.bandeau {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: #1b3a5c;
    color: #fff;
}

.marque {
    color: #fff;
    font-size: 1.15rem;
    font-weight: 600;
    text-decoration: none;
}

.utilisateur {
    font-size: 0.8rem;
    opacity: 0.85;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 55%;
}

.contenu {
    display: block;
    width: 100%;
    max-width: 46rem;
    margin: 0 auto;
    /* Marge basse généreuse : les actions flottantes ne doivent pas masquer le dernier livre. */
    padding: 1rem 1rem 6rem;
}