.contenedor_loader {
    background: #ffffff url('http://mottodo.com/img/preload_gif.gif') no-repeat center;
    position: fixed;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    transition: all 1.5s;
    display: flex;
    align-items: center;
    justify-content: center;

}

.loader {
    transform: rotateZ(45deg);
    perspective: 1000px;
    border-radius: 50%;
    width: 100px;
    height: 100px;
    color: #55e8fb;
  }