.circles-container {
    width: 100%;
    height: 100%;
    position: absolute;
    overflow: hidden;
    left: 0 ;
    top: 0 ;
    
}

.circle{
    position: absolute;
    display: block;
    list-style: none;
    width: 20px ;
    height: 20px ;
    background-color: rgba(255, 255, 255, 0.5);
    animation: floating 25s linear infinite ;
    bottom: -150px;

}

.circle:first-child {
        left: 25%;
        width: 80px;
        height: 80px;
        animation-delay: 0;

}
.circle:nth-child(2) {
    left: 10% ;
    width: 50px;
    height: 50px;
    animation-duration: 16s ;
    animation-delay: 3s ;

}

.circle:nth-child(3) {
    left: 70% ;
    width: 55px;
    height: 55px;
    animation-delay: 4s ;

}

.circle:nth-child(4) {
    left: 50% ;
    width: 40px;
    height: 40px;
    animation-duration: 18s ;
    animation-delay: 6s ;

}

.circle:nth-child(5) {
    left: 50% ;
    width: 70px;
    height: 70px;
    animation-duration: 12s ;
    animation-delay: 2s ;

}

.circle:nth-child(6) {
    left: 75% ;
    width: 110px;
    height: 110px;
    animation-duration: 20s ;
    animation-delay: 0s ;

}

.circle:nth-child(7) {
    left: 60% ;
    width: 35px;
    height: 35px;
    animation-duration: 28s ;
    animation-delay: 4s ;

}

.circle:nth-child(8) {
    left: 33% ;
    width: 150px;
    height: 150px;
    animation-duration: 23s ;
    animation-delay: 6s ;

}

.circle:nth-child(9) {
    left: 80% ;
    width: 45px;
    height: 45px;
    animation-duration: 20s ;
    animation-delay: 7s ;
}

.circle:nth-child(10) {
    left: 90% ;
    width: 40px;
    height: 40px;
    animation-delay: 3s ;
    animation-duration: 19s ;

}



@keyframes floating {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
        border-radius: 0;
    }

    100% {
        transform: translateY(-1000px) rotate(720deg);
        opacity: 0;
        border-radius: 50%;
    }

}