/* main */
body {
    background-color: #000;
    margin: 0;
}

article {
    background-color: #fffff0;
}

nav, main, footer div {
    max-width: 720px;
    margin: 0 auto;
}

main {
    padding: 10px 20px;
    border-radius: 4px;
    background-color: #fffff7;
    box-shadow: 0 0 10px #eee;
}

/* navigation */
nav.sections {
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
}

nav.sections ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    margin-bottom: 8px;
}

nav.sections li {
    font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
    display: inline;
    margin: 0 -2px;
    font-size: 1.3em;
}

nav.sections .left a {
    color: #666;
    border-bottom: solid 2px #A8A8A8;
    padding: 0 16px;
}

nav.sections .left a.selected, nav.sections .left a:hover {
    color: #000000;
    border-bottom: solid 2px #444444;
}

nav.sections img {
    margin: 0 4px;
}

.left {
    justify-self: flex-start;
}

.right {
    justify-self: flex-end;
}

/* footer */
footer {
    margin-top: 32px;
    min-height: 64px;
    background: linear-gradient(#fffff0, #ccccc0);
}

footer p {
    font-style: italic;
    color: #666;
    font-family: serif;
}

footer img {
    display: inline-block;
    vertical-align: middle;
}

.abyss {
    text-align: center;
}

/* headers */
h1, h2 {
    font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
    font-size: 200%;
    font-weight: lighter;
    text-transform: capitalize;
    padding-bottom: 10px;
    border-bottom: 1px solid #000;
    text-align: center;
}

h1.title {
    text-align: center;
    font-family: serif;
    font-size: 2.5em;
    font-weight: lighter;
    font-variant-caps: small-caps;
    border-bottom: 4px double #000;
}

h3 {
    font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
    font-size: larger;
    font-weight: lighter;
    text-decoration: underline;
}

h1:not(.title):hover .anchor, h2:hover .anchor, h3:hover .anchor, h4:hover .anchor, h5:hover .anchor, h6:hover .anchor {
    opacity: 1;
}

.anchor {
    float: left;
    padding-right: 0.4ch;
    margin-left: -1.3ch;
    opacity: 0;
    transition: opacity 150ms;
}

/* body */
p, li, dl, summary {
    font-family: Tahoma, Geneva, sans-serif;
    font-size: 1.1em;
    line-height: 1.5;
}

img {
    max-width: 100%;
}

.dim {
    color: #999;
    font-size: smaller;
}

a {
    text-decoration: none;
    color: #c74727;
    border-bottom: 0 dashed rgba(0, 0, 0, 0);
    transition: color 300ms, border-bottom 300ms;
}

a:hover {
    color: #b73717;
    border-bottom: 1px solid #b73717;
}

blockquote {
    border-left: 4px solid #000;
    padding-left: 8px;
    font-style: italic;
    color: #444;
}

.footnote-definition:target {
    background-color: rgba(255, 255, 0, 0.2);
}

dl img {
    margin-bottom: -0.4em;
    margin-right: 0.6em;
}

dd {
    margin-bottom: 1em;
}

div.time {
    text-align: right;
    font-style: italic;
    color: #777;
    font-size: 0.9em;
}

div.time p {
    line-height: 0.5;
}

hr {
    border: 0;
    border-bottom: 2px dashed #aaa;
}

sub {
    font-size: small;
}

/* code */
code {
    font-weight: bold;
    font-size: large;
    background-color: #f7f7f0;
    white-space: pre;
}

pre code {
    font-weight: normal;
    font-size: 1em;
    background: none;
}

pre {
    background-color: #eee;
    padding: 4px;
    overflow: auto;
    max-height: 480px;
}

kbd {
    padding: 3px 5px;
    font: 0.9em monospace;
    color: #333;
    background-color: #fafafa;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-shadow: 0 2px 0 #ddd;
}

/* tables */
table {
    border-collapse: collapse;
}

th {
    background-color: #f7f7e8;
}

th, td {
    padding: 0.5em;
    border: 1px solid #aaa;
}

tr:nth-child(even) {
    background-color: #f7f7e8;
}

/* graphs post */
div.matrix table {
    border-width: 0 2pt 0 2pt;
    border-style: solid;
    border-color: #000;
}

/* poor man's matrix */
div.matrix tr:first-child td:first-child, div.matrix tr:first-child td:last-child {
    border-top: 2pt solid #000;
}

div.matrix tr:last-child td:first-child, div.matrix tr:last-child td:last-child {
    border-bottom: 2pt solid #000;
}

div.matrix td {
    border: none;
}

em.math {
    font-family: 'Times New Roman', Times, serif;
    font-size: larger;
}

/* special */
::-moz-selection {
    background-color: #FFAA00;
    color: #000000;
}

::selection {
    background-color: #FFAA00;
    color: #000000;
}