:root{--bg-color: #050510;--neon-green: #0f0;--neon-red: #f00;--neon-blue: #0ff;--neon-purple: #aa00ff;--neon-gold: #ffd700;--neon-sky: #00aaff;--neon-magenta: #e0e;--neon-white: #fff;--scanline-color: rgba(0, 0, 0, .5)}@font-face{font-family:Retro;src:local("Courier New"),monospace}body{margin:0;padding:0;background-color:var(--bg-color);color:var(--neon-green);font-family:Retro,monospace;overflow:hidden;display:flex;justify-content:center;align-items:center;height:100vh}#game-outer-wrapper{position:absolute;top:0;left:0;width:100%;height:100%;background-color:var(--bg-color);z-index:10;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px}#game-container{position:relative;border:4px solid var(--neon-green);box-shadow:0 0 20px var(--neon-green);background-color:#000}canvas{display:block;image-rendering:pixelated;background-color:#000}.hud-panel{background:#001400cc;border:2px solid var(--neon-green);padding:10px;pointer-events:auto}#scanlines{position:fixed;top:0;left:0;width:100vw;height:100vh;z-index:20000;pointer-events:none;background:linear-gradient(#12101000 50%,#00000040 50%),linear-gradient(90deg,#ff00000f,#00ff0005,#0000ff0f);background-size:100% 4px,3px 100%;animation:scanlineMove .3s linear infinite;box-shadow:inset 0 0 150px #000000e6}@keyframes scanlineMove{0%{transform:translateY(0)}to{transform:translateY(4px)}}#scanlines:before{content:" ";display:block;position:absolute;inset:0;background:transparent;box-shadow:inset 0 0 50px #00000080;z-index:2;pointer-events:none}@keyframes flicker{0%{opacity:.97}5%,10%{opacity:.99}15%{opacity:.95}20%{opacity:.98}30%{opacity:.96}45%{opacity:.94}60%{opacity:.98}to{opacity:.96}}body{animation:flicker .1s infinite}#bottom-bar{display:flex;justify-content:space-between;align-items:center;padding:10px 20px;gap:20px;background:#000a00e6}.tower-card{display:flex;align-items:center;gap:10px;border:1px solid #333;padding:5px 15px;cursor:pointer;transition:all .2s;background:#00000080;flex:1}.tower-card:hover{border-color:var(--neon-green);background:#00ff001a;box-shadow:0 0 10px var(--neon-green)}#upgrade-menu{background:#001400f2;border:2px solid var(--neon-green);box-shadow:0 0 15px var(--neon-green);padding:15px;min-width:200px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}#upgrade-info{font-family:Courier New,Courier,monospace;font-size:16px;color:#fff;line-height:1.4;margin-bottom:12px;text-shadow:1px 1px 0 #000}#upgrade-menu button{width:100%;margin-top:5px;padding:8px;font-family:Courier New,monospace;font-weight:700;cursor:pointer;background:#000;border-width:2px;border-style:solid;text-transform:uppercase;transition:all .1s}#upgrade-menu button:hover{transform:scale(1.05);box-shadow:0 0 10px currentColor}#upgrade-menu button:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.tower-card.selected{border-color:#fff;background:#fff3}.tower-icon{font-size:24px;font-weight:700}.tower-info{display:flex;flex-direction:column}.tower-name{font-size:14px;color:#fff}.tower-cost{font-size:12px;color:#aaa}.action-btn{border:2px solid var(--neon-blue);color:var(--neon-blue);background:transparent;padding:10px 20px;font-size:16px;font-weight:700;cursor:pointer;min-width:160px;text-align:center;transition:all .2s;text-transform:uppercase;font-family:Retro,monospace}.action-btn:hover:not(:disabled){background:var(--neon-blue);color:#000;box-shadow:0 0 15px var(--neon-blue)}.action-btn:disabled{opacity:.5;cursor:not-allowed;border-color:#444;color:#444}.module-card{transition:all .2s;background:#00000080}.module-card:hover{border-color:#fff!important;background:#ffffff1a!important}.module-card.selected{border-color:var(--neon-green)!important;box-shadow:0 0 15px var(--neon-green);color:#fff!important}#btn-boot:not(:disabled){border-color:var(--neon-green)!important;color:var(--neon-green)!important;cursor:pointer!important;box-shadow:0 0 20px var(--neon-green)}#btn-boot:hover:not(:disabled){background:var(--neon-green)!important;color:#000!important}.patch-card{display:flex;flex-direction:column;justify-content:space-between;align-items:flex-start;background:#000c;border:1px solid #333;padding:20px;width:200px;height:250px;cursor:pointer;transition:all .2s;box-shadow:0 0 10px #00000080}.patch-card:hover{border-color:var(--neon-blue);background:#00323c80;box-shadow:0 0 20px var(--neon-blue);transform:translateY(-5px)}.patch-name{font-size:20px;color:var(--neon-blue);margin-bottom:10px;text-shadow:0 0 5px var(--neon-blue);font-weight:700}.patch-desc{font-size:14px;color:#ddd;line-height:1.4;flex-grow:1}.patch-click{font-size:12px;color:#666;margin-top:10px;text-transform:uppercase}.patch-card:hover .patch-click{color:var(--neon-green)}