.spinner {
    border: 20px solid #444;
    border-radius: 50%;
    border-top: 20px solid transparent;
    width: 120px;
    height: 120px;
    -webkit-animation: spin 1s linear infinite; /* Safari */
    animation: spin 1s linear infinite;
}

.spinner-container{
    display: flex;
    justify-content: center;
    margin: 5em;
    height: calc(100% - 10em);
    align-items: center;
}
/* Safari */
@-webkit-keyframes spin {
    0% { -webkit-transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); }
}

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