html,
body {
    width: 100%;
    height: 100%;
    background: rgb(2, 0, 43);
    background: linear-gradient(0deg, rgba(2, 0, 43, 1) 0%, rgba(0, 0, 120, 1) 12%, rgba(194, 230, 237, 1) 100%);
    margin:0;
}

img {
    width: 100%;
}

@media (orientation: landscape) {
    div {
        margin-left: 10%;
        margin-right: 10%;
    }
}