/* Circle container - should be positioned fixed or absolute */
.animated-circles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1; /* Behind all content */
}

/* Individual circle style */
.animated-circles span {
    position: absolute;
    display: block;
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: moveCircle 25s linear infinite;
}

/* Keyframes for circle movement */
@keyframes moveCircle {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(-1000px) rotate(720deg);
        opacity: 0;
    }
}

/* Random circle positions and delays */
.animated-circles span:nth-child(1) {
    left: 10%;
    width: 60px;
    height: 60px;
    animation-delay: 0s;
}

.animated-circles span:nth-child(2) {
    left: 25%;
    width: 100px;
    height: 100px;
    animation-delay: 5s;
    animation-duration: 30s;
}

.animated-circles span:nth-child(3) {
    left: 40%;
    animation-delay: 2s;
}

.animated-circles span:nth-child(4) {
    left: 55%;
    width: 50px;
    height: 50px;
    animation-delay: 3s;
    animation-duration: 20s;
}

.animated-circles span:nth-child(5) {
    left: 70%;
    width: 120px;
    height: 120px;
    animation-delay: 1s;
    animation-duration: 35s;
}

.animated-circles span:nth-child(6) {
    left: 85%;
    width: 90px;
    height: 90px;
    animation-delay: 4s;
    animation-duration: 28s;
}