* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

.clear::after {
    clear: both;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
}

header {
    background-color: black;
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
}

header .ddf-logo {
    font-family: Arial Narrow, Arial, Helvetica, sans-serif;
    font-size: 300%;
    font-weight: bold;
    margin: 5px 10px;
}

header .ddf-title {
    color: white;
    font-size: 130%;
    font-style: italic;
    margin-left: 15px;
    display: flex;
    justify-content: center;
    flex-direction: column;
}

div.main {
    margin-top: 80px;
    margin-left: 20px;
    margin-right: 20px;
}

footer {
    background-color: black;
    color: white;
    font-style: italic;
    padding: 10px 20px;
    margin-top: 100px;
}

footer a, footer a:hover {
    color: white;
}

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

a:hover {
    color: blue;
}

table, table th, table td {
    border: 1pt gray solid;
    border-collapse: collapse;
}

table td {
    padding: 3px;
}

table tr {
    background-color: white;
}

table.list thead tr {
    background-color: wheat;
    font-weight: bold;
}

table.list tr.available {
    background-color: #E2F5EC;
}

table.list tr:hover {
    background-color: #C5E2E2;
}

table.details {
    margin-top: 20px;
}

table.details tr td:first-child {
    font-weight: bold;
}

dl {
    line-height: 170%;
    margin-top: 20px;
}

dt {
    float: left;
    clear: left;
    width: 100px;
}

div.scroll-h {
    overflow: auto;
}

table.books-per-author th {
    transform: rotate(300deg);
}
table.books-per-author tr:hover {
    background-color: #C5E2E2;
}

table.books-per-author .books-per-author-0 {
    color: rgb(231, 231, 231);
}

table.books-per-author .books-per-author {
    text-align: center;
}
table.books-per-author .books-per-author-1 {
    color: rgb(33, 139, 180);
    background-color: rgb(201, 229, 240);
}
table.books-per-author .books-per-author-2 {
    color: rgb(0, 40, 56);
    background-color: rgb(123, 201, 231);
}
table.books-per-author .books-per-author-3 {
    color: white;
    background-color: rgb(33, 139, 180);
}
table.books-per-author .books-per-author-4 {
    color: white;
    background-color: rgb(0, 108, 151);
}
table.books-per-author .books-per-author-5 {
    color: white;
    background-color: rgb(0, 79, 110);
}
table.books-per-author .books-per-author-6 {
    color: white;
    background-color: rgb(0, 40, 56);
}