#chat-widget {
            position: fixed;
            bottom: 20px;
            right: 35px;
            z-index: 9999;
        }

        #chat-toggle-btn {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: #2563eb;
            color: white;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 26px;
        }

        #chat-container {
            display: none;
            position: fixed;
            bottom: 90px;
            right: 35px;
            width: 380px;
            height: 580px;
            z-index: 9998;
        }

        #chat-iframe {
            width: 100%;
            height: 100%;
            border: none;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        #chat-close-btn {
            position: absolute;
            top: 0px;
            right: 0px;
            background-color: burlywood;
            color: white;
            border: none;
            border-radius: 50%;
            width: 28px;
            height: 28px;
            /* font-size: 16px; */
            cursor: pointer;
            z-index: 10000;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        @media (max-width: 480px) {
            #chat-container {
                width: 90%;
                height: 80%;
                bottom: 80px;
                right: 5%;
                z-index: 9999;
            }

            #chat-widget {
                right: 15px;
            }
        }
        
        /* Lớp che footer */
        #chat-footer-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            height: 50px; /* chỉnh theo chiều cao footer Chatbase */
            width: 100%;
            background: white;
            z-index: 10;
            pointer-events: none;
        }