Checkmate/client/src/Components/Buttons/RoundGradientButton.jsx

import React from "react";
import Button from "@mui/material/Button";
import { styled } from "@mui/material/styles";

const RoundGradientButton = styled(Button)(({ theme }) => ({
	position: "relative",
	border: "5px solid transparent",
	backgroundClip: "padding-box",
	borderRadius: 30,
	fontSize: "1.2rem",
	color: theme.palette.primary.contrastText,
	backgroundColor: theme.palette.background.main,

	"&:after": {
		position: "absolute",
		top: -3,
		left: -3,
		right: -3,
		bottom: -3,
		background:
			theme.palette.mode === "dark"
				? "linear-gradient(90deg, #842bd2, #ff5451, #8c52ff)"
				: "linear-gradient(90deg, #842bd2, #ff5451, #8c52ff)",
		content: '""',
		zIndex: -1,
		borderRadius: 30,
	},
}));

export default RoundGradientButton;