body {
    display: flex;
    flex-direction: column;
    margin: 0;
}
header {
    display: flex;
    flex-direction: row;
    align-items: center;
    background-color: #9abdb9;
    padding: 0 2em 0em 2em;
}
header > h1 {
    flex-grow: 1;
    text-transform: uppercase;
    letter-spacing: .3em;
}
header ul {
    display: flex;  
    list-style: none;
    gap: 1em;
}
header a {
    color: initial;
    text-decoration: none;
}
main {
    padding: 2em;
}
main img {
    max-width: 100%;
}