html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100vh;
    /* background: url(background.jpg) no-repeat 50% 50%; */
    background-size: cover;
    text-align: center;
}

#loader {
    position: fixed;
    width: 100%;
    height: 100vh;
    z-index: 10000;
    /* overflow: visible; */
    background: black url(korslinhce.png) no-repeat center center; 
    background-size: 300px;
    background-position: 50% 38%;
    opacity: 0.5;
    /* background: white url(loader2.gif) no-repeat center center; */
}

h1 {
    position: absolute;
    top: 47%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-family: poppins;
}

@media screen and (max-width: 900px) {
    #loader {
        position: fixed;
        width: 100%;
        height: 100vh;
        z-index: 10000;
        /* overflow: visible; */
        background: black url(korslinhce.png) no-repeat center center; 
        background-size: 60%;
        /* background: white url(loader2.gif) no-repeat center center; */
    }
    }