.glimmer {
    position: fixed;
    pointer-events: none; 
    border-radius: 50%;
    opacity: 0; 
    
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8), 
                0 0 20px currentColor; 
    

    mix-blend-mode: screen; 
    
    will-change: transform, opacity;
}

@keyframes glimmer-pulse {
    0%, 100% { transform: scale(1); opacity: 0; }
    50% { transform: scale(1.1); opacity: 1; }
}