/* --- Variáveis de Estilo Globais --- */
:root {
  --cor-fundo-app: #F9FAFB;
  --cor-fundo-sidebar: #FFFFFF;
  --cor-fundo-chat: #F9FAFB;
  --cor-borda: #E5E7EB;
  --cor-texto-principal: #1F2937;
  --cor-texto-secundario: #6B7280;
  --cor-primaria: #3B82F6; /* Azul */
  --cor-primaria-hover: #2563EB;
  --cor-destaque: #EF4444; /* Vermelho para notificações */
  --cor-online: #10B981; /* Verde */

  --font-principal: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* --- Estilo Base e Container Principal --- */
.chat-app-container {
  display: flex;
  height: 100vh;
  background-color: var(--cor-fundo-app);
  font-family: var(--font-principal);
  color: var(--cor-texto-principal);
}

/* --- Barra Lateral (Sidebar) --- */
.sidebar {
  width: 30%;
  min-width: 320px;
  max-width: 400px;
  height: 100%;
  background-color: var(--cor-fundo-sidebar);
  border-right: 1px solid var(--cor-borda);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 1rem;
  border-bottom: 1px solid var(--cor-borda);
  position: sticky;
  top: 0;
  background-color: var(--cor-fundo-sidebar);
  z-index: 10;
}

.sidebar-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

.search-container {
  position: relative;
  margin-top: 1rem;
}

.search-input {
  width: 100%;
  padding: 0.5rem 0.5rem 0.5rem 2.5rem; /* Espaço para o ícone */
  border: 1px solid #D1D5DB;
  border-radius: 0.5rem;
  outline: none;
  transition: box-shadow 0.2s;
}
.search-input:focus {
  box-shadow: 0 0 0 2px var(--cor-primaria);
}

.search-icon {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--cor-texto-secundario);
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
}

.conversation-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
}

/* --- Item da Lista de Conversas --- */
.conversation-item {
  display: flex;
  align-items: center;
  padding: 0.75rem;
  cursor: pointer;
  border-radius: 0.5rem;
  transition: background-color 0.2s ease-in-out;
}

.conversation-item:hover {
  background-color: #F3F4F6;
}

.conversation-item.active {
  background-color: var(--cor-primaria);
  color: white;
}

.avatar {
  width: 3rem;
  height: 3rem;
  border-radius: 9999px;
  margin-right: 1rem;
}

.conversation-details {
  flex: 1;
  min-width: 0;
}

.conversation-header, .conversation-body {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.patient-name {
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.timestamp {
  font-size: 0.75rem;
  color: var(--cor-texto-secundario);
}
.conversation-item.active .timestamp {
  color: #D1D5DB;
}

.last-message {
  font-size: 0.875rem;
  color: var(--cor-texto-secundario);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: 0.5rem;
}
.conversation-item.active .last-message {
  color: #E5E7EB;
}

.unread-badge {
  background-color: var(--cor-destaque);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 9999px;
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* --- Janela Principal do Chat --- */
.main-chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-header {
  display: flex;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--cor-borda);
  background-color: var(--cor-fundo-sidebar);
}
.chat-patient-name {
  font-size: 1.125rem;
  font-weight: 700;
}
.chat-status {
  font-size: 0.875rem;
  color: var(--cor-online);
}

.messages-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  background-color: var(--cor-fundo-chat);
}

.message-footer {
  padding: 1rem;
  background-color: var(--cor-fundo-sidebar);
  border-top: 1px solid var(--cor-borda);
}

.message-form {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.message-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid #D1D5DB;
  border-radius: 9999px;
  outline: none;
  transition: box-shadow 0.2s;
}
.message-input:focus {
  box-shadow: 0 0 0 2px var(--cor-primaria);
}

.send-button {
  background-color: var(--cor-primaria);
  color: white;
  padding: 0.75rem;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}
.send-button:hover {
  background-color: var(--cor-primaria-hover);
}
.send-button:active {
  transform: scale(0.95);
}

.send-icon {
  width: 1.5rem;
  height: 1.5rem;
  transform: rotate(90deg);
}

/* --- Balões de Mensagem --- */
.message-container {
  display: flex;
  margin: 0.5rem 0;
}
.message-container.sent {
  justify-content: flex-end;
}
.message-container.received {
  justify-content: flex-start;
}

.message-bubble {
  max-width: 75%;
  padding: 0.75rem 1rem;
  border-radius: 1.25rem;
}
.message-text {
  font-size: 0.875rem;
}
.message-time {
  font-size: 0.75rem;
  text-align: right;
  margin-top: 0.25rem;
  opacity: 0.7;
}

.message-container.sent .message-bubble {
  background-color: var(--cor-primaria);
  color: white;
  border-bottom-right-radius: 0.25rem;
}

.message-container.received .message-bubble {
  background-color: #E5E7EB;
  color: var(--cor-texto-principal);
  border-bottom-left-radius: 0.25rem;
}

/* --- Estado Vazio --- */
.no-conversation-selected {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--cor-texto-secundario);
}

/* --- Responsividade --- */
@media (max-width: 768px) {
  .main-chat {
    display: none;
  }
  .sidebar {
    width: 100%;
    min-width: 100%;
    max-width: 100%;
  }
}