header {
    display: flex;
    flex-direction: column;
    width: 100%;
    margin: 0;
}
.header-top, .header-bottom {
    width: 100%;
    display: flex;
    align-items: center;
    height: 100px;
}
.header-top{
    width: 100%;
}
.header-logo {
    width: 70%;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}
.header-menu-mobile{
    display: none;
}

.header-logo-inist-cnrs{
    width: 70px;
    height: auto;
    margin: 0px 15px;

}
.header-logo-lalist {
    width: 280px;
    height: auto;
    margin: 0px 15px;
}
.header-btn-search{
    width: 30%;
    height: 100%;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}
.header-text{
    display: flex;
    align-items: flex-end;
    height: 5rem;
    font-size: 1rem;
}
.main-navigation{
    width: 100%;
    background-color: var(--color-primary);
    display: flex;
    justify-content: center;
}
ul.menu li.nav-main-item:hover {
    border-bottom: 5px solid var(--color-accent);
    height: stretch;
    display: flex;
    align-items: center;
}
ul.menu li.current-menu-item{
    height: stretch;
    display: flex;
    align-items: center;
    border-bottom: 5px solid var(--color-accent);
}
.menu-container{
    display: flex;
    width: 80%;
}
.menu-social__txt{
    width: 40%;
    font-weight: 600;
    align-self: center;
    text-align: end;
}
ul.menu-icons__menu-nav{
    width: 50%;
}
ul.menu, ul.menu-icons{
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-around;
}
.menu-items{
    width: 70%;
}
.menu-social{
    display: flex;
    width: 40%;
}
ul.menu-icons{
    justify-content: center;
    font-weight: 600;
}
.nav-main-item {
    padding: 10px 15px;
    font-weight: 600;
}
.nav-main-icons img {
    width: 30px;
    height: auto;
    margin: 0 10px;
}

/* Formulaire de recherche */
.menu-search {
    width: 35%;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 15px;
}
.search-form {
    width: 90%;
    padding: 0px 10px;
    border: 1.75px solid var(--color-text);
    border-radius: 50px;
}
.search-form__container, .search-form__icon {
    display: flex;
    align-items: center;
}
.search-form__icon {
    width: 20px;
    height: auto;
    margin-right: 10px;
}
.search-form__input{
    width: 100%;
    border: none;
    background-color: transparent;
    outline: none;
}
.search-form__input::placeholder{
    color: var(--color-text);
}

/** RESPONSIVE **/

@media (max-width: 600px) {
    .header-top {
        width: 100%;
        height: auto;
        justify-content: space-between;
        padding: 0 1rem;
        margin: 1rem 0 0 0;
    }
    .header-bottom{
        display: none;
    }
    .header-logo{
        width:60%;
        align-items: center;
        justify-content: flex-start;
    }
    .header-btn-search {
        width: 35%;
    }
    .header-menu-mobile {
        display: block;
        margin: 0 1rem 0 0;
    }
    .logo-hamburger-menu{
        width: 25px;
        margin: 0px 10px;
    }
    .header-logo-inist-cnrs,.header-logo-lalist {
        width: 35px;
        height: auto;
        margin: 0px 5px 0 5px;
    }
    .header-logo-lalist {
        width: 100px;
    }
    .header-logo__cnrs{
        margin-right:0.5rem ;
    }
    .header-menu-description{
        display: none;
    }
    ul.menu, ul.menu-icons{
        height: auto;
    }
    .search-bar-mobile__allArticles{
        width: 60%;
    }
}
@media (min-width: 601px) and (max-width: 800px) {
    header {
        align-items: center;
    }
    .header-top {
        width: 95%;
        height: auto;
        justify-content: space-around;
        padding: 0 1rem;
        margin: 1rem 0 0 0;
    }
    .header-bottom{
        display: none;
    }
    .header-logo{
        width:60%;
        align-items: center;
        justify-content: flex-start;
    }
    .header-btn-search {
        width: 35%;
    }
    .header-menu-mobile {
        display: block;
        margin: 0 1rem 0 0;
    }
    .logo-hamburger-menu{
        width: 40px;
        margin: 0px 10px;
    }
    .header-logo-inist-cnrs,.header-logo-lalist {
        width: 55px;
        height: auto;
        margin: 0px 10px 0 10px;
    }
    .header-logo-lalist {
        width: 110px;
    }
    .header-logo__cnrs{
        margin-right:0.5rem ;
    }
    .header-menu-description{
        display: none;
    }
    ul.menu, ul.menu-icons{
        height: auto;
    }
    .search-bar-mobile__allArticles{
        width: 60%;
    }
}
@media (min-width: 801px) and (max-width: 1230px) {
    header {
        align-items: center;
    }
    .header-top {
        width: 95%;
        height: auto;
        justify-content: space-around;
        padding: 0 1rem;
        margin: 1rem 0 0 0;
    }
    .header-bottom{
        display: none;
    }
    .header-logo{
        width:60%;
        align-items: center;
        justify-content: flex-start;
    }
    .header-btn-search {
        width: 35%;
    }
    .header-menu-mobile {
        display: block;
        margin: 0 1rem 0 0;
    }
    .logo-hamburger-menu{
        width: 40px;
        margin: 0px 10px;
    }
    .header-logo-inist-cnrs,.header-logo-lalist {
        width: 55px;
        height: auto;
        margin: 0px 10px 0 10px;
    }
    .header-logo-lalist {
        width: 150px;
    }
    .header-logo__cnrs{
        margin-right:0.5rem ;
    }
    .header-menu-description{
        display: none;
    }
    ul.menu, ul.menu-icons{
        height: auto;
    }
    .search-bar-mobile__allArticles{
        width: 60%;
    }
}
@media (min-width: 1231px) and (max-width: 1700px) {
    ul.menu {
        justify-content: space-evenly;
    }
    .menu-container {
        width: 100%;
        justify-content: center;
    }
    .menu-items {
        width: 50%;
    }
    .menu-social__menu-nav{
        width: 25%;
    }
    .menu-search {
        width: 20%;
        justify-content: center;
    }
    .search-form__menu {
        width: 100%;
    }
    .menu-social__mobile-single{
    width: 70%;
    }
    .header-top {
        margin: 1rem 0 0 0;
    }
}

 @media (min-width: 1701px){
    .menu-social__menu-nav{
        width: 25%;
    }
}