body {
    font-family: sans-serif;
    margin: 0;
    padding: 20px;
}

div {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
}

img {
    max-width: 100%;
    width: 512px;
    height: auto;
}

button {
    margin: 15px;
    padding: 12px 24px;
    font-size: 1rem;
    cursor: pointer;
}

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

    button {
        width: 100%;
        max-width: 300px;
    }
}