/* =====================================================
   CLASSROOM CHAT - Estilos de Vista Integrada
   Sistema de mensajería entre profesores y alumnos
   ===================================================== */

/* Variables */
:root {
  --chat-primary: #1e1e1e;
  --chat-secondary: #2d2d2d;
  --chat-accent: #656f77;
  --chat-accent-hover: #4a5259;
  --chat-bg: #ffffff;
  --chat-bg-secondary: #f5f5f7;
  --chat-border: #e5e5e5;
  --chat-text: #1e1e1e;
  --chat-text-muted: #666666;
  --chat-bubble-sent: #1e1e1e;
  --chat-bubble-received: #f0f0f0;
  --chat-online: #22c55e;
}

/* =====================================================
   Contenedor Principal de Mensajes
   ===================================================== */
.messages-container {
  display: flex;
  height: calc(100vh - 80px);
  background: var(--chat-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--chat-border);
}

/* =====================================================
   Panel de Contactos (Izquierda)
   ===================================================== */
.messages-contacts-panel {
  width: 320px;
  min-width: 280px;
  border-right: 1px solid var(--chat-border);
  display: flex;
  flex-direction: column;
  background: var(--chat-bg-secondary);
}

.messages-contacts-header {
  padding: 20px;
  border-bottom: 1px solid var(--chat-border);
  background: var(--chat-bg);
}

.messages-contacts-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--chat-text);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.messages-contacts-header h3 i {
  width: 22px;
  height: 22px;
  color: var(--chat-accent);
}

/* Búsqueda */
.messages-search {
  padding: 16px;
  background: var(--chat-bg);
  border-bottom: 1px solid var(--chat-border);
  position: relative;
}

.messages-search input {
  font-family: 'Inter';
  width: 100%;
  padding: 10px 14px 10px 40px;
  border: 1px solid var(--chat-border);
  border-radius: 8px;
  font-size: 0.9rem;
  background: var(--chat-bg-secondary);
  transition: all 0.2s ease;
}

.messages-search input:focus {
  outline: none;
  border-color: var(--chat-accent);
  background: var(--chat-bg);
}

.messages-search i {
  position: absolute;
  left: 28px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--chat-text-muted);
}

/* Tabs de contactos */
.messages-tabs {
  display: flex;
  border-bottom: 1px solid var(--chat-border);
  background: var(--chat-bg);
}

.messages-tab {
  font-family: 'Inter';
  flex: 1;
  padding: 12px 16px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--chat-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  position: relative;
}

.messages-tab::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--chat-primary);
  transition: width 0.2s ease;
}

.messages-tab:hover {
  background: rgba(0, 0, 0, 0.03);
  color: var(--chat-text);
}

.messages-tab.active {
  font-family: 'Inter';
  color: var(--chat-primary);
}

.messages-tab.active::after {
  width: 60%;
}

.messages-tab i {
  width: 16px;
  height: 16px;
}

.tab-badge {
  background: var(--chat-primary);
  color: white;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

.tab-badge-unread {
  background: #e53935 !important;
}

/* Sub-tabs dentro de Contactos */
.messages-sub-tabs {
  margin: 0 -8px;
  padding: 0;
  border-bottom: 1px solid var(--chat-border);
  background: var(--chat-bg);
}

.messages-sub-tabs .messages-tab {
  padding: 10px 12px;
  font-size: 0.8rem;
}

/* Lista de contactos */
.messages-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.messages-list-section {
  display: block;
}

.messages-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  color: var(--chat-text-muted);
  gap: 12px;
}

.messages-loading .spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--chat-border);
  border-top-color: var(--chat-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.messages-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  color: var(--chat-text-muted);
  text-align: center;
}

.messages-empty i {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  opacity: 0.5;
}

.messages-empty p {
  margin: 0;
  font-size: 0.9rem;
}

/* Item de contacto */
.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 4px;
  background: var(--chat-bg);
  border: 1px solid transparent;
}

.contact-item:hover {
  background: var(--chat-bg);
  border-color: var(--chat-border);
  transform: translateX(4px);
}

.contact-item.active {
  background: var(--chat-primary);
  color: white;
  border-color: var(--chat-primary);
}

.contact-item.active .contact-name,
.contact-item.active .contact-course,
.contact-item.active .contact-role {
  color: white;
}

.contact-item.active .contact-role i {
  color: rgba(255, 255, 255, 0.7);
}

.contact-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--chat-accent), var(--chat-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}

.contact-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.contact-avatar .avatar-initials {
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
}

.contact-info {
  flex: 1;
  min-width: 0;
}

.contact-name {
  font-family: 'Inter';
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--chat-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.contact-course {
  font-family: 'Inter';
  font-size: 0.8rem;
  color: var(--chat-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.contact-role {
  font-family: 'Inter';
  font-size: 0.75rem;
  color: var(--chat-accent);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
}

.contact-role i {
  width: 12px;
  height: 12px;
}

.contact-badge {
  background: #e53935;
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}

/* Indicador de mensajes no leídos (punto rojo) */
.contact-unread-dot {
  width: 10px;
  height: 10px;
  background: #e53935;
  border-radius: 50%;
  flex-shrink: 0;
  animation: pulse-dot 1.5s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.8;
  }
}

.contact-item.has-unread .contact-name {
  font-weight: 700;
}

.contact-item.active .contact-unread-dot {
  background: white;
}

/* =====================================================
   Bandeja de Entrada - Items de Conversación
   ===================================================== */
.bandeja-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 4px;
  background: var(--chat-bg);
  border: 1px solid transparent;
}

.bandeja-item:hover {
  background: var(--chat-bg);
  border-color: var(--chat-border);
  transform: translateX(4px);
}

.bandeja-item.active {
  background: var(--chat-primary);
  color: white;
  border-color: var(--chat-primary);
}

.bandeja-item.active .bandeja-name,
.bandeja-item.active .bandeja-preview,
.bandeja-item.active .bandeja-time {
  color: white;
}

.bandeja-item.has-unread .bandeja-name {
  font-weight: 700;
}

.bandeja-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--chat-accent), var(--chat-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  position: relative;
}

.bandeja-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bandeja-avatar .avatar-initials {
  color: white;
  font-weight: 600;
  font-size: 1rem;
}

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

.bandeja-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}

.bandeja-name {
  font-family: 'Inter';
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--chat-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bandeja-time {
  font-size: 0.75rem;
  color: var(--chat-text-muted);
  white-space: nowrap;
}

.bandeja-preview {
  font-family: 'Inter';
  font-size: 0.85rem;
  color: var(--chat-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bandeja-unread-dot {
  width: 10px;
  height: 10px;
  background: #e53935;
  border-radius: 50%;
  flex-shrink: 0;
  animation: pulse-dot 1.5s ease-in-out infinite;
}

.bandeja-item.active .bandeja-unread-dot {
  background: white;
}

/* =====================================================
   Panel de Conversación (Derecha)
   ===================================================== */
.messages-conversation-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--chat-bg);
  min-width: 0;
}

/* Header de conversación */
.conversation-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--chat-bg);
}

/* Botón eliminar conversación */
.conversation-delete-btn {
  margin-left: auto;
  padding: 8px;
  border: none;
  background: transparent;
  color: var(--chat-text-muted);
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.conversation-delete-btn:hover {
  background: #fee2e2;
  color: #dc2626;
}

.conversation-delete-btn i {
  width: 18px;
  height: 18px;
}

.conversation-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--chat-accent), var(--chat-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.conversation-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.conversation-avatar .avatar-initials {
  color: white;
  font-weight: 600;
  font-size: 1rem;
}

.conversation-info {
  flex: 1;
}

.conversation-name {
  font-family: 'Inter';
  font-weight: 600;
  font-size: 1rem;
  color: var(--chat-text);
}

.conversation-role {
  font-family: 'Inter';
  font-size: 0.8rem;
  color: var(--chat-text-muted);
}

/* Área de mensajes */
.conversation-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--chat-bg-secondary);
}

/* Estado vacío */
.conversation-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--chat-text-muted);
  text-align: center;
  padding: 40px;
  background: var(--chat-bg-secondary);
}

.conversation-empty i {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
  opacity: 0.3;
}

.conversation-empty h4 {
  font-family: 'Inter';
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--chat-text);
  margin: 0 0 8px 0;
}

.conversation-empty p {
  font-family: 'Inter';
  font-size: 0.9rem;
  margin: 0;
  max-width: 280px;
}

/* Burbujas de mensajes */
.message-bubble {
  max-width: 70%;
  animation: messageIn 0.2s ease;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

/* Avatar en mensajes */
.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--chat-accent), var(--chat-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
  margin-top: 2px;
}

.message-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.message-avatar .avatar-initials {
  color: white;
  font-weight: 600;
  font-size: 0.7rem;
}

.message-bubble.sent .message-avatar {
  order: 2;
}

.message-bubble.received .message-avatar {
  order: 0;
}

/* Wrapper para contenido y meta del mensaje */
.message-wrapper {
  flex: 1;
  min-width: 0;
  max-width: calc(100% - 42px);
}

@keyframes messageIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message-bubble.sent {
  align-self: flex-end;
}

.message-bubble.received {
  align-self: flex-start;
}

.message-content {
  padding: 12px 16px;
  border-radius: 16px;
  word-wrap: break-word;
}

.message-bubble.sent .message-content {
  background: var(--chat-bubble-sent);
  color: white;
  border-bottom-right-radius: 4px;
}

.message-bubble.received .message-content {
  background: var(--chat-bubble-received);
  color: var(--chat-text);
  border-bottom-left-radius: 4px;
}

.message-text {
  font-family: 'Inter';
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

.message-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  margin-top: 6px;
  padding: 0 4px;
}

.message-bubble.received .message-meta {
  justify-content: flex-start;
}

.message-time {
  font-size: 0.7rem;
  color: var(--chat-text-muted);
}

.message-status i {
  width: 14px;
  height: 14px;
  color: var(--chat-text-muted);
}

.message-bubble.sent .message-status i {
  color: var(--chat-accent);
}

/* Imágenes en mensajes */
.message-image {
  margin-top: 8px;
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
}

.message-image img {
  max-width: 100%;
  max-height: 300px;
  display: block;
  border-radius: 8px;
}

/* Archivos en mensajes */
.message-file {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 10px;
  margin-top: 8px;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s ease;
}

.message-file:hover {
  background: rgba(0, 0, 0, 0.08);
}

.message-bubble.sent .message-file {
  background: rgba(255, 255, 255, 0.1);
}

.message-bubble.sent .message-file:hover {
  background: rgba(255, 255, 255, 0.15);
}

.message-file-icon {
  width: 40px;
  height: 40px;
  background: var(--chat-accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.message-file-icon i {
  width: 20px;
  height: 20px;
  color: white;
}

.message-file-info {
  flex: 1;
  min-width: 0;
}

.message-file-name {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  align-self: flex-start;
}

.typing-dots {
  display: flex;
  gap: 4px;
}

.typing-dots span {
  width: 8px;
  height: 8px;
  background: var(--chat-accent);
  border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dots span:nth-child(1) { animation-delay: -0.32s; }
.typing-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
  40% { transform: scale(1); opacity: 1; }
}

/* =====================================================
   Área de Input
   ===================================================== */
.conversation-input-area {
  padding: 16px 20px;
  border-top: 1px solid var(--chat-border);
  background: var(--chat-bg);
}

.conversation-input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  background: var(--chat-bg-secondary);
  border: 1px solid var(--chat-border);
  border-radius: 24px;
  padding: 8px 12px;
  transition: border-color 0.2s ease;
}

.conversation-input-wrapper:focus-within {
  border-color: var(--chat-accent);
}

.input-action-btn {
  width: 36px;
  height: 36px;
  aspect-ratio: 1;
  flex-shrink: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
  color: var(--chat-text-muted);
}

.input-action-btn:hover {
  background: var(--chat-border);
  color: var(--chat-text);
}

.input-action-btn i {
  width: 20px;
  height: 20px;
}

#chatMessageInput {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 0;
  font-size: 0.95rem;
  resize: none;
  max-height: 120px;
  line-height: 1.4;
  font-family: inherit;
}

#chatMessageInput:focus {
  outline: none;
}

#chatMessageInput::placeholder {
  color: var(--chat-text-muted);
}

.send-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--chat-primary);
  color: white;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.send-btn:hover {
  background: var(--chat-secondary);
  transform: scale(1.05);
}

.send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.send-btn i {
  width: 18px;
  height: 18px;
}

/* Preview de archivo */
.chat-file-preview {
  margin-bottom: 12px;
}

.file-preview,
.image-preview {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--chat-bg-secondary);
  border: 1px solid var(--chat-border);
  border-radius: 12px;
  position: relative;
}

.image-preview {
  display: inline-block;
  padding: 4px;
}

.image-preview img {
  max-width: 200px;
  max-height: 150px;
  border-radius: 8px;
  display: block;
}

.image-preview-remove,
.file-preview-remove {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 24px;
  height: 24px;
  border: none;
  background: var(--chat-primary);
  color: white;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.image-preview-remove:hover,
.file-preview-remove:hover {
  background: #e53935;
  transform: scale(1.1);
}

.image-preview-remove i,
.file-preview-remove i {
  width: 14px;
  height: 14px;
}

.file-preview-icon {
  width: 44px;
  height: 44px;
  background: var(--chat-accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-preview-icon i {
  width: 22px;
  height: 22px;
  color: white;
}

.file-preview-info {
  flex: 1;
}

.file-preview-name {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--chat-text);
}

.file-preview-size {
  font-size: 0.8rem;
  color: var(--chat-text-muted);
}

/* =====================================================
   Lightbox para imágenes
   ===================================================== */
.chat-lightbox {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: 20000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.chat-lightbox.active {
  display: flex;
}

.chat-lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.chat-lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.chat-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.chat-lightbox-close i {
  width: 24px;
  height: 24px;
}

/* =====================================================
   Toast Notifications
   ===================================================== */
.chat-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 360px;
  z-index: 15000;
  transform: translateX(120%);
  transition: transform 0.3s ease;
  cursor: pointer;
  border: 1px solid var(--chat-border);
}

.chat-toast.show {
  transform: translateX(0);
}

.chat-toast-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--chat-accent), var(--chat-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}

.chat-toast-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.chat-toast-avatar .avatar-initials {
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
}

.chat-toast-content {
  flex: 1;
  min-width: 0;
}

.chat-toast-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--chat-text);
}

.chat-toast-message {
  font-size: 0.85rem;
  color: var(--chat-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-toast-close {
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.chat-toast-close:hover {
  opacity: 1;
}

.chat-toast-close i {
  width: 16px;
  height: 16px;
  color: var(--chat-text-muted);
}

/* =====================================================
   Badge del Sidebar para Chat
   ===================================================== */
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  background: #e53935;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: 10px;
  margin-left: auto;
  animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* =====================================================
   Responsive Design
   ===================================================== */
@media (max-width: 900px) {
  .messages-container {
    flex-direction: column;
    height: calc(100vh - 70px);
  }
  
  .messages-contacts-panel {
    width: 100%;
    max-height: 45%;
    border-right: none;
    border-bottom: 1px solid var(--chat-border);
  }
  
  .messages-conversation-panel {
    flex: 1;
    min-height: 0;
  }
}

@media (max-width: 600px) {
  .messages-container {
    border-radius: 0;
    border: none;
  }
  
  .message-bubble {
    max-width: 85%;
  }
  
  .conversation-input-wrapper {
    padding: 6px 10px;
  }
  
  .chat-toast {
    left: 16px;
    right: 16px;
    bottom: 80px;
    max-width: none;
  }
}