body {
            margin: 0;
            padding: 0;
            font-family: Arial, sans-serif;
        }

        /* Floating Chat Icon */
        #chat-btn {
            position: fixed;
            bottom: 25px;
            right: 25px;
            width: 60px;
            height: 60px;
            background: #0078ff;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0px 4px 12px rgba(0,0,0,0.25);
            font-size: 28px;
            z-index: 9999;
        }

        /* Modal Background */
        #chat-modal-bg {
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.6);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 9998;
        }

        /* Chat Window */
        #chat-modal {
            width: 95%;
            max-width: 380px;
            height: 500px;
            background: white;
            border-radius: 12px;
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        #chat-header {
            padding: 12px;
            background: red;
            color: white;
            font-size: 18px;
            font-weight: bold;
        }

        #chat-body {
            flex: 1;
            padding: 12px;
            overflow-y: auto;
            font-size: 15px;
        }

        #chat-input-area {
            display: flex;
            border-top: 1px solid #ddd;
        }

        #chat-input {
            flex: 1;
            padding: 10px;
            border: none;
            outline: none;
            font-size: 15px;
        }

        #send-btn {
            padding: 0 16px;
            background: #0078ff;
            color: white;
            cursor: pointer;
            border: none;
        }

        /* -------------------------------- */
        /* FACEBOOK STYLE LOADING SKELETON */
        /* -------------------------------- */
        .skeleton {
            margin: 8px 0;
            padding: 12px;
            width: 70%;
            height: 20px;
            background: linear-gradient(90deg, #e0e0e0 0%, #f5f5f5 50%, #e0e0e0 100%);
            background-size: 200% 100%;
            border-radius: 8px;
            animation: skeleton-loading 1.3s infinite;
        }

        @keyframes skeleton-loading {
            0% { background-position: 200% 0; }
            100% { background-position: -200% 0; }
        }