fronend/scss/_pageloader.scss

.page-loader-wrapper {
    z-index: 99999999;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: #eee;
    overflow: hidden;
    text-align: center;

    p {
        font-size: 13px;
        margin-top: 10px;
        font-weight: bold;
        color: #444;
    }

    .loader {
        position: relative;
        top: calc(50% - 30px);
    }
}