.chat-container { position: fixed; bottom: 20px; right: 20px; z-index: 1000; font-family: Arial, sans-serif; }
.chat-box { display: none; flex-direction: column; width: 300px; height: 400px; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.2); }
.chat-header { padding: 8px 10px; background: #1976d2; color: #fff; border-bottom: 1px solid #ddd; border-top-left-radius: 8px; border-top-right-radius: 8px; display: flex; justify-content: space-between; align-items: center; font-size: 14px; }
.chat-messages { flex: 1; padding: 10px; overflow-y: auto; font-size: 12px; }
.chat-msg { margin-bottom: 5px; word-break: break-word; }
.chat-msg.own { text-align: right; color: #1976d2; }
.chat-msg.other { text-align: left; color: #333; }
.chat-sender { font-weight: bold; }
.chat-input-area { display: flex; padding: 8px; border-top: 1px solid #eee; gap: 5px; }
#chatInput { flex: 1; padding: 6px; border: 1px solid #ccc; border-radius: 4px; font-size: 12px; }
#chatSendBtn, #chatCloseBtn { padding: 6px 10px; border: none; border-radius: 4px; cursor: pointer; background: #1976d2; color: #fff; font-size: 12px; }
#chatCloseBtn { background: #f44336; }
.chat-toggle-btn { width: 50px; height: 50px; border-radius: 50%; background: #1976d2; color: #fff; font-size: 24px; border: none; cursor: pointer; box-shadow: 0 2px 8px rgba(0,0,0,0.2); }