.preloader {
    position: fixed;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    background: #11151a;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
    z-index: 9999;
}

.preloader.hide {
    opacity: 0;
    visibility: hidden;
}

.loader {
    border: 6px solid #f3f3f3;
    border-top: 6px solid #7C40FF;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}