:root{--color-bg:#0f0f23;--color-bg-secondary:#1a1a2e;--color-bg-card:#1e1e3cb3;--color-surface:#16213e;--color-primary:#6c63ff;--color-primary-light:#8b83ff;--color-primary-dark:#4a41e0;--color-secondary:#00d2ff;--color-accent:#ff6b9d;--color-success:#4caf50;--color-danger:#e53935;--color-warning:#ffb74d;--color-text:#e8e8f0;--color-text-secondary:#a0a0c0;--color-text-muted:#6a6a8a;--font-family:"Lexend", "Inter", system-ui, -apple-system, sans-serif;--font-size-xs:.75rem;--font-size-sm:.875rem;--font-size-base:1rem;--font-size-lg:1.25rem;--font-size-xl:1.5rem;--font-size-2xl:2rem;--font-size-3xl:2.5rem;--font-size-4xl:3.5rem;--space-xs:.25rem;--space-sm:.5rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2rem;--space-2xl:3rem;--radius-sm:6px;--radius-md:12px;--radius-lg:20px;--radius-full:9999px;--shadow-sm:0 2px 8px #0000004d;--shadow-md:0 4px 16px #0006;--shadow-lg:0 8px 32px #00000080;--shadow-glow:0 0 20px #6c63ff4d;--transition-fast:.15s ease;--transition-base:.25s ease;--transition-slow:.4s ease}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;font-size:16px}body{font-family:var(--font-family);background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;overflow-x:hidden}#root{flex-direction:column;min-height:100vh;display:flex}.app-bg{z-index:-1;background:linear-gradient(135deg,#0f0f23 0%,#1a1a2e 50%,#16213e 100%);position:fixed;inset:0;overflow:hidden}.app-bg:before{content:"";background:radial-gradient(circle,#6c63ff26 0%,#0000 70%);width:600px;height:600px;animation:8s ease-in-out infinite float;position:absolute;top:-200px;right:-200px}.app-bg:after{content:"";background:radial-gradient(circle,#00d2ff1a 0%,#0000 70%);width:500px;height:500px;animation:10s ease-in-out infinite reverse float;position:absolute;bottom:-200px;left:-200px}@keyframes float{0%,to{transform:translate(0)scale(1)}50%{transform:translate(30px,-30px)scale(1.1)}}.glass-card{background:var(--color-bg-card);-webkit-backdrop-filter:blur(12px);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);border:1px solid #ffffff14}.btn{justify-content:center;align-items:center;gap:var(--space-sm);padding:var(--space-md) var(--space-xl);font-family:var(--font-family);font-size:var(--font-size-base);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;border:none;font-weight:600;text-decoration:none;display:inline-flex}.btn:active{transform:scale(.96)}.btn-primary{background:linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);color:#fff;box-shadow:0 4px 15px #6c63ff66}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 25px #6c63ff99}.btn-secondary{color:var(--color-text);background:#ffffff14;border:1px solid #ffffff1f}.btn-secondary:hover{background:#ffffff24;border-color:#fff3}.btn-success{background:linear-gradient(135deg, var(--color-success) 0%, #388e3c 100%);color:#fff;box-shadow:0 4px 15px #4caf5066}.btn-danger{background:linear-gradient(135deg, var(--color-danger) 0%, #c62828 100%);color:#fff}.btn-large{padding:var(--space-lg) var(--space-2xl);font-size:var(--font-size-lg);border-radius:var(--radius-lg)}.btn-icon{padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md)}.screen{min-height:100vh;padding:var(--space-xl);flex-direction:column;justify-content:center;align-items:center;animation:.4s fadeIn;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.title{font-size:var(--font-size-4xl);background:linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));-webkit-text-fill-color:transparent;text-align:center;margin-bottom:var(--space-sm);-webkit-background-clip:text;background-clip:text;font-weight:800}.subtitle{font-size:var(--font-size-lg);color:var(--color-text-secondary);text-align:center;margin-bottom:var(--space-2xl)}.stats-grid{gap:var(--space-md);grid-template-columns:repeat(auto-fit,minmax(140px,1fr));width:100%;display:grid}.stat-card{text-align:center;padding:var(--space-lg)}.stat-value{font-size:var(--font-size-2xl);color:var(--color-primary-light);font-weight:700}.stat-label{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-top:var(--space-xs)}.progress-bar{border-radius:var(--radius-full);background:#ffffff14;width:100%;height:8px;overflow:hidden}.progress-fill{border-radius:var(--radius-full);height:100%;transition:width var(--transition-fast)}.progress-fill.success{background:linear-gradient(90deg, var(--color-success), #66bb6a)}.progress-fill.warning{background:linear-gradient(90deg, var(--color-warning), #ffa726)}.progress-fill.danger{background:linear-gradient(90deg, var(--color-danger), #ef5350)}.chip{padding:var(--space-sm) var(--space-md);border-radius:var(--radius-full);font-size:var(--font-size-sm);cursor:pointer;transition:all var(--transition-base);color:var(--color-text-secondary);-webkit-user-select:none;user-select:none;background:#ffffff0d;border:1px solid #ffffff1a;align-items:center;font-weight:500;display:inline-flex}.chip.active{border-color:var(--color-primary);color:var(--color-primary-light);background:#6c63ff33}.chip:hover{background:#ffffff1a}.lives-display{gap:var(--space-xs);display:flex}.life-heart{font-size:var(--font-size-xl);transition:all var(--transition-base)}.life-heart.lost{opacity:.2;transform:scale(.8)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:3px}@media (width<=768px){:root{--font-size-4xl:2.5rem;--font-size-3xl:2rem;--font-size-2xl:1.5rem}.screen{padding:var(--space-md)}.btn-large{padding:var(--space-md) var(--space-lg);font-size:var(--font-size-base)}}@media (width<=480px){:root{--font-size-4xl:2rem;--font-size-3xl:1.5rem}.stats-grid{grid-template-columns:repeat(2,1fr)}}.main-menu{gap:var(--space-xl);width:100%;max-width:500px}.menu-logo{align-items:center;gap:var(--space-sm);flex-direction:column;display:flex}.menu-logo .logo-icon{font-size:4rem;animation:2s ease-in-out infinite bounce}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.menu-tagline{font-size:var(--font-size-sm);color:var(--color-text-muted);text-align:center;max-width:300px}.menu-buttons{gap:var(--space-md);flex-direction:column;width:100%;max-width:320px;display:flex}.menu-buttons .btn{justify-content:center;width:100%}.menu-footer{font-size:var(--font-size-xs);color:var(--color-text-muted);text-align:center}.character-select{gap:var(--space-xl);width:100%;max-width:700px}.character-grid{gap:var(--space-md);grid-template-columns:repeat(auto-fit,minmax(120px,1fr));width:100%;display:grid}.character-card{align-items:center;gap:var(--space-sm);padding:var(--space-lg);cursor:pointer;transition:all var(--transition-base);text-align:center;flex-direction:column;display:flex}.character-card:hover{box-shadow:var(--shadow-glow);border-color:#6c63ff4d;transform:translateY(-4px)}.character-card.selected{border-color:var(--color-primary);background:#6c63ff1a;box-shadow:0 0 25px #6c63ff66}.character-avatar{border-radius:var(--radius-lg);width:80px;height:80px;transition:all var(--transition-base);justify-content:center;align-items:center;font-size:3rem;display:flex}.character-card.selected .character-avatar{transform:scale(1.1)}.character-name{font-size:var(--font-size-sm);color:var(--color-text);font-weight:600}.character-actions{gap:var(--space-md);margin-top:var(--space-md);display:flex}.game-settings{gap:var(--space-xl);width:100%;max-width:600px}.settings-section{width:100%;padding:var(--space-lg)}.settings-section h3{font-size:var(--font-size-base);color:var(--color-text-secondary);margin-bottom:var(--space-md);font-weight:500}.settings-row{gap:var(--space-sm);flex-wrap:wrap;display:flex}.settings-actions{gap:var(--space-md);margin-top:var(--space-md);display:flex}.game-screen{justify-content:flex-start;min-height:100vh;padding:0;position:relative}.game-hud{z-index:100;padding:var(--space-md);pointer-events:none;position:absolute;top:0;left:0;right:0}.hud-top{justify-content:space-between;align-items:flex-start;gap:var(--space-md);pointer-events:auto;display:flex}.hud-score{flex-direction:column;align-items:flex-start;display:flex}.hud-score-value{font-size:var(--font-size-2xl);color:var(--color-primary-light);font-weight:700}.hud-combo{font-size:var(--font-size-sm);color:var(--color-warning);font-weight:600}.hud-right{align-items:flex-end;gap:var(--space-xs);flex-direction:column;display:flex}.hud-question-area{width:100%;max-width:700px;margin:var(--space-md) auto;padding:var(--space-lg);text-align:center;pointer-events:auto}.hud-question-text{font-size:var(--font-size-xl);color:var(--color-text);margin-bottom:var(--space-md);font-weight:600;line-height:1.4}.hud-answers{justify-content:center;gap:var(--space-md);flex-wrap:wrap;display:flex}.hud-answer-btn{align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-lg);border-radius:var(--radius-md);font-family:var(--font-family);font-size:var(--font-size-sm);color:var(--color-text-secondary);cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:all var(--transition-fast);pointer-events:auto;z-index:110;background:#ffffff0d;border:2px solid #ffffff14;font-weight:500;display:flex;position:relative}.hud-answer-btn:hover:not(:disabled){color:var(--color-text);background:#6c63ff26;border-color:#6c63ff66;transform:translateY(-2px);box-shadow:0 4px 12px #6c63ff33}.hud-answer-btn:active:not(:disabled){box-shadow:none;transform:scale(.96)}.hud-answer-btn:disabled{cursor:default;opacity:.85}.hud-answer-key{border-radius:var(--radius-sm);width:28px;height:28px;color:var(--color-primary-light);font-weight:700;font-size:var(--font-size-sm);background:#6c63ff33;justify-content:center;align-items:center;display:inline-flex}.hud-answer-btn.current{border-color:var(--color-primary);color:var(--color-text);background:#6c63ff26}.hud-answer-btn.revealed-correct{border-color:var(--color-success);color:var(--color-success);background:#4caf5033;box-shadow:0 0 12px #4caf504d}.hud-answer-btn.revealed-incorrect{border-color:var(--color-danger);color:var(--color-danger);background:#e5393533;box-shadow:0 0 12px #e539354d}.hud-progress-info{text-align:center;pointer-events:auto}.hud-progress-question{font-size:var(--font-size-sm);color:var(--color-text-secondary);font-weight:600}.hud-progress-time{font-size:var(--font-size-xs);color:var(--color-primary-light);margin-top:var(--space-xs);font-variant-numeric:tabular-nums}.hud-feedback-flash{text-align:center;font-size:var(--font-size-2xl);pointer-events:none;font-weight:700;animation:.3s feedbackPop}.hud-feedback-flash[data-type=correct]{color:var(--color-success)}.hud-feedback-flash[data-type=incorrect]{color:var(--color-danger)}@keyframes feedbackPop{0%{opacity:0;transform:scale(.8)translateY(10px)}60%{opacity:1;transform:scale(1.1)translateY(-2px)}to{opacity:1;transform:scale(1)translateY(0)}}.hud-timer-bar{border-radius:var(--radius-full);background:#ffffff14;width:100%;max-width:700px;height:6px;margin:0 auto;overflow:hidden}.hud-timer-fill{border-radius:var(--radius-full);height:100%;transition:width .1s linear}.hud-bottom-bar{padding:var(--space-md);justify-content:center;gap:var(--space-xl);pointer-events:auto;z-index:100;display:flex;position:absolute;bottom:0;left:0;right:0}.hud-mobile-controls{display:none}@media (width<=768px){.hud-question-text{font-size:var(--font-size-lg)}.hud-answer-btn{font-size:var(--font-size-xs);padding:var(--space-sm) var(--space-md)}.hud-mobile-controls{gap:var(--space-md);pointer-events:auto;display:flex}.mobile-btn{border-radius:var(--radius-md);color:#fff;width:60px;height:60px;font-size:var(--font-size-xl);cursor:pointer;-webkit-tap-highlight-color:transparent;background:#ffffff1a;border:1px solid #fff3;justify-content:center;align-items:center;display:flex}.mobile-btn:active{background:#6c63ff4d}}.game-over{gap:var(--space-xl);width:100%;max-width:600px}.game-over-header{text-align:center}.game-over-header .score-big{font-size:var(--font-size-4xl);background:linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-weight:800}.game-over-header .accuracy-badge{margin-top:var(--space-sm);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-full);font-size:var(--font-size-lg);font-weight:600;display:inline-block}.accuracy-badge.excellent{color:var(--color-success);background:#4caf5033}.accuracy-badge.good{color:var(--color-warning);background:#ffb74d33}.accuracy-badge.needs-work{color:var(--color-danger);background:#e5393533}.topic-breakdown{width:100%}.topic-breakdown h3{font-size:var(--font-size-base);color:var(--color-text-secondary);margin-bottom:var(--space-md)}.topic-row{padding:var(--space-sm) 0;border-bottom:1px solid #ffffff0d;justify-content:space-between;align-items:center;display:flex}.topic-name{font-size:var(--font-size-sm);color:var(--color-text);min-width:120px}.topic-bar-container{margin:0 var(--space-md);flex:1}.topic-accuracy{font-size:var(--font-size-sm);text-align:right;min-width:50px;font-weight:600}.game-over-actions{gap:var(--space-md);display:flex}.analytics-dashboard{gap:var(--space-xl);width:100%;max-width:800px;padding-top:var(--space-2xl);justify-content:flex-start}.analytics-header{justify-content:space-between;align-items:center;width:100%;display:flex}.analytics-section{width:100%;padding:var(--space-lg)}.analytics-section h3{font-size:var(--font-size-lg);color:var(--color-text);margin-bottom:var(--space-md)}.analytics-bar-chart{gap:var(--space-sm);flex-direction:column;display:flex}.analytics-bar-row{align-items:center;gap:var(--space-md);display:flex}.analytics-bar-label{font-size:var(--font-size-sm);color:var(--color-text-secondary);min-width:120px}.analytics-bar-track{border-radius:var(--radius-sm);background:#ffffff0d;flex:1;height:24px;overflow:hidden}.analytics-bar-fill{border-radius:var(--radius-sm);height:100%;padding-right:var(--space-sm);font-size:var(--font-size-xs);color:#fff;min-width:40px;transition:width var(--transition-slow);justify-content:flex-end;align-items:center;font-weight:600;display:flex}.session-history{gap:var(--space-sm);flex-direction:column;max-height:300px;display:flex;overflow-y:auto}.session-row{padding:var(--space-md);border-radius:var(--radius-md);background:#ffffff08;border:1px solid #ffffff0d;justify-content:space-between;align-items:center;display:flex}.session-date{font-size:var(--font-size-sm);color:var(--color-text-secondary)}.session-stats{gap:var(--space-lg);display:flex}.session-stat{text-align:center}.session-stat .value{color:var(--color-text);font-weight:600}.session-stat .label{font-size:var(--font-size-xs);color:var(--color-text-muted)}.no-data{text-align:center;color:var(--color-text-muted);padding:var(--space-2xl);font-size:var(--font-size-base)}