* {
    font-family: Optima, sans-serif;
    color: #333;
    box-sizing: border-box;
}

body {
    margin: 0;
    background-color: #eee;
}

header {
    background-color: darkslategray;
    text-align: center;
    border-bottom: 1px solid;
}

nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.25rem 1.5rem;
    padding: 1.25rem 1rem;
}

nav > * {
    font-size: 110%;
    color: white;
}

nav > span {
    font-weight: bold;
}

nav > a {
    text-decoration: none;
}

main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 1.5rem;
    background-color: white;
}