body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem;
}

main img {
    width: 100%;
    max-width: 400px;
    height: auto;
}

@media (max-width: 600px) {
    main img {
        max-width: 90vw;
    }
}