body {
    display: flex;
    justify-content: center;
    align-items: center;

    height: 100vh;

    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
        "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans",
        "Helvetica Neue", sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
section {
    text-align: center;
}
img,
picture {
    max-width: 40vw;
    max-height: 40vh;
}

@media (min-width: 520px) {
    picture,
    img {
        max-width: 320px;
        max-height: 320px;
    }
}

h1 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 0;
}

@media (min-width: 520px) {
    h1 {
         font-size: 45px;
    font-weight: 900;
    }
}

div {
    border-top: 2px solid black;
    padding-top: 20px;
    margin-top: 20px;
}
a {
    color: grey;
    text-decoration: none;
}
a:hover {
    color: black;
}

code {
    font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
        monospace;
}