body {
    margin: 0;
    font-family: Verdana;
    font-size: small;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    width: 20%;
    background-color: #f1f1f1;
    position: fixed;
    height: 100%;
    overflow: auto;
    border: 1px solid #555;
}

li a {
    display: block;
    color: #000;
    padding: 8px 16px;
    text-decoration: none;
}

li a.active {
    background-color: #04AA6D;
    color: white;
}

li a:hover:not(.active) {
    background-color: #555;
    color: white;
}

.btn {
    border-radius: 4px;
}

@media print {
    @page {
        margin-top: 0;
        margin-bottom: 0;
    }
    body {
        padding-top: 72px;
        padding-bottom: 72px;
    }
}