html,
body {
    padding: 0;
    margin: 0;
    background-color: #00aaff;
    overflow: hidden;
}

main {
    width: 100vw;
    height: 100dvh;
    background-image: url("../img/others/nipoyi.png");
    background-repeat: no-repeat;
    background-position: center center;
}