.firework {
    position: absolute;
    width: 12px;
    height: 12px;
    background: transparent;
    pointer-events: none;
    animation: fadeOut 1.2s forwards;
    z-index: 1000;
}

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    border-radius: 65%;
    background: red;
    animation: explode 2s ease-out forwards;
}

@keyframes explode {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    33% {
        opacity: 0.75;
    }
    66% {
        transform: translate(var(--dx), var(--dy)) scale(0.8);
        opacity: 0.33;
    }
    100% {
        transform: translate(var(--dx), var(--dy)) scale(0.5);
        opacity: 0;
    }
}

@keyframes fadeOut {
    to {
        opacity: 0;
    }
}