html,body{margin:0;height:100%;background:#0b0f14;color:#e6f1ff;font-family:system-ui, sans-serif;overflow:hidden}
#game-container{display:flex;justify-content:center;align-items:center;height:100%}
#ui{position:absolute;top:10px;left:10px;z-index:10;background:rgba(0,0,0,0.6);padding:10px 12px;border-radius:8px}
#hud{display:flex;gap:20px;margin-bottom:8px;font-weight:600}
#tower-menu button{margin:4px 2px;padding:6px 10px;border:none;border-radius:6px;background:#1e2a38;color:#e6f1ff;cursor:pointer}
#tower-menu button:hover{background:#2a3a4f}
#tower-menu button.selected{outline:2px solid #7cf}
#message{margin-top:6px;font-size:13px;color:#9fd}
canvas{background:#0f172a;border-radius:8px;box-shadow:0 0 30px #000}