index.html

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<link rel="icon" type="image/svg+xml" href="/vite.svg" />
		<title>Signals</title>
		<style>
			body {
				height: 100svh;
				display: grid;
				place-content: center;
				margin: 0px;
				font-family: 'Monaspace Neon', monospace;
				color: #fff;
				background-color: #1b1e28;
			}

			button {
				padding: 1.4rem 2rem;
				font: inherit;
				font-size: 2rem;
				font-weight: 500;
				color: #011212;
				background-color: #00eceb;
				border: none;
				border-top: 1px solid #00fffe;
				border-radius: 4px;
				box-shadow: 0px 0px 10px #000;
				cursor: pointer;
			}
		</style>
	</head>
	<body>
		<button>0</button>
		<script type="module" src="/main.js"></script>
	</body>
</html>