.box-c {
    /* padding-top: 400px; */
    padding-top: 100px;
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    /* translate: 1400px; */
    translate: 1100px;
    /* transform-style: preserve-3d;
    transform: perspective(500px) rotateX(60deg); */
}

.box-c span {
    position: absolute;
    /* width: 300px;
    height: 300px; */
    border: 2px solid #8ecdf1;
    border-radius: 50%;
    transform: translateZ(-100px);
    box-shadow: 0 0 5px #8ecdf1, 
                0 0 10px #8ecdf1;
    animation: move 3s ease-in-out infinite;
}

@keyframes move{
    0% {
        transform: translateZ(-100px);
        filter: hue-rotate(0deg);
    }
    50% {
        transform: translateZ(100px);
        filter: hue-rotate(360deg);
    }
    100% {
        transform: translateZ(-100px);
        filter: hue-rotate(0deg);
    }
}

.box-c span:nth-child(1) {
    width: 20px;
    height: 20px;
    animation-delay: 0s;
}

.box-c span:nth-child(2) {
    width: 40px;
    height: 40px;
    animation-delay: 0.1s;
}

.box-c span:nth-child(3) {
    width: 60px;
    height: 60px;
    animation-delay: 0.2s;
}

.box-c span:nth-child(4) {
    width: 80px;
    height: 80px;
    animation-delay: 0.3s;
}

.box-c span:nth-child(5) {
    width: 100px;
    height: 100px;
    animation-delay: 0.4s;
}

.box-c span:nth-child(6) {
    width: 120px;
    height: 120px;
    animation-delay: 0.5s;
}

.box-c span:nth-child(7) {
    width: 140px;
    height: 140px;
    animation-delay: 0.6s;
}

.box-c span:nth-child(8) {
    width: 160px;
    height: 160px;
    animation-delay: 0.7s;
}

.box-c span:nth-child(9) {
    width: 180px;
    height: 180px;
    animation-delay: 0.8s;
}

.box-c span:nth-child(10) {
    width: 200px;
    height: 200px;
    animation-delay: 0.9s;
}

.box-c span:nth-child(11) {
    width: 220px;
    height: 220px;
    animation-delay: 1s;
}

.box-c span:nth-child(12) {
    width: 240px;
    height: 240px;
    animation-delay: 1.1s;
}

.box-c span:nth-child(13) {
    width: 260px;
    height: 260px;
    animation-delay: 1.2s;
}

.box-c span:nth-child(14) {
    width: 280px;
    height: 280px;
    animation-delay: 1.3s;
}

.box-c span:nth-child(15) {
    width: 300px;
    height: 300px;
    animation-delay: 1.4s;
}