.loader {
    position: fixed;
    border: 16px solid #f3f3f3; /* Light grey */
    border-top: 16px solid black; /* Blue */
    border-radius: 50%;
    left: 50%;
    top: 50%;
    margin-top: -162px;
    margin-left: -162px;
    width: 300px;
    height: 300px;
    animation: spin 2s linear infinite;
}
.logo {
    position: fixed;
    left: 50%;
    top: 50%;
    margin-top: -100px;
    margin-left: -100px;
    width: 200px;
    height: 200px;
    background-color: black;
    -webkit-mask: url(iwa_logo.svg) no-repeat center;
    mask: url(iwa_logo.svg) no-repeat center;
}

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