* {
    margin:0;
    padding:0;
}

body {
    background-color: gray;
    width: 100dvw;
    height: 100dvh;
    overflow: hidden;
    overscroll-behavior: none;
    touch-action: none;
}

#main {
    height: 70%;
    width: 90%;
    margin: 15% 5%;
}