JSFiddle - React, Tailwind, and code Playground

HTML

<form class="form">
					<input class="email" type="email" placeholder="Email Address"required>
					<input class="submit" type="submit" value="Notify">
				</form>

CSS

* {
	padding: 0;
	margin: 0;
	-moz-box-sizing: border-box; 
	-webkit-box-sizing: border-box; 
	box-sizing: border-box; 
}

.email {
	width: 305px;
	height: 55px;
	text-indent: 25px;
	border: 1px solid #c8c8c8;
	border-radius: 15px 0 0 15px;
	font-family: HelveticaNeue, sans-serif;
	font-size: 16px;
}

.email:focus, .submit:focus  {
	outline-width: 0;
}

.submit {
	border-style: none;
	border-radius: 0 15px 15px 0;
	background-color: #2ecc71;
	width: 140px;
	height: 55px;
	color: #fff;
	font-family: 'Raleway', sans-serif;
	font-size: 22px;
	cursor: pointer;
	float:right;
}
.form {
	width: 445px; 
}