#preloader
{
    background: #2f757a linear-gradient(to right, #2f757a, #c1c1c1);
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease;
}
.dot
{
    width: 25px;
    height: 25px;
    margin: 0 10px;
    border: 3.5px solid #ffffff;
    border-radius: 50%;
    animation: show-hide 1s ease infinite;
}

.dot:nth-child(2)
{
    animation-delay: 300ms;
}
.dot:nth-child(3)
{
    animation-delay: 600ms;
}


@keyframes show-hide
{
    0% {
        transform: scale(0);
    }

    50% {
        transform: scale(1);
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

.preloader-hiding
{
    opacity: 0;
}
.preloader-hidden
{
    display: none!important;
}