@import url(https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700;900&family=Space+Mono:wght@400;700&display=swap);*{box-sizing:border-box;margin:0;padding:0}html{height:100%;height:-webkit-fill-available}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#0f0f1a;color:#fff;font-family:Noto Sans JP,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0;overscroll-behavior:none;padding:0;touch-action:manipulation}#root,body{min-height:100%;min-height:-webkit-fill-available}body{overscroll-behavior-y:contain}::-webkit-scrollbar{height:0;width:0}button,input,select,textarea{font-family:inherit}.App{min-height:100vh;min-height:-webkit-fill-available;width:100%}:root{--bg-primary:#0f0f1a;--bg-secondary:#1a1a2e;--bg-card:#252542;--accent-primary:#ff6b9d;--accent-secondary:#c44569;--accent-tertiary:#6c5ce7;--success:#00d9a0;--success-glow:#00d9a04d;--error:#ff4757;--error-glow:#ff47574d;--text-primary:#fff;--text-secondary:#ffffffb3;--text-muted:#fff6}.quiz-container{-webkit-overflow-scrolling:touch;background:#0f0f1a;background:var(--bg-primary);background-image:radial-gradient(ellipse at 20% 0,#ff6b9d26 0,#0000 50%),radial-gradient(ellipse at 80% 100%,#6c5ce726 0,#0000 50%);display:flex;flex-direction:column;min-height:100vh;min-height:-webkit-fill-available;overflow-y:auto;padding:max(20px,env(safe-area-inset-top)) 20px max(20px,env(safe-area-inset-bottom))}.quiz-container.quiz-active{justify-content:flex-start;overflow:hidden}.quiz-title{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,#ff6b9d,#6c5ce7);background:linear-gradient(135deg,var(--accent-primary) 0,var(--accent-tertiary) 100%);-webkit-background-clip:text;background-clip:text;font-family:Noto Sans JP,sans-serif;font-size:clamp(2.5rem,10vw,4rem);font-weight:900;letter-spacing:-.02em;margin:0 0 8px;text-align:center}.quiz-subtitle{color:#ffffffb3;color:var(--text-secondary);font-family:Space Mono,monospace;font-size:.9rem;letter-spacing:.15em;margin:0 0 30px;text-align:center;text-transform:uppercase}.settings-section{background:#1a1a2e;background:var(--bg-secondary);border:1px solid #ffffff0d;border-radius:20px;margin-bottom:20px;padding:20px}.settings-title{color:#ff6b9d;color:var(--accent-primary);font-family:Space Mono,monospace;font-size:.85rem;letter-spacing:.1em;margin:0 0 4px;text-transform:uppercase}.settings-hint{color:#fff6;color:var(--text-muted);font-size:.8rem;margin:0 0 16px}.kana-mode-grid{grid-gap:10px;display:grid;gap:10px;grid-template-columns:repeat(3,1fr)}.kana-mode-btn{align-items:center;background:#252542;background:var(--bg-card);border:2px solid #0000;border-radius:14px;cursor:pointer;display:flex;flex-direction:column;gap:6px;padding:16px 10px;transition:all .2s ease}.kana-mode-btn:active{transform:scale(.96)}.kana-mode-btn.active{background:#6c5ce726;border-color:#6c5ce7;border-color:var(--accent-tertiary);box-shadow:0 0 20px #6c5ce733}.kana-mode-char{color:#fff;color:var(--text-primary);font-family:Noto Sans JP,sans-serif;font-size:1.8rem;font-weight:500;line-height:1}.kana-mode-label{color:#fff6;color:var(--text-muted);font-family:Space Mono,monospace;font-size:.7rem;letter-spacing:.05em;text-transform:uppercase}.vowel-grid{grid-gap:10px;display:grid;gap:10px;grid-template-columns:repeat(3,1fr);margin-bottom:12px}.vowel-btn{align-items:center;background:#252542;background:var(--bg-card);border:2px solid #0000;border-radius:14px;cursor:pointer;display:flex;flex-direction:column;gap:4px;padding:14px 10px;transition:all .2s ease}.vowel-btn:active{transform:scale(.96)}.vowel-btn.active{background:#ff6b9d26;border-color:#ff6b9d;border-color:var(--accent-primary);box-shadow:0 0 20px #ff6b9d33}.vowel-label{color:#fff;color:var(--text-primary);font-family:Space Mono,monospace;font-size:1.5rem;font-weight:700}.vowel-example{color:#fff6;color:var(--text-muted);font-family:Noto Sans JP,sans-serif;font-size:.75rem}.quick-select{display:flex;gap:10px}.quick-btn{background:#0000;border:1px solid #ffffff1a;border-radius:10px;color:#ffffffb3;color:var(--text-secondary);cursor:pointer;flex:1 1;font-family:Space Mono,monospace;font-size:.75rem;letter-spacing:.05em;padding:10px;text-transform:uppercase;transition:all .2s ease}.quick-btn:active{background:#ffffff0d;transform:scale(.98)}.toggle-group{display:flex;flex-direction:column;gap:12px}.toggle-label{align-items:center;cursor:pointer;display:flex;gap:12px}.toggle-label input[type=checkbox]{accent-color:#ff6b9d;accent-color:var(--accent-primary);cursor:pointer;height:24px;width:24px}.toggle-text{color:#fff;color:var(--text-primary);font-family:Noto Sans JP,sans-serif;font-size:1rem}.start-btn{background:linear-gradient(135deg,#ff6b9d,#c44569);background:linear-gradient(135deg,var(--accent-primary) 0,var(--accent-secondary) 100%);border:none;border-radius:16px;box-shadow:0 8px 30px #ff6b9d4d;color:#fff;cursor:pointer;font-family:Space Mono,monospace;font-size:1.1rem;font-weight:700;letter-spacing:.1em;padding:18px;text-transform:uppercase;transition:all .2s ease;width:100%}.start-btn:active{box-shadow:0 4px 15px #ff6b9d4d;transform:scale(.98)}.char-count{color:#fff6;color:var(--text-muted);font-size:.85rem;margin-top:12px;text-align:center}.quiz-header{gap:12px;justify-content:space-between;margin-bottom:20px}.back-btn,.quiz-header{align-items:center;display:flex}.back-btn{background:#1a1a2e;background:var(--bg-secondary);border:none;border-radius:12px;color:#ffffffb3;color:var(--text-secondary);cursor:pointer;flex-shrink:0;font-size:1.2rem;height:40px;justify-content:center;transition:all .2s ease;width:40px}.back-btn:active{background:#252542;background:var(--bg-card);transform:scale(.95)}.stats-row{align-items:center;display:flex;gap:16px}.stat-item{color:#00d9a0;color:var(--success);font-family:Space Mono,monospace;font-size:.95rem}.stat-item.accuracy{color:#6c5ce7;color:var(--accent-tertiary)}.stat-item.streak{animation:pulse-streak .5s ease;color:#ffa502}@keyframes pulse-streak{0%,to{transform:scale(1)}50%{transform:scale(1.2)}}.question-section{flex-shrink:0;margin-bottom:24px;text-align:center}.question-label{color:#fff6;color:var(--text-muted);font-family:Space Mono,monospace;font-size:.85rem;letter-spacing:.1em;margin:0 0 16px;text-transform:uppercase}.hiragana-display{color:#fff;color:var(--text-primary);font-family:Noto Sans JP,sans-serif;font-size:clamp(6rem,25vw,10rem);font-weight:400;line-height:1;padding:20px;transition:all .3s ease}.hiragana-display.correct{animation:pop-correct .4s ease;color:#00d9a0;color:var(--success);text-shadow:0 0 40px #00d9a04d;text-shadow:0 0 40px var(--success-glow)}.hiragana-display.wrong{animation:shake .4s ease;color:#ff4757;color:var(--error);text-shadow:0 0 40px #ff47574d;text-shadow:0 0 40px var(--error-glow)}@keyframes pop-correct{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}@keyframes shake{0%,to{transform:translateX(0)}20%,60%{transform:translateX(-8px)}40%,80%{transform:translateX(8px)}}.options-grid{grid-gap:12px;display:grid;gap:12px;grid-template-columns:repeat(2,1fr);margin-bottom:20px}.option-btn{background:#1a1a2e;background:var(--bg-secondary);border:2px solid #ffffff1a;border-radius:16px;color:#fff;color:var(--text-primary);cursor:pointer;font-family:Space Mono,monospace;font-size:1.25rem;font-weight:700;padding:20px 16px;transition:all .15s ease}.option-btn:active:not(:disabled){background:#252542;background:var(--bg-card);transform:scale(.97)}.option-btn.correct{animation:pop-correct .3s ease;background:#00d9a0;background:var(--success);border-color:#00d9a0;border-color:var(--success);color:#0f0f1a}.option-btn.wrong{animation:shake .3s ease;background:#ff4757;background:var(--error);border-color:#ff4757;border-color:var(--error);color:#fff}.option-btn.disabled{cursor:default;opacity:.4}.feedback-section{animation:slide-up .3s 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.stat-value{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,#ff6b9d,#6c5ce7);background:linear-gradient(135deg,var(--accent-primary),var(--accent-tertiary));-webkit-background-clip:text;background-clip:text;font-size:3rem}.stat-row{grid-gap:12px;display:grid;gap:12px;grid-template-columns:1fr 1fr}.stat-value{color:#fff;color:var(--text-primary);font-size:2rem;font-weight:700}.stat-label,.stat-value{font-family:Space Mono,monospace}.stat-label{color:#fff6;color:var(--text-muted);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase}.results-actions{display:flex;flex-direction:column;gap:12px;max-width:320px;width:100%}.action-btn{border:none;border-radius:14px;cursor:pointer;font-family:Space Mono,monospace;font-size:1rem;font-weight:700;letter-spacing:.05em;padding:16px;text-transform:uppercase;transition:all .2s ease;width:100%}.action-btn.primary{background:linear-gradient(135deg,#ff6b9d,#c44569);background:linear-gradient(135deg,var(--accent-primary) 0,var(--accent-secondary) 100%);box-shadow:0 8px 30px #ff6b9d4d;color:#fff}.action-btn.secondary{background:#1a1a2e;background:var(--bg-secondary);border:1px solid #ffffff1a;color:#ffffffb3;color:var(--text-secondary)}.action-btn:active{transform:scale(.98)}@media (max-width:380px){.quiz-container{padding:16px}.vowel-grid{grid-template-columns:repeat(2,1fr)}.vowel-btn{padding:12px 8px}.option-btn{font-size:1.1rem;padding:16px 12px}}@media (min-width:600px){.quiz-container{margin:0 auto;max-width:500px}.vowel-grid{grid-template-columns:repeat(6,1fr)}.options-grid{grid-template-columns:repeat(4,1fr)}}button{-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}@media (prefers-reduced-motion:no-preference){.quiz-container{scroll-behavior:smooth}}
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