body { font-family: Arial, sans-serif; background: #fafbfc; }
.container { max-width: 600px; margin: 40px auto; padding: 30px; background: #fff; border-radius: 8px; box-shadow: 0 4px 12px #eee; }
form { margin-bottom: 24px; }
input, textarea { width: 100%; margin-bottom: 8px; padding: 8px; border: 1px solid #ccc; border-radius: 4px; }
button { padding: 8px 16px; background: #1976d2; color: #fff; border: none; border-radius: 4px; cursor: pointer; }
button:hover { background: #145a99; }
.status { color: green; margin-bottom: 10px; }
.chat-box { border: 1px solid #eee; border-radius: 4px; padding: 12px; min-height: 70px; background: #fafbfc; }
.msg { margin: 6px 0; }
.msg.user { text-align: right; color: #1976d2; }
.msg.model { text-align: left; color: #444; }