#particles-js {
    position: fixed;
    width: 100%;
    height: 100vh;
    top: 0;
    left: 0;
    z-index: -1;
}

/* Base globale */
html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow-x: hidden;
    font-family: Arial, sans-serif;
    background: transparent;
}



.box {
    display: flex;
    justify-content: space-between;   /* éléments bien espacés */
    align-items: center;
    padding-top: 20px;
    gap: 25px;
    font-family: Arial, sans-serif;
    font-size: 14px;
    padding-bottom: 20px;
    padding-left: 40px;
    padding-right: 40px;
}

.box {
    text-decoration: none;
}
#site-header a  {
    text-decoration: none;
    text-transform: uppercase;
    transition: border-bottom 0.3s;
    padding-bottom: 5px;
    color: black;
    text-shadow:
            0 0 6px rgba(0, 0, 0, 0.25),
            0 0 12px rgba(0, 0, 0, 0.15);
}



#site-header .box a:hover {
    border-bottom: 2px solid black;
}

#site-header a {
    display: inline-block;
    text-transform: uppercase;
    margin: 0;
}

#site-header a:hover {
    border-bottom: 2px solid black;
}



#site-header .box a.active  {
    border-bottom: 2px solid black; /* lien actif souligné */
}