* {
    font-family: roboto, arial, verdana, tahoma;
}
html {
    height: 100vh;
}
body {
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    padding: 0;
}

main img {
    min-width: 200px;
    width: 15vw;
}