body {
  font-family: Arial, sans-serif;
  background-color: #aaf8f8;
  max-width: 600px;
  margin: 40px auto;
  padding: 20px;
}

h1 {
  text-align: center;
}

#messages {
  background-color: white;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 15px;
  height: 300px;
  overflow-y: auto;
  margin-bottom: 15px;
}

#messages p {
  background-color: #f0f0f0;
  padding: 10px;
  border-radius: 6px;
  margin: 8px 0;
}

#usernameInput,
#messageInput {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-sizing: border-box;
}

#usernameInput {
  width: 100%;
  margin-bottom: 10px;
}

#messageInput {
  width: 80%;
}

#sendButton {
  padding: 10px 15px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}