  
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            height: 2000px; /* Just to make the page scrollable for demo */
        }
        
        #whatsapp-button {
            position: fixed;
            right: -100px; /* Start off-screen */
            top: 50%;
            transform: translateY(-50%);
            width: 60px;
            height: 60px;
            background-color: #25D366;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            transition: right 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55);
            z-index: 1000;
        }
        
        #whatsapp-button:hover {
            background-color: #128C7E;
        }
        
        #whatsapp-button.visible {
            right: 20px;
        }
        
        #whatsapp-button img {
            width: 36px;
            height: 36px;
        }
        
        .close-btn {
            position: absolute;
            top: -10px;
            right: -10px;
            width: 24px;
            height: 24px;
            background-color: white;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-weight: bold;
            font-size: 14px;
            color: #25D366;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            z-index: 1001;
        }
        
        #whatsapp-link {
            display: flex;
            width: 100%;
            height: 100%;
            justify-content: center;
            align-items: center;
        }
    </style>
  


