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#44aaff4d,inset 0 0 30px #44aaff1a;color:#fff;transform:translateY(-2px)}.menu-controls{display:flex;gap:1.5rem;flex-wrap:wrap;justify-content:center;font-size:.8rem;color:#96b4dc80}.menu-controls div{display:flex;align-items:center;gap:.4rem}kbd{display:inline-block;padding:.15rem .5rem;border:1px solid rgba(100,140,200,.3);border-radius:3px;background:#648cc814;font-family:inherit;font-size:.75rem;color:#aac8ffb3}.hud{position:absolute;top:0;right:0;bottom:0;left:0;z-index:5;pointer-events:none;padding:1rem 1.5rem}.hud-top-left{position:absolute;top:1rem;left:1.5rem;display:flex;flex-direction:column;gap:.4rem}.hud-bar-group{display:flex;align-items:center;gap:.5rem}.hud-bar-label{font-size:.7rem;font-weight:700;letter-spacing:.1em;color:#c8dcff99;width:22px}.hud-bar{width:180px;height:14px;background:#00000080;border:1px solid rgba(100,150,220,.2);border-radius:2px;position:relative;overflow:hidden}.hud-bar-fill{height:100%;transition:width .15s 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rgba(255,200,50,.4);letter-spacing:.05em}.hud-score-label{font-size:.65rem;font-weight:600;letter-spacing:.15em;color:#ffc86480}.upgrade-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:20;display:flex;align-items:center;justify-content:center;background:#040610d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);animation:fade-in .3s ease}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.upgrade-content{text-align:center;max-width:800px;padding:2rem}.upgrade-header{margin-bottom:2rem}.upgrade-wave-clear{font-size:.8rem;font-weight:700;letter-spacing:.25em;color:#64c864b3;margin-bottom:.5rem}.upgrade-title{font-size:clamp(1.5rem,4vw,2.5rem);font-weight:800;background:linear-gradient(180deg,#fff,#8af);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.upgrade-cards{display:flex;gap:1.2rem;justify-content:center;flex-wrap:wrap;margin-bottom:2rem}.upgrade-card{width:200px;padding:1.5rem 1rem;border:1px solid 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rgba(255,200,50,.3)}.gameover-stat-label{font-size:.75rem;font-weight:600;letter-spacing:.15em;color:#c8d2e680;text-transform:uppercase}.gameover-restart-btn{font-size:1.1rem;font-weight:700;letter-spacing:.2em;padding:.9rem 2.5rem;border:2px solid rgba(68,170,255,.4);border-radius:4px;background:#44aaff14;color:#8be;cursor:pointer;transition:all .3s ease;text-transform:uppercase;font-family:inherit}.gameover-restart-btn:hover{background:#4af3;border-color:#44aaffb3;box-shadow:0 0 25px #44aaff40;color:#fff;transform:translateY(-2px)}