:root {
  --margin: 16px;
}

* {
  line-height: 1.5rem;
}

.strong {
  font-weight: bold;
}

html {
  padding: 0;
}

body {
  font-family: Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
}

main,
nav,
footer,
section,
pre {
  padding: var(--margin);
}

nav a {
  color: black;
}

nav > h2::before {
  content: "🧑🏼‍💻";
  margin-right: 10px;
}

@media all and (min-width: 640px) {
  main,
  nav,
  footer {
    padding: 40px;
  }
}

nav,
footer {
  background-color: #fafbfc;
}

section {
  margin-top: 5em;
  margin-bottom: 2em;
  border-bottom: 1px solid gray;
  box-shadow: 0 4px 2px -2px gray;
}

p {
  max-width: 640px;
}

pre,
.numbered-code {
  white-space: pre-wrap;
  background-color: #1e1e1e;
  color: white;
}

img {
  max-width: 100%;
  border: 2px solid rgba(204, 204, 204, 0.5);
  box-shadow: 0px 0px 5px 2px rgba(204, 204, 204, 0.5);
}

aside {
  padding: var(--margin);
  margin-top: var(--margin);
  margin-bottom: var(--margin);
}

.table-of-contents {
  display: inline-block;
  margin-top: 5em;
  margin-bottom: 2em;
  padding: var(--margin);
  border: 2px solid rgba(204, 204, 204, 0.5);
  box-shadow: 0px 0px 5px 2px rgba(204, 204, 204, 0.5);
}

ul {
  list-style-type: "🧑🏼‍💻 ";
}

li {
  margin-bottom: 0.8em;
}

ul ul {
  list-style-type: initial;
}

ul ul li {
  margin-bottom: initial;
}

.table-of-contents ul {
  padding-left: 20px;
  padding-right: 20px;
}

.tool {
  margin-top: 3em;
  margin-bottom: 3em;
  line-height: 2em;
}

.tip {
  display: inline-block;
  border: 2px solid rgba(204, 204, 204, 0.5);
  box-shadow: 0px 0px 5px 2px rgba(204, 204, 204, 0.5);
}

.gotcha {
  display: inline-block;
  border: 2px solid rgba(204, 0, 0, 0.5);
  box-shadow: 0px 0px 5px 2px rgba(204, 0, 0, 0.5);
}

.numbered-code {
  display: inline-flex;
  align-items: flex-start;
}

.line-numbers {
  flex: 0 1 40px;
  color: darkgrey;
}

.published-message {
  color: #165c26;
  background-color: #dcffe4;
  border-color: rgba(27, 31, 35, 0.15);
}

.ready-to-be-published-message {
  background-color: #dbedff;
  border: 1px solid rgba(27, 31, 35, 0.15);
}