/* ==========================================================================
   SIDEBAR
   ========================================================================== */
.sidebar {
    width: 260px;
    background: var(--fond-secondaire);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: relative;
    flex-shrink: 0;
}
.sidebar.repliee {
    width: 56px;
    overflow: visible;
}
.sidebar.repliee .sidebar-content {
    opacity: 0;
    pointer-events: none;
}
.sidebar.repliee .sidebar-nav-hub {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    padding: 12px 0;
    gap: 12px;
}
.sidebar-nav-hub {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-bottom: 1px solid var(--bordure);
}
.sidebar.repliee .sidebar-nav-hub {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    padding: 12px 0;
    gap: 12px;
    border-bottom: none;
}

/* Uniformiser tous les boutons de navigation */
.sidebar-nav-hub .btn-toggle-sidebar,
.sidebar-nav-hub .btn-nav-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--bordure);
    background: var(--fond-principal);
    color: var(--texte-secondaire);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 12px;
}

.sidebar-nav-hub .btn-toggle-sidebar:hover,
.sidebar-nav-hub .btn-nav-icon:hover {
    background: var(--fond-tertiaire);
    color: var(--texte-principal);
    border-color: var(--accent);
}
.sidebar-header {
    display: none;
}
.sidebar-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    border-right: 1px solid var(--bordure);
    /* ===== FIX: Permet scroll dans enfants ===== */
    min-height: 0;
    overflow: hidden;
}
.btn-toggle-sidebar {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: 1px solid var(--bordure);
    background: var(--fond-principal);
    color: var(--texte-secondaire);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}
.btn-toggle-sidebar:hover {
    background: var(--fond-tertiaire);
    color: var(--texte-principal);
    border-color: var(--accent);
}
.historique-liste {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}
.historique-item {
    padding: 10px 14px;
    border-radius: var(--rayon);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 13px;
    border: 1px solid transparent;
    position: relative;
    padding-right: 36px;
}
.historique-item:hover {
    background: var(--fond-tertiaire);
    border-color: var(--bordure);
    transform: translateX(2px);
}
.historique-item.actif {
    background: var(--accent-leger);
    color: var(--accent);
    border-color: var(--accent);
    font-weight: 500;
}
.historique-item .btn-supprimer-conv {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity 0.2s;
    width: 24px;
    height: 24px;
    padding: 0;
    font-size: 12px;
}
.historique-item:hover .btn-supprimer-conv {
    opacity: 1;
}
.btn-nouvelle-conv {
    width: 28px;
    height: 28px;
    background: var(--accent-leger);
    color: var(--accent);
    border: 1px solid var(--accent);
    font-size: 12px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.btn-nouvelle-conv i {
    font-size: 12px;
}
.btn-nouvelle-conv:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-1px);
}

/* Harmonisation de la taille des boutons dans le header de la sidebar */
.sidebar-header .btn-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    font-size: 12px;
}