body {
    background-color: rgb(175, 194, 28);
    text-align: center;
    font-size: larger;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #336699;
    padding: 10px 0;
    width: 100%;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    text-align: center;
}

nav ul li {
    padding: 10px 15px;
    display: inline-block;
    margin: 0 15px;
}

nav ul li a {
    padding: 20px 15px;
    color: white;
    text-decoration: none; font-weight: bold;
}

nav ul li a:hover {
    background-color: #ffffff;
    color: #336699;
}

section{
    margin-bottom:20px;
}