*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(to bottom,#1a1a2e,#16213e,#0f3460);min-height:100vh;overflow:hidden;display:flex;justify-content:center;align-items:center}#language-switcher{position:fixed;top:15px;right:15px;z-index:200;display:flex;gap:8px}.lang-btn{width:40px;height:40px;border:2px solid rgba(255,255,255,.3);border-radius:50%;background:#00000080;cursor:pointer;font-size:1.2rem;transition:all .3s ease;display:flex;align-items:center;justify-content:center}.lang-btn:hover{border-color:#fff9;background:#000000b3;transform:scale(1.1)}.lang-btn.active{border-color:#feca57;background:#feca5733;box-shadow:0 0 10px #feca5766}.back-btn{position:fixed;top:15px;left:15px;z-index:200;padding:10px 20px;border:2px solid rgba(255,255,255,.3);border-radius:25px;background:#00000080;color:#fff;text-decoration:none;font-size:.9rem;transition:all .3s ease}.back-btn:hover{border-color:#fff9;background:#000000b3;transform:translate(-3px)}.pause-btn{width:50px;height:50px;border:2px solid rgba(255,255,255,.3);border-radius:50%;background:#00000080;color:#fff;font-size:1.5rem;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;pointer-events:auto}.pause-btn:hover{border-color:#fff9;background:#000000b3;transform:scale(1.1)}.pause-menu{display:flex;flex-direction:column;gap:15px;align-items:center}.pause-divider{width:100%;height:1px;background:#fff3;margin:10px 0}.pause-options{width:100%}.pause-option{display:flex;justify-content:space-between;align-items:center;padding:10px 0}.lang-btn-pause{padding:8px 16px;border:2px solid rgba(255,255,255,.3);border-radius:20px;background:#0000004d;color:#888;cursor:pointer;font-weight:700;transition:all .3s ease}.lang-btn-pause:hover{border-color:#ffffff80;color:#fff}.pause-hint{margin-top:20px;color:#666;font-size:.9rem}.confirm-message{margin-bottom:25px;color:#aaa;font-size:1.1rem}.confirm-buttons .game-button{flex:1;max-width:150px}.back-link{display:inline-block;color:#888;text-decoration:none;font-size:.9rem;transition:color .3s ease}.back-link:hover{color:#fff}#game-canvas{display:block;background:transparent;position:absolute;top:0;left:0;z-index:1}.screen{position:fixed;top:0;left:0;width:100%;height:100%;display:flex;justify-content:center;align-items:center;z-index:100;background:#000000d9;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.hidden,.screen.hidden{display:none}.screen-content{text-align:center;color:#fff;padding:40px;border-radius:20px;background:linear-gradient(135deg,#ffffff1a,#ffffff0d);border:1px solid rgba(255,255,255,.2);box-shadow:0 8px 32px #0000004d;max-width:90%;width:400px}.game-title{font-size:2rem;font-weight:700;text-transform:uppercase;letter-spacing:8px;margin-bottom:10px;background:linear-gradient(45deg,#ff6b6b,#feca57,#48dbfb,#ff9ff3);background-size:300% 300%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:gradient-shift 3s ease infinite}.game-over-title{background:linear-gradient(45deg,#ff4757,#ff6b81);background-size:100% 100%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:none}@keyframes gradient-shift{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}.game-subtitle{font-size:1.2rem;color:#aaa;margin-bottom:30px}.game-buttons{display:flex;flex-direction:column;gap:15px}.game-button{padding:15px 40px;font-size:1.2rem;font-weight:700;text-transform:uppercase;letter-spacing:2px;border:none;border-radius:50px;cursor:pointer;background:linear-gradient(45deg,#667eea,#764ba2);color:#fff;transition:all .3s ease;box-shadow:0 4px 15px #667eea66}.game-button:hover{transform:translateY(-3px);box-shadow:0 6px 20px #667eea99}.game-button:active{transform:translateY(-1px)}.instructions{margin-top:30px;padding:20px;background:#ffffff0d;border-radius:10px;font-size:.9rem;color:#ccc;line-height:1.8}.instructions p{margin:5px 0}.score-display{margin:30px 0;font-size:1.5rem}.score-display p{margin:10px 0}.score-display span{color:#feca57;font-weight:700}#hud{position:fixed;top:20px;left:20px;right:20px;display:flex;justify-content:space-between;z-index:50;pointer-events:none}#hud.hidden{display:none}.hud-left,.hud-right{display:flex;gap:10px;flex-wrap:wrap}.hud-item{background:#0009;padding:10px 20px;border-radius:25px;color:#fff;font-size:1.1rem;border:1px solid rgba(255,255,255,.2)}.hud-label{color:#aaa;margin-right:8px}#score-display{color:#feca57;font-weight:700}#kills-display{color:#ff6b6b;font-weight:700}#lives-display{letter-spacing:3px}#active-upgrades{color:#48dbfb;font-weight:700;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.weapon-indicator{font-weight:700;font-size:1rem;text-transform:uppercase;letter-spacing:1px}.weapon-indicator.hidden{display:none}.weapon-indicator.fire{background:linear-gradient(135deg,#ff6b35cc,#ff450099);border-color:#ff6b35;color:#fff;text-shadow:0 0 10px #ff6b35}.weapon-indicator.ice{background:linear-gradient(135deg,#48dbfbcc,#1e90ff99);border-color:#48dbfb;color:#fff;text-shadow:0 0 10px #48dbfb}.weapon-indicator.acid{background:linear-gradient(135deg,#2ecc71cc,#27ae6099);border-color:#2ecc71;color:#fff;text-shadow:0 0 10px #2ecc71}.weapon-indicator.electric{background:linear-gradient(135deg,#9b59b6cc,#8e44ad99);border-color:#9b59b6;color:#fff;text-shadow:0 0 10px #9b59b6}.upgrade-progress{display:flex;align-items:center;gap:10px}.progress-bar{width:100px;height:12px;background:#fff3;border-radius:6px;overflow:hidden}.progress-fill{height:100%;width:0%;background:linear-gradient(90deg,#667eea,#764ba2);border-radius:6px;transition:width .3s ease}#upgrade-screen{background:#000000e6}.upgrade-content{text-align:center;color:#fff;padding:30px;max-width:95%;width:800px;max-height:90vh;overflow-y:auto}.upgrade-title{font-size:2rem;margin-bottom:10px;color:#feca57;text-shadow:0 0 20px rgba(254,202,87,.5)}.upgrade-subtitle{color:#aaa;margin-bottom:20px}.upgrade-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:15px;max-height:60vh;overflow-y:auto;padding:10px}.upgrade-option{background:linear-gradient(135deg,#ffffff1a,#ffffff0d);border:2px solid rgba(255,255,255,.2);border-radius:15px;padding:20px;cursor:pointer;transition:all .3s ease;pointer-events:auto}.upgrade-option:hover{transform:translateY(-5px);border-color:#667eea;box-shadow:0 10px 30px #667eea4d}.upgrade-option.common{border-color:#4a5568}.upgrade-option.common:hover{border-color:#718096;box-shadow:0 10px 30px #7180964d}.upgrade-option.uncommon{border-color:#48bb78;background:linear-gradient(135deg,#48bb7826,#48bb780d)}.upgrade-option.uncommon:hover{border-color:#68d391;box-shadow:0 10px 30px #48bb784d}.upgrade-option.rare{border-color:#4299e1;background:linear-gradient(135deg,#4299e126,#4299e10d)}.upgrade-option.rare:hover{border-color:#63b3ed;box-shadow:0 10px 30px #4299e166}.upgrade-option.epic{border-color:#a855f7;background:linear-gradient(135deg,#a855f733,#a855f70d);animation:epic-glow 2s ease-in-out infinite}.upgrade-option.epic:hover{border-color:#c084fc;box-shadow:0 10px 30px #a855f780}.upgrade-option.legendary{border-color:#feca57;background:linear-gradient(135deg,#feca5740,#feca571a);animation:legendary-glow 1.5s ease-in-out infinite}.upgrade-option.legendary:hover{border-color:gold;box-shadow:0 10px 40px #feca5799}@keyframes epic-glow{0%,to{box-shadow:0 0 10px #a855f74d}50%{box-shadow:0 0 20px #a855f780}}@keyframes legendary-glow{0%,to{box-shadow:0 0 15px #feca5766}50%{box-shadow:0 0 30px #feca57b3}}.upgrade-icon{font-size:2.5rem;margin-bottom:10px}.upgrade-name{font-size:1.1rem;font-weight:700;margin-bottom:5px;color:#fff}.upgrade-desc{font-size:.85rem;color:#aaa;line-height:1.4}.upgrade-rarity{font-size:.75rem;margin-top:8px;padding:3px 8px;border-radius:10px;display:inline-block}.rarity-common{background:#4a5568;color:#fff}.rarity-uncommon{background:#48bb78;color:#fff}.rarity-rare{background:#4299e1;color:#fff}.rarity-epic{background:#a855f7;color:#fff}.rarity-legendary{background:#feca57;color:#1a1a2e}.pause-menu{display:flex;flex-direction:column;gap:15px;align-items:center;width:100%}.game-button.secondary{background:linear-gradient(45deg,#4a5568,#2d3748);box-shadow:0 4px 15px #4a556866}.game-button.secondary:hover{box-shadow:0 6px 20px #4a556899}.pause-divider{width:80%;height:1px;background:#fff3;margin:10px 0}.pause-options{width:100%;display:flex;flex-direction:column;gap:15px}.pause-option{display:flex;justify-content:space-between;align-items:center;padding:10px 20px;background:#ffffff0d;border-radius:10px}.lang-buttons{display:flex;gap:8px}.lang-btn-pause{padding:6px 14px;border:2px solid rgba(255,255,255,.2);border-radius:15px;background:#0000004d;color:#888;cursor:pointer;font-weight:700;transition:all .3s ease}.lang-btn-pause:hover{border-color:#fff6;color:#fff}.lang-btn-pause.active{border-color:#feca57;background:#feca5733;color:#feca57}.pause-hint{margin-top:15px;color:#666;font-size:.85rem}.confirm-box{max-width:400px}.confirm-title{font-size:1.5rem;margin-bottom:15px;color:#feca57}.confirm-message{color:#aaa;margin-bottom:25px;line-height:1.6}.confirm-buttons{display:flex;gap:15px;justify-content:center}.confirm-buttons .game-button{min-width:100px}@media (max-width: 600px){.game-title{font-size:2rem;letter-spacing:4px}.screen-content{padding:25px;width:95%}.game-button{padding:12px 30px;font-size:1rem}.instructions{font-size:.8rem;padding:15px}#hud{top:10px;left:10px;right:10px}.hud-item{padding:8px 15px;font-size:.9rem}}@media (max-width: 400px){.game-title{font-size:1.6rem}.score-display{font-size:1.2rem}}.cheat-panel-btn{position:fixed;bottom:20px;left:20px;width:50px;height:50px;border-radius:50%;background:#000000b3;border:2px solid rgba(255,255,255,.3);color:#fff;font-size:1.5rem;cursor:pointer;z-index:1000;transition:all .3s ease}.cheat-panel-btn:hover{background:#000000e6;border-color:#feca57;transform:scale(1.1)}.cheat-panel{position:fixed;bottom:80px;left:20px;width:280px;background:#141428f2;border:2px solid rgba(255,255,255,.2);border-radius:12px;z-index:1000;font-family:Segoe UI,sans-serif;box-shadow:0 10px 30px #00000080}.cheat-panel.hidden{display:none}.cheat-header{display:flex;justify-content:space-between;align-items:center;padding:12px 15px;background:#feca5733;border-bottom:1px solid rgba(255,255,255,.1);border-radius:10px 10px 0 0;color:#feca57;font-weight:700;font-size:.95rem}.cheat-close{background:none;border:none;color:#fff9;font-size:1.4rem;cursor:pointer;padding:0;line-height:1}.cheat-close:hover{color:#ff6b6b}.cheat-content{padding:15px;max-height:400px;overflow-y:auto}.cheat-section{margin-bottom:12px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}.cheat-section label{color:#fffc;font-size:.85rem;min-width:70px}.cheat-section select{flex:1;min-width:100px;padding:6px 8px;border-radius:6px;border:1px solid rgba(255,255,255,.2);background:#0006;color:#fff;font-size:.85rem}.cheat-section select:focus{outline:none;border-color:#feca57}.cheat-section input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:#feca57}.cheat-btn{padding:6px 12px;border:none;border-radius:6px;background:linear-gradient(45deg,#4299e1,#3182ce);color:#fff;font-size:.8rem;cursor:pointer;transition:all .2s ease;white-space:nowrap}.cheat-btn:hover{transform:translateY(-1px);box-shadow:0 3px 10px #4299e166}.cheat-btn.danger{background:linear-gradient(45deg,#e53e3e,#c53030)}.cheat-btn.danger:hover{box-shadow:0 3px 10px #e53e3e66}.cheat-btn.active{background:linear-gradient(45deg,#48bb78,#38a169)}