* {
    margin: 0;
    padding: 0;
    text-align: center 
}

html {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url(bg.jpg);
    color: #fffefe;
    font-family: 'Arial', sans-serif;
    font-weight: 300;
    font-size: 20px;
 background-size: cover;
    background-position: center;
    height: 100vh;
    background-attachment: fixed;
    }