.upc3-chatbot * { box-sizing: border-box; font-family: inherit; }
.upc3-chatbot-shell { width: 360px; max-width: calc(100vw - 24px); background: #fff; border: 1px solid #d9dee5; border-radius: 18px; box-shadow: 0 12px 40px rgba(17,24,39,.18); overflow: hidden; }
.upc3-chatbot-header { padding: 14px 16px; font-weight: 700; background: #111827; color: #fff; }
.upc3-chatbot-messages { height: 360px; overflow: auto; padding: 14px; background: #f8fafc; }
.upc3-chatbot-message { margin: 0 0 12px 0; display: flex; }
.upc3-chatbot-message.user { justify-content: flex-end; }
.upc3-chatbot-bubble { max-width: 85%; padding: 10px 12px; border-radius: 14px; white-space: pre-wrap; line-height: 1.45; font-size: 14px; }
.upc3-chatbot-message.assistant .upc3-chatbot-bubble { background: #fff; border: 1px solid #e5e7eb; color: #111827; }
.upc3-chatbot-message.user .upc3-chatbot-bubble { background: #111827; color: #fff; }
.upc3-chatbot-form { display: flex; gap: 8px; padding: 12px; border-top: 1px solid #e5e7eb; background: #fff; }
.upc3-chatbot-form textarea { flex: 1; resize: none; min-height: 44px; max-height: 110px; border: 1px solid #d1d5db; border-radius: 12px; padding: 10px 12px; }
.upc3-chatbot-form button { border: 0; background: #111827; color: #fff; border-radius: 12px; padding: 0 14px; cursor: pointer; }
.upc3-floating { position: fixed; right: 18px; bottom: 18px; z-index: 999999; }
.upc3-chatbot-toggle { width: 58px; height: 58px; border-radius: 999px; background: #111827; color: #fff; display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: 0 12px 40px rgba(17,24,39,.25); }
.upc3-chatbot-panel { display: none; margin-bottom: 12px; }
.upc3-chatbot-panel.open { display: block; }
.upc3-shortcode .upc3-chatbot-shell { width: 100%; max-width: 760px; }
.upc3-typing { opacity: .7; font-style: italic; }
.upc3-chatbot-form button:hover, .upc3-chatbot-toggle:hover { background: #4b5563; }