a {
    text-decoration: none;
    color: black;
}

a:hover {
    background-color: #f1f1f1;
    padding: 5px;
}

ul {
    padding-left: 5em;
}

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

.collapsible {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
}

/* Add a background color to the button if it is clicked on (add the .active class with JS), and when you move the mouse over it (hover) */
.active,
.collapsible:hover {
    background-color: #ccc;
}

/* Style the collapsible content. Note: hidden by default */
.content {
    padding: 0 18px;
    display: none;
    overflow: hidden;
    background-color: #f1f1f1;
    padding-left: 5em;

}

.lower-active {
    background-color: #ccc;
}

.high-level {
    font-size: large;
    font-weight: bold;
    color: #007a99;
}