h1, p {text-align: center; }

body {
    margin: 0px;
    min-height: 100vh;
    display: grid;
    grid-template-rows: 2fr 4fr auto;
    background-image: url('sae.jpg');
    background-size:cover;
    font-family: 'Arial';
}

header h1 { font-family: 'Courier'; font-size: 350%; }

main p { font-size: 130%;  }

footer p { font-size: 90%; }