body {
    font-family: "Segoe UI", sans-serif !important;
    background-repeat: repeat;
    background-size: 40px 40px;
    min-height: 100vh;
    transition: background 0.5s ease-in-out;
    overflow-x: hidden;
    animation: movePattern 30s linear infinite;
}
@keyframes movePattern {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 40px 40px;
    }
}
#particles-js::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.15); /* capa de oscurecimiento */
    top: 0;
    left: 0;
    z-index: 0;
}