body {
    background-color: skyblue;
}

body > header {
    width: 100%;
    position: fixed;
    height: 40px;
    top: 0;
    left: 0;
    background-color: rgb(33, 33, 33);
    display: flex;
    flex-direction: row;
}

#user_section {
    justify-content: flex-end;
    color: white;
}