.whatsapp-button {
        position: fixed;
        bottom: 20px;
        right: 20px;
        width: 60px;
        height: 60px;
        background-color: #25D366;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 10px rgba(0,0,0,0.3);
        z-index: 9999;
        text-decoration: none;
        /* iOS safe area ondersteuning */
        padding-bottom: env(safe-area-inset-bottom);

        transform: translateZ(0);
        will-change: transform;
    }

    .whatsapp-button img {
        width: 32px;
        height: 32px;
    }

    .whatsapp-button:hover {
        background-color: #1ebe5d;
    }