#flyContainer {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: visible;
    z-index: 9999;
}

.fly-item {
    position: absolute;
    width: 60px;
    height: 60px;
    background-size: contain;
    background-repeat: no-repeat;
    border-radius: 50%;
    box-shadow: 0 0 25px rgba(255,215,0,0.6);
    filter: drop-shadow(0 0 12px gold);
    animation: flyToCart 0.8s cubic-bezier(.29,.59,.37,1) forwards;
}

@keyframes flyToCart {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    70% {
        opacity: 0.9;
    }
    100% {
        transform: translate(var(--dx), var(--dy)) scale(0.1);
        opacity: 0;
    }
}