.main-header{
    border: 1;
    padding: 0;
    margin: 0px 0px 5px 0px;
    border-color: silver;
    border-style: none none ridge none;

    /* position: fixed; */
    position: sticky;
    top: 0;
    z-index: 10;;

    display : flex; /* Flexbox*/

    flex-flow: row wrap; /* straight line, goes new row if no space */
    justify-content: flex-end; /* right aligned */
    justify-content: center;
    min-width: 100%;
    max-height: 4rem;
    background: var(--RD9);
    color: black;
    
}

.main-header-item{
    list-style: none;
    padding: 10px;
    margin: 0 3px;
    background-color: var(--RD6);
    border: 5px groove var(--RD8);
    color: black;
}