@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&family=Noto+Sans+JP:wght@400;500;700&display=swap";:root{--bg-color:#0f172a;--text-color:#f8fafc;--primary-color:#38bdf8;--secondary-color:#1e293b;--accent-color:#fcd34d;--success-color:#4ade80;--danger-color:#f87171;--glass-bg:#1e293bb3;--glass-border:#ffffff1a}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased;justify-content:center;min-height:100vh;font-family:Inter,Noto Sans JP,sans-serif;line-height:1.6;display:flex}#root{background:var(--bg-color);width:100%;max-width:480px;min-height:100vh;position:relative;overflow:hidden;box-shadow:0 0 20px #00000080}.bg-glow{z-index:0;background:radial-gradient(circle,#38bdf826 0%,#0000 70%);border-radius:50%;width:300px;height:300px;position:absolute;top:-100px;left:-100px}.app-container{z-index:1;flex-direction:column;height:100vh;display:flex;position:relative}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:16px}button{cursor:pointer;background:0 0;border:none;outline:none;font-family:inherit}.btn-primary{background:var(--primary-color);color:#0f172a;border-radius:12px;width:100%;padding:14px 24px;font-size:1.1rem;font-weight:700;transition:transform .2s,background .2s;box-shadow:0 4px 14px #38bdf866}.btn-primary:hover{background:#7dd3fc;transform:translateY(-2px)}.btn-primary:active{transform:translateY(0)}.home-screen{text-align:center;flex-direction:column;flex:1;padding:24px;display:flex;overflow-y:auto}.home-screen::-webkit-scrollbar{display:none}.app-title{background:linear-gradient(90deg,#38bdf8,#fcd34d);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:8px;font-size:2.2rem;font-weight:800}.app-subtitle{color:#94a3b8;margin-bottom:40px}.chapter-list{flex-direction:column;gap:16px;width:100%;display:flex}.chapter-card{text-align:left;cursor:pointer;padding:20px;transition:transform .2s}.chapter-card:hover{background:#1e293be6;transform:translateY(-2px)}.chapter-card h3{color:var(--accent-color);margin-bottom:4px;font-size:1.1rem}.chapter-card p{color:#cbd5e1;font-size:.9rem}.story-screen{flex-direction:column;flex:1;height:100vh;display:flex}.story-header{border-bottom:1px solid var(--glass-border);z-index:10;background:#0f172ae6;align-items:center;padding:16px;display:flex}.back-btn{color:var(--primary-color);padding:8px;font-size:1rem}.chat-container{scroll-behavior:smooth;flex-direction:column;flex:1;gap:20px;padding:16px;display:flex;overflow-y:auto}.chat-message{flex-direction:column;max-width:85%;animation:.3s ease-out fadeIn;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.chat-message.rookie{align-self:flex-end;align-items:flex-end}.chat-message.senpai{align-self:flex-start;align-items:flex-start}.speaker-name{color:#94a3b8;margin-bottom:4px;margin-left:4px;margin-right:4px;font-size:.8rem}.chat-bubble{white-space:pre-wrap;border-radius:16px;padding:12px 16px;font-size:1rem;line-height:1.5;box-shadow:0 2px 8px #0003}.chat-message.rookie .chat-bubble{background:var(--primary-color);color:#0f172a;border-bottom-right-radius:4px}.chat-message.senpai .chat-bubble{background:var(--secondary-color);color:var(--text-color);border:1px solid var(--glass-border);border-bottom-left-radius:4px}.story-controls{background:linear-gradient(#0f172a00,#0f172a 50%);padding:16px}.quiz-screen{flex-direction:column;flex:1;justify-content:center;height:100vh;padding:20px;display:flex}.quiz-header{text-align:center;margin-bottom:30px}.quiz-progress{color:#94a3b8;margin-bottom:8px;font-size:.9rem}.quiz-card{text-align:center;flex-direction:column;justify-content:center;min-height:250px;margin-bottom:30px;padding:30px 20px;display:flex}.quiz-question{margin-bottom:30px;font-size:1.2rem;font-weight:600;line-height:1.5}.options-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.option-btn{background:var(--secondary-color);color:var(--text-color);border:1px solid var(--glass-border);border-radius:12px;padding:16px;font-size:1.1rem;font-weight:600;transition:all .2s}.option-btn:hover{border-color:var(--primary-color);background:#38bdf81a}.option-btn.correct{background:var(--success-color);color:#0f172a;border-color:var(--success-color)}.option-btn.wrong{background:var(--danger-color);color:#0f172a;border-color:var(--danger-color)}.result-feedback{margin-top:24px;animation:.3s ease-out fadeIn}.feedback-text{margin-bottom:12px;font-size:1.4rem;font-weight:800}.feedback-text.correct{color:var(--success-color)}.feedback-text.wrong{color:var(--danger-color)}.explanation-box{color:#cbd5e1;text-align:left;border-left:4px solid var(--accent-color);background:#1e293b80;border-radius:8px;margin-bottom:20px;padding:16px;font-size:.95rem}.result-screen{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:24px;display:flex}.score-circle{border:8px solid var(--primary-color);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:150px;height:150px;margin:30px auto;display:flex}.score-number{color:var(--primary-color);font-size:3rem;font-weight:800;line-height:1}.score-max{color:#94a3b8;font-size:1.2rem}