.mwb-btn {
	position: fixed;
	bottom: 22px;
	z-index: 99999;
	width: 58px;
	height: 58px;
	border-radius: 50%;
	background: #25d366;
	display: flex;
	align-items: center;
	justify-content: center;
	box-shadow: 0 4px 12px rgba(0,0,0,.25);
	text-decoration: none;
	animation: mwb-pulse 2.2s infinite;
}
.mwb-btn:hover {
	background: #1ebe5b;
}
.mwb-pos-right {
	right: 22px;
}
.mwb-pos-left {
	left: 22px;
}

.mwb-bubble {
	position: absolute;
	bottom: 50%;
	transform: translateY(50%);
	background: #fff;
	color: #222;
	padding: 8px 14px;
	border-radius: 20px;
	box-shadow: 0 2px 8px rgba(0,0,0,.15);
	font-size: 13px;
	white-space: nowrap;
	font-family: -apple-system, sans-serif;
}
.mwb-pos-right .mwb-bubble {
	right: 68px;
}
.mwb-pos-left .mwb-bubble {
	left: 68px;
}

@keyframes mwb-pulse {
	0% { box-shadow: 0 4px 12px rgba(37,211,102,.4); }
	50% { box-shadow: 0 4px 20px rgba(37,211,102,.7); }
	100% { box-shadow: 0 4px 12px rgba(37,211,102,.4); }
}

@media (max-width: 480px) {
	.mwb-btn {
		width: 50px;
		height: 50px;
		bottom: 16px;
	}
	.mwb-pos-right { right: 16px; }
	.mwb-pos-left { left: 16px; }
	.mwb-bubble { display: none; }
}