* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    height: 100%;
    width: 100%;
}

.background {
    height: 100vh; 
    width: 100vw; 
    background-image: url('img/pronto.jpg'); 
    background-size: cover; 
    background-position: center; 
    background-repeat: no-repeat; 
}