.loader {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: block;
    margin: 0 auto 15px auto;
    position: relative;
    color: #423e41;
    box-sizing: border-box;
    animation: animloader 2s linear infinite;
}

@keyframes animloader {
    0% {
        box-shadow: 14px 0 0 -2px, 38px 0 0 -2px, -14px 0 0 -2px, -38px 0 0 -2px;
    }

    25% {
        box-shadow: 14px 0 0 -2px, 38px 0 0 -2px, -14px 0 0 -2px, -38px 0 0 2px;
    }

    50% {
        box-shadow: 14px 0 0 -2px, 38px 0 0 -2px, -14px 0 0 2px, -38px 0 0 -2px;
    }

    75% {
        box-shadow: 14px 0 0 2px, 38px 0 0 -2px, -14px 0 0 -2px, -38px 0 0 -2px;
    }

    100% {
        box-shadow: 14px 0 0 -2px, 38px 0 0 2px, -14px 0 0 -2px, -38px 0 0 -2px;
    }
}

.overlay {
    font-weight: bold;
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 1);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #423e41;
}