.loader_os {
    border: 7px solid #f3f3f3;
    border-top: 7px solid #cc0839;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: loader_os_spin 1s linear infinite;
    display: inline-block;
    margin-right: 25px;
    vertical-align: middle;
}

@keyframes loader_os_spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.loader_os_center .loader_os {
    margin: auto !important;
}