html {
    font-family: 'Helvetica', 'Arial', sans-serif;
}

body {
    margin: auto;
    text-align: center;
}

header {
    min-width: 1100px;
    height: 90px;
    background-color: #333;
}

header ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

header ul li {
    float: left;
    height: 90px;
}

header ul li a {
    display: flex;
    color: white;
    text-align: center;
    padding: 0px 16px;
    align-content: center;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-decoration: none;
}

header ul li a:hover {
    background-color: #111;
}

header h1 {
    float: left;
    height: 100%;
    width: 34%;
    color: white;
}

.link_icon {
    height: 34px;
    width: 34px;
}

#internal_links {
    float: left;
    width: 50%;
}

#external_links {
    float: right;
    width: 16%;
}