#whatsappButton {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 60px;
            height: 60px;
            background-color: #25D366;
            color: white;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: 0.3s;
            z-index: 1000;
        }

        #whatsappButton:hover {
            background-color: #128C7E;
            transform: scale(1.05);
        }

        #whatsappButton i {
            font-size: 28px;
        }

        /* Popup estilizado */
        .popup {
            display: none;
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 0 20px rgba(0,0,0,0.1);
            width: 320px;
            z-index: 1001;
            text-align: center;
        }

        .popup .logo {
            margin-bottom: 20px;
            max-width: 150px;
            border-radius: 8px;
        }

        .popup input {
            width: 100%;
            padding: 15px;
            margin: 10px 0;
            border: 1px solid #ddd;
            border-radius: 10px;
            font-size: 14px;
        }

        .popup button {
            width: 100%;
            padding: 15px;
            background: #25D366;
            border: none;
            border-radius: 10px;
            color: white;
            cursor: pointer;
            font-weight: bold;
            margin-top: 10px;
            transition: 0.3s;
        }

        .popup button:hover {
            background: #128C7E;
        }

        .success-message {
            text-align: center;
            padding: 20px;
            display: none;
            color: #25D366;
            font-weight: bold;
        }

        .close-btn {
            float: right;
            cursor: pointer;
            font-weight: bold;
            font-size: 20px;
            margin-top: -10px;
        }