/* Header */
.bandeau {
    background: rgba(40, 85, 134, 0.85); /* Glassmorphism léger */
    backdrop-filter: blur(5px);
    color: var(--couleur-texte-bandeau);
    padding: 1rem 2rem;
    box-shadow: var(--ombre-boite);
    width: 100%;
    display: flex;
    justify-content: center;
    box-sizing: border-box;
    overflow-x: hidden;
}

.contenu-bandeau {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
}

/* Logo / Titre avec animation lune */
.titre-site a {
    font-family: var(--police-titre);
    font-size: var(--taille-titre-principal);
    color: var(--couleur-texte-bandeau);
    text-decoration: none;
    font-weight: bold;
    display: flex;
    align-items: center;
}

.lune {
    display: inline-block;
    margin-right: 0.5rem;
    animation: lune-balance 4s infinite alternate ease-in-out;
}

@keyframes lune-balance {
    0% { transform: rotate(0deg); }
    50% { transform: rotate(15deg); }
    100% { transform: rotate(-10deg); }
}

/* Menu principal */
.menu {
    display: flex;
    gap: 2rem;
}

.menu a {
    color: var(--couleur-texte-bandeau);
    text-decoration: none;
    font-family: var(--police-principale);
    font-size: var(--taille-texte);
    position: relative;
    transition: all 0.3s ease;
}

.menu a::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0%;
    height: 2px;
    background: var(--couleur-bouton-hover);
    transition: width 0.3s ease;
}

.menu a:hover::after {
    width: 60%;
}

/* Bouton utilisateur */
.btn-user {
    background: var(--couleur-bouton-fond);
    color: var(--couleur-bouton);
    padding: 0.5rem 1rem;
    border-radius: var(--rayon-bordure);
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-user:hover {
    background: var(--couleur-bouton-fond-hover);
    color: var(--couleur-bouton-hover);
    box-shadow: 0 0 10px var(--couleur-bouton-fond-hover);
}

/* Menu mobile */
.menu-toggle {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .menu {
        display: none;
        flex-direction: column;
        background: rgba(40,85,134,0.95);
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        padding: 1rem;
        gap: 1rem;
        box-shadow: var(--ombre-boite);
    }

    .menu.active {
        display: flex;
        animation: slideDown 0.3s ease forwards;
    }

    .menu-toggle {
        display: block;
        color: var(--couleur-texte-bandeau);
    }

    @keyframes slideDown {
        from { transform: translateY(-20px); opacity: 0; }
        to { transform: translateY(0); opacity: 1; }
    }
}