styles.css

@font-face {
  font-family: "M+2pheavy";
  src: url("mplus-2p-heavy.woff");
  font-weight: bold;
  font-style: normal;
}

@font-face {
  font-family: "Droid Serif";
  font-style: normal;
  font-weight: 400;
  src: local("Droid Serif"), local("DroidSerif"), url("./droidserif.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215;
}

@font-face {
  font-family: "Droid Serif";
  font-style: normal;
  font-weight: 700;
  src: local("Droid Serif Bold"), local("DroidSerif-Bold"), url("./droidserif-bold.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215;
}

@font-face {
  font-family: "Droid Serif";
  font-style: italic;
  font-weight: 400;
  src: local("Droid Serif Italic"), local("DroidSerif-Italic"), url("./droidserif-italic.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215;
}

@font-face {
  font-family: "Droid Serif";
  font-style: italic;
  font-weight: 700;
  src: local("Droid Serif Bold Italic"), local("DroidSerif-BoldItalic"), url("./droidserif-bolditalic.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215;
}

/* GENERAL ELEMENTS */

/* Resets */
body, h1, h2, h3, h4, h5, h6, p, a, ul, ol, dl, dt, dd, table, caption, th, td, fieldset, legend, blockquote {
  font-weight: normal;
  margin: 0;
  padding: 0;
  color: inherit;
  box-sizing: border-box;
}

a img, form, legend {
  border: 0;
}

fieldset, abbr {
  border: none;
}

/* Basics */

body {
  font-size: 14px;
  line-height: 1.45em;
  font-family: "Droid Serif", Georgia, serif;
  color: #222;
  width: 760px;
  margin: 4em auto;
  padding: 0 1em;
}

/* Headings */

h1 {
  font-size: 300%;
}

h2:not(#dev-edition-h2):not(#about-dev-edition) {
  font-size: 160%;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  line-height: 1.5em;
  font-family: "M+2pheavy", "Helvetica Neue", Arial, Helvetica, sans-serif;
  margin: 2em 0;
}

h2 .secno {
  position: absolute;
  display: block;
  left: -2em;
  text-align: right;
}

h3 .secno, h4 .secno, h5 .secno, h6 .secno {
  display: none;
}

h3 {
  font-size: 140%;
}

h4, h5 {
  font-size: 120%;
}

h6 {
  font-size: 100%;
}

h5, h6 {
  font-family: "Helvetica Neue", Arial, Helvetica, sans-serif;
}

h2, h3, h4, h5, h6 {
  position: relative;
}

h3, h4, h5, h6 {
  margin: 3em 0 1em 0;
}

h4, h5, h6 {
  color: #450b09;
}

h4, h6 {
  font-weight: bold;
}

h1 dfn, h2 dfn, h3 dfn, h4 dfn, h5 dfn, h6 dfn {
  font-style: normal;
}

/* Self-links */

a.self-link {
  position: absolute;
  top: 0;
  left: -2.5em;
  width: 2em;
  height: 2em;
  text-align: center;
  transition: opacity 0.2s;
  opacity: 0.5;
  text-decoration: none;
}
a.self-link:hover {
  opacity: 1;
  text-decoration: none;
}

h2 > a.self-link, h3 > a.self-link, h4 > a.self-link, h5 > a.self-link, h6 > a.self-link {
  font-size: 83%;
  color: inherit;
  border-bottom: none;
}

h2 > a.self-link {
  left: -4em;
}

a.self-link::before {
  content: "¶";
}

h2 > a.self-link::before, h3 > a.self-link::before, h4 > a.self-link::before,
h5 > a.self-link::before, h6 > a.self-link::before {
  content: "§";
}


/* Links */

a:link {
  color: #0773ca;
  text-decoration: none;
  border-bottom: 1px solid #aaa;
}

a:visited {
  color: #033b68;
  border-bottom: 1px solid #ccc;
}

a:hover {
  color: #000;
  border-bottom: 1px solid #000;
}

a:active {
  color: #CC211B;
  border-bottom: none;
}

/* Paragraphs and lists */

p {
  line-height: 1.7em;
}

p, ul, ol, dl {
  margin-bottom: 1em;
  width: 520px;
}

hr {
  display: block;
  background: none;
  border: none;
  padding: 0;
  margin: 3em 0;
  height: auto;
}

ul li ul {
  margin: 0;
}

li li {
  margin-left: 1.2em;
}

dt {
  font-weight: bold;
}

dd {
  margin-bottom: 0.5em;
}

ul.domTree li {
  margin-bottom: 0;
  list-style: none;
}

/* Tables */

table {
  border: 0;
}

table th, table td {
  border: 0;
  border-bottom: 1px solid #acc;
  padding: 4px;
  vertical-align: top;
}

table th li, table td li {
  margin: 0 0 0 1.5em;
}

table caption, table th {
  text-align: left;
  color: #450b09;
}

table th {
  font-weight: bold;
}

table td {
  vertical-align: top;
  padding: 0.25em 1.25em 0.25em 0em;
}

table tr, table tbody {
  border: 0px;
}

/* Code */

code, pre {
  font-family: "DejaVu Sans Mono", Inconsolata, Consolas, "Lucida Console", monospace;
  display: inline-block;
  font-style: normal;
}

pre {
  display: block;
  padding: 0.25em 0.3em;
  margin: 1em 0em 1em -2.6em;
  border: 1px solid #eee;
  white-space: pre-wrap;
}

/* Variables */

var sub {
  vertical-align: bottom;
  font-size: smaller;
  top: 0.1em;
}

var > var::before {
  content: "⟨";
  font-style: normal;
}

var > var::after {
  content: "⟩";
  font-style: normal;
}

/*
  Typographic conventions
  (http://developers.whatwg.org/introduction.html#typographic-conventions)
*/
.note, .example, .XXX, .warning, pre {
  width: 580px;
}

.note {
  padding: 3px;
  background-color: #eee;
}

.note pre {
  background-color: #fff;
}

.example {
  color: #555;
  font-style: italic;
}

.XXX {
  background-color: #fceaea;
  padding: 0.5em;
}

.warning {
  background-color: #f6bfbd;
  border: 1px solid #CC211B;
  padding: 0.5em;
}

.css::before {
  content: "CSS:";
  color: #888888;
  font-size: 1em;
  display: block;
  background: transparent;
}

/* Caniuse boxes */

.status {
  right: auto;
  left: calc(50% + 586px / 2 - 9em / 2);
}

/* SPECIFIC ELEMENTS */
/* Header */

header#head {
  position: relative;
}

header#head hgroup {
  width: 580px;
}

header#head h1 {
  line-height: 1em;
  font-family: "M+2pheavy", "Helvetica Neue", Arial, Helvetica, sans-serif;
  font-weight: bold;
  color: black;
}

header#head a.logo, header#head a.logo:visited,
header#head hgroup a:link, header#head hgroup a:visited {
  border-bottom: 0;
}

header#head a {
  color: black;
}

header#head h1 a:hover {
  text-shadow: 0 0 5px rgba(0, 0, 0, 0.6);
}

header#head h2 {
  font-size: 12px;
  margin-bottom: 0.5em;
  font-family: "Droid Serif", Georgia, serif;
  font-style: italic;
  font-weight: normal;
  color: #555;
}

header#head .logo {
  position: absolute;
  left: -120px;
}

/* Search bar */

#search {
  position: absolute;
  top: 0;
  right: 0;
}

#search, #search input {
  width: 150px;
}

#search ol {
  z-index: 1;
  position: absolute;
  right: 0;
  width: 25em;
  list-style: none;
  background-color: #eee;
  border-radius: 0.2em;
  box-shadow: 0 0 1em rgba(0, 0, 0, 0.75);
}

#search ol li {
  text-align: left;
}

#search ol li:first-of-type a:focus {
  border-top-left-radius: 0.2em;
  border-top-right-radius: 0.2em;
}

#search ol li:last-of-type a:focus {
  border-bottom-left-radius: 0.2em;
  border-bottom-right-radius: 0.2em;
}

#search ol li a {
  display: block;
  padding: 0.2em 0.4em;
  color: #222;
}

#search ol li a:focus {
  color: white;
  background-color: #3c790a;
}

#search ol li a:focus span {
  color: rgba(255, 255, 255, 0.7);
}

#search ol li a span {
  display: block;
  color: #555;
  font-size: 0.7em;
  font-style: italic;
}

/* Nav and table of contents */

body > nav {
  margin: 2em 0;
}

ol.toc a:link {
  border-bottom: 1px solid #bbb;
}

ol.toc a:visited {
  border-bottom: 1px solid #eee;
}

ol.toc a:hover {
  color: #000;
  border-bottom: 1px solid #000;
}

ol.toc li {
  list-style: none;
}

ol.toc .secno {
  color: #888888;
}

html.index ol.toc li {
  position: relative;
}

html.index ol.toc li .secno {
  position: absolute;
  left: -1.7em;
}

html.index ol.toc li li {
  margin-left: 1.6em;
}

html.index ol.toc li li .secno {
  left: -1.7em;
}

html.index ol.toc li li a {
  margin-left: 1em;
}

html.index ol.toc li ol ol {
  display: none;
}

html:not(.index) ol.toc li {
  margin-bottom: 0.2em;
}
html:not(.index) ol.toc ol {
  margin: 0;
}

/* About */

#about-dev-edition {
  margin: 1.5em 0 1em 0;
  font-size: 34px;
}

/* RESPONSIVE STYLES */

@media screen and (max-width: 767px) {
  body {
    font-size: 110%;
    line-height: 1.6em;
    max-width: 580px;
    margin: 1em auto;
    padding: 0 2em;
  }

  header#head {
    text-align: center;
  }

  header#head .logo {
    width: 60px;
    position: static;
    left: 0;
  }

  img {
    max-width: 100%;
    height: auto;
  }

  h2:not(#dev-edition-h2) {
    font-size: 18px;
  }

  .note, .example, .XXX, .warning, pre {
    width: 560px;
  }

  pre {
    margin-left: -0.6em;
    word-wrap: break-word;
  }

  /* Don't position self-link in headings off-screen */
  h2 > a.self-link, h3 > a.self-link, h4 > a.self-link, h5 > a.self-link, h6 > a.self-link {
    left: auto;
    top: auto;
    margin-left: 0.5em;
  }

 .status {
    left: auto;
    right: -8.9em;
  }

  /* Search */
  #search {
    position: relative;
    display: block;
    width: 100%;
  }

  #search input,
  #search ol {
    margin: 0 auto;
    width: 90%;
  }

  #search ol {
    position: relative;
    box-shadow: none;
  }
}
/* DOM tree borders */
ul.domTree, ul.domTree ul {
  padding: 0 0 0 1em;
  margin: 0;
}

ul.domTree li {
  padding: 0;
  margin: 0;
  list-style: none;
  position: relative;
}

ul.domTree li li {
  list-style: none;
}

ul.domTree li:first-child::before {
  position: absolute;
  top: 0;
  height: 0.6em;
  left: -0.75em;
  width: 0.5em;
  border-style: none none solid solid;
  content: '';
  border-width: 0.1em;
}

ul.domTree li:not(:last-child)::after {
  position: absolute;
  top: 0;
  bottom: -0.6em;
  left: -0.75em;
  width: 0.5em;
  border-style: none none solid solid;
  content: '';
  border-width: 0.1em;
}