body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f5f5;
}
#chatbox {
  background: white;
  box-shadow: 0 0 10px #ccc;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid #e0e0e0;
}
#chat-header {
  background: #007aff;
  color: white;
  padding: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#chat-header span {
  font-weight: bold;
}
#chat-header button {
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: underline;
}
#chat {
  padding: 10px;
  display: flex;
  flex-direction: column;
  height: 200px;
  overflow-y: auto;
}
#usernameBox {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
#usernameBox input {
  padding: 8px;
  font-size: 1rem;
  border-radius: 5px;
  border: 1px solid #ccc;
}
#usernameBox button {
  padding: 8px;
  font-size: 1rem;
  background: #007aff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
#controls {
  display: flex;
  padding: 10px;
  gap: 5px;
  border-top: 1px solid #eee;
}
#controls input {
  padding: 8px;
  font-size: 1rem;
  border-radius: 5px;
  border: 1px solid #ccc;
  flex: 1;
}
#sendBtn {
  padding: 8px 12px;
  font-size: 1rem;
  border: none;
  background: #007aff;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}
.msg-you {
  align-self: flex-end;
  background: #dcf8c6;
  padding: 8px 12px;
  border-radius: 10px;
  margin: 4px 0;
  max-width: 80%;
}
.msg-bot {
  align-self: flex-start;
  background: #f1f0f0;
  padding: 8px 12px;
  border-radius: 10px;
  margin: 4px 0;
  max-width: 80%;
}