index.html

<!DOCTYPE html>
<html>
<head>
    <title>W3.CSS Template</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Raleway">
    <link rel="stylesheet" href="css/pronto.css">
</head>

<body>

<div class="bgimg w3-display-container w3-animate-opacity w3-text-white">
    <div class="w3-display-topleft w3-padding-large w3-xlarge">
        <img src="/img/escudo.svg" alt="Escudo de Lalín" style="width:50px">
    </div>

    <div class="w3-display-middle">
        <h1 class="w3-jumbo w3-animate-top">EN DESARROLLO</h1>
        <hr class="w3-border-grey" style="margin:auto;width:40%">
        <p class="w3-large w3-center">Disponible pronto</p>
    </div>
</div>

</body>
</html>