style.css

      @import "https://www.w3.org/2019/09/TPAC-template/fonts/iconmonstr-iconic-font.css";

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

html,
body {
  background: #fafafa;
}

html {
  /*font-size: 14px;*/
  padding: .5em;
}

body {
  border-radius: .6em;
  color: #333;
  font: 1.1em/1.3 Helvetica, Arial, Verdana, sans-serif;
  hyphens: none;
  margin: 0 auto;
  max-width: 65em;
  padding: .5em;
}

.header :first-child {
  margin-top: 0;
}

header #logo {
  height: 72px;
}

header #logo img {
  float: left;
}

header #translations {
  float: right;
}

#top {
  background-image: url("https://www.w3.org/comm/assets/graphics/web-ML/workshop-bg.png");
  background-repeat: no-repeat;
  background-size: cover;
  min-height: 454px;
  color: white;
  position: relative;
}

#top.small {
    background-color: black;
  background-image: url("images/workshop-short-banner.png");
  background-repeat: no-repeat;
  background-size: contain;
  min-height: 100px;
  position: relative;
}


#top h1,
#top h2 {
  padding: 1rem;
  color: white;
  text-shadow: 4px 4px 20px black;
}

@media all and (min-width: 787px) {
  #top h1,
  #top h2 {
    margin-left: 450px;
  }
}

#top.small h1 {
    text-shadow: none;
    margin-left: 100px;
}


#top h1 a:link, #top h1 a:visited { color: white;}

#top a.credit { position: absolute; bottom:0; right:0;}

.footer :last-child {
  margin-bottom: 0;
}

h1,
h2,
h3,
h4,
h5,
p,
dl,
ul,
ol {
  margin: 1.5rem 0;
}

a,
h1,
h2,
.menu a.active-tab {
  color: #005a9c;
}

a:hover {
  color: #111;
}

a.ref,
.has-ref {
  cursor: pointer;
  display: inline;
}

a.ref {
  color: inherit;
  display: none;
  font-size: 1em;
  left: 0;
  opacity: .25;
  position: absolute;
  text-decoration: none;
}

.has-ref:hover > a.ref {
  display: block;
}

.has-ref:target > a.ref {
  display: block;
  opacity: .5;
}

.has-ref {
  margin-left: -1em;
  padding-left: 1em;
  position: relative;
}

.graphic {
  height: 13em;
  margin: 0 -1.5em;
  overflow: hidden;
  position: relative;
}

.graphic img {
  bottom: 0;
  height: 100%;
  left: 0;
  position: absolute;
  width: 100%;
}

.box,
.type {
  box-shadow: .3em .3em 0 rgba(0,0,0,.1);
  border: 1px solid #ccc;
}

/* If you rather clip than squeeze the image, remove `height: 100%`. */
.box {
  clear: right;
  color: #666;
  float: right;
  font-size: 1rem;
  margin-left: 3rem;
  padding: 1em;
  width: 19em;
  z-index: 2;
  background-color: #f2fdff;
  margin-bottom: 1em;
}

.box + .box {
  margin-top: 2rem;
}

.box h2 {
  font-size: 1.2rem;
  line-height: 1.4;
  margin: 0;
}

.box *:last-child {
  margin-bottom: 0;
}

.image-paragraph-host {
  margin-bottom: .75em;
}

.image-paragraph {
  margin: 0;
}

.image-link {
  display: block;
}

.image-link img {
  max-width: 225px;
  padding: 2.5vmin 0;
  width: 100%;
}

.footer {
  border-top: 1px solid #eee;
  clear: both;
  color: #777;
  font-size: 1rem;
  margin: 2rem 0;
  padding-top: .5rem;
}

.menu {
  background: #005a9c;
  font-size: 1rem;
  margin: 0 0 2em;
}

.menu,
.menu ul,
.menu li {
  width: 100%;
}

.menu ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.menu li + li a {
  border-left: 2px solid #fff;
}

.menu a {
  color: #eee;
  display: block;
  font-size: .95rem;
  height: 100%;
  padding: .6rem;
  text-align: center;
  text-decoration: none;
  transition: .05s background ease-in-out, .05s color ease-in-out;
  -moz-user-select: none;
  -ms-user-select: none;
  -webkit-user-select: none;
  user-select: none;
  width: 100%;
}

.menu a:active {
  opacity: .75;
}

.menu a.active-tab {
  background: #fff;
  font-weight: bold;
  border-top: solid thin #005a9c;
  border-bottom: solid thin #005a9c;
}

.menu a:link:hover {
  background: #111;
  color: #fff;
}

ul {
  list-style: square;
  margin-left: 0;
  padding-left: 1em;
}

blockquote {
  margin-left: 1em;
}

.main {
  margin-top: 3rem;
}

dd {
  margin: 0 0 .6em;
}

dt {
  font-weight: 700;
  margin-top: 1rem;
}

.main dt {
  margin-top: 2rem;
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
h4 {
  break-after: avoid;
}

.main h2 {
  margin-top: 1.5em;
}

address {
  line-height: .25em;
}

@media all and (min-width: 699px) {
  html {
    background: #005a9c;
  }
}

@media all and (max-width: 860px) {
  html {
    padding: 0;
  }

  body {
    border-radius: 0;
  }

  .menu ul {
    display: block;
  }

  .menu li + li a {
    border-top: 2px solid #fff;
    border-left: 0;
  }

  .menu li + li a {
    margin-left: 0;
  }

  .graphic {
    height: 10em;
    margin: 0;
  }

  /* The right-floating boxes become normal blocks. */
  .box {
    float: none;
    margin-left: 0;
    width: auto;
  }
}

@page {
  margin: 2cm;
}

@media print {
  html {
    background: none;
    padding: 0;
  }

  body {
    background: none;
    border-radius: 0;
    padding: 0;
  }
}

/* Initialize footnote counters. */
body {
  counter-reset: footnote_counter footnote-ref_counter;
}

h2.footnote {
  counter-increment: footnote_counter;
}

a.footnote-ref {
  counter-increment: footnote-ref_counter;
  text-decoration: none;
}

h2.footnote:before {
  content: counter(footnote_counter);
  display: block;
  float: left;
  font-size: .9em;
  margin-right: 1.25ch;
  padding: 2em 4em;
  vertical-align: top;
}

h2.footnote:after {
  clear: both;
  content: "";
  display: block;
}

a.footnote-ref:after {
  content: counter(footnote-ref_counter);
  font-size: .6em;
  margin-left: .25em;
  vertical-align: super;
}

h2.footnote:before,
a.footnote-ref:after {
  background-color: #005a9c;
  border-radius: 50%;
  color: #fff;
  font-weight: 700;
  padding: .1em .5em;
}

.schedule {
  list-style: none;
}

.schedule li,
summary .desc {
  display: flex;
}

.schedule li + li {
  margin-top: .5rem;
}

summary .time {
  background-color: #005c9c;
  border-radius: 5px 0 0 5px;
  color: #fff;
  display: block;
  font-weight: bold;
  margin-bottom: 5px;
  min-width: 8em;
  vertical-align: top;
  white-space: nowrap;
}

summary .time,
.title,
.type {
  padding: 3px 6px;
}

.break summary .time {
  background-color: #666;
  color: #fff;
}

.break .title {
  color: gray;
  font-style: italic;
}

summary .time span { font-size: 67%; }

.type {
  clear: right;
  display: inline-block;
  font-size: 67%;
  font-weight: normal;
  height: 100%;
  margin: 0 13px 0 0;
  order: -1;
  min-width: 7.5em;
  max-width: 7.5em;
  overflow: hidden;
  transform: rotate(5deg);
}

.type:empty {
  border-color: transparent;
  box-shadow: none;
}

dt.type {
  font-size: 100%;
  margin: 0;
}

.type-lightning {
  background-color: #ffe7ba;
}

.type-plenary {
  background-color: #b9d3ee;
}

.type-breakout {
  background-color: #c0d9af;
}

.type-panel {
  background-color: #ffe4e1;
}

span.title {
  display: block;
  flex: 1;
  margin-left: 5px;
  order: 1;
}

div.talks > details {
    border: 1px solid #ccc;
    box-shadow: .3em .3em 0 rgba(0,0,0,.1);
    margin-top: 20px;
    padding: 1em;
}
div.talks details:nth-of-type(odd) {
    background: #F2FDFF;
}
div.talks > details > summary div.grid {
    position: relative;
    display: grid;
    grid-template-columns: 200px auto;
    grid-template-rows: auto auto;
}

div.talks > details > summary {
    position: relative;
  list-style: none;
}

div.talks > details > summary::-webkit-details-marker {
  display: none;
}

div.talks > details > summary div.grid:after {
    content: 'more ►';
    position: absolute;
    right: 0;
    bottom: 0;
    cursor: pointer;
    color: gray;
}

div.talks > details[open] > summary div.grid:after {
    content: 'less ▼';
    cursor: pointer;
}

summary span:first-child, summary a:first-child {
    grid-column: 1;
    grid-row: 1 / -1;
    place-self: center;
    color: gray;
}
summary a:nth-child(2) {
    grid-column:2;
    grid-row:1;
}
summary .summary {
    grid-column: 2;
    grid-row: 2;
    padding-bottom: 2em;
}
summary a:nth-child(4) {
    grid-row: 3;
    grid-column:1 / -1;
    text-align:right;
    font-size:0.8em;
}
summary .summary span {
    position: absolute;
    bottom:0;
    right:0;
} 

div.talks details[open] .summary, div.talks details[open] a:nth-child(4) {
    display: none;
}

div.talks dt {
  margin: 0;
}

div.talks dd {
     margin: 0;
     padding-left: 1rem;
}

div.talks dd + dd { font-style: italic;}

div.talks dd + dt {
  padding-top: 1rem;
}

.format {
  margin-bottom: 2.25rem;
}

.format dt {
  font-size: 1.1rem;
  /*font-weight: 600;*/
  margin: .5rem 0 1.25rem;
  padding: .5rem 1rem;
}

.format dd {
  margin: 0 1rem 1.5rem;
}

.sponsors-section {
  margin-top: 1rem;
}

.sponsors-section :first-child {
  margin-top: 0;
}

.sponsors-section :last-child {
  margin-bottom: 0;
}

#notification {
  background-color: #ff0;
  border: 1px solid #ccc;
  box-shadow: .2em .4em .5em #888;
  color: #666;
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 1em;
  padding: .3em;
  text-align: center;
}

.concluded {
  text-decoration: line-through;
}

@media print {
  h1 {
    background: none;
    color: #111;
  }

  nav, aside {
    display: none;
  }

  body,
  article {
    margin: 0;
    padding: 0;
    width: 100%;
  }

  @page {
    margin: 2cm;
  }

  h2, h3 {
    page-break-after: avoid;
  }

  article {
    page-break-before: always;
  }

  ul, img {
    page-break-inside: avoid;
  }

  #dates {
    display: none;
  }
}

cite { font-weight: bold;}

ol ol { margin: 1.5rem;}

#proposed-topics {
  list-style: none;
}

#proposed-topics > li > ul > li, #secondary-goals, .pc > li {
  font-size: 1rem;
  margin-left: .5rem;
}

#top > h2 {
  background-color: #000;
  opacity: .7;
}

label:before, label:after {
  content: "\a";
  white-space: pre;
}

input, textarea {
  width: 100%;
  font: .9em/1.1 Helvetica, Arial, Verdana, sans-serif;
}

button {
  margin: 20px 0 0 0;
  width: 100%;
  height: 1.5rem;
}

img.tn {
    display:inline;
    vertical-align:middle;
    padding-right:.5em;
}

div.related {
	background-color: #C2CDCF;
	border-radius: .6em;
	padding: 0.5em;
}
div.related p {
    margin-bottom: 0;
}
div.related ul {
    margin-top: 0;
    margin-left: 1em;
}
.simpletooltip a:link, .simpletooltip a:visited {
    color: #acf;
}
details span.added {
    top:-1em;
    left: -1em;
    padding: 0.2em;
	position: absolute;
	background-color: #ff0;
	font-size: 0.8em;
	transform: translate(-3em) rotate(-45deg);
	transform-origin: top right;
}
.chat p {
    font-family: monospace;
}

      /* Miscellaneous icons. Add something like class="picto im-info" to an
	 element to prefix the element with the im-info icon from the
	 iconmonstr-iconic font. */
      .picto::before {font-family: iconmonstr-iconic-font;
	font-size-adjust: 1.0; line-height: 0.6; font-style: normal;
	display: inline-block; margin-right: 0.33em;
	vertical-align: middle; text-indent: 0;
	text-rendering: auto; -webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale}
      li.picto {list-style: none; padding-left: 0; margin-left: 0}
      .button.picto, button.picto {padding-right: 4px}
      .buttons button {font: inherit; font-weight: 700; cursor: pointer}
      .buttons a:hover {color: white;}
      .buttons > * {
	background: #103852;
	color: white;
	font-weight: 700;
	min-height: 2.5em;
	display: flex;
	align-items: center;
	justify-content: center;
      }
      .buttons > * {
	box-sizing: border-box;
	float: left;
	width: 48%;
	border: none;
	padding: 0.6rem;
	width: calc(49.9% - 2rem);
	margin: 0 2rem 2rem 0;
	text-align: center;
        min-height: 6.5em;
	height: auto;
        }
      @media (min-width: 33em) {
      .buttons > *, .badges > * {
	width: 29.5;
	width: calc(33.3% - 2rem);
      }
      }

            div[data-fmt="pdf"] {width: 40.889em; height: 23em; /* Ratio 16:9 */
	/* Add a border, because the slides are white: */
	overflow: hidden; box-sizing: border-box; border: 1px solid;
	display: block; margin: 0 0 1em 0; box-shadow: none}
       div[data-fmt="pdf"] canvas {vertical-align: bottom}

div[data-fmt="pdf"] .page { position: relative; }

a.topic {
    font-weight: bold;
}

a.talk:before {
    content: "🎥";
    vertical-align: middle;
}