/* ── Mailbox Modal ───────────────────────────────────────────────────── */

.mailbox-modal {
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}

.mailbox-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.mailbox-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
  font-size: 1rem;
}

.mailbox-unread-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 var(--space-xs);
  border-radius: 10px;
  background: var(--color-error);
  color: var(--fab-text);
  font-size: var(--font-size-3xs, 0.7rem);
  font-weight: 700;
}

.mailbox-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.mailbox-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: 0 var(--space-lg) var(--space-sm);
  border-bottom: var(--btn-border-width) solid var(--border);
}

.mailbox-tab {
  justify-content: center;
  min-height: 32px;
  padding: var(--space-sm) var(--space-md);
  color: var(--text-muted);
  border-color: var(--border);
  background: var(--surface);
}

.mailbox-tab:hover {
  color: var(--text);
}

.mailbox-tab.active {
  color: var(--text);
  border-color: var(--todo);
  background: var(--card-hover);
  box-shadow: var(--focus-ring);
  font-weight: 600;
}

.mailbox-tab-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16px;
  height: 16px;
  padding: 0 var(--btn-border-width);
  border-radius: var(--radius-md);
  background: var(--color-error);
  color: var(--fab-text);
  font-size: var(--font-size-4xs, 0.65rem);
  font-weight: 700;
}

.mailbox-content {
  flex: 1;
  min-height: 0;
  padding: var(--space-lg);
  overflow-y: auto;
  max-height: calc(80vh - var(--header-height) - var(--space-2xl) - var(--space-xl));
  position: relative;
}

.mailbox-list {
  display: flex;
  flex-direction: column;
  gap: var(--btn-border-width);
}

.mailbox-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(var(--space-2xl) + var(--space-lg)) var(--space-lg);
  color: var(--text-muted);
  text-align: center;
  gap: var(--space-md);
}

.mailbox-empty p {
  margin: 0;
  font-size: var(--font-size-base, 0.9rem);
}

.mailbox-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-instant);
}

.mailbox-item:hover {
  background: var(--card-hover);
}

.mailbox-item.unread {
  background: color-mix(in srgb, var(--todo) 10%, transparent);
  font-weight: 500;
}

.mailbox-item-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  flex-shrink: 0;
}

.mailbox-item-content {
  flex: 1;
  min-width: 0;
}

.mailbox-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--btn-border-width);
}

.mailbox-item-from,
.mailbox-item-to {
  font-size: var(--font-size-sm, 0.85rem);
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mailbox-item-time {
  font-size: var(--font-size-2xs, 0.75rem);
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.mailbox-item-preview {
  font-size: var(--font-size-xs, 0.8rem);
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mailbox-item-unread-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--todo);
  flex-shrink: 0;
  margin-top: var(--space-xs);
}

/* Conversation grouping */
.mailbox-conversations {
  display: flex;
  flex-direction: column;
  gap: var(--btn-border-width);
}

.mailbox-conversation-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-instant);
  position: relative;
}

.mailbox-conversation-group:hover {
  background: var(--card-hover);
}

.mailbox-conversation-group.unread {
  background: color-mix(in srgb, var(--todo) 10%, transparent);
  font-weight: 500;
}

.mailbox-group-unread-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 var(--space-xs);
  font-size: var(--font-size-xs, 0.8rem);
  font-weight: 600;
  background: var(--todo);
  color: var(--fab-text);
  border-radius: 10px;
  flex-shrink: 0;
  margin-top: var(--space-xs);
}

/* Message detail view */
.mailbox-message-detail {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.mailbox-message-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.mailbox-message-detail-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xs, 0.8rem);
  color: var(--text-muted);
}

.mailbox-message-detail-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.mailbox-message-type {
  display: inline-flex;
  padding: var(--btn-border-width) var(--space-sm);
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  font-size: var(--font-size-2xs, 0.75rem);
  color: var(--text-muted);
}

.mailbox-message-time {
  font-size: var(--font-size-2xs, 0.75rem);
}

.mailbox-message-participants {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.mailbox-participant {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm, 0.85rem);
}

.mailbox-participant-label {
  color: var(--text-muted);
}

.mailbox-participant-value {
  display: flex;
  align-items: center;
  gap: var(--btn-border-width);
  color: var(--text);
}

.mailbox-message-body {
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base, 0.9rem);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.mailbox-reply-context-wrapper {
  margin-bottom: var(--space-xs);
}

.mailbox-reply-context {
  display: flex;
  width: 100%;
  align-items: center;
  gap: var(--space-xs);
  margin: 0;
  padding: var(--space-sm) var(--space-md);
  border: 0;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--text-muted) 12%, transparent);
  color: var(--text-muted);
  font-size: var(--font-size-xs, 0.8rem);
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
  white-space: pre-wrap;
  word-break: break-word;
}

.mailbox-reply-context:hover {
  background: var(--card-hover);
}

.mailbox-reply-context:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring-strong);
}

.mailbox-reply-context__chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mailbox-reply-context__nested {
  margin-top: var(--space-xs);
  margin-left: var(--space-md);
  padding-left: var(--space-md);
  border-left: var(--btn-border-width) solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mailbox-reply-context__error {
  color: var(--color-error);
}

/* Conversation thread */
.mailbox-conversation {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mailbox-conversation-label {
  font-size: var(--font-size-xs, 0.8rem);
  color: var(--text-muted);
  font-weight: 600;
}

.mailbox-conversation-msg {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  border-left: calc(var(--btn-border-width) * 3) solid transparent;
}

.mailbox-conversation-msg.current {
  border-left-color: var(--todo);
  background: color-mix(in srgb, var(--todo) 10%, transparent);
}

.mailbox-conversation-msg-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--btn-border-width);
  font-size: var(--font-size-xs, 0.8rem);
  color: var(--text-muted);
}

.mailbox-conversation-msg-body {
  font-size: var(--font-size-sm, 0.85rem);
  line-height: 1.4;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Agents tab */
.mailbox-agents {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  min-height: calc(var(--space-xl) * 2 + var(--space-lg));
}

.mailbox-agents-dropdown {
  flex-shrink: 0;
}

.mailbox-agents-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.mailbox-compose-btn {
  flex-shrink: 0;
}

.mailbox-agent-select {
  width: 100%;
  max-width: 300px;
}

.mailbox-agents-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--btn-border-width);
}

/* === Mailbox Agent Sub-Tabs === */
.mailbox-agent-subtabs {
  display: flex;
  flex-direction: row;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: var(--btn-border-width) solid var(--border);
}

.mailbox-agent-subtab {
  justify-content: center;
  min-height: calc(var(--space-lg) + var(--space-sm) - var(--btn-border-width));
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-xs, 0.8rem);
  color: var(--text-muted);
  border-color: var(--border);
  background: var(--surface);
}

.mailbox-agent-subtab:hover {
  color: var(--text);
}

.mailbox-agent-subtab.active {
  color: var(--text);
  border-color: var(--in-progress);
  background: var(--card-hover);
  box-shadow: var(--focus-ring);
}

.mailbox-agent-subtab .mailbox-tab-badge {
  margin-left: var(--btn-border-width);
  font-size: var(--font-size-3xs, 0.7rem);
}

/* Skeleton loading */
.mailbox-skeleton {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mailbox-skeleton-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
}

.mailbox-skeleton-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  animation: pulse 1.5s ease-in-out infinite;
}

.mailbox-skeleton-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mailbox-skeleton-line {
  height: 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  animation: pulse 1.5s ease-in-out infinite;
}

.mailbox-skeleton-line--short {
  width: 40%;
}

.mailbox-skeleton-line--long {
  width: 80%;
}

/* ── Mailbox View (full-page) ──────────────────────────────────────── */

.mailbox-view {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.mailbox-view .mailbox-header {
  padding: var(--space-lg) var(--space-xl);
  border-bottom: var(--btn-border-width) solid var(--border);
  background: var(--surface);
}

.mailbox-view .mailbox-tabs {
  padding-top: var(--space-sm);
}

.mailbox-view .mailbox-content {
  flex: 1;
  overflow: hidden;
  padding: var(--space-xl);
  max-height: none;
}

.mailbox-view .mailbox-split-layout {
  display: grid;
  grid-template-columns: minmax(280px, 38%) minmax(0, 1fr);
  gap: var(--space-lg);
  height: 100%;
  min-height: 0;
}

.mailbox-view .mailbox-split-list-pane,
.mailbox-view .mailbox-split-detail-pane {
  min-height: 0;
  overflow-y: auto;
  border: var(--btn-border-width) solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: var(--space-md);
}

.mailbox-view .mailbox-split-detail-pane {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mailbox-view .mailbox-split-empty {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-xl);
  border: 1px dashed color-mix(in srgb, var(--text-muted) 45%, transparent);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  text-align: center;
}

.mailbox-view .mailbox-split-empty p {
  margin: 0;
}

/* ── Mailbox — Mobile (≤ 768px) ───────────────────────────────────── */

@media (max-width: 768px) {
  .mailbox-modal .mailbox-header {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .mailbox-modal .mailbox-title {
    flex-shrink: 0;
  }

  .mailbox-modal .mailbox-header-actions,
  .mailbox-view .mailbox-header-actions {
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-sm);
  }

  .mailbox-modal .mailbox-header-actions .btn,
  .mailbox-modal .mailbox-header-actions .btn-icon,
  .mailbox-modal .mailbox-header-actions .modal-close,
  .mailbox-view .mailbox-header-actions .btn,
  .mailbox-view .mailbox-header-actions .btn-icon {
    min-height: 36px;
  }

  .mailbox-modal .mailbox-header-actions .btn-icon,
  .mailbox-modal .mailbox-header-actions .modal-close,
  .mailbox-view .mailbox-header-actions .btn-icon {
    min-width: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .mailbox-modal .mailbox-header-actions .modal-close {
    padding: 0;
    border-radius: var(--radius-sm);
  }

  .mailbox-modal .mailbox-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .mailbox-modal .mailbox-tabs::-webkit-scrollbar {
    display: none;
  }

  .mailbox-modal .mailbox-tab {
    flex-shrink: 0;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-xs, 0.8rem);
  }

  .mailbox-modal .mailbox-content {
    max-height: calc(100dvh - var(--header-height) - var(--space-2xl) - var(--space-xl));
    padding: var(--space-md);
    padding-bottom: calc(var(--space-md) + env(safe-area-inset-bottom, 0px) + var(--standalone-bottom-gap));
  }

  .mailbox-view[style*="--keyboard-overlap"],
  .mailbox-modal[style*="--keyboard-overlap"] {
    height: var(--vv-height, 100dvh);
    max-height: var(--vv-height, 100dvh);
    transform: translateY(var(--vv-offset-top, 0px));
    will-change: transform;
  }

  .mailbox-view[style*="--keyboard-overlap"] .mailbox-content,
  .mailbox-modal[style*="--keyboard-overlap"] .mailbox-content {
    overflow-y: auto;
    min-height: 0;
  }

  .mailbox-modal .mailbox-message-detail-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .mailbox-modal .mailbox-message-detail-actions {
    flex-wrap: wrap;
  }

  .mailbox-modal .mailbox-message-participants {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .mailbox-modal .mailbox-conversation-msg {
    padding: var(--space-xs) var(--space-md);
  }

  .mailbox-modal .mailbox-reply-context__nested {
    margin-left: var(--space-sm);
    padding-left: var(--space-sm);
  }

  .mailbox-modal .mailbox-agent-select {
    max-width: 100%;
  }

  .mailbox-modal .mailbox-agents {
    min-height: 200px;
  }

  .mailbox-modal .mailbox-empty {
    padding: var(--space-2xl) var(--space-md);
  }

  .mailbox-modal .mailbox-agent-subtabs {
    flex: 1;
  }

  .mailbox-modal .mailbox-agent-subtab {
    flex: 1;
    justify-content: center;
    min-height: 36px;
    padding: var(--space-sm) var(--space-md);
  }

  /* Mailbox View (full-page) mobile overrides */
  .mailbox-view .mailbox-header {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .mailbox-view .mailbox-title {
    flex-shrink: 0;
  }

  .mailbox-view .mailbox-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .mailbox-view .mailbox-tabs::-webkit-scrollbar {
    display: none;
  }

  .mailbox-view .mailbox-tab {
    flex-shrink: 0;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-xs, 0.8rem);
  }

  .mailbox-view .mailbox-content {
    max-height: none;
    overflow-y: auto;
    padding: var(--space-md);
    /* Account for mobile nav bar at bottom */
    padding-bottom: calc(var(--mobile-nav-height) + env(safe-area-inset-bottom, 0px) + var(--standalone-bottom-gap) + var(--space-lg));
  }

  .mailbox-view[style*="--keyboard-overlap"] .mailbox-content {
    padding-bottom: calc(env(safe-area-inset-bottom, 0px) + var(--space-md));
  }

  .mailbox-view .mailbox-split-layout {
    display: block;
    height: auto;
  }

  .mailbox-view .mailbox-split-list-pane,
  .mailbox-view .mailbox-split-detail-pane {
    border: none;
    border-radius: 0;
    background: transparent;
    padding: 0;
    overflow: visible;
  }

  .mailbox-view .mailbox-message-detail-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .mailbox-view .mailbox-message-detail-actions {
    flex-wrap: wrap;
  }

  .mailbox-view .mailbox-message-participants {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .mailbox-view .mailbox-conversation-msg {
    padding: var(--space-xs) var(--space-md);
  }

  .mailbox-view .mailbox-reply-context__nested {
    margin-left: var(--space-sm);
    padding-left: var(--space-sm);
  }

  .mailbox-view .mailbox-agent-select {
    max-width: 100%;
  }

  .mailbox-view .mailbox-agents {
    min-height: 200px;
  }

  .mailbox-view .mailbox-empty {
    padding: var(--space-2xl) var(--space-md);
  }

  .mailbox-view .mailbox-agent-subtabs {
    flex: 1;
  }

  .mailbox-view .mailbox-agent-subtab {
    flex: 1;
    justify-content: center;
    min-height: 36px;
    padding: var(--space-sm) var(--space-md);
  }

  /* Message Composer mobile overrides */
  .message-composer-textarea {
    min-height: calc(var(--space-2xl) + var(--space-lg));
  }

  .message-composer-footer {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .message-composer-footer .btn {
    min-height: 36px;
  }

  .message-composer-field {
    flex-direction: column;
    gap: var(--btn-border-width);
  }

  .message-composer-label {
    padding-top: 0;
    min-width: auto;
  }
}

/* ── Message Composer ──────────────────────────────────────────────── */

.message-composer {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.message-composer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: var(--font-size-md, 0.95rem);
}

.message-composer-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.message-composer-field {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.message-composer-field--content {
  flex-direction: column;
}

.message-composer-label {
  font-size: var(--font-size-sm, 0.85rem);
  color: var(--text-muted);
  min-width: calc(var(--space-xl) + var(--space-lg) + var(--space-sm) + var(--btn-border-width));
  padding-top: var(--space-xs);
  flex-shrink: 0;
}

.message-composer-select {
  flex: 1;
  padding: var(--space-xs) calc(var(--space-sm) + var(--btn-border-width));
  border: var(--btn-border-width) solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text);
  font-size: var(--font-size-sm, 0.85rem);
  font-family: var(--font-primary);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.message-composer-select:focus {
  border-color: var(--todo);
  box-shadow: var(--focus-ring);
}

.message-composer-select:focus-visible {
  border-color: var(--todo);
  box-shadow: var(--focus-ring-strong);
}

.message-composer-recipient-fixed {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm, 0.85rem);
  color: var(--text);
}

.message-composer-textarea {
  width: 100%;
  padding: var(--space-xs) calc(var(--space-sm) + var(--btn-border-width));
  border: var(--btn-border-width) solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text);
  font-size: var(--font-size-base, 0.9rem);
  font-family: var(--font-primary);
  resize: vertical;
  min-height: calc(var(--space-2xl) + var(--space-xl) + var(--space-md));
  line-height: 1.5;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.message-composer-textarea:focus {
  border-color: var(--todo);
  box-shadow: var(--focus-ring);
}

.message-composer-textarea:focus-visible {
  border-color: var(--todo);
  box-shadow: var(--focus-ring-strong);
}

.message-composer-charcount {
  text-align: right;
  font-size: var(--font-size-2xs, 0.75rem);
  color: var(--text-muted);
}

.message-composer-charcount .over-limit {
  color: var(--color-error);
}

.message-composer-field--wake {
  margin-top: var(--space-xs);
}

.message-composer-wake-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm, 0.85rem);
  color: var(--text-muted);
  cursor: pointer;
}

.message-composer-wake-label input[type="checkbox"] {
  margin: 0;
}

.message-composer-wake-label:has(input:disabled) {
  cursor: default;
}

.message-composer-wake-hint {
  margin-left: var(--space-xs);
  font-size: var(--font-size-2xs, 0.75rem);
  color: var(--text-muted);
}

.message-composer-error {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: color-mix(in srgb, var(--color-error) 10%, transparent);
  border-radius: var(--radius-sm);
  color: var(--color-error);
  font-size: var(--font-size-sm, 0.85rem);
}

.message-composer-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
}