body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f1f1f1;
}

.chat-container {
  max-width: 1000px;
  width: 80%;
  margin: 40px auto;
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

#chat {
  min-height: 300px;
  margin-bottom: 20px;
  white-space: pre-wrap;
}

#input-container {
  display: flex;
  flex-direction: row;
  gap: 10px;
  align-items: center;
}

#resposta {
  flex: 1;
  padding: 10px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

#btn-avancar {
  padding: 10px 15px;
  background-color: #004aad;
  color: white;
  border: none;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
}

#btn-avancar.hidden {
  display: none;
}

.option-button {
  display: inline-block;
  background: #e0e0e0;
  border: none;
  border-radius: 5px;
  padding: 8px 12px;
  margin: 5px;
  cursor: pointer;
  transition: background 0.3s;
}

.option-button:hover {
  background: #cfcfcf;
}

.option-button.selected {
  background: #004aad;
  color: white;
}

@media (max-width: 600px) {
  .chat-container {
    width: 95%;
    margin: 20px auto;
  }

  #input-container {
    flex-direction: column;
    align-items: stretch;
  }

  #btn-avancar {
    width: 100%;
  }
}