body {
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

img {
    display: block;
    margin: auto;
}

h1 {
    text-align: center;
}

div {
    margin-left: 20px;
    margin-right: 20px;
}