*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
}

html, body, main {
    width: 100%;
    min-height: 100vh;
    height: 100%;
}

main {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #ffffff;
}

main > img {
    width: 50vw;
    height: auto;
}