.loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: #000;
    opacity: 0.25;
    z-index: 100;
    transition: opacity 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
}

.loader-wrapper .loader {
    height: 240px;
    width: 240px;
}