* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  background-color: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

#roomIdInput {
  text-align: center;
  margin-bottom: 20px;
}

#roomId {
  padding: 8px;
  width: 60%;
  margin-right: 10px;
  border-radius: 4px;
  border: 1px solid #ccc;
}

button {
  margin-top: 5px;
  padding: 8px 110px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #45a049;
}

#messages {
  border: 1px solid #ccc;
  padding: 10px;
  height: 150px;
  overflow-y: scroll;
  margin-bottom: 10px;
  border-radius: 4px;
  background-color: #fafafa;
}

#messageInput {
  width: 100%;
  padding: 8px;
  margin-right: 10px;
  border-radius: 4px;
  border: 1px solid #ccc;
}

#chatInterface {
  margin-top: 20px;
}

#chatInterface button {
  background-color: #f44336;
  margin-top: 10px;
  width: 100%;
}

#chatInterface button:hover {
  background-color: #e53935;
}