@keyframes star-brightness {
    0%

{
    transform: scale(1);
    opacity: 1;
}

50% {
    transform: scale(1.2);
    opacity: 0.8;
}

100% {
    transform: scale(1);
    opacity: 1;
}

}

.star-icon {
    color: #ffcc00;
    font-size: 24px;
    animation: star-brightness 1.5s infinite;
}

    .star-icon:nth-child(1) {
        animation-delay: 0.2s;
    }

    .star-icon:nth-child(2) {
        animation-delay: 0.4s;
    }

    .star-icon:nth-child(3) {
        animation-delay: 0.6s;
    }

    .star-icon:nth-child(4) {
        animation-delay: 0.8s;
    }