body {
    background-color: black;
}

/* #navi {
    width: 100%;
    max-width: 1000px;
    height: 50px;
    margin: auto;
    text-align: center;
} */

ul {
    list-style-type: none;
    background-color: black;
}

li a {
    float: left;
    display: block;
    font-family: 'Courier New', Courier, monospace;
    color: whitesmoke;
    text-decoration: none;
    margin: auto;
    padding: 10px;
}

.active {
    color: yellow;
}

li a:hover {
    background-color: whitesmoke;
    color: black;

}

img {
    display: block;
    margin: auto;
    width: 100%;
    max-width: 1000px;
    height: auto;
    padding: 20px;
}

.header {
    font-family: 'Courier New', Courier, monospace;
    color: whitesmoke;
    text-align: center;
    padding: 20px;
}