html {
    font-family: Arial, Helvetica, sans-serif;
    background-color: black;
    color: white;
}

#container {
    width: 900px;
    height: 755px;
    margin: auto;
}

#header {
    padding: 5px;
    border: 1px white solid;
    background-color: rgb(0, 0, 0);
}

#nav {
    text-align: center;
    border: 1px white solid;
    list-style-type: none;
    padding: 5px;
}

#nav li {
    display: inline;
    padding: 4px;
}

a {
    color: white;
}

a:hover {
    color: grey;
}

hr {
    border: 1px solid;
}

#main {
    display: flex;
}

#main-content {
    width: 650px;
    height: 650px;
    padding: 5px;
    border: 1px white solid;
    overflow: auto;
}

#other-content {
    margin-left: 17px;
    width: 210px;
    height: 650px;
    padding: 5px;
    border: 1px white solid;
    overflow: auto;
}

#footer {
    margin-top: 15px;
    padding: 5px;
    border: 1px white solid;
}