html {
    color-scheme: light dark;
    background-image: url("../images/background.jpg");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

body {
    max-width: 35em;
    margin: 0 auto;
    padding: 30px 20px;
    font-family: Tahoma, Verdana, Arial, sans-serif;
    line-height: 1.5;
}

img {
	margin-bottom: 20px;
	display: block;
    	margin: 0 auto 20px auto;
}

h1 {
    margin-top: 0;
}

nav {
    margin-bottom: 100px;
    background: red;
}