:root{--neon-cyan:#00f3ff;--neon-pink:#f0f;--bg-dark:#050505;--glass-bg:#0a0a0f99}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);color:#fff;width:100vw;height:100vh;font-family:Share Tech Mono,monospace;overflow:hidden}#game-container{width:100%;height:100%}#ui-layer{pointer-events:none;z-index:999;width:100%;height:100%;position:fixed;top:0;left:0}.hud{background:linear-gradient(#000c 0%,#0000 100%);justify-content:space-between;align-items:flex-start;width:100%;padding:20px;display:flex;position:absolute;top:0;left:0}.upgrades-panel{background:var(--glass-bg);backdrop-filter:blur(4px);border:1px solid #00f3ff4d;border-radius:4px;flex-direction:column;gap:10px;padding:15px 25px;display:flex;position:absolute;bottom:20px;right:20px}.btn-cyber{pointer-events:auto;color:var(--neon-cyan);border:1px solid var(--neon-cyan);cursor:pointer;text-shadow:0 0 5px var(--neon-cyan);background:#00f3ff1a;border-radius:4px;padding:10px 15px;font-family:Share Tech Mono,monospace;font-size:1rem;font-weight:700}.btn-cyber:hover{background:var(--neon-cyan);color:#000}.glitch-text{color:var(--neon-cyan);text-shadow:0 0 10px var(--neon-cyan);font-family:Orbitron,sans-serif;font-size:2rem;font-weight:900}.stats{background:var(--glass-bg);border:1px solid #00f3ff4d;border-radius:4px;flex-direction:column;gap:10px;padding:15px 25px;display:flex}.neon-text{color:var(--neon-pink)}.neon-text-cyan,.neon-text-blue{color:var(--neon-cyan)}.neon-text-gold{color:gold}