body {
    background: #eee;
    font-family: 'comic sans ms'
}
#header {
    background: #ddd;
    padding-bottom: 10px;
}
#nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #ccc;
}
.thing {
    border: 1px solid black;
    border-radius: 10%;
    display: inline-block;
    padding: 10px;
}
#nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #ccc;
}