.loader {
    border: 16px solid #f3f3f3;
    border-radius: 50%;
    border-top: 16px solid #424242;
    width: 120px;
    height: 120px;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
    margin: auto;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    position: fixed;
}

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

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

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

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

.flex-align-center {
    display: flex;
    align-items: center;
}