<style>
#header {
    background-color: #A4A4A4;
    color: white;
    text-align: center;
    padding: 5px;
    height: 80px;
}
#nav {
    line-height: 30px;
    background-color: #eeeeee;
    height: 600px;
    width: 124px;
    float: left;
    padding: 5px; 
}
#section {
    padding: 5px;
    flex: 1;
    min-width: 0;
}
#footer {
    background-color: #A4A4A4;
    color: white;
    clear: both;
    text-align: center;
    padding: 5px 1rem;
    margin: 20px -1rem -1rem -1rem;
}
#content {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

input[type="text"]{
    border: 1px solid #aaaaaa
}

input[type="text"]:disabled {
    background-color: #dddddd;
}

select[multiple] {
    width: 75px;
}

input[type="checkbox"] {
  cursor: pointer;
}

</style>
<meta name="viewport" content="width=device-width, initial-scale=1">