JSFiddle - React, Tailwind, and code Playground

HTML

<form action="update.php" method="post">
	<input type="text" name="titol" value="Title post" class="title">
    <input type="submit" name= "actualitzar" value="Submit" class="submit">
</form>

CSS

form {
	margin: 40px auto;
	width: 80%; max-width: 600px; min-width: 300px;
	background-color: aliceblue;
}

.title {
	width: 100%;
	font-family: Arial, Helvetica, sans-serif;
	font-size:40px; line-height:40px;
	letter-spacing: 1px;
	margin:10px 0; padding: 20px;
}