html, body, 
.layout-wrapper {
    height: 100vh;
    margin: 0;
    padding: 0;
    font-size: 14px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

.hide {
    display: none;
}

.loading-wrapper {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    background-color: #fff;
}
    .loading-wrapper > div {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
        .loading-wrapper > div:last-child > div {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            align-items: center;
            line-height: 2;
        }
            .loading-wrapper > div:last-child > div:first-child {
                justify-content: center;
            }

    .loading-wrapper .slogan {
        color: #1565C0;
        text-shadow: 1px 1px 1px #eee;
        letter-spacing: 2px;
        font-size: 16px;
        padding: 0 0 0 13px;
    }
    .loading-wrapper .copyright {
        color: #cfcfcf;
        margin: 0 0 20px;
        text-shadow: 1px 1px 1px #fff;
    }
    
    .loading-wrapper .site-logo {
        letter-spacing: 5px;
        font-size: 42px;
        font-weight: bold;
        text-align: center;
    }
        .loading-wrapper .site-logo img {
            max-height: 110px;
            max-width: 250px;
            margin: 0 25px;
        }
        .loading-wrapper .site-logo .title {
            color: #fff;
            text-shadow: 2px 2px 5px #1A237E;
            white-space: nowrap;
        }

    .loading-wrapper .loader {
        width: 8vmax;
        height: 8vmax;
        border-right: 4px solid #039BE5;
        border-radius: 100%;
        animation: spinRight 1500ms linear infinite;
        
        &:before, &:after {
        content: '';
        width: 6vmax;
        height: 6vmax;
        display: block;
        position: absolute;
        top: calc(50% - 3vmax);
        left: calc(50% - 3vmax);
        border-left: 3px solid #4FC3F7;
        border-radius: 100%;
        animation: spinLeft 1200ms linear infinite;
        }
        
        &:after {
        width: 4vmax;
        height: 4vmax;
        top: calc(50% - 2vmax);
        left: calc(50% - 2vmax);
        border: 0;
        border-right: 2px solid #B3E5FC;
        animation: none;
        }
    }
    
    @keyframes spinLeft {
        from {transform:rotate(0deg);}
        to {transform:rotate(720deg);}
    }
    
    @keyframes spinRight {
        from {transform:rotate(360deg);}
        to {transform:rotate(0deg);}
    }