section, h1 {
    max-width: 900px;
    margin: 0 auto;
    font-family: sans-serif;
    color: darkolivegreen;
}

body {
    padding-top: 20px;
    background-color: #e6e6e6;
}

section {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    padding: 20px;
    background-color: lightgrey;
}

section > * {
    flex: 1 1 0;
}

section img {
    max-width: 100%;
    height: auto;
    display: block;
}