.preloader {
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    -webkit-flex-direction: column;
    flex-direction: column;
    height: 100%;
    width: 100%;
    z-index: 99;
    position: fixed;
    top: 0;
    left: 0;
    background: #fff;
    text-align: center; }
.preloader.block {
    z-index: 2;
    position: relative;
    bottom: 0;
    right: 0;
    border: 0 !important; }

.preloader-spin {
    margin: 0 auto;
    height: 35px;
    width: 35px;
    display: inline-block;
    background: transparent;
    border-radius: 50%;
    border-width: 2px;
    border-style: solid;
    border-color: #d0d0d0 #d0d0d0 #111111 #d0d0d0;
    animation: 1s linear 0s normal none infinite running spinner_preloader; }

@keyframes spinner_preloader {
    0% {
        transform: rotate(0deg); }
    50% {
        transform: rotate(360deg); }
    100% {
        transform: rotate(720deg); } }

/* Aditional style for head */
.menu ul > li > a {
    padding: 0 15px;
    font-weight: 500;
    line-height: 25px;
    color: #dddddd;
    vertical-align: top;
    cursor: pointer;
}

.button {
    font-size: 14px;
    line-height: 40px;
    padding: 0 20px;
    border: 0;
    color: #fff;
    border-radius: 0;
    font-weight: 400;
}

.bg-success {
    background-color: #28a745!important;
}

.menu ul ul {
    opacity: 0;
    visibility: hidden;
}