.spinner-container {
    display: flex;
    justify-content: center;
}

.spinner-container .spinner {
    width: 30px;
    height: 30px;
    border: 2px solid #F3F3F3;
    border-top: 2px solid #3498DB;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
}

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

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