:root{--color-bg:#fafafa;--color-fg:#222;--color-muted:#666;--color-primary:#2563eb;--color-primary-hover:#1e40af;--color-border:#d4d4d8;--color-card-bg:#fff;--color-disabled:#cbd5e1;--radius:12px;--shadow:0 2px 6px #0000000f;color:var(--color-fg);background:var(--color-bg);-webkit-text-size-adjust:100%;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic UI,Yu Gothic,Meiryo,sans-serif;font-size:18px;line-height:1.5}*{box-sizing:border-box}html,body,#root{height:100%;margin:0;padding:0}body{touch-action:manipulation;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}input,textarea,select,.user-select-text-ok{-webkit-user-select:text;user-select:text}button{font-family:inherit;font-size:inherit;cursor:pointer}h1,h2,h3{margin:0 0 .5em}.app-root{flex-direction:column;min-height:100%;display:flex}.practice-mode-banner{color:#fff;text-align:center;letter-spacing:.02em;background:#f59e0b;padding:6px 12px;font-size:.95rem;font-weight:700}.top-header-actions{align-items:center;gap:12px;display:flex}.top-action-button{border:1px solid var(--color-border);background:var(--color-card-bg);border-radius:var(--radius);min-height:44px;padding:8px 16px;font-size:1rem;font-weight:600}.top-action-button:hover{background:#f3f4f6}.screen{flex:1;width:100%;max-width:1366px;margin:0 auto;padding:24px}.big-button{border-radius:var(--radius);background:var(--color-primary);color:#fff;min-height:64px;box-shadow:var(--shadow);border:none;padding:16px 32px;font-size:1.4rem;font-weight:600}.big-button:hover:not(:disabled){background:var(--color-primary-hover)}.big-button:disabled{background:var(--color-disabled);cursor:not-allowed}.icon-button{border:1px solid var(--color-border);background:var(--color-card-bg);border-radius:50%;width:48px;height:48px;font-size:1.6rem}.back-button{border:1px solid var(--color-border);background:var(--color-card-bg);border-radius:var(--radius);min-height:48px;padding:8px 16px;font-size:1rem}.hint-text{color:var(--color-muted);font-size:.95rem}.note{color:var(--color-muted);font-size:.85rem}.placeholder-card{background:var(--color-card-bg);border:1px dashed var(--color-border);border-radius:var(--radius);margin-top:16px;padding:24px}.todo-list{text-align:left;color:var(--color-muted);padding-left:1.4em}.top-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.top-header h1{font-size:2rem}.range-section{background:var(--color-card-bg);border:1px solid var(--color-border);border-radius:var(--radius);margin-bottom:32px;padding:20px}.grade-toggles{flex-wrap:wrap;gap:16px;margin-bottom:16px;display:flex}.grade-toggle{border:2px solid var(--color-border);border-radius:var(--radius);cursor:pointer;background:#fff;align-items:center;gap:8px;min-height:48px;padding:8px 20px;font-size:1.1rem;display:inline-flex}.grade-toggle input{width:22px;height:22px}.unit-slider{margin-top:12px}.unit-slider select{min-height:40px;margin-left:8px;padding:4px 12px;font-size:1rem}.unit-range{margin-top:12px}.unit-range-title{margin:0 0 8px;font-size:1rem}.unit-range-row{flex-wrap:wrap;align-items:flex-end;gap:8px;display:flex}.unit-range-cell{flex-direction:column;gap:4px;font-size:.9rem;display:flex}.unit-range-cell select{max-width:220px;min-height:40px;padding:4px 12px;font-size:1rem}.unit-range-sep{align-self:center;padding-bottom:8px;font-size:1.1rem}.primary-action{flex-direction:column;align-items:center;gap:12px;display:flex}.quiz-screen{flex-direction:column;gap:10px;max-width:none;height:100dvh;max-height:100dvh;padding:12px 24px;display:flex;overflow:hidden}.quiz-header{flex:none;justify-content:space-between;align-items:center;margin:0;display:flex}.progress{font-size:1.2rem;font-weight:600}.example-prompt{background:var(--color-card-bg);border:1px solid var(--color-border);border-radius:var(--radius);flex-wrap:wrap;flex:none;justify-content:center;align-items:center;gap:24px;padding:10px 16px;display:flex}.example-sentence{flex-wrap:wrap;justify-content:center;align-items:flex-end;gap:4px;font-size:1.6rem;display:flex}.example-fragment{align-items:flex-end;display:inline-flex}.answer-slot-ruby{ruby-align:center;margin:0 4px}.answer-slot-ruby rt{color:var(--color-fg);padding-bottom:4px;font-size:1rem;font-weight:600}.answer-slot{border:1.5px dashed var(--color-primary);min-width:1.2em;min-height:1.2em;color:var(--color-primary);background:#f0f7ff;border-radius:4px;justify-content:center;align-items:center;padding:2px 4px;font-size:1rem;display:inline-flex}.quiz-body{flex:auto;align-items:center;gap:20px;min-height:0;display:grid}.quiz-body--with-answer{grid-template-columns:auto 1fr}.quiz-body--canvas-only{grid-template-columns:1fr;justify-items:center}.quiz-body{border-radius:var(--radius);transition:background-color .3s ease-out}.quiz-body--flash-correct{background-color:#22c55e2e}.answer-area{background:var(--color-card-bg);border:1px dashed var(--color-border);border-radius:var(--radius);flex-direction:column;justify-content:center;align-items:center;gap:12px;height:100%;padding:16px;display:flex}.judge-bar{border-top:1px dashed var(--color-border);flex:none;justify-content:center;align-items:center;gap:24px;min-height:80px;padding:8px 0;display:flex}.retry-label{color:#f59e0b;margin-left:8px;font-size:.95rem}.answer-area-hint{color:var(--color-muted);text-align:center;font-size:1rem}.answer-sheet{flex-direction:column;justify-content:center;align-items:center;gap:16px;width:100%;height:100%;padding:8px;display:flex}.answer-kanji-row{flex-wrap:nowrap;justify-content:center;align-items:flex-end;gap:16px;display:flex}.answer-kanji{color:#1f2937;ruby-align:center;font-family:KanjiStrokeOrders,Hiragino Sans,Yu Gothic,serif;font-size:min(20vh,6rem);line-height:1}.answer-kanji rt{color:var(--color-muted);padding-bottom:4px;font-family:Hiragino Sans,Yu Gothic,sans-serif;font-size:.22em}.answer-meta{text-align:center;flex-direction:column;gap:10px;width:100%;font-size:1rem;display:flex}.answer-sentence{background:#f0f9ff;border-radius:8px;padding:10px 14px;font-size:1.3rem}.answer-sentence-fill{color:var(--color-primary);font-weight:600}.answer-readings-detail{color:var(--color-muted);font-size:.9rem}.answer-readings-label{margin-right:4px;font-weight:600}.answer-readings-detail .sep{margin:0 4px}.judge-buttons{gap:48px;display:flex}.judge-button{border-radius:var(--radius);color:#fff;min-width:200px;min-height:64px;box-shadow:var(--shadow);border:none;padding:12px 32px;font-size:1.4rem;font-weight:700}.judge-button:disabled{background:var(--color-disabled);cursor:not-allowed;box-shadow:none;opacity:.6}.judge-correct{background:#16a34a}.judge-correct:hover:not(:disabled){background:#15803d}.judge-wrong{background:#f59e0b}.judge-wrong:hover:not(:disabled){background:#d97706}.action-buttons{flex-wrap:wrap;justify-content:center;align-items:center;gap:16px;display:flex}.action-retry{background:#f59e0b}.action-retry:hover:not(:disabled){background:#d97706}.action-next{background:var(--color-primary)}.undo-judge-button{min-height:44px;color:var(--color-muted);border:1px solid var(--color-border);border-radius:var(--radius);background:0 0;padding:6px 14px;font-size:.95rem}.undo-judge-button:hover{background:#f3f4f6}@media (width<=999px){.quiz-body--with-answer{grid-template-rows:auto auto;grid-template-columns:1fr}.answer-kanji{font-size:min(18vh,6rem)}}.canvas-section{justify-content:center;display:flex}.canvas-area{flex-direction:column;align-items:center;gap:12px;display:flex}.kanji-canvas{touch-action:none;overscroll-behavior:contain;-webkit-user-select:none;user-select:none;border-radius:var(--radius);box-shadow:var(--shadow);cursor:crosshair;background:#fff}.canvas-actions{gap:16px;display:flex}.canvas-button{border:1px solid var(--color-border);background:var(--color-card-bg);border-radius:var(--radius);min-height:48px;padding:8px 20px;font-size:1rem}.canvas-button:disabled{color:var(--color-disabled);cursor:not-allowed}.result-header{text-align:center;margin-bottom:24px}.result-header h1{font-size:2rem}.result-main{flex-direction:column;gap:32px;max-width:800px;margin:0 auto;display:flex}.result-score{text-align:center;background:var(--color-card-bg);border:1px solid var(--color-border);border-radius:var(--radius);padding:32px 24px}.score-big{color:var(--color-primary);font-size:4rem;font-weight:700;line-height:1}.score-num{color:#16a34a}.score-sep{color:var(--color-muted);margin:0 8px}.score-total{color:var(--color-fg)}.score-percent{color:var(--color-muted);margin-top:12px;font-size:1.2rem}.score-label{color:var(--color-fg);margin-top:8px;font-size:1.2rem}.result-wrong{background:var(--color-card-bg);border:1px solid var(--color-border);border-radius:var(--radius);padding:20px}.result-wrong h2{margin-bottom:16px;font-size:1.2rem}.wrong-kanji-list{flex-wrap:wrap;gap:16px;display:flex}.wrong-kanji-item{border-radius:var(--radius);text-align:center;background:#fff7ed;border:2px solid #f59e0b;min-width:100px;padding:12px 16px}.wrong-kanji-button{cursor:pointer;font-family:inherit;transition:transform .1s,background-color .1s}.wrong-kanji-button:hover{background:#fef3c7;transform:translateY(-2px)}.wrong-kanji-button:active{background:#fde68a;transform:translateY(0)}.practice-screen{flex-direction:column;gap:12px;max-width:none;height:100dvh;padding:12px 24px;display:flex;overflow:hidden}.practice-header{flex:none;align-items:center;gap:24px;display:flex}.practice-title{margin:0;font-size:1.4rem}.practice-title ruby{font-family:KanjiStrokeOrders,Hiragino Sans,Yu Gothic,serif;font-size:1.6rem}.practice-title rt{color:var(--color-muted);padding-bottom:4px;font-size:.55em}.practice-main{flex-direction:column;flex:auto;justify-content:center;align-items:center;gap:20px;min-height:0;display:flex}.practice-canvas-section{justify-content:center;display:flex}.practice-actions{align-items:center;gap:24px;display:flex}.wrong-kanji-char{color:#1f2937;font-family:KanjiStrokeOrders,Hiragino Sans,Yu Gothic,serif;font-size:3rem;line-height:1}.wrong-kanji-reading{color:var(--color-muted);margin-top:4px;font-size:.95rem}.result-actions{flex-wrap:wrap;justify-content:center;gap:16px;display:flex}.result-action-secondary{background:var(--color-muted)}.result-action-secondary:hover:not(:disabled){background:#4b5563}.settings-header{align-items:center;gap:16px;margin-bottom:24px;display:flex}.settings-main{flex-direction:column;gap:24px;max-width:600px;display:flex}.setting-row{background:var(--color-card-bg);border:1px solid var(--color-border);border-radius:var(--radius);padding:20px}.setting-row select{min-height:40px;margin-left:12px;padding:4px 12px;font-size:1rem}.setting-row fieldset{border:none;flex-direction:column;gap:12px;padding:0;display:flex}.setting-row legend{margin-bottom:8px;font-weight:600}.setting-row label{align-items:center;gap:8px;display:flex}.setting-row label input{width:22px;height:22px}.setting-row-practice{background:#fffbeb;border:2px solid #f59e0b}.setting-toggle{cursor:pointer;align-items:center;gap:12px;font-size:1.1rem;font-weight:600;display:flex}.setting-toggle input[type=checkbox]{accent-color:#f59e0b;width:28px;height:28px}.settings-danger-divider{border:none;border-top:1px dashed var(--color-border);margin:32px 0 8px}.setting-row-danger{background:#fef2f2;border:1px solid #fecaca}.danger-details summary{cursor:pointer;color:#b91c1c;list-style:revert;padding:4px 0;font-weight:600}.danger-details[open] summary{margin-bottom:12px}.danger-button{color:#fff;border-radius:var(--radius);background:#dc2626;border:none;min-height:48px;margin-top:12px;padding:10px 24px;font-size:1rem;font-weight:600}.danger-button:hover{background:#b91c1c}.danger-reset-message{border-radius:var(--radius);color:#15803d;background:#dcfce7;border:1px solid #86efac;margin-top:12px;padding:10px 14px;font-weight:600}.modal-overlay{z-index:100;cursor:pointer;background:#00000080;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.modal-dialog{border-radius:var(--radius);cursor:auto;background:#fff;width:100%;max-width:480px;padding:28px 32px;box-shadow:0 10px 40px #00000040}.modal-title{color:#b91c1c;margin:0 0 16px;font-size:1.4rem}.modal-body{margin:0 0 24px;font-size:1.05rem;line-height:1.7}.modal-actions{flex-wrap:wrap;justify-content:flex-end;gap:16px;display:flex}.list-screen{flex-direction:column;gap:16px;width:100%;max-width:1100px;margin:0 auto;padding:16px 24px 32px;display:flex}.list-header{align-items:center;gap:24px;display:flex}.list-header h1{font-size:1.6rem}.list-filter{background:var(--color-card-bg);border:1px solid var(--color-border);border-radius:var(--radius);flex-direction:column;gap:12px;padding:16px;display:flex}.list-summary{border-radius:var(--radius);text-align:center;background:linear-gradient(90deg,#fff7ed 0%,#fce7f3 100%);border:1px solid #fbcfe8;padding:16px 20px;font-size:1.15rem}.list-summary-num{color:#db2777;font-size:2rem;font-weight:700}.list-summary-sep{color:var(--color-muted);margin:0 4px}.list-summary-total{font-size:1.4rem;font-weight:600}.list-summary-label{font-weight:600}.list-main{flex:auto}.kanji-list{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin:0;padding:0;list-style:none;display:grid}.kanji-row{background:var(--color-card-bg);border:1px solid var(--color-border);border-radius:var(--radius);transition:transform .1s,background-color .15s;position:relative}.kanji-row--streak3{background:linear-gradient(135deg,#fce7f3 0%,#fdf2f8 100%);border-color:#f9a8d4;box-shadow:0 2px 8px #ec48992e}.kanji-row-button{text-align:left;cursor:pointer;border-radius:var(--radius);background:0 0;border:none;align-items:center;gap:16px;width:100%;padding:14px 16px;font-family:inherit;display:flex}.kanji-row-button:hover{background:#00000008}.kanji-row-char{color:#1f2937;flex:none;font-family:KanjiStrokeOrders,Hiragino Sans,Yu Gothic,serif;font-size:2.4rem;line-height:1}.kanji-row-reading{color:var(--color-muted);flex:none;min-width:50px;font-size:.9rem}.kanji-row-history{gap:4px;margin-left:auto;display:flex}.history-mark{border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:1.1rem;font-weight:700;display:inline-flex}.history-correct{color:#047857;background:#d1fae5}.history-wrong{color:#c2410c;background:#fed7aa}.history-none{color:var(--color-disabled)}.streak3-badge{filter:drop-shadow(0 2px 3px #db277759);pointer-events:none;font-size:1.6rem;line-height:1;position:absolute;top:-8px;right:-8px}