.preloader[hidden],
.preloader[hidden] * {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader {
    transition: opacity 0.3s ease 0s;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(204, 204, 204, 0.5);
    z-index: 999;
}

.preloader__circle {
    transition: opacity 0.3s ease 0s;
    height: 50px;
    width: 50px;
    border-left: 3px solid #005591;
    border-bottom: 3px solid #005591;
    border-right: 3px solid #005591;
    border-top: 3px solid transparent;
    border-radius: 50%;
    animation: spinner 1s linear infinite;
}

@keyframes spinner {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}