.loader{
    width: 90px;
    height: 90px;
    border: 16px solid rgba(255, 255, 255, 0.61);
    border-top: 16px solid #e70e15;
    border-radius: 50%;
    animation: spin 2s linear infinite;
    display: flex;
   margin-left: auto;
   margin-right: auto;
}

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