main {
    display: grid;
    grid-template-columns: 100vw;
    grid-template-rows: 100vh;
}

div {
    display: grid;
    justify-content: center;
    align-content: center;
}

body {
    margin: 0;
    overflow: hidden;
}

h1 {
    padding: 0;
    margin: 0;
}