html,
body {
    margin: 0;
    width: 100%;
    min-height: 100%;
}

body {
    min-height: 100vh;
    display: grid;
    place-items: center;

    background: #111;
}

main {
    box-sizing: border-box;

    width: 100%;
    min-height: 100vh;

    padding: 2rem;

    display: grid;
    place-items: center;
}

img {
    display: block;

    width: auto;
    height: auto;

    max-width: min(94vw, 1600px);
    max-height: 92vh;

    box-shadow: 0 8px 40px rgb(0 0 0 / 45%);
}