.presentation__header__user-name {
    /*box*/
    position: absolute;
    display: none;
    padding:5px;
    left:-10px;
    bottom:-30px;

    /*background*/
    background-color: var(--c-tertiary-4);

    /*border*/
    border:1px solid var(--c-primary-5);
    border-radius: 3px;

    /*text*/
    font-size: var(--fs-xtn);
    color:var(--c-primary-3);
    white-space: nowrap;
}

.presentation__header__user-image:hover + .presentation__header__user-name{
    /*box*/
    display:block;
}