/*для формы что */
/* салют */

.firework {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    opacity: 1;
    transform: translate(-50%, -50%);
    display: none;
    z-index: 10000;
}

.firework::before, .firework::after, .firework div {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, yellow, transparent);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    animation: none;
    /*animation: firework-particles 3s forwards;*/
}

/* Добавляем больше "частиц" */
.firework div:nth-child(1) { transform: translate(-50%, -50%) rotate(0deg) translate(80px); }
.firework div:nth-child(2) { transform: translate(-50%, -50%) rotate(45deg) translate(80px); }
.firework div:nth-child(3) { transform: translate(-50%, -50%) rotate(90deg) translate(80px); }
.firework div:nth-child(4) { transform: translate(-50%, -50%) rotate(135deg) translate(80px); }
.firework div:nth-child(5) { transform: translate(-50%, -50%) rotate(180deg) translate(80px); }
.firework div:nth-child(6) { transform: translate(-50%, -50%) rotate(225deg) translate(80px); }
.firework div:nth-child(7) { transform: translate(-50%, -50%) rotate(270deg) translate(80px); }
.firework div:nth-child(8) { transform: translate(-50%, -50%) rotate(315deg) translate(80px); }

@keyframes firework-particles {
    0% {
        opacity: 1;
        transform: scale(0);
    }
    /*50% {*/
    /*    opacity: 0.2;*/
    /*    transform: scale(0.5);*/
    /*}*/
    100% {
        opacity: 0;
        transform: scale(1);
    }
}