body {
  font-family: sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 0;
  direction: rtl;
}

.chat-container {
  max-width: 600px;
  margin: 50px auto;
  background: white;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  overflow: hidden;
}

.chat-header {
  background: #222;
  color: white;
  padding: 15px;
  text-align: center;
  font-size: 18px;
}

.chat-box {
  padding: 20px;
  max-height: 400px;
  overflow-y: auto;
  direction: rtl;
}

.message {
  margin: 10px 0;
  padding: 10px 15px;
  border-radius: 10px;
  line-height: 1.6;
}

.message.bot {
  background: #eee;
  text-align: right;
}

.message.user {
  background: #d1e7dd;
  text-align: left;
}

form {
  display: flex;
  border-top: 1px solid #ddd;
}

form input {
  flex: 1;
  padding: 15px;
  border: none;
  font-size: 16px;
}

form button {
  background: #25D366;
  color: white;
  border: none;
  padding: 0 20px;
  font-size: 16px;
  cursor: pointer;
}