
<style>
.curs {
    background: white;
    padding: 15px;
    border-radius: 15px;
    width: 500;
    height: 250;
    }
    body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #4d8cca;
    }
    </style>
    <link rel="stylesheet" href="Estil.css">
    