body {
  font-family: Arial, sans-serif;
  background-color: #f3f3f3;
  margin: 0;
  padding: 20px;
}

#login-container, #chatbox {
  max-width: 600px;
  margin: 50px auto;
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

#login-container h3,
#chatbox h5 {
  text-align: center;
  margin-top: 0;
  color: #333;
}

.chat-window {
  height: 400px;
  overflow-y: auto;
  border: 1px solid #ddd;
  padding: 10px;
  background: #fafafa;
  margin-bottom: 10px;
  border-radius: 8px;
}

.chat-window p {
  margin: 10px 0;
  line-height: 1.4;
}

.chat-window img {
  vertical-align: middle;
  border-radius: 50%;
  margin-right: 10px;
}

input[type="text"] {
  width: 70%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
  outline: none;
}

button {
  padding: 10px 16px;
  border: none;
  background-color: #1a73e8;
  color: white;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: #155ab6;
}