.nsn-whatsapp-btn {
			position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 250;
			width: 56px; height: 56px; border-radius: 50%; background: #25D366;
			display: flex; align-items: center; justify-content: center;
			box-shadow: 0 2px 10px rgba(0,0,0,0.3); transition: transform 0.15s;
		}
		.nsn-whatsapp-btn:hover { transform: scale(1.06); }
		@media (max-width: 600px) {
			.nsn-whatsapp-btn { right: 1rem; bottom: 1rem; width: 50px; height: 50px; }
		}