.settings-link {
    float: right;
}

.disabled-links {
    cursor: not-allowed;
    opacity: 0.5;
}

.disabled-links > a {
    color: currentColor;
    display: inline-block;  /* For IE11/ MS Edge bug */
    pointer-events: none;
    text-decoration: none;
}

.topnav {
    overflow: hidden;
    background-color: #333;
}

.topnav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
}

.topnav a:hover {
    background-color: #ddd;
    color: black;
}

.topnav a.active {
    background-color: #4CAF50;
    color: white;
}