<!DOCTYPE html>

<html lang="pt-BR">

<head>

<meta charset="UTF-8">

<meta name="viewport" content="width=device-width, initial-scale=1.0">

<title>Botão Vermelho</title>

<style>

body {

display: flex;

justify-content: center;

align-items: center;

height: 100vh;

margin: 0;

background-color: #f0f0f0;

}

button {

background-color: red;

color: white;

padding: 12px 24px;

font-size: 16px;

border: none;

border-radius: 4px;

cursor: pointer;

}

</style>

</head>

<body>

<button>Botão Vermelho</button>

</body>

</html>