nav {
    position: sticky;
    top: 0;
    background: white;
    border-bottom: 1px solid #dcdcde;
    box-shadow: var(--box-shadow-medium);
    z-index: 10;
}

nav > section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    margin: auto;
    width: calc(100% - 40px);
    max-width: calc(1000px - 40px);
}

nav img {
    max-height: 40px;
    cursor: pointer;
}