body {
    font-family: sans-serif;
}

img {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

ol > li::marker {
    font-weight: bold;
}

nav ul {
    background-color: black;
    list-style-type: none;
    margin: 0;
    overflow: hidden;
    padding: 0;
    position: relative;
}

nav ul li {
    float: left;
    font-size: large;
}

nav ul li a {
    color: white;
    display: block;
    font-weight: bold;
    padding: 14px 16px;
    text-decoration: none;
}

table {
    border-collapse: collapse;
    width: 50%;
}

td, th {
    border: 1px solid black;
    text-align: left;
    padding: 8px;
}

th {
    background-color: lightgray;
}

#nav-center {
    left: 50%;
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
}

#nav-center li a {
    font-size: x-large;
    font-style: italic;
}

#nav-right {
    float: right;
}

#nav-active, nav ul li a:hover {
    background-image: url("media/fire.gif");
    background-size: 100px;
}

#content {
    font-size: large;
    padding-left: 5%;
    padding-right: 5%;
}

#content h1 {
    text-align: center;
}