:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;overflow:hidden;background-color:#1a1a1a;color:#fff}#app{position:absolute;top:0;left:0;width:100%;height:100%}.overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#000000d9;display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:100;overflow-y:auto;padding:20px 0}.hidden{display:none!important}.form-group{margin:6px 0}input,select,button{padding:8px;font-size:15px;margin:4px;border-radius:5px;border:none}button{background-color:#4caf50;color:#fff;cursor:pointer;transition:background .3s}button:hover{background-color:#45a049}.hud{position:absolute;top:20px;right:20px;z-index:50}.upgrade-notification{position:absolute;top:40%;left:50%;transform:translate(-50%,-50%);background:#000000d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:2px solid #4CAF50;color:#fff;padding:24px 40px;border-radius:16px;text-align:center;z-index:200;box-shadow:0 0 30px #4caf504d,inset 0 0 15px #4caf5033;min-width:300px;transition:all .5s cubic-bezier(.175,.885,.32,1.275);animation:slideUpIn .5s ease-out}.upgrade-notification.fade-out{opacity:0;transform:translate(-50%,-70%) scale(.9)}.upgrade-notification h3{margin:0 0 10px;color:#4caf50;font-size:24px;text-transform:uppercase;letter-spacing:2px;text-shadow:0 0 10px rgba(76,175,80,.5)}.upgrade-level{display:inline-block;background:#4caf50;color:#000;padding:4px 12px;border-radius:20px;font-weight:700;font-size:14px;margin-bottom:15px;box-shadow:0 0 10px #4caf5066}.upgrade-name{font-size:20px;font-weight:700;margin:5px 0;color:#fff}.upgrade-desc{font-size:14px;color:#aaa;margin-top:8px;font-style:italic}.upgrade-notification.max-level{border-color:gold;box-shadow:0 0 30px #ffd7004d}.upgrade-notification.max-level h3{color:gold}@keyframes slideUpIn{0%{opacity:0;transform:translate(-50%,-30%) scale(.8)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}.audio-controls{margin:8px 0;padding:10px;background:#ffffff0d;border-radius:8px;min-width:350px}.audio-controls h3{margin:0 0 8px;font-size:16px;color:#4caf50}.control-group{display:flex;align-items:center;justify-content:center;gap:8px;margin:5px 0}.control-group label{min-width:100px;text-align:right;font-size:13px}.control-group input[type=range]{width:120px;height:6px;border-radius:3px;background:#fff3;outline:none;-webkit-appearance:none;-moz-appearance:none;appearance:none}.control-group input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:#4caf50;cursor:pointer;transition:background .2s}.control-group input[type=range]::-webkit-slider-thumb:hover{background:#45a049}.control-group input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#4caf50;cursor:pointer;border:none;transition:background .2s}.control-group input[type=range]::-moz-range-thumb:hover{background:#45a049}.control-group span{min-width:40px;text-align:left;font-size:13px;color:#fff}.volume-btn{width:30px;height:30px;padding:0;font-size:18px;font-weight:700;background-color:#555;margin:0}.volume-btn:hover{background-color:#666}.mute-btn{min-width:100px;font-size:14px;background-color:#2196f3}.mute-btn:hover{background-color:#1976d2}.mute-btn.muted{background-color:#f44336}.mute-btn.muted:hover{background-color:#d32f2f}.game-logo{max-width:280px;width:100%;height:auto;margin-bottom:8px;filter:drop-shadow(0 0 10px rgba(0,212,255,.5));animation:logoFloat 3s ease-in-out infinite}@keyframes logoFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.help-text{background:#4caf501a;border:2px solid rgba(76,175,80,.3);border-radius:8px;padding:8px 18px;margin:8px 0;max-width:420px;text-align:left}.help-text p{margin:5px 0;font-size:13px;line-height:1.4;color:#e0e0e0}.help-text strong{color:#4caf50;font-size:13px}.save-msg{color:gold;font-weight:700;margin:10px 0;font-size:1.2rem;text-shadow:0 0 10px rgba(255,215,0,.5)}.stage-info{font-size:1.1rem;color:#2196f3;margin-bottom:5px}.final-score{font-size:2rem;font-weight:700;color:#fff;margin:10px 0}.game-over-buttons{display:flex;gap:15px;margin-top:20px}.copyright-notice{position:fixed;bottom:20px;right:20px;font-size:14px;color:#ffffff80;pointer-events:none;z-index:110}.debug-btn{background-color:#616161!important;font-size:14px!important;margin-bottom:20px!important;border:1px solid #9e9e9e!important}.debug-btn:hover{background-color:#757575!important}.version-btn{position:fixed;bottom:20px;left:20px;background:#ffffff1a;color:#888;font-size:12px;padding:6px 12px;border-radius:4px;border:1px solid rgba(255,255,255,.2);cursor:pointer;transition:all .2s;z-index:110}.version-btn:hover{background:#fff3;color:#fff;border-color:#fff6}.modal-content{background:#2a2a2a;padding:30px;border-radius:10px;max-width:600px;width:90%;max-height:80vh;overflow-y:auto;box-shadow:0 0 20px #00000080;border:1px solid #444}.changelog-list{text-align:left;margin:20px 0;font-family:Courier New,Courier,monospace;font-size:14px;line-height:1.6}.changelog-item{margin-bottom:8px;border-bottom:1px solid #333;padding-bottom:4px}.changelog-item .commit-hash{color:#4caf50;margin-right:10px}.debug-options{display:flex;flex-direction:column;gap:15px;margin:20px 0;width:300px}.debug-option{display:flex;align-items:center;justify-content:space-between;background:#ffffff0d;padding:12px 18px;border-radius:8px;font-size:14px}.debug-option button{width:100%;margin:0;background-color:#ff9800}.debug-option button:hover{background-color:#f57c00}.switch{position:relative;display:inline-flex;align-items:center;gap:12px;cursor:pointer;width:100%}.switch input{opacity:0;width:0;height:0}.slider{position:relative;width:40px;height:20px;background-color:#444;transition:.4s;border-radius:20px;flex-shrink:0}.slider:before{position:absolute;content:"";height:14px;width:14px;left:3px;bottom:3px;background-color:#fff;transition:.4s;border-radius:50%}input:checked+.slider{background-color:#4caf50}input:checked+.slider:before{transform:translate(20px)}#debug-close-btn{background-color:#555;margin-top:20px;min-width:120px}