body {
    margin: 0;
    padding: 0;
    background-color: #0c0c0c; 
    overflow: hidden; 
    height: 100vh;
}

.estrella {
    position: absolute;
    top: -20px;
    border-radius: 50%;
    opacity: 0.9;
    pointer-events: none;
    animation: caer linear forwards, balanceo ease-in-out infinite alternate;
}

@keyframes caer {
    to {
        transform: translateY(105vh);
    }
}

@keyframes balanceo {
    0% { margin-left: 0px; }
    100% { margin-left: 40px; } 
}