:root{--primary: #6C5CE7;--primary-light: #A29BFE;--primary-dark: #5A4BD1;--secondary: #00CEC9;--secondary-light: #55EFC4;--accent: #FDCB6E;--accent-dark: #F39C12;--success: #00B894;--success-light: #55EFC4;--danger: #FF7675;--danger-light: #FFB8B8;--warning: #FFEAA7;--info: #74B9FF;--bg: #F0F0FF;--bg-warm: #FFF8F0;--bg-card: #FFFFFF;--bg-card-hover: #F8F8FF;--text: #2D3436;--text-light: #636E72;--text-muted: #B2BEC3;--text-white: #FFFFFF;--xp-gradient: linear-gradient(135deg, #6C5CE7, #A29BFE);--success-gradient: linear-gradient(135deg, #00B894, #55EFC4);--danger-gradient: linear-gradient(135deg, #FF7675, #FDCB6E);--world-1: #4CAF50;--world-2: #FF9800;--world-3: #9C27B0;--world-4: #2196F3;--shadow-sm: 0 2px 8px rgba(108, 92, 231, .08);--shadow-md: 0 4px 16px rgba(108, 92, 231, .12);--shadow-lg: 0 8px 32px rgba(108, 92, 231, .16);--shadow-glow: 0 0 20px rgba(108, 92, 231, .3);--radius-sm: 10px;--radius-md: 16px;--radius-lg: 24px;--radius-xl: 32px;--radius-full: 9999px;--font: "Nunito", 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infinite}.quest-node.completed{border-color:var(--success);background:#f0fff4}.quest-node.locked{opacity:.5;cursor:not-allowed}.quest-node.boss{border-color:var(--accent-dark);background:#fffdf0}.quest-node.boss.completed{background:#fff8e1}.quest-connector{width:3px;height:24px;background:#e0e0e0;margin-left:36px}.quest-connector.completed{background:var(--success)}.quest-icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:24px;flex-shrink:0}.stars-display{display:flex;gap:2px;font-size:18px}.question-area{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px}.question-stem{font-size:24px;font-weight:800;text-align:center;margin-bottom:32px;line-height:1.4;max-width:600px}.option-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;width:100%;max-width:500px}.option-btn{padding:18px 20px;border:3px solid #E8E8F0;border-radius:var(--radius-lg);background:var(--bg-card);font-family:var(--font);font-size:18px;font-weight:700;cursor:pointer;transition:all var(--transition);display:flex;align-items:center;gap:12px;min-height:64px}.option-btn:hover{border-color:var(--primary);background:#f8f6ff;transform:scale(1.02)}.option-btn:active{transform:scale(.98)}.option-btn.selected{border-color:var(--primary);background:#ede9ff}.option-btn.correct{border-color:var(--success);background:#dffff0;animation:correctPop .4s ease}.option-btn.wrong{border-color:var(--danger);background:#fff0f0;animation:shake .4s ease}.option-letter{width:32px;height:32px;border-radius:50%;background:#f0f0ff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;color:var(--primary);flex-shrink:0}.option-btn.correct .option-letter{background:var(--success);color:#fff}.option-btn.wrong .option-letter{background:var(--danger);color:#fff}.fill-blank-input{width:200px;padding:18px 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