.loader {
    border: 5px solid #fff;
    border-top: 5px solid #000;
    border-radius: 50%;
    width: 120px;
    height: 120px;
    animation: spin 2s linear infinite;
    margin-left: auto;
    margin-right: auto;
    margin-top: 20vh;
}

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

    100% {
        transform: rotate(360deg);
    }
}