body {margin: 0;}

ul {
    font-family: sans-serif;
}

ul.sidenav {
    list-style-type: none;
    margin: 0;
    padding: 0;
    width: 20%;
    background-color: #FFFDD0;
    position: fixed;
    height: 100%;
    overflow: auto;
}

ul.sidenav li a {
    display: block;
    color: #000;
    padding: 8px 16px;
    text-decoration: none;
}
 
ul.sidenav li a.active {
    background-color: #DC143C;
    color: white;
}

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

div.content {
    font-family: sans-serif;
    margin-left: 21%;
    padding: 1px 16px;
    height: 1000px;
}

table, th, td {
    border: 1px solid black;
    border-collapse: collapse;
    padding: 5px;
}

tr:nth-child(even) {
    background-color: #dddddd;
}

p {
    display: block;
    margin-top: 1em;
    margin-bottom: 1em;
    margin-left: 0;
    margin-right: 0;
}

@media screen and (max-width: 900px) {
    ul.sidenav {
        width: 100%;
        height: auto;
        position: relative;
    }
    ul.sidenav li a {
        float: left;
        padding: 15px;
    }
    div.content {margin-left: 0;}
}

@media screen and (max-width: 400px) {
    ul.sidenav li a {
        text-align: center;
        float: none;
    }
}