Use CSS variables for styles

[anhtran]

More easy to custom colors for dark theme for example.

.ct-toast {
	display: flex;
	justify-content: center;
	align-items: center;
	padding: 12px 20px;
	background-color: var(--cogo-bg-color);
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
	color: var(--cogo-text-color);
	border-radius: 4px;
	margin: 0px;
	opacity: 1;
	transition: 0.3s all ease-in-out;
	min-height: 45px;
	pointer-events: all;
}