/* =============================================================================
 * SONOYA - nb-chat.css
 * -----------------------------------------------------------------------------
 * Widget de messagerie client - vendeur (D-023).
 * Drawer global accessible sur toute page, 2 vues internes :
 *   1. Liste des conversations
 *   2. Fil de messages (avec zone de saisie)
 *
 * Depend de : nb-dialogs.css (.nb-dialog--drawer-bottom)
 * Comportement : chat-drawer.js
 * ============================================================================= */

@layer components {

  /* ==========================================================================
   * PANEL - conteneur principal
   * ========================================================================== */
  .nb-chat-drawer__panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-height: 100dvh;
    background: var(--nb-color-surface);
    color: var(--nb-color-text);
    overflow: hidden;
  }

  /* ==========================================================================
   * VUES - bascule liste / conversation
   * ========================================================================== */
  .nb-chat-drawer__view { display: none; flex-direction: column; height: 100%; min-height: 0; }
  .nb-chat-drawer__view.is-active { display: flex; }

  /* ==========================================================================
   * HEADER - commun aux 2 vues
   * ========================================================================== */
  .nb-chat-drawer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--nb-space-3);
    padding: var(--nb-space-4) var(--nb-space-4);
    border-bottom: 1px solid var(--nb-color-border);
    flex-shrink: 0;
  }
  .nb-chat-drawer__header-left {
    display: flex;
    align-items: center;
    gap: var(--nb-space-2);
    min-width: 0;
  }
  .nb-chat-drawer__header-left > i { font-size: 1.3rem; color: var(--nb-color-accent); }
  .nb-chat-drawer__header-right {
    display: flex;
    align-items: center;
    gap: var(--nb-space-1);
    flex-shrink: 0;
  }
  .nb-chat-drawer__title {
    font-family: var(--nb-font-heading);
    font-size: var(--nb-fs-lg);
    font-weight: var(--nb-fw-bold);
    line-height: 1;
    margin: 0;
  }
  .nb-chat-drawer__unread-total {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--nb-color-danger);
    color: white;
    font-size: 0.62rem;
    font-weight: var(--nb-fw-bold);
    border-radius: var(--nb-radius-pill);
    line-height: 1;
  }
  .nb-chat-drawer__header-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--nb-radius-md);
    background: transparent;
    color: var(--nb-color-text-muted);
    border: 0;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background var(--nb-dur-fast) var(--nb-ease-standard),
                color var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-drawer__header-btn:hover {
    background: var(--nb-color-surface-hover);
    color: var(--nb-color-text);
  }
  .nb-chat-drawer__back {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--nb-radius-md);
    background: transparent;
    color: var(--nb-color-text);
    border: 0;
    cursor: pointer;
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: background var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-drawer__back:hover { background: var(--nb-color-surface-hover); }

  /* ==========================================================================
   * SEARCH BAR
   * ========================================================================== */
  .nb-chat-drawer__search {
    padding: var(--nb-space-2) var(--nb-space-4);
    border-bottom: 1px solid var(--nb-color-border);
    flex-shrink: 0;
  }
  .nb-chat-drawer__search-inner {
    display: flex;
    align-items: center;
    gap: var(--nb-space-2);
    background: var(--nb-color-surface-alt);
    border-radius: var(--nb-radius-lg);
    padding: var(--nb-space-2) var(--nb-space-3);
  }
  .nb-chat-drawer__search-inner > i { color: var(--nb-color-text-faint); font-size: 1rem; flex-shrink: 0; }
  .nb-chat-drawer__search-input {
    flex: 1;
    background: transparent;
    font-size: var(--nb-fs-sm);
    color: var(--nb-color-text);
    min-width: 0;
    border: 0;
  }
  .nb-chat-drawer__search-input::placeholder { color: var(--nb-color-text-faint); }
  .nb-chat-drawer__search-input:focus { outline: none; }
  .nb-chat-drawer__search-clear {
    display: inline-flex;
    background: transparent;
    border: 0;
    color: var(--nb-color-text-muted);
    cursor: pointer;
    font-size: 1rem;
  }

  /* ==========================================================================
   * FILTRES
   * ========================================================================== */
  .nb-chat-drawer__filters {
    display: flex;
    align-items: center;
    gap: var(--nb-space-2);
    padding: var(--nb-space-3) var(--nb-space-4);
    border-bottom: 1px solid var(--nb-color-border);
    flex-shrink: 0;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .nb-chat-drawer__filters::-webkit-scrollbar { display: none; }
  .nb-chat-drawer__filter {
    display: inline-flex;
    align-items: center;
    gap: var(--nb-space-1);
    padding: var(--nb-space-1) var(--nb-space-3);
    font-size: var(--nb-fs-xs);
    font-weight: var(--nb-fw-semibold);
    color: var(--nb-color-text-muted);
    background: var(--nb-color-surface-alt);
    border: 1px solid transparent;
    border-radius: var(--nb-radius-pill);
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--nb-dur-fast) var(--nb-ease-standard),
                color var(--nb-dur-fast) var(--nb-ease-standard),
                border-color var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-drawer__filter:hover { color: var(--nb-color-text); background: var(--nb-color-surface-hover); }
  .nb-chat-drawer__filter.is-active {
    background: var(--nb-color-accent-soft);
    color: var(--nb-color-accent);
    border-color: var(--nb-color-accent);
  }
  .nb-chat-drawer__filter-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    background: var(--nb-color-danger);
    color: white;
    font-size: 0.55rem;
    font-weight: var(--nb-fw-bold);
    border-radius: var(--nb-radius-pill);
    line-height: 1;
  }

  /* ==========================================================================
   * LISTE DES CONVERSATIONS
   * ========================================================================== */
  .nb-chat-drawer__convos {
    flex: 1;
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .nb-chat-drawer__convo {
    display: flex;
    align-items: flex-start;
    gap: var(--nb-space-3);
    padding: var(--nb-space-3) var(--nb-space-4);
    width: 100%;
    text-align: left;
    background: transparent;
    border: 0;
    border-bottom: 1px solid var(--nb-color-border);
    cursor: pointer;
    transition: background var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-drawer__convo:hover { background: var(--nb-color-surface-hover); }
  .nb-chat-drawer__convo.is-unread { background: var(--nb-color-accent-soft); }
  .nb-chat-drawer__convo.is-unread:hover { background: color-mix(in oklch, var(--nb-color-accent-soft) 70%, var(--nb-color-surface-hover)); }
  .nb-chat-drawer__convo.is-archived { opacity: 0.6; }

  .nb-chat-drawer__convo-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--nb-color-accent);
    color: var(--nb-color-accent-contrast);
    font-family: var(--nb-font-heading);
    font-size: 0.78rem;
    font-weight: var(--nb-fw-bold);
    letter-spacing: var(--nb-ls-tight);
    flex-shrink: 0;
  }
  .nb-chat-drawer__convo-body { flex: 1; min-width: 0; }
  .nb-chat-drawer__convo-top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--nb-space-2);
  }
  .nb-chat-drawer__convo-seller {
    font-size: var(--nb-fs-sm);
    font-weight: var(--nb-fw-bold);
    color: var(--nb-color-text-strong);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .nb-chat-drawer__convo-time {
    font-size: 0.62rem;
    color: var(--nb-color-text-faint);
    white-space: nowrap;
    flex-shrink: 0;
  }
  .nb-chat-drawer__convo-product {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.62rem;
    color: var(--nb-color-text-muted);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .nb-chat-drawer__convo-product > i { font-size: 0.7rem; flex-shrink: 0; }
  .nb-chat-drawer__convo-preview {
    font-size: var(--nb-fs-xs);
    color: var(--nb-color-text-muted);
    margin-top: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: var(--nb-lh-normal);
  }
  .is-unread .nb-chat-drawer__convo-preview { color: var(--nb-color-text); font-weight: var(--nb-fw-medium); }
  .nb-chat-drawer__convo-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 5px;
    background: var(--nb-color-accent);
    color: var(--nb-color-accent-contrast);
    font-size: 0.6rem;
    font-weight: var(--nb-fw-bold);
    border-radius: var(--nb-radius-pill);
    flex-shrink: 0;
    margin-top: var(--nb-space-1);
  }

  /* ==========================================================================
   * EMPTY STATE
   * ========================================================================== */
  .nb-chat-drawer__empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--nb-space-2);
    padding: var(--nb-space-8);
    text-align: center;
    color: var(--nb-color-text-faint);
  }
  .nb-chat-drawer__empty > i { font-size: 3rem; opacity: 0.4; }
  .nb-chat-drawer__empty > h4 { font-size: var(--nb-fs-base); color: var(--nb-color-text-muted); margin: 0; }
  .nb-chat-drawer__empty > p { font-size: var(--nb-fs-sm); margin: 0; }

  /* ==========================================================================
   * VUE CONVERSATION - HEADER
   * ========================================================================== */
  .nb-chat-drawer__header--convo {
    gap: var(--nb-space-2);
  }
  .nb-chat-drawer__convo-header-info {
    display: flex;
    align-items: center;
    gap: var(--nb-space-2);
    flex: 1;
    min-width: 0;
  }
  .nb-chat-drawer__convo-header-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--nb-color-accent);
    color: var(--nb-color-accent-contrast);
    font-family: var(--nb-font-heading);
    font-size: 0.7rem;
    font-weight: var(--nb-fw-bold);
    flex-shrink: 0;
  }
  .nb-chat-drawer__convo-header-meta { min-width: 0; }
  .nb-chat-drawer__convo-header-name {
    display: block;
    font-size: var(--nb-fs-sm);
    font-weight: var(--nb-fw-bold);
    color: var(--nb-color-text-strong);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .nb-chat-drawer__convo-header-status {
    font-size: 0.62rem;
    color: var(--nb-color-text-faint);
  }

  /* ==========================================================================
   * PRODUCT CONTEXT BANNER
   * ========================================================================== */
  .nb-chat-drawer__product-ctx {
    padding: var(--nb-space-2) var(--nb-space-4);
    background: var(--nb-color-surface-alt);
    border-bottom: 1px solid var(--nb-color-border);
    flex-shrink: 0;
  }
  .nb-chat-drawer__product-ctx-inner {
    display: flex;
    align-items: center;
    gap: var(--nb-space-3);
  }
  .nb-chat-drawer__product-ctx-img {
    width: 40px;
    height: 40px;
    border-radius: var(--nb-radius-sm);
    object-fit: cover;
    flex-shrink: 0;
  }
  .nb-chat-drawer__product-ctx-info { flex: 1; min-width: 0; }
  .nb-chat-drawer__product-ctx-label {
    font-size: 0.58rem;
    color: var(--nb-color-text-faint);
    text-transform: uppercase;
    letter-spacing: var(--nb-ls-wider);
  }
  .nb-chat-drawer__product-ctx-name {
    display: block;
    font-size: var(--nb-fs-xs);
    font-weight: var(--nb-fw-semibold);
    color: var(--nb-color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .nb-chat-drawer__product-ctx-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--nb-color-text-muted);
    font-size: 1rem;
    flex-shrink: 0;
    border-radius: var(--nb-radius-sm);
    transition: color var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-drawer__product-ctx-link:hover { color: var(--nb-color-accent); }

  /* ==========================================================================
   * MESSAGES AREA
   * ========================================================================== */
  .nb-chat-drawer__messages {
    flex: 1;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: var(--nb-space-4);
    display: flex;
    flex-direction: column;
    gap: var(--nb-space-2);
  }

  /* Date separator */
  .nb-chat-msg__date {
    display: flex;
    align-items: center;
    gap: var(--nb-space-3);
    margin: var(--nb-space-3) 0;
  }
  .nb-chat-msg__date::before,
  .nb-chat-msg__date::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--nb-color-border);
  }
  .nb-chat-msg__date > span {
    font-size: 0.6rem;
    color: var(--nb-color-text-faint);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: var(--nb-ls-wider);
  }

  /* Message bubble */
  .nb-chat-msg {
    display: flex;
    flex-direction: column;
    max-width: 82%;
  }
  .nb-chat-msg--client { align-self: flex-end; }
  .nb-chat-msg--seller { align-self: flex-start; }

  .nb-chat-msg__bubble {
    padding: var(--nb-space-3);
    border-radius: var(--nb-radius-lg);
    font-size: var(--nb-fs-sm);
    line-height: var(--nb-lh-relaxed);
    word-break: break-word;
  }
  .nb-chat-msg--client .nb-chat-msg__bubble {
    background: var(--nb-color-accent);
    color: var(--nb-color-accent-contrast);
    border-bottom-right-radius: var(--nb-radius-xs);
  }
  .nb-chat-msg--seller .nb-chat-msg__bubble {
    background: var(--nb-color-surface-alt);
    color: var(--nb-color-text);
    border-bottom-left-radius: var(--nb-radius-xs);
  }

  .nb-chat-msg__time {
    font-size: 0.56rem;
    color: var(--nb-color-text-faint);
    margin-top: 3px;
  }
  .nb-chat-msg--client .nb-chat-msg__time { text-align: right; }

  .nb-chat-msg__status {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 0.58rem;
    color: var(--nb-color-text-faint);
    margin-top: 2px;
    justify-content: flex-end;
  }
  .nb-chat-msg__status > i { font-size: 0.8rem; }
  .nb-chat-msg__status.is-delivered > i { color: var(--nb-color-text-muted); }
  .nb-chat-msg__status.is-read > i { color: var(--nb-color-success); }
  .nb-chat-msg__status.is-read > span { color: var(--nb-color-success); font-weight: var(--nb-fw-medium); }

  /* Image message */
  .nb-chat-msg__image {
    max-width: 200px;
    border-radius: var(--nb-radius-md);
    overflow: hidden;
  }
  .nb-chat-msg__image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--nb-radius-md);
  }

  /* Product link message */
  .nb-chat-msg__product-link {
    display: flex;
    align-items: center;
    gap: var(--nb-space-2);
    padding: var(--nb-space-2);
    background: var(--nb-color-surface);
    border: 1px solid var(--nb-color-border);
    border-radius: var(--nb-radius-md);
    margin-top: var(--nb-space-1);
  }
  .nb-chat-msg__product-link img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: var(--nb-radius-sm);
  }
  .nb-chat-msg__product-link span {
    font-size: var(--nb-fs-xs);
    font-weight: var(--nb-fw-semibold);
    color: var(--nb-color-text);
  }

  /* Order link message */
  .nb-chat-msg__order-link {
    display: inline-flex;
    align-items: center;
    gap: var(--nb-space-2);
    padding: var(--nb-space-2) var(--nb-space-3);
    background: var(--nb-color-info-soft);
    color: var(--nb-color-info);
    font-size: var(--nb-fs-xs);
    font-weight: var(--nb-fw-semibold);
    border-radius: var(--nb-radius-md);
  }
  .nb-chat-msg__order-link > i { font-size: 0.9rem; }

  /* Offer message */
  .nb-chat-msg__offer {
    padding: var(--nb-space-3);
    background: var(--nb-color-surface);
    border: 1px solid var(--nb-color-accent);
    border-radius: var(--nb-radius-lg);
  }
  .nb-chat-msg__offer-title {
    font-size: var(--nb-fs-sm);
    font-weight: var(--nb-fw-bold);
    color: var(--nb-color-text-strong);
  }
  .nb-chat-msg__offer-price {
    font-family: var(--nb-font-heading);
    font-size: var(--nb-fs-lg);
    font-weight: var(--nb-fw-bold);
    color: var(--nb-color-accent);
    margin-top: var(--nb-space-1);
  }
  .nb-chat-msg__offer-meta {
    font-size: 0.65rem;
    color: var(--nb-color-text-muted);
    margin-top: var(--nb-space-1);
  }
  .nb-chat-msg__offer-actions {
    display: flex;
    gap: var(--nb-space-2);
    margin-top: var(--nb-space-3);
  }
  .nb-chat-msg__offer-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--nb-space-2) var(--nb-space-3);
    border-radius: var(--nb-radius-md);
    font-size: var(--nb-fs-xs);
    font-weight: var(--nb-fw-bold);
    cursor: pointer;
    transition: background var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-msg__offer-btn--accept {
    background: var(--nb-color-accent);
    color: var(--nb-color-accent-contrast);
    border: 0;
  }
  .nb-chat-msg__offer-btn--accept:hover { background: var(--nb-color-accent-hover); }
  .nb-chat-msg__offer-btn--decline {
    background: transparent;
    color: var(--nb-color-text-muted);
    border: 1px solid var(--nb-color-border);
  }
  .nb-chat-msg__offer-btn--decline:hover { border-color: var(--nb-color-danger); color: var(--nb-color-danger); }

  /* System message */
  .nb-chat-msg__system {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--nb-space-2);
    padding: var(--nb-space-2) var(--nb-space-3);
    font-size: 0.65rem;
    color: var(--nb-color-text-faint);
    text-align: center;
  }
  .nb-chat-msg__system > i { font-size: 0.8rem; }

  /* ==========================================================================
   * COMPOSE BAR
   * ========================================================================== */
  .nb-chat-drawer__compose {
    display: flex;
    align-items: flex-end;
    gap: var(--nb-space-2);
    padding: var(--nb-space-3) var(--nb-space-4);
    border-top: 1px solid var(--nb-color-border);
    background: var(--nb-color-surface);
    flex-shrink: 0;
  }
  .nb-chat-drawer__compose-actions {
    display: flex;
    align-items: center;
    gap: var(--nb-space-1);
    flex-shrink: 0;
  }
  .nb-chat-drawer__compose-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--nb-radius-md);
    background: transparent;
    border: 0;
    color: var(--nb-color-text-muted);
    cursor: pointer;
    font-size: 1.15rem;
    transition: color var(--nb-dur-fast) var(--nb-ease-standard),
                background var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-drawer__compose-btn:hover {
    color: var(--nb-color-accent);
    background: var(--nb-color-accent-soft);
  }
  .nb-chat-drawer__compose-input-wrap {
    flex: 1;
    min-width: 0;
  }
  .nb-chat-drawer__compose-input {
    display: block;
    width: 100%;
    padding: var(--nb-space-2) var(--nb-space-3);
    background: var(--nb-color-surface-alt);
    border: 1px solid var(--nb-color-border);
    border-radius: var(--nb-radius-lg);
    font-family: var(--nb-font-body);
    font-size: var(--nb-fs-sm);
    color: var(--nb-color-text);
    resize: none;
    min-height: 38px;
    max-height: 120px;
    overflow-y: auto;
    line-height: var(--nb-lh-normal);
    transition: border-color var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-drawer__compose-input::placeholder { color: var(--nb-color-text-faint); }
  .nb-chat-drawer__compose-input:focus {
    outline: none;
    border-color: var(--nb-color-accent);
  }
  .nb-chat-drawer__compose-send {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--nb-color-accent);
    color: var(--nb-color-accent-contrast);
    border: 0;
    cursor: pointer;
    font-size: 1.15rem;
    flex-shrink: 0;
    transition: background var(--nb-dur-fast) var(--nb-ease-standard),
                transform var(--nb-dur-fast) var(--nb-ease-spring);
  }
  .nb-chat-drawer__compose-send:hover {
    background: var(--nb-color-accent-hover);
    transform: scale(1.05);
  }

  /* ==========================================================================
   * CONVO OPTIONS DROPDOWN
   * ========================================================================== */
  .nb-chat-drawer__options-menu {
    position: absolute;
    top: 100%;
    right: 0;
    z-index: 10;
    min-width: 200px;
    background: var(--nb-color-surface);
    border: 1px solid var(--nb-color-border);
    border-radius: var(--nb-radius-lg);
    box-shadow: var(--nb-shadow-lg);
    padding: var(--nb-space-2) 0;
    opacity: 0;
    transform: translateY(-8px) scale(0.96);
    pointer-events: none;
    transition: opacity var(--nb-dur-fast) var(--nb-ease-out-quart),
                transform var(--nb-dur-fast) var(--nb-ease-out-quart);
  }
  .nb-chat-drawer__options-menu.is-open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
  }
  .nb-chat-drawer__options-item {
    display: flex;
    align-items: center;
    gap: var(--nb-space-3);
    width: 100%;
    padding: var(--nb-space-2) var(--nb-space-4);
    background: transparent;
    border: 0;
    color: var(--nb-color-text);
    font-family: var(--nb-font-body);
    font-size: var(--nb-fs-sm);
    cursor: pointer;
    text-align: left;
    transition: background var(--nb-dur-fast) var(--nb-ease-standard),
                color var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-drawer__options-item:hover {
    background: var(--nb-color-surface-hover);
  }
  .nb-chat-drawer__options-item > i { font-size: 1.1rem; color: var(--nb-color-text-muted); flex-shrink: 0; }
  .nb-chat-drawer__options-item:hover > i { color: var(--nb-color-accent); }
  .nb-chat-drawer__options-item--danger { color: var(--nb-color-danger); }
  .nb-chat-drawer__options-item--danger > i { color: var(--nb-color-danger); }
  .nb-chat-drawer__options-item--danger:hover { background: color-mix(in oklch, var(--nb-color-danger) 8%, var(--nb-color-surface)); }
  .nb-chat-drawer__options-sep {
    height: 1px;
    background: var(--nb-color-border);
    margin: var(--nb-space-1) 0;
  }

  /* Le header convo doit etre positionne pour que le dropdown fonctionne */
  .nb-chat-drawer__header--convo { position: relative; }

  /* ==========================================================================
   * FLOATING CHAT BUTTON (FAB)
   * ========================================================================== */
  .nb-chat-fab {
    position: fixed;
    bottom: var(--nb-space-6);
    right: var(--nb-space-6);
    z-index: calc(var(--nb-z-header) - 2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--nb-color-accent);
    color: var(--nb-color-accent-contrast);
    border: 0;
    cursor: pointer;
    font-size: 1.5rem;
    box-shadow: var(--nb-shadow-lg);
    transition: background var(--nb-dur-fast) var(--nb-ease-standard),
                transform var(--nb-dur-fast) var(--nb-ease-spring),
                box-shadow var(--nb-dur-fast) var(--nb-ease-standard);
  }
  .nb-chat-fab:hover {
    background: var(--nb-color-accent-hover);
    transform: scale(1.08);
    box-shadow: var(--nb-shadow-xl);
  }
  .nb-chat-fab__badge {
    position: absolute;
    top: -2px;
    right: -2px;
    min-width: 20px;
    height: 20px;
    padding: 0 5px;
    background: var(--nb-color-danger);
    color: white;
    font-size: 0.6rem;
    font-weight: var(--nb-fw-bold);
    border-radius: var(--nb-radius-pill);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--nb-color-surface);
    line-height: 1;
  }

  /* Masquer le FAB sur mobile (nav bottom a deja un bouton chat) */
  @media (max-width: 768px) {
    .nb-chat-fab { bottom: calc(var(--nb-mobile-nav-h, 64px) + var(--nb-space-4)); right: var(--nb-space-4); width: 48px; height: 48px; font-size: 1.3rem; }
  }
}