.preloader {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    /* фоновый цвет */
    background-color: #21D4FD;
    background-image: linear-gradient(19deg, #21D4FD 0%, #B721FF 100%);
    color: #eee;
    z-index: 1031;
}

.preloader__image {
    position: relative;
    top: 50%;
    left: 50%;
    width: 70px;
    height: 70px;
    margin-top: -35px;
    margin-left: -35px;
    text-align: center;
    animation: preloader-rotate 2s infinite linear;
}

@keyframes preloader-rotate {
    100% {
      transform: rotate(360deg);
    }
}

.loaded_hiding .preloader {
    transition: 0.3s opacity;
    opacity: 0;
}

.loaded .preloader {
    display: none;
}