.internal-chat-app {
  --chat-bg: #f5f7fb;
  --chat-card: #ffffff;
  --chat-muted: #6b7280;
  --chat-border: #dfe4ee;
  --chat-brand: #1f4fcc;
  --chat-brand-soft: #e8eeff;
  --chat-danger: #b42318;
  --chat-success: #0a7f40;
  --chat-radius: 16px;
}

.internal-chat-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.internal-chat-sidebar,
.internal-chat-thread {
  background: var(--chat-card);
  border: 1px solid var(--chat-border);
  border-radius: var(--chat-radius);
}

.internal-chat-toolbar {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-bottom: 1px solid var(--chat-border);
}

.internal-chat-toolbar input,
.internal-chat-filters select,
.internal-chat-composer textarea {
  width: 100%;
  border: 1px solid var(--chat-border);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}

.internal-chat-toolbar button,
.internal-chat-composer button,
.internal-chat-actions button,
.internal-chat-template button,
.internal-chat-load-older {
  border: 1px solid var(--chat-border);
  background: #fff;
  color: #111827;
  border-radius: 10px;
  padding: 9px 12px;
  cursor: pointer;
  font: inherit;
}

.internal-chat-toolbar button:hover,
.internal-chat-composer button:hover,
.internal-chat-actions button:hover,
.internal-chat-template button:hover,
.internal-chat-load-older:hover {
  border-color: #b6c2d8;
}

.internal-chat-filters {
  padding: 10px 12px;
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  gap: 8px;
}

.internal-chat-conversations {
  max-height: 58vh;
  overflow: auto;
}

.internal-chat-empty {
  padding: 18px 14px;
  color: var(--chat-muted);
  font-size: 0.92rem;
}

.internal-chat-item {
  border-bottom: 1px solid #eef2f8;
  padding: 12px;
  cursor: pointer;
  display: grid;
  gap: 6px;
}

.internal-chat-item:hover {
  background: #f8fbff;
}

.internal-chat-item.is-active {
  background: var(--chat-brand-soft);
  border-left: 3px solid var(--chat-brand);
  padding-left: 9px;
}

.internal-chat-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.internal-chat-item-title {
  font-weight: 700;
  color: #1f2937;
}

.internal-chat-item-time {
  color: var(--chat-muted);
  font-size: 0.8rem;
  white-space: nowrap;
}

.internal-chat-item-preview {
  color: #4b5563;
  font-size: 0.9rem;
}

.internal-chat-item-meta {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}

.internal-chat-type {
  color: var(--chat-muted);
  font-size: 0.78rem;
}

.internal-chat-unread {
  min-width: 22px;
  height: 22px;
  border-radius: 11px;
  background: var(--chat-brand);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  padding: 0 6px;
}

.internal-chat-thread-head {
  padding: 12px;
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  gap: 8px;
  justify-content: space-between;
  align-items: flex-start;
}

.internal-chat-thread-title {
  margin: 0;
  color: #111827;
  font-size: 1.1rem;
}

.internal-chat-thread-subtitle {
  margin: 4px 0 0;
  color: var(--chat-muted);
  font-size: 0.88rem;
}

.internal-chat-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.internal-chat-actions .is-danger {
  color: var(--chat-danger);
}

.internal-chat-actions .is-success {
  color: var(--chat-success);
}

.internal-chat-actions a {
  border: 1px solid var(--chat-border);
  border-radius: 10px;
  padding: 9px 12px;
  text-decoration: none;
  color: #111827;
  background: #fff;
  font-size: 0.92rem;
}

.internal-chat-next-booking {
  margin: 10px 12px 0;
  border: 1px solid #d9e4ff;
  background: #f4f7ff;
  border-radius: 12px;
  padding: 10px 12px;
  color: #23314f;
  display: none;
}

.internal-chat-next-booking.is-active {
  display: block;
}

.internal-chat-next-booking-actions {
  margin-top: 8px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.internal-chat-next-booking-actions a {
  background: #fff;
  border: 1px solid #c8d7ff;
  padding: 6px 10px;
  border-radius: 8px;
  text-decoration: none;
  color: #1f3b8f;
  font-size: 0.85rem;
}

.internal-chat-messages {
  min-height: 320px;
  max-height: 62vh;
  overflow: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--chat-bg);
}

.internal-chat-messages .message {
  display: flex;
  margin-bottom: 12px;
  animation: fadeInUp 0.2s ease;
}

.internal-chat-messages .message:last-child {
  margin-bottom: 2px;
}

.internal-chat-messages .message.outgoing {
  justify-content: flex-end;
}

.internal-chat-messages .message.incoming {
  justify-content: flex-start;
}

.internal-chat-messages .message.system {
  justify-content: center;
}

.internal-chat-messages .bubble {
  max-width: 75%;
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: 18px;
  word-wrap: break-word;
  word-break: break-word;
}

.internal-chat-messages .message.outgoing .bubble {
  background: #2f6f54;
  color: #ffffff;
  border-radius: 18px 18px 4px 18px;
}

.internal-chat-messages .message.incoming .bubble {
  background: #f1f2f4;
  color: #1a1a1a;
  border-color: #e7e8ec;
  border-radius: 18px 18px 18px 4px;
}

.internal-chat-messages .message.system .bubble {
  background: #fff6dc;
  color: #7a5a00;
  border-color: #f1de98;
  border-radius: 14px;
}

.internal-chat-messages .meta {
  margin-top: 6px;
  font-size: 11px;
  opacity: 0.7;
  color: #6b7280;
  display: flex;
  align-items: center;
  gap: 8px;
}

.internal-chat-messages .message.outgoing .meta {
  justify-content: flex-end;
  text-align: right;
}

.internal-chat-messages .message.incoming .meta,
.internal-chat-messages .message.system .meta {
  justify-content: flex-start;
  text-align: left;
}

.internal-chat-messages .meta-status {
  font-weight: 600;
}

.internal-chat-load-older {
  margin: 10px 12px 0;
}

.internal-chat-template {
  border-top: 1px solid var(--chat-border);
  padding: 10px 12px;
  display: none;
  gap: 8px;
}

.internal-chat-template.is-active {
  display: flex;
}

.internal-chat-template select {
  width: 100%;
  border: 1px solid var(--chat-border);
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
}

.internal-chat-template-admin {
  border-top: 1px solid var(--chat-border);
  padding: 10px 12px;
  display: none;
  gap: 8px;
}

.internal-chat-template-admin.is-active {
  display: grid;
  grid-template-columns: 1fr;
}

.internal-chat-template-admin input,
.internal-chat-template-admin textarea {
  width: 100%;
  border: 1px solid var(--chat-border);
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
}

.internal-chat-template-admin button {
  width: fit-content;
}

.internal-chat-composer {
  border-top: 1px solid var(--chat-border);
  padding: 10px 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: end;
}

.internal-chat-composer textarea {
  min-height: 52px;
  max-height: 150px;
  resize: vertical;
}

.internal-chat-composer button {
  background: var(--chat-brand);
  color: #fff;
  border-color: var(--chat-brand);
}

.internal-chat-composer button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.internal-chat-toast {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 9999;
  background: #111827;
  color: #fff;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.86rem;
  box-shadow: 0 14px 24px rgba(17, 24, 39, 0.22);
}

@media (max-width: 1024px) {
  .internal-chat-messages .bubble {
    max-width: 85%;
  }
}

@media (min-width: 1025px) {
  .internal-chat-shell {
    grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
    min-height: 72vh;
  }

  .internal-chat-conversations {
    max-height: calc(72vh - 110px);
  }

  .internal-chat-messages {
    max-height: calc(72vh - 238px);
  }

  .internal-chat-messages .bubble {
    max-width: 65%;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}