body {
    background-color: lightblue;
}
h1 {
    color: navy;
    margin-left: 0px;
} 
h4 {
    background-color: lightblue;
    color: green;
}
h3 {
    background-color: lightblue;
    color: purple;
}
nav a:hover {
    color: #9cf3e7;
}
nav a {
    color: #333;
    text-decoration: none;
    padding: 10px;
    font-weight: bold;
}
header {
    background-color: lightblue;
    color: white;
    padding: 20px;
    text-align: center;
    border-left: 100px;}