.wrapper-loading,.wrapper-loading .loading-page {
    display:-webkit-box;
    display:-moz-box;
    display:-ms-flexbox;
    -js-display:flex;
    display:flex;
    -webkit-box-align:center;
    -moz-box-align:center;
    -ms-flex-align:center;
    align-items:center;
    -webkit-box-pack:center;
    -moz-box-pack:center;
    -ms-flex-pack:center;
    justify-content:center
}

.wrapper-loading {
    margin:auto;
    width:8em;
    height:8em
}

.wrapper-loading .loading-page {
    position:relative
}

.wrapper-loading .flash {
    -webkit-animation:flash 2s infinite linear;
    animation:flash 2s infinite linear
}