*{margin:0;padding:0;box-sizing:border-box}body{background:#000;display:flex;justify-content:center;align-items:center;min-height:100vh;font-family:Courier New,Courier,monospace;overflow:hidden}#game-wrapper{position:relative;width:100vw;height:100vh;display:flex;justify-content:center;align-items:center}#gameCanvas{display:block;background:#000;image-rendering:pixelated}#hud{position:absolute;top:0;left:0;width:100%;display:flex;justify-content:space-between;align-items:flex-start;padding:10px 20px;background:linear-gradient(to bottom,rgba(0,0,0,.75) 0%,transparent 100%);pointer-events:none;z-index:10}.hud-label{display:block;font-size:9px;letter-spacing:2px;color:#64c8ff80;margin-bottom:3px}#hud-lives,#hud-score,#hud-center,#hud-level{text-align:center;min-width:70px}#lives-icons{display:flex;gap:5px;align-items:center;justify-content:center}.life-icon{width:20px;height:14px;background:#00dcffd9;clip-path:polygon(0 50%,20% 0,80% 0,100% 50%,80% 100%,20% 100%);display:inline-block}.life-icon.lost{background:#ff3c3c40}#score-value,#level-value,#wave-display{font-size:22px;font-weight:700;color:#00dcff;text-shadow:0 0 8px rgba(0,220,255,.5)}#attack-slots{position:absolute;bottom:14px;left:16px;pointer-events:none;z-index:10}#slots-row{display:flex;gap:6px;margin-top:4px}.attack-slot{width:40px;height:40px;border:1px solid rgba(0,220,255,.25);border-radius:3px;background:#000a1eb3;display:flex;align-items:center;justify-content:center;font-size:9px;font-weight:700;color:#64c8ff66;letter-spacing:0;transition:border-color .2s,color .2s;position:relative;overflow:hidden}.attack-slot.active{border-color:#00dcffb3;color:#0fe;text-shadow:0 0 8px rgba(0,255,238,.8);background:#00283cd9}.attack-slot:before{content:attr(data-n);position:absolute;top:2px;left:4px;font-size:7px;color:#00b4dc66}#combo-display{position:absolute;top:60px;left:50%;transform:translate(-50%);font-size:15px;font-weight:700;letter-spacing:3px;color:#fd0;text-shadow:0 0 10px rgba(255,220,0,.9);pointer-events:none;z-index:10;opacity:0;transition:opacity .3s}#combo-display.visible{opacity:1}#power-indicator{position:absolute;bottom:62px;left:50%;transform:translate(-50%);color:#fd0;font-size:12px;letter-spacing:2px;text-shadow:0 0 8px rgba(255,220,0,.8);pointer-events:none;z-index:10;opacity:0;transition:opacity .4s;white-space:nowrap}#power-indicator.visible{opacity:1}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#000014d1;display:flex;justify-content:center;align-items:center;z-index:20;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.overlay.hidden{display:none}.overlay-box{text-align:center;padding:36px 48px;border:1px solid rgba(0,220,255,.25);background:#000a1eeb;border-radius:4px;max-width:460px;width:92%}.overlay-box h1{font-size:40px;color:#00dcff;letter-spacing:6px;text-shadow:0 0 18px rgba(0,220,255,.7);margin-bottom:14px}.overlay-box h2{font-size:28px;color:#00dcff;letter-spacing:4px;text-shadow:0 0 14px rgba(0,220,255,.6);margin-bottom:6px}.overlay-box p{color:#c8e6ffbf;font-size:13px;margin-bottom:10px;line-height:1.6}.controls-info{margin:16px 0 12px;padding:14px;border:1px solid rgba(0,220,255,.1);border-radius:3px;background:#00dcff08}.controls-info p{margin-bottom:5px;font-size:12px;color:#96d2ff99}.legend{margin:12px 0 14px;text-align:left}.legend-row{display:flex;align-items:center;gap:10px;font-size:11px;color:#b4d2ff99;margin-bottom:5px}.tag{font-size:10px;font-weight:700;padding:1px 5px;border-radius:2px;min-width:28px;text-align:center}.tag.patrol{color:#b4dcffb3;border:1px solid rgba(100,160,255,.3)}.tag.aggressive{color:#f85;border:1px solid rgba(255,100,50,.4)}.tag.flee{color:#8fa;border:1px solid rgba(80,255,120,.3)}.tag.ram{color:#fd0;border:1px solid rgba(255,220,0,.4)}button{margin-top:14px;padding:11px 34px;font-family:Courier New,monospace;font-size:14px;letter-spacing:3px;background:transparent;color:#00dcff;border:1px solid #00dcff;border-radius:3px;cursor:pointer;transition:background .2s,box-shadow .2s}button:hover{background:#00dcff1a;box-shadow:0 0 14px #00dcff4d}button:active{transform:scale(.97)}.boss-alert{border-color:#ff3c3c66;animation:bossPulse .6s ease-in-out infinite alternate}.boss-alert h2{color:#f44;text-shadow:0 0 18px rgba(255,60,60,.9)}@keyframes bossPulse{0%{box-shadow:0 0 20px #ff3c3c40}to{box-shadow:0 0 50px #ff3c3ca6}}.wave-overlay{background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none;pointer-events:none}.wave-announce{text-align:center;animation:waveSlide 1.7s ease-out forwards}.wave-announce p{font-size:32px;font-weight:700;letter-spacing:5px;color:#00dcff;text-shadow:0 0 24px rgba(0,220,255,.9);line-height:1.3}.wave-pattern{font-size:14px;letter-spacing:4px;color:#b4e6ffb3}@keyframes waveSlide{0%{opacity:0;transform:translateY(-20px)}20%{opacity:1;transform:translateY(0)}70%{opacity:1}to{opacity:0}}.upgrade-box{max-width:680px;padding:32px 36px}.upgrade-sub{font-size:11px;color:#78b4dc80;letter-spacing:2px;margin-bottom:20px!important}#upgrade-cards{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:4px}.upgrade-card{width:170px;padding:18px 14px;border:1px solid rgba(0,220,255,.2);border-radius:4px;background:#001428d9;cursor:pointer;transition:border-color .2s,background .2s,transform .15s;text-align:center}.upgrade-card:hover{border-color:#00dcffb3;background:#002846f2;transform:translateY(-3px);box-shadow:0 0 18px #00dcff40}.upgrade-card:active{transform:scale(.97)}.upgrade-card .card-icon{font-size:26px;margin-bottom:10px;display:block}.upgrade-card .card-title{font-size:11px;font-weight:700;letter-spacing:2px;color:#00dcff;margin-bottom:6px}.upgrade-card .card-desc{font-size:10px;color:#a0d2ff99;line-height:1.5}.upgrade-card.attack-card{border-color:#ffaa004d}.upgrade-card.attack-card:hover{border-color:#fa0c;box-shadow:0 0 18px #ffaa0040}.upgrade-card.attack-card .card-title{color:#fa0}#game-wrapper.invulnerable:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;border:3px solid rgba(0,255,150,.5);animation:invFlash .3s linear infinite alternate;z-index:5}@keyframes invFlash{0%{opacity:1}to{opacity:0}}#btn-exit{position:fixed;top:14px;right:14px;z-index:40;margin-top:0}.overlay-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:10px}