.overlay { background: rgba(6,8,18,0.82) !important; }
main { flex:1; position:relative; z-index:1; display:flex; flex-direction:column; align-items:center; padding:20px 16px 30px; }
#gameCanvas { background:#1a1d28; border-radius:6px; width:100%; height:auto; max-width:850px; }
.canvas-wrap { max-width: 850px; width: 100%; }