.preloader {
    align-items: center;
    background: rgb(23, 22, 22);
    display: flex;
    height: 100vh;
    justify-content: center;
    left: 0;
    position: fixed;
    top: 0;
    transition: opacity 0.3s linear;
    width: 100%;
    z-index: 9999;
}