/* Chatknop rechtsonder: gaat na 15 seconden zacht gloeien (Beweging-en-interactie-overzicht.pdf) */
.f4s-chatknop img {
    animation: f4s-chatknop-gloed 2.4s ease-in-out 15s infinite;
    transition: transform .2s ease;
}
.f4s-chatknop a:hover img,
.f4s-chatknop a:focus-visible img {
    transform: scale(1.06);
}
@keyframes f4s-chatknop-gloed {
    0%, 100% { filter: drop-shadow(0 0 0 rgba(255, 146, 34, 0)); }
    50% { filter: drop-shadow(0 0 14px rgba(255, 146, 34, .85)); }
}
@media (prefers-reduced-motion: reduce) {
    .f4s-chatknop img { animation: none; transition: none; }
}