboo-subtle: rgba(212, 163, 89, .15);--script-hiragana-text: #4ade80;--script-hiragana-bg: rgba(74, 222, 128, .12);--script-hiragana-border: rgba(74, 222, 128, .35);--script-katakana-text: #fb923c;--script-katakana-bg: rgba(251, 146, 60, .12);--script-katakana-border: rgba(251, 146, 60, .35);--status-correct: #2ea043;--status-correct-bg: rgba(46, 160, 67, .12);--status-missed: #e04836;--status-missed-bg: rgba(224, 72, 54, .12);--text-main: #f0f3f8;--text-secondary: #8d98aa;--text-muted: #566173;--font-ui: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-kana: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;--font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-full: 9999px;--app-max-width: 540px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body{background-color:var(--bg-canvas);color:var(--text-main);font-family:var(--font-ui);font-size:15px;line-height:1.5;min-height:100vh;min-height:100dvh;overflow-x:hidden;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}.app-root{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;max-width:var(--app-max-width);margin:0 auto;position:relative;transition:max-width .2s ease}.app-header{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;border-bottom:1px solid var(--border-subtle);background-color:#0c0f14e6;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);position:sticky;top:0;z-index:40}.header-left,.header-right{display:flex;align-items:center;gap:10px}.brand-title{display:flex;align-items:center;gap:8px;-webkit-user-select:none;user-select:none}.brand-kanji{font-family:var(--font-kana);font-weight:700;font-size:1.15rem;color:var(--accent-vermilion);background:#e048361f;padding:2px 7px;border-radius:var(--radius-sm);border:1px solid rgba(224,72,54,.3)}.brand-name{font-size:.82rem;font-weight:700;letter-spacing:.08em;color:var(--text-main)}.icon-button{background:transparent;border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-secondary);width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s ease}.icon-button:hover,.icon-button:focus-visible{border-color:var(--border-medium);color:var(--text-main);background-color:var(--bg-surface);outline:none}.text-button{background:transparent;border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-secondary);height:36px;padding:0 12px;display:flex;align-items:center;gap:6px;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .15s ease}.text-button:hover,.text-button:focus-visible{border-color:var(--accent-bamboo);color:var(--accent-bamboo);background-color:var(--accent-bamboo-subtle);outline:none}.icon-button-subtle{background:transparent;border:none;color:var(--text-secondary);display:flex;align-items:center;gap:6px;padding:6px 10px;border-radius:var(--radius-sm);font-size:.82rem;font-weight:600;cursor:pointer;transition:all .15s ease}.icon-button-subtle:hover,.icon-button-subtle:focus-visible{color:var(--text-main);background-color:var(--bg-elevated);outline:none}.app-main{flex:1;display:flex;flex-direction:column}.view-panel{display:none;flex:1;flex-direction:column;animation:fadeIn .2s ease-out}.view-panel.active{display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.panel-content{padding:20px 18px 36px;display:flex;flex-direction:column;gap:24px}.setup-header{margin-top:4px}.headline{font-size:1.5rem;font-weight:700;color:var(--text-main);letter-spacing:-.02em;margin-bottom:6px}.subheadline{font-size:.9rem;color:var(--text-secondary);line-height:1.45}.setting-group{display:flex;flex-direction:column;gap:10px}.setting-header-row{display:flex;align-items:center;justify-content:space-between}.setting-label{font-size:.84rem;font-weight:600;color:var(--text-secondary);letter-spacing:.02em}.quick-toggles{display:flex;align-items:center;gap:8px}.text-link{background:none;border:none;color:var(--accent-bamboo);font-size:.8rem;font-weight:600;cursor:pointer;padding:0}.text-link:hover{text-decoration:underline}.divider{color:var(--border-medium);font-size:.75rem}.pill-selector{display:grid;gap:8px;background:var(--bg-surface);padding:5px;border-radius:var(--radius-md);border:1px solid var(--border-subtle)}.pill-trio{grid-template-columns:repeat(3,1fr)}.pill-quad{grid-template-columns:repeat(4,1fr)}.pill-quintuple{grid-template-columns:repeat(5,1fr)}.pill-duo{grid-template-columns:repeat(2,1fr)}.pill-btn{background:transparent;border:1px solid transparent;border-radius:calc(var(--radius-md) - 2px);padding:10px 6px;color:var(--text-secondary);font-family:var(--font-ui);font-weight:600;font-size:.86rem;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;transition:all .15s ease;min-height:44px}.pill-btn .pill-sub{font-size:.72rem;font-family:var(--font-kana);color:var(--text-muted);font-weight:400}.pill-btn:hover{color:var(--text-main);background-color:#ffffff08}.pill-btn.active{background:var(--bg-elevated);border-color:var(--border-medium);color:var(--text-main);box-shadow:0 2px 6px #00000040}.pill-btn.active .pill-sub{color:var(--accent-bamboo)}.row-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(115px,1fr));gap:8px}.row-toggle{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:8px 10px;cursor:pointer;display:flex;flex-direction:column;align-items:flex-start;text-align:left;transition:all .15s ease}.row-toggle .row-title{font-size:.82rem;font-weight:600;color:var(--text-secondary)}.row-toggle .row-desc{font-size:.7rem;color:var(--text-muted);margin-top:1px}.row-toggle:hover{border-color:var(--border-medium)}.row-toggle.selected{background:#d4a35914;border-color:var(--accent-bamboo)}.row-toggle.selected .row-title{color:var(--text-main)}.row-toggle.selected .row-desc{color:var(--accent-bamboo)}.setting-grid-two{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media(max-width:480px){.setting-grid-two{grid-template-columns:1fr}}.setup-action-bar{display:flex;flex-direction:column;gap:10px;margin-top:8px}.primary-btn{background-color:var(--accent-vermilion);color:#fff;border:none;border-radius:var(--radius-md);padding:14px 20px;font-size:.98rem;font-weight:700;display:flex;align-items:center;justify-content:center;gap:10px;cursor:pointer;transition:all .15s ease;min-height:50px;box-shadow:0 4px 14px var(--accent-vermilion-glow)}.primary-btn:hover{background-color:#eb5442;transform:translateY(-1px)}.primary-btn:active{transform:translateY(0)}.secondary-btn{background:var(--bg-surface);color:var(--text-main);border:1px solid var(--border-medium);border-radius:var(--radius-md);padding:13px 20px;font-size:.92rem;font-weight:600;display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:all .15s ease;min-height:48px}.secondary-btn:hover{background:var(--bg-elevated);border-color:var(--border-strong)}.card-estimate{text-align:center;font-size:.8rem;color:var(--text-muted)}.drill-layout{display:flex;flex-direction:column;flex:1;min-height:0}.drill-metabar{display:flex;align-items:center;justify-content:space-between;padding:10px 18px}.meta-left,.meta-right{display:flex;align-items:center;gap:10px;flex:1}.meta-right{justify-content:flex-end}.meta-center{display:flex;justify-content:center}.mode-pill{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:3px 8px;border-radius:var(--radius-full);background:var(--bg-elevated);color:var(--text-secondary);border:1px solid var(--border-subtle)}.progress-indicator{font-size:.82rem;font-weight:600;color:var(--text-secondary);font-family:var(--font-mono)}.timer-badge{position:relative;width:44px;height:44px;display:flex;align-items:center;justify-content:center}.timer-svg{width:100%;height:100%;transform:rotate(-90deg)}.timer-bg{fill:none;stroke:var(--bg-elevated);stroke-width:3.2}.timer-stroke{fill:none;stroke:var(--accent-vermilion);stroke-width:3.2;stroke-linecap:round;transition:stroke-dasharray .1s linear,stroke .2s ease}.timer-digits{position:absolute;font-family:var(--font-mono);font-size:.82rem;font-weight:700;color:var(--text-main)}.timer-badge.warning .timer-stroke{stroke:#ff9800}.timer-badge.danger .timer-stroke{stroke:#ff3b30}.progress-bar-track{height:3px;background-color:var(--bg-surface);width:100%}.progress-bar-fill{height:100%;background-color:var(--accent-bamboo);transition:width .25s ease}.drill-stage{flex:1;display:flex;flex-direction:column;padding:16px 18px 24px;width:100%}.drill-responsive-grid{display:flex;flex-direction:column;gap:16px;flex:1}.drill-control-col{display:flex;flex-direction:column;gap:14px}.stage-prompt{text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px}.script-badge{display:inline-flex;align-items:center;gap:6px;font-size:.76rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:4px 14px;border-radius:var(--radius-full);transition:all .2s ease}.badge-hiragana{color:var(--script-hiragana-text);background:var(--script-hiragana-bg);border:1px solid var(--script-hiragana-border);box-shadow:0 0 12px #4ade801a}.badge-katakana{color:var(--script-katakana-text);background:var(--script-katakana-bg);border:1px solid var(--script-katakana-border);box-shadow:0 0 12px #fb923c1a}.romaji-display-wrap{display:inline-flex;align-items:center;justify-content:center;gap:12px;position:relative}.romaji-text{font-family:var(--font-ui);font-size:4.2rem;font-weight:800;line-height:1;color:var(--text-main);letter-spacing:-.04em}.prompt-alt-text{font-size:.8rem;font-weight:600;color:var(--accent-bamboo);background:var(--accent-bamboo-subtle);padding:2px 10px;border-radius:var(--radius-full)}.audio-inline-btn{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--accent-bamboo);width:42px;height:42px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s ease}.audio-inline-btn:hover{background:var(--bg-elevated);border-color:var(--accent-bamboo)}.prompt-hint-sub{font-size:.82rem;color:var(--text-muted)}.drill-action-box{margin-top:auto}.drill-workspace-col{display:flex;flex-direction:column;flex:1}.workspace-container{display:flex;flex-direction:column;flex:1;min-height:260px;position:relative}.drawing-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;flex:1;box-shadow:0 4px 24px #00000059}.canvas-header{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;background:var(--bg-surface);border-bottom:1px solid var(--border-subtle)}.canvas-label{font-size:.76rem;font-weight:700;letter-spacing:.05em;color:var(--text-muted);text-transform:uppercase}.canvas-tools{display:flex;align-items:center;gap:8px}.tool-btn{background:transparent;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-secondary);font-size:.76rem;font-weight:600;padding:5px 10px;display:flex;align-items:center;gap:5px;cursor:pointer}.tool-btn:hover{background:var(--bg-elevated);color:var(--text-main);border-color:var(--border-medium)}.canvas-viewport{position:relative;background-color:#10141c;display:flex;align-items:center;justify-content:center;flex:1;min-height:250px;touch-action:none}.grid-crosshairs{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;opacity:.22}.crosshair-h{position:absolute;top:50%;left:16px;right:16px;height:1px;border-top:1px dashed var(--accent-bamboo)}.crosshair-v{position:absolute;left:50%;top:16px;bottom:16px;width:1px;border-left:1px dashed var(--accent-bamboo)}#writing-canvas{position:relative;z-index:10;cursor:crosshair;width:100%;height:100%}.paper-card{background:var(--bg-surface);border:1px dashed var(--border-medium);border-radius:var(--radius-lg);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:36px 24px;gap:14px;flex:1}.paper-icon-wrap{color:var(--accent-bamboo);background:var(--accent-bamboo-subtle);padding:14px;border-radius:var(--radius-full)}.paper-instruction{font-size:1.05rem;font-weight:700;color:var(--text-main)}.paper-sub{font-size:.84rem;color:var(--text-secondary);max-width:320px;line-height:1.45}.solution-card{position:absolute;top:0;right:0;bottom:0;left:0;z-index:20;background:var(--bg-surface);border:1px solid var(--border-medium);border-radius:var(--radius-lg);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:24px;box-shadow:0 8px 32px #0000008c;animation:popReveal .2s cubic-bezier(.16,1,.3,1)}@keyframes popReveal{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.solution-grid-box{position:relative;width:150px;height:150px;background:#0e1219;border:1px solid var(--border-subtle);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center}.glyph-character{font-family:var(--font-kana);font-size:6rem;line-height:1;color:var(--text-main);-webkit-user-select:none;user-select:none;position:relative;z-index:2}.solution-details{text-align:center}.solution-meta{font-size:.95rem;font-weight:700;color:var(--text-main)}.solution-phonetic{font-size:.82rem;color:var(--text-muted);margin-top:3px}.control-row{display:flex;gap:12px}.btn-reveal{width:100%}.grade-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:14px 12px;border-radius:var(--radius-md);font-family:var(--font-ui);font-size:.94rem;font-weight:700;cursor:pointer;min-height:52px;transition:all .15s ease}.grade-btn .key-hint{font-size:.72rem;font-family:var(--font-mono);opacity:.65;font-weight:500}.btn-incorrect{background:var(--status-missed-bg);border:1px solid var(--status-missed);color:#ff6b5c}.btn-incorrect:hover{background:#e0483638}.btn-correct{background:var(--status-correct-bg);border:1px solid var(--status-correct);color:#4ade80}.btn-correct:hover{background:#2ea0433d}.results-summary-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:30px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px}.results-badge{font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-bamboo)}.results-score{font-size:4rem;font-weight:800;font-family:var(--font-ui);line-height:1;letter-spacing:-.04em;color:var(--text-main);margin:6px 0}.results-headline{font-size:1.05rem;font-weight:600;color:var(--text-secondary)}.stats-row{display:flex;align-items:center;justify-content:center;gap:24px;margin-top:18px;padding-top:18px;border-top:1px solid var(--border-subtle);width:100%}.stat-item{display:flex;flex-direction:column;align-items:center;gap:4px}.stat-label{font-size:.74rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em}.stat-value{font-size:1.35rem;font-weight:700;font-family:var(--font-mono);color:var(--text-main)}.correct-num{color:#4ade80}.missed-num{color:#ff6b5c}.stat-divider{width:1px;height:28px;background-color:var(--border-subtle)}.missed-section{display:flex;flex-direction:column;gap:12px}.section-title-row{display:flex;align-items:center;justify-content:space-between}.section-title{font-size:.95rem;font-weight:700;color:var(--text-main)}.count-tag{font-size:.75rem;font-weight:600;background:var(--status-missed-bg);color:#ff6b5c;padding:2px 8px;border-radius:var(--radius-full)}.missed-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px}.missed-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:12px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;transition:all .15s ease}.missed-card:hover{border-color:var(--accent-bamboo);background:var(--bg-elevated)}.missed-info{display:flex;flex-direction:column}.missed-romaji{font-weight:700;font-size:1.05rem;color:var(--text-main)}.missed-script{font-size:.72rem;color:var(--text-muted);text-transform:capitalize}.missed-glyph{font-family:var(--font-kana);font-size:1.8rem;font-weight:700;color:var(--accent-vermilion)}.results-actions{display:flex;flex-direction:column;gap:10px}.btn-drill-missed{background:var(--accent-bamboo);color:#12151c;box-shadow:0 4px 14px #d4a35940}.btn-drill-missed:hover{background:#e2b26b}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#080a0ed9;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:center;z-index:100;padding:16px;animation:fadeIn .18s ease}.modal-container{background:var(--bg-surface);border:1px solid var(--border-medium);border-radius:var(--radius-lg);width:100%;max-width:960px;max-height:90vh;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 16px 48px #000000b3}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-subtle)}.modal-title{font-size:1.1rem;font-weight:700;color:var(--text-main)}.modal-subtitle{font-size:.8rem;color:var(--text-muted);margin-top:2px}.chart-tab-bar{display:flex;background:var(--bg-canvas);border-bottom:1px solid var(--border-subtle);padding:6px 12px;gap:8px}.tab-btn{flex:1;background:transparent;border:none;border-radius:var(--radius-sm);padding:10px 14px;font-family:var(--font-ui);font-size:.88rem;font-weight:600;color:var(--text-secondary);cursor:pointer;transition:all .15s ease}.tab-btn.active{background:var(--bg-surface);color:var(--accent-bamboo);box-shadow:0 2px 6px #00000040}.modal-body{padding:20px;overflow-y:auto;flex:1;-webkit-overflow-scrolling:touch;display:flex;flex-direction:column;gap:24px}.chart-section{display:flex;flex-direction:column;gap:12px}.chart-section-header{display:flex;align-items:center;justify-content:space-between;padding-bottom:8px;border-bottom:1px solid var(--border-subtle)}.chart-section-title{font-size:.92rem;font-weight:700;color:var(--text-main);letter-spacing:.02em}.chart-section-badge{font-size:.74rem;font-weight:600;color:var(--accent-bamboo);background:var(--accent-bamboo-subtle);padding:2px 10px;border-radius:var(--radius-full)}.chart-matrix{display:grid;gap:8px}.grid-5-col{grid-template-columns:repeat(5,1fr)}.grid-3-col{grid-template-columns:repeat(3,1fr)}.chart-cell{background:var(--bg-canvas);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:10px 6px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;cursor:pointer;transition:all .15s ease;min-height:60px}.chart-cell:hover{border-color:var(--accent-bamboo);background:var(--bg-elevated);transform:translateY(-1px)}.chart-glyph{font-family:var(--font-kana);font-size:1.6rem;font-weight:600;color:var(--text-main);line-height:1.1}.chart-romaji{font-size:.76rem;color:var(--text-muted);font-family:var(--font-mono)}.hidden{display:none!important}@media(min-width:720px){:root{--app-max-width: 760px}.canvas-viewport{min-height:320px}.glyph-character{font-size:7rem}.solution-grid-box{width:170px;height:170px}.grid-3-col{grid-template-columns:repeat(6,1fr)}}@media(min-width:860px)and (orientation:landscape),(min-width:980px){:root{--app-max-width: 1080px}.drill-stage{padding:20px 24px 28px}.drill-responsive-grid{display:grid;grid-template-columns:360px 1fr;gap:24px;align-items:stretch}.drill-control-col{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:28px 24px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 4px 20px #0000004d}.stage-prompt{gap:16px}.romaji-text{font-size:5rem}.workspace-container{height:100%;min-height:420px}.canvas-viewport{min-height:380px}.solution-card{border-radius:var(--radius-lg)}.solution-grid-box{width:200px;height:200px}.glyph-character{font-size:8rem}.setup-container,.results-container{max-width:860px;margin:0 auto;width:100%}}@media(min-width:600px){.app-root{border-left:1px solid var(--border-subtle);border-right:1px solid var(--border-subtle);box-shadow:0 0 60px #00000080}}