body {
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
    background-color: #0b0f19;
}
/* Grid background pattern mimicking radar/map coordinates */
.radar-grid {
    background-image: 
        radial-gradient(rgba(59, 130, 246, 0.12) 1.5px, transparent 1.5px),
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 50px 50px, 25px 25px, 25px 25px;
    background-position: center;
}
/* Pulse animations */
@keyframes radar-sweep {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.radar-line {
    transform-origin: bottom right;
    animation: radar-sweep 8s linear infinite;
}