#header {
    margin: 15px 100px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: whitesmoke;
}
#header a {
    color: white;
    text-decoration: none;
}
#headerConnexionMenuContent a:hover {
    color: black;
}
#header #headerLogo {
    font-size: 3em;
    font-weight: bold;
}
#header #headerRightPart>* {
    display: inline-block;
    margin-left: 10px;
}
#headerConnexionMenuContentForm>* {
    display: inline-block;
    margin-left: 10px;
}