@charset "UTF-8";
body, h1, h2, h3, h4, p, blockquote, code, ul, ol, dl, dd, img {
  margin: 0;
}

img {
  outline: none;
}

img.arrow {
  width: auto;
  height: 11px;
}

img.dot {
  width: auto;
  height: 18px;
  vertical-align: text-bottom;
}

body {
  color: #2c3e50;
  font: normal 0.95rem -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  line-height: 1.7;
}

article.chapter {
  position: relative;
}

article.chapter h2 {
  font: 1.5rem -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  font-weight: 600;
  line-height: 1.7;
  margin: 35px 0 35px 0;
  padding-bottom: 3px;
}

article.chapter h2 small {
  font: 800 1rem -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  line-height: 1.7;
  float: right;
}

article.chapter h3 {
  font: 1.3rem -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  font-weight: 600;
  line-height: 1.7;
  margin: 35px 0 35px 0;
  padding-bottom: 3px;
}

article.chapter h3 small {
  font: 600 1rem -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  line-height: 1.7;
  float: right;
}

article.chapter h2 a, article.chapter h3 a {
  color: #222;
  border-bottom: none;
}

article.chapter h2 a:hover, article.chapter h3 a:hover {
  border-bottom: none;
  color: inherit;
}

article.chapter h2 a::before, article.chapter h3 a::before {
  position: absolute;
  left: -48px;
  width: 48px;
  content: "\000A7";
  color: #fff;
  transition: color 0.2s ease;
  text-align: center;
}

article.chapter h2 a:hover::before, article.chapter h3 a:hover::before {
  color: #ddd;
}

article.chapter .challenges, article.chapter .design-note {
  border-radius: 2px;
  padding: 12px;
  margin: -2px -12px 12px -12px;
  font: normal 0.9975rem/12px "Source Sans Pro", sans-serif;
  color: #444;
}

article.chapter .challenges h2, article.chapter .design-note h2 {
  margin: 0 -12px 0;
  padding: 0;
  font: 600 0.9975rem/12px "Source Sans Pro", sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
}

article.chapter .challenges h2 a, article.chapter .design-note h2 a {
  color: inherit;
}

article.chapter .challenges h2 a::before, article.chapter .design-note h2 a::before {
  content: none;
}

article.chapter .challenges ol, article.chapter .design-note ol {
  padding: 0 0 0 18px;
}

article.chapter .challenges ol li, article.chapter .design-note ol li {
  padding: 0 0 0 6px;
  font-weight: 600;
}

article.chapter .challenges ol li p, article.chapter .design-note ol li p {
  font-weight: 400;
}

article.chapter .challenges pre, article.chapter .design-note pre {
  margin: 0;
}

article.chapter .challenges > blockquote p, article.chapter .design-note > blockquote p {
  margin: 0 24px;
  font: italic 0.9975rem/12px "Source Sans Pro", sans-serif;
  color: #444;
}

article.chapter .challenges > blockquote::before, article.chapter .challenges > blockquote::after, article.chapter .design-note > blockquote::before, article.chapter .design-note > blockquote::after {
  content: none;
}

article.chapter .challenges aside code, article.chapter .challenges aside .codehilite, article.chapter .design-note aside code, article.chapter .design-note aside .codehilite {
  color: #595959;
  background: #faf8f5;
}

article.chapter .challenges *:last-child, article.chapter .design-note *:last-child {
  margin-bottom: 0;
}

article.chapter .challenges .codehilite,
article.chapter .design-note .codehilite {
  margin: -12px 0 -12px 0;
}

article.chapter .challenges {
  background: #eef4f7;
}

article.chapter .challenges code, article.chapter .challenges .codehilite {
  background: #e4eef1;
}

article.chapter .design-note {
  background: #f6f8f2;
}

article.chapter .design-note code, article.chapter .design-note .codehilite {
  background: #eef1ea;
}

article.chapter table {
  width: 100%;
  border-collapse: collapse;
}

article.chapter table thead {
  font: 700 15px -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
}

article.chapter table td {
  border-bottom: solid 1px #dee9ed;
  line-height: 1.7;
  padding: 3px 0 0 0;
  margin: 0;
}

article.chapter table td + td {
  padding-left: 12px;
}

article.chapter .toc-toggle {
  position: fixed;
  top: 100px;
  right: 24px;
  z-index: 100;
  background: transparent;
  border: none;
  padding: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  color: #666;
  transition: color 0.2s ease;
  letter-spacing: 0.5px;
}

article.chapter .toc-toggle:hover {
  color: #0066cc;
}

article.chapter .table-of-contents {
  position: fixed;
  top: 140px;
  right: 24px;
  width: 210px;
  max-height: 55vh;
  background: #fff;
  border: solid 0.5px #ddd;
  border-radius: 4px;
  box-shadow: none;
  overflow-y: auto;
  z-index: 99;
  display: none;
  padding: 0;
  font-family: "Source Sans Pro", sans-serif;
}

article.chapter .table-of-contents.active {
  display: block;
}

article.chapter .table-of-contents ul {
  list-style: none;
  padding: 0;
  margin: 8px 0;
  border-bottom: none;
  border-top: none;
}

article.chapter .table-of-contents li {
  margin: 2px 0;
  line-height: 1.5;
}

article.chapter .table-of-contents a {
  display: block;
  padding: 4px 8px;
  color: #555;
  text-decoration: none;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 400;
  transition: all 0.2s ease;
  letter-spacing: 0;
}

article.chapter .table-of-contents a:hover {
  color: #333;
  background-color: rgba(0, 0, 0, 0.04);
}

article.chapter .table-of-contents .toc-h2 {
  font-weight: 500;
  margin: 4px 0 2px 0;
  font-size: 13px;
  color: #333;
}

article.chapter .table-of-contents .toc-h3 {
  margin-left: 12px;
  font-size: 12px;
  color: #777;
  font-weight: 400;
  margin-top: 0;
}

@media only screen and (max-width: 960px) {
  article.chapter .challenges aside, article.chapter .design-note aside {
    font: normal 15px / 24px "Source Sans Pro", sans-serif;
    padding-bottom: 4px;
  }
  article.chapter .challenges aside code, article.chapter .challenges aside .codehilite {
    background: #e4eef1;
  }
  article.chapter .design-note aside code, article.chapter .design-note aside .codehilite {
    background: #eef1ea;
  }
}

@media only screen and (max-width: 630px) {
  article.chapter h2 a::before, article.chapter h3 a::before {
    left: -24px;
    width: 24px;
  }
}

@media only screen and (max-width: 580px) {
  article.chapter h2 {
    margin-top: 18px;
    padding-bottom: 2px;
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.7;
  }
  article.chapter h3 {
    margin-top: 18px;
    padding-bottom: 0;
    font-size: 1.3rem;
    font-weight: 600;
  }
  article.chapter .toc-toggle {
    top: 70px;
    right: 16px;
    font-size: 13px;
  }
  article.chapter .table-of-contents {
    top: 104px;
    right: 20px;
    left: auto;
    width: 190px;
    max-height: 45vh;
    padding: 12px 0 0 0;
  }
  article.chapter .challenges, article.chapter .design-note {
    padding: 12px 12px 8px 12px;
    margin: 12px 0 0 0;
    font-size: 15px;
    line-height: 1.7;
  }
  article.chapter .challenges code, article.chapter .challenges .codehilite, article.chapter .design-note code, article.chapter .design-note .codehilite {
    font-size: 14px;
  }
  article.chapter .challenges h2, article.chapter .design-note h2 {
    padding: 3px 0 2px 3px;
    font-size: 1.3rem;
    line-height: 1.7;
  }
  article.chapter .challenges aside, article.chapter .design-note aside {
    line-height: 1.7;
  }
}

article.contents h2 {
  margin: 18px 0 8px 0;
  font: 600 normal 1.5 "Source Sans Pro", sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
}

article.contents h2 .num {
  display: inline-block;
  width: 18px;
}

article.contents ul {
  margin: -18px 0 0 0;
  padding: 8px 0 12px 0;
}

article.contents li {
  padding: 12px 0 0 18px;
  font: normal 0.9975rem/12px "Source Sans Pro", sans-serif;
  color: #7aa0b8;
  list-style-type: none;
}

article.contents li .num {
  display: inline-block;
  letter-spacing: 1px;
  width: 18px;
}

article.contents li a {
  font: 600 1.41666667 "Source Sans Pro", sans-serif;
}

article.contents li.design-note {
  padding-top: 0;
}

article.contents li.design-note a {
  font: 400 0.9975rem/12px "Source Sans Pro", sans-serif;
}

article.contents .chapters {
  display: table;
  width: 864px;
}

article.contents .row {
  display: table-row;
}

article.contents .first, article.contents .second {
  display: table-cell;
  vertical-align: top;
}

article.contents .second {
  padding-left: 48px;
}

article.contents footer {
  width: 864px;
}

@media only screen and (max-width: 1344px) {
  article.contents .chapters, article.contents .row, article.contents .first, article.contents .second {
    display: block;
    width: auto;
  }
  article.contents .second {
    padding-left: 0;
  }
  article.contents footer {
    width: inherit;
  }
}

@media only screen and (max-width: 630px) {
  article.contents h2 .num, article.contents li .num {
    width: 28px;
  }
  article.contents ol, article.contents ul {
    margin-left: 0;
  }
  article.contents li {
    padding-left: 0;
  }
}

@media only screen and (max-width: 580px) {
  article.contents h2 {
    margin: 12px 0 8px 0;
    font-size: 1.5rem;
    line-height: 1.7;
  }
  article.contents h3 {
    padding: 2px 0 3px 0;
    font-size: 17px;
    line-height: 1.7;
  }
  article.contents p {
    font-size: 0.9rem;
    line-height: 1.7;
    margin-top: 0.9rem;
    margin-bottom: 0.9rem;
  }
  article.contents ol, article.contents ul {
    padding-bottom: 8px;
  }
  article.contents li {
    font-size: 14px;
    line-height: 1.7;
    padding: 3px 0 2px 0;
  }
}

body, h1, h2, h3, h4, p, blockquote, code, ul, ol, dl, dd, img {
  margin: 0;
}

img {
  outline: none;
}

img.arrow {
  width: auto;
  height: 11px;
}

img.dot {
  width: auto;
  height: 18px;
  vertical-align: text-bottom;
}

body {
  color: #2c3e50;
  font: normal 0.95rem -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  line-height: 1.7;
}

@media print {
  body, a, code {
    color: #000 !important;
    background: none !important;
  }
  nav, .sign-up {
    display: none;
  }
  .page {
    margin: 0 !important;
  }
  .codehilite {
    margin: 0 !important;
    background: none !important;
    border-radius: 0 !important;
    border-left: solid 1px #dad8d6;
    border-right: solid 1px #dad8d6;
  }
  .codehilite pre {
    color: #000 !important;
  }
  .codehilite .insert {
    border-left: solid 3px #dad8d6 !important;
    border-right: solid 3px #dad8d6 !important;
    background: none !important;
  }
  .codehilite .delete {
    -webkit-print-color-adjust: exact;
    color-adjust: exact;
  }
  .codehilite .insert-before span, .codehilite .insert-after span {
    -webkit-print-color-adjust: exact;
    color-adjust: exact;
  }
}

.modal {
  display: none;
  position: fixed;
  z-index: 9999;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  justify-content: center;
  align-content: center;
}

.modal-image {
  display: block;
  max-width: 90%;
  max-height: 90%;
  margin: auto;
}

.emdash {
  white-space: nowrap;
}

.scrim {
  position: absolute;
  width: 100%;
  height: 10000px;
  z-index: 4;
  background: url("rows.png");
}

.small-caps {
  font-weight: 600;
  font-size: 13px;
}

a {
  color: #1481b8;
  text-decoration: none;
  border-bottom: solid 1px rgba(222, 233, 237, 0);
  transition: color 0.2s ease, border-color 0.4s ease;
}

a:hover {
  color: #1481b8;
  border-bottom: solid 1px #dee9ed;
}

nav {
  font: 300 15px/24px "Source Sans Pro", sans-serif;
  background: #29313d;
  color: #4b6781;
}

nav a, nav h2 a {
  color: #7aa0b8;
  text-decoration: none;
  border-bottom: none;
}

nav a:hover {
  color: #dee9ed;
  text-decoration: none;
  border-bottom: none;
}

nav img {
  box-sizing: border-box;
  width: 100%;
  padding: 48px 48px 24px 48px;
}

nav h2 {
  font: 400 16px/24px "Source Sans Pro", sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #7aa0b8;
}

nav h3 {
  font: 400 18px/24px "Source Sans Pro", sans-serif;
  color: #7aa0b8;
}

nav h2 small, nav h3 small {
  float: right;
  font-size: 16px;
  color: #4b6781;
}

nav ol, nav ul {
  margin: 6px 0 3px 0;
  padding: 6px 0 4px 24px;
  border-top: solid 1px #3b4b5e;
  border-bottom: solid 1px #3b4b5e;
}

nav ul {
  list-style-type: none;
  padding-left: 0;
}

nav hr {
  border: none;
  border-top: solid 1px #3b4b5e;
  margin: 6px 0 0 0;
  padding: 0 0 3px 0;
}

nav li small {
  float: right;
  font-size: 14px;
  color: #4b6781;
}

nav li.divider {
  margin: 5px 0 7px 0;
  border-top: solid 1px #3b4b5e;
}

nav li.end-part {
  font-size: 12px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 1px;
}

nav li.end-part small {
  font-weight: 300;
  text-transform: none;
  letter-spacing: 0;
}

nav .prev-next {
  padding-top: 7px;
  font: 400 12px/18px "Source Sans Pro", sans-serif;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 1px;
}

nav.wide {
  position: fixed;
  width: 336px;
  height: 100%;
}

nav.wide .contents {
  margin: 24px 48px;
}

.nav-wrapper {
  position: absolute;
  right: 288px;
}

nav.floating {
  display: none;
  z-index: 2;
  position: absolute;
  width: 288px;
  border-bottom-left-radius: 3px;
  border-bottom-right-radius: 3px;
}

nav.floating #expand-nav {
  padding: 0 0 4px 0;
  display: block;
  font-size: 20px;
  text-align: center;
  color: #4b6781;
  cursor: pointer;
  transition: padding 0.2s ease, margin 0.2s ease, color 0.2s ease;
}

nav.floating #expand-nav, nav.floating #expand-nav:hover {
  border-bottom: none;
}

nav.floating #expand-nav:hover {
  color: #dee9ed;
}

nav.floating .expandable {
  overflow: hidden;
  padding: 0 12px;
  max-height: 0;
  transition: margin 0.2s ease, max-height 1.0s ease;
}

nav.floating .expandable .prev-next {
  padding-bottom: 6px;
}

nav.floating .expandable.shown {
  max-height: 550px;
}

nav.floating img {
  padding: 48px 24px 24px 24px;
}

nav.floating.pinned {
  position: fixed;
  top: -85px;
}

nav.floating.pinned .expandable {
  margin-top: -13px;
}

nav.floating.pinned #expand-nav {
  margin-top: -14px;
}

nav.narrow {
  display: none;
  text-align: center;
}

nav.narrow img {
  box-sizing: content-box;
  padding: 11px 0 3px 0;
  width: auto;
  height: 27px;
}

nav.narrow .prev, nav.narrow .next {
  font-size: 32px;
  position: absolute;
  top: 12px;
  padding: 0 48px;
}

nav.narrow .prev {
  left: 0;
}

nav.narrow .next {
  right: 0;
}

.left {
  float: left;
}

.right {
  float: right;
}

.page {
  position: relative;
  width: 864px;
  margin: 0 auto 0 384px;
}

.em {
  padding: 0 .1em;
  white-space: nowrap;
}

.ellipse {
  white-space: nowrap;
}

code {
  font: normal 0.9em "Source Code Pro", Menlo, Consolas, Monaco, monospace;
  color: #476582;
  padding: .25rem .5rem;
  background-color: rgba(27, 31, 35, 0.05);
  border-radius: 3px;
  margin: 0;
}

strong code {
  font-weight: bold;
  color: inherit;
}

a code {
  color: #1481b8;
}

.codehilite {
  color: #595959;
  background: #faf8f5;
  border-radius: 3px;
  padding: 12px;
  margin: -12px;
}

pre {
  font: normal 13px/20px "Source Code Pro", Menlo, Consolas, Monaco, monospace;
  margin: 0;
  padding: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

div.codehilite + div.challenges {
  margin-top: 24px;
}

article {
  position: relative;
  width: 768px;
  text-align: justify;
}

article h1 {
  position: relative;
  font: 600 24.8px/24.8px -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  padding: 70px 0 19px 0;
  z-index: 2;
}

article h1.part {
  font: 600 36px/48px "Source Sans Pro", sans-serif;
  padding: 108px 0 20px 0;
  text-transform: uppercase;
  letter-spacing: 1px;
}

article p {
  margin-top: 0.95rem;
  margin-bottom: 0.95rem;
}

article p.brief-first-p {
  margin: 0;
}

article ol, article ul {
  margin: 24px 0;
  padding: 0 0 0 24px;
}

article img {
  max-width: 100%;
}

article img.wide {
  max-width: none;
  width: 912px;
}

aside {
  position: absolute;
  right: -336px;
  width: 288px;
  font: 400 0.95rem -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  line-height: 1.7;
  border-top: solid 1px #dee9ed;
}

aside p {
  margin: 20px 0;
}

aside p:first-child,
aside img:first-child {
  margin-top: 4px;
}

aside p:last-child {
  margin-bottom: 4px;
}

aside code {
  font-size: 14px;
  border-radius: 2px;
  padding: 1px 2px;
}

aside .codehilite {
  padding: 6px;
  margin: -12px 0;
}

aside .codehilite:last-child {
  margin-bottom: 4px;
}

aside img.above {
  position: absolute;
  bottom: 100%;
  margin-bottom: 16px;
}

aside blockquote {
  margin: 20px 0;
}

aside blockquote::before, aside blockquote::after {
  content: none;
}

aside blockquote p {
  margin: 0 12px;
  font: italic 15px/20px -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  color: inherit;
}

aside.bottom {
  border-top: none;
  border-bottom: solid 1px #dee9ed;
}

blockquote {
  position: relative;
  margin: 29px 0 31px 0;
}

blockquote::before, blockquote::after {
  position: absolute;
  top: -20px;
  font: italic 72px -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  color: #dee9ed;
}

blockquote::before {
  content: "\201c";
  left: -7px;
}

blockquote::after {
  content: "\201d";
  right: 8px;
}

blockquote p {
  margin: 0 48px;
  font: italic 24px/36px -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  color: #5985a6;
}

blockquote p em {
  font-style: normal;
}

blockquote cite {
  display: block;
  text-align: right;
  color: #7aa0b8;
  font-style: normal;
  font-size: 18px;
}

blockquote cite::before {
  content: "\2014\00a0";
  color: #dee9ed;
}

blockquote cite em {
  font-style: italic;
}

footer {
  position: relative;
  border-top: solid 1px #dee9ed;
  color: #7aa0b8;
  font: 400 15px "Source Sans Pro", sans-serif;
  text-align: center;
  margin: 48px 0;
  padding-top: 48px;
}

footer a, footer a:hover {
  border: none;
}

footer .next {
  position: absolute;
  right: 0;
  top: -13px;
  padding-left: 4px;
  background: #fff;
  font: 400 1rem "Source Sans Pro", sans-serif;
  line-height: 1.7;
  text-transform: uppercase;
  letter-spacing: 1px;
}

footer .next:hover {
  color: #004466;
  border: none;
}

.dedication {
  margin: 96px 0 128px 0;
  text-align: center;
}

.dedication img {
  width: 50%;
}

.source-file, .source-file-narrow {
  font: normal 11px/16px "Source Code Pro", Menlo, Consolas, Monaco, monospace;
  color: #b9b9b7;
}

.source-file em, .source-file-narrow em {
  color: #999998;
  font-style: normal;
}

.source-file-narrow {
  display: none;
  margin: 0px -12px 0 0;
  padding: 14px 0 0 0;
  text-align: right;
}

.source-file {
  position: absolute;
  right: -336px;
  width: 288px;
  padding: 2px 0 0 0;
}

.source-file::before {
  content: "<<";
  color: #dad8d6;
  position: absolute;
  left: -36px;
  width: 36px;
  text-align: center;
}

.codehilite pre {
  color: #797978;
}

.codehilite .k {
  color: #0099e6;
}

.codehilite .n {
  color: #dd713c;
}

.codehilite .s {
  color: #c38e22;
}

.codehilite .e {
  color: #e8ba30;
}

.codehilite .c {
  color: #a9a9a7;
}

.codehilite .a {
  color: #9966cc;
}

.codehilite .i {
  color: #1b6e98;
}

.codehilite .t {
  color: #00a4b3;
}

.codehilite .insert {
  margin: -2px -12px;
  padding: 2px 10px;
  border-left: solid 2px #dad8d6;
  border-right: solid 2px #dad8d6;
  background: #f5f3f0;
}

.codehilite .delete {
  margin: -2px -12px;
  padding: 2px 10px;
  border-left: solid 2px #dad8d6;
  border-right: solid 2px #dad8d6;
  background: repeating-linear-gradient(-45deg, #dad8d6, #dad8d6 1px, rgba(0, 0, 0, 0) 1px, rgba(0, 0, 0, 0) 6px);
}

.codehilite .delete span {
  color: #b9b9b7;
}

.codehilite .insert-before, .codehilite .insert-after {
  color: #b9b9b7;
}

.codehilite .insert-before .insert-comma {
  margin: -2px -1px;
  padding: 2px 1px;
  border-radius: 2px;
  background: #f5f3f0;
  color: #595959;
}

@media only screen and (max-width: 1344px) {
  nav.wide {
    display: none;
  }
  nav.floating {
    display: block;
  }
  body {
    margin: 0 24px;
  }
  .page {
    position: relative;
    width: inherit;
    max-width: 912px;
    margin: 0 auto;
  }
  article {
    width: inherit;
    margin-right: 336px;
  }
  article h1 {
    padding: 70px 0 19px 0;
    font-size: 24.8px;
  }
}

@media only screen and (max-width: 960px) {
  body {
    margin: 0;
  }
  nav.floating {
    display: none;
  }
  nav.narrow {
    display: block;
  }
  .page {
    margin: 0 48px;
    width: inherit;
  }
  article {
    margin: 0;
  }
  article img.wide {
    width: inherit;
    max-width: 100%;
  }
  aside {
    position: inherit;
    right: inherit;
    width: inherit;
    border-bottom: solid 1px #dee9ed;
  }
  aside p:first-child {
    margin-top: 8px;
  }
  aside p:last-child {
    margin-bottom: 8px;
  }
  aside div.codehilite:last-child {
    margin-bottom: 12px;
  }
  aside img {
    display: block;
    max-width: 288px;
    margin: 0 auto;
  }
  aside img.above {
    position: relative;
  }
  aside + div.codehilite {
    margin-top: 12px;
  }
  div.codehilite + aside {
    margin-top: 24px;
  }
  .source-file {
    display: none;
  }
  .source-file-narrow {
    display: block;
  }
}

@media only screen and (max-width: 630px) {
  .page {
    margin: 0 24px;
    width: inherit;
  }
  nav.narrow .prev, nav.narrow .next {
    padding: 0 24px;
  }
}

@media only screen and (max-width: 580px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }
  .small-caps {
    font-size: 12px;
  }
  nav.narrow img {
    padding: 9px 0 1px 0;
    height: 27px;
  }
  nav.narrow .prev, nav.narrow .next {
    top: 11px;
  }
  article h1 {
    font-size: 24.8px;
    padding: 70px 0 19px 0;
  }
  article h1.part {
    font-size: 30px;
    padding: 97px 0 17px 0;
  }
  article p {
    margin: 22px 0;
  }
  article ol, article ul {
    margin: 22px 0;
    padding: 0 0 0 22px;
  }
  blockquote {
    margin: 27px 0 28px 0;
  }
  blockquote::before, blockquote::after {
    top: -17px;
    font-size: 52px;
  }
  blockquote p {
    margin: 0 22px;
    font-size: 20px;
    line-height: 33px;
  }
  footer .next {
    font-size: 15px;
  }
}