#heart-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 9999;
}
.heart {
    position: absolute;
    font-size: 24px;
    color: red;
    opacity: 0.9;
    animation: floatUp 3s ease-out forwards, popFade 0.3s ease-out 2.7s forwards;
    will-change: transform, opacity;
}
@keyframes floatUp {
    0% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    80% {
        transform: translateY(-200px) scale(1.1);
    }
    100% {
        transform: translateY(-220px) scale(0);
    }
}
@keyframes popFade {
    0% { opacity: 1; }
    100% { opacity: 0; transform: scale(1.5); }
}