body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #f0f2f5;
  height: 100vh;
}

h2 {
  text-align: center;
}

#messages {
  flex: 1;
  padding: 10px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.message {
  max-width: 70%;
  margin: 5px 0;
  padding: 10px;
  border-radius: 10px;
  word-wrap: break-word;
}

.sent {
  align-self: flex-start;
  background-color: #dcf8c6;
}

.received {
  align-self: flex-end;
  background-color: #ece5dd;
}

#input-container {
  display: flex;
  padding: 10px;
  gap: 5px;
  border-top: 1px solid #ccc;
  background-color: #fff;
}

#message-input {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  outline: none;
}

#send-btn {
  padding: 10px 20px;
  background-color: #25d366;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}