.uc-preloader {
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background: white; /* Цвет фона */
  z-index: 100005;
  transition: opacity 1.5s ease-in-out 0.35s;
}

.hide-preloader {
    opacity: 0;
    pointer-events: none;
}