*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--yamanote-green: #9acd32;--yamanote-dark: #7cb518;--bg-primary: #0a0f1c;--bg-secondary: #141b2d;--bg-card: #1a2238;--text-primary: #f0f4f8;--text-secondary: #94a3b8;--accent-correct: #22c55e;--accent-wrong: #ef4444;--accent-hover: #b8e055;--shadow-glow: 0 0 30px rgba(154, 205, 50, .3);font-family:Noto Sans JP,Hiragino Sans,Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,sans-serif;line-height:1.6;font-weight:400;color:var(--text-primary);background:var(--bg-primary);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{min-height:100vh;background:radial-gradient(ellipse at 20% 0%,rgba(154,205,50,.1) 0%,transparent 50%),radial-gradient(ellipse at 80% 100%,rgba(124,181,24,.08) 0%,transparent 50%),linear-gradient(180deg,var(--bg-primary) 0%,var(--bg-secondary) 100%);background-attachment:fixed}.app{min-height:100vh;display:flex;flex-direction:column}.header{padding:1.5rem 2rem;text-align:center;border-bottom:1px solid rgba(154,205,50,.2);background:#0a0f1ccc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:sticky;top:0;z-index:100}.title{font-size:1.8rem;font-weight:700;color:var(--yamanote-green);display:flex;align-items:center;justify-content:center;gap:.5rem;letter-spacing:.05em;text-shadow:0 0 20px rgba(154,205,50,.5)}.title-icon{font-size:2rem;animation:train-move 3s ease-in-out infinite}@keyframes train-move{0%,to{transform:translate(0)}50%{transform:translate(5px)}}.title-sub{font-size:.9rem;font-weight:400;color:var(--text-secondary);margin-left:.5rem}.main{flex:1;display:flex;align-items:center;justify-content:center;padding:2rem}.footer{padding:1rem 2rem;text-align:center;color:var(--text-secondary);font-size:.85rem;border-top:1px solid rgba(154,205,50,.1)}.loading{font-size:1.2rem;color:var(--text-secondary);animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.quiz-container{width:100%;max-width:600px}.progress{margin-bottom:2rem}.progress-text{display:block;text-align:center;margin-bottom:.5rem;color:var(--text-secondary);font-size:.95rem}.progress-bar{height:8px;background:var(--bg-card);border-radius:4px;overflow:hidden;box-shadow:inset 0 2px 4px #0000004d}.progress-fill{height:100%;background:linear-gradient(90deg,var(--yamanote-dark),var(--yamanote-green));border-radius:4px;transition:width .3s ease;box-shadow:0 0 10px var(--yamanote-green)}.question-card{background:var(--bg-card);border-radius:20px;padding:2.5rem;box-shadow:0 10px 40px #0006,var(--shadow-glow);border:1px solid rgba(154,205,50,.2)}.prompt{font-size:1.5rem;font-weight:600;text-align:center;margin-bottom:2rem;color:var(--text-primary);line-height:1.4}.choices{display:grid;gap:1rem}.choice-button{padding:1.2rem 1.5rem;font-size:1.2rem;font-weight:500;border:2px solid rgba(154,205,50,.3);border-radius:12px;background:#9acd320d;color:var(--text-primary);cursor:pointer;transition:all .2s ease;font-family:inherit}.choice-button:hover:not(:disabled){background:#9acd3226;border-color:var(--yamanote-green);transform:translateY(-2px);box-shadow:0 5px 20px #9acd3233}.choice-button:active:not(:disabled){transform:translateY(0)}.choice-button:disabled{cursor:not-allowed;opacity:.7}.choice-button.correct{background:#22c55e33;border-color:var(--accent-correct);color:var(--accent-correct);box-shadow:0 0 20px #22c55e4d}.choice-button.wrong{background:#ef444433;border-color:var(--accent-wrong);color:var(--accent-wrong);box-shadow:0 0 20px #ef44444d}.score-display{text-align:center;margin-top:1.5rem;color:var(--text-secondary);font-size:.95rem}.result-container{width:100%;max-width:600px}.result-card{background:var(--bg-card);border-radius:20px;padding:2.5rem;box-shadow:0 10px 40px #0006,var(--shadow-glow);border:1px solid rgba(154,205,50,.2);text-align:center}.result-title{font-size:1.8rem;font-weight:700;color:var(--yamanote-green);margin-bottom:2rem}.result-score{font-size:4rem;font-weight:700;display:flex;align-items:baseline;justify-content:center;gap:.3rem}.score-number{color:var(--yamanote-green);text-shadow:0 0 30px rgba(154,205,50,.5)}.score-divider,.score-total{color:var(--text-secondary);font-size:2.5rem}.result-percentage{font-size:1.5rem;color:var(--text-secondary);margin:.5rem 0 1rem}.result-message{font-size:1.8rem;margin-bottom:2rem}.wrong-answers{margin-top:2rem;text-align:left;border-top:1px solid rgba(154,205,50,.2);padding-top:1.5rem}.wrong-title{font-size:1.2rem;font-weight:600;color:var(--text-primary);margin-bottom:1rem}.wrong-list{list-style:none}.wrong-item{background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:10px;padding:1rem;margin-bottom:.75rem}.wrong-prompt{font-weight:500;margin-bottom:.5rem;color:var(--text-primary)}.wrong-details{display:flex;flex-direction:column;gap:.25rem;font-size:.9rem}.wrong-chosen{color:var(--accent-wrong)}.wrong-correct{color:var(--accent-correct)}.retry-button{margin-top:2rem;padding:1rem 3rem;font-size:1.1rem;font-weight:600;border:none;border-radius:12px;background:linear-gradient(135deg,var(--yamanote-dark),var(--yamanote-green));color:var(--bg-primary);cursor:pointer;transition:all .2s ease;font-family:inherit;box-shadow:0 5px 20px #9acd324d}.retry-button:hover{transform:translateY(-2px);box-shadow:0 8px 30px #9acd3266}.retry-button:active{transform:translateY(0)}@media(max-width:640px){.header{padding:1rem}.title{font-size:1.4rem}.title-sub{display:none}.main{padding:1rem}.question-card,.result-card{padding:1.5rem;border-radius:16px}.prompt{font-size:1.25rem}.choice-button{padding:1rem;font-size:1.1rem}.result-score{font-size:3rem}.score-divider,.score-total{font-size:2rem}}