div {
    width: 500px;
    border: 25px #0B9446;
    padding: 25px;
    margin: 25px;
    background-color: white;
    color: #CF1C44;
    font-size: 24px;
    } 
body {
    background: #FFFFFF;
    color: #545454;
    font-family: 'Sorts Mill Goudy', serif;
    font-size: 16px;
    line-height: 1.5;
    margin: 0 auto;
    max-width: 1000px;
    padding: 2em 2em 4em;
    }
ul  {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    border: 0;
    background-color: #0B9446; 
    }
li  {
    float: left;
    }
li a    {
    display: block;
    color: #FFFFFF;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    }
li a:hover:not(.active) {
    background-color: darkgreen;
    }

li a.active {
    color: white;
    background-color: #4CAF50;
    }
    h1, h2 {
        text-decoration: underline
    }
img     {
    max-width: 100%;
    }
footer  {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    max-height: 50px;
    max-width: 100px;
    font-size: 10px;
    }