/**
 * Variables.
 */

:root {
  --accent: #3D93F6;
  --black: #113654;
  --light-black: #485d6f;
  --gray: #A7AEB4;
  --light-gray: #E7E9EB;
}

/**
 * Reset.
 */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  padding: 0;
  font-size: inherit;
  font-weight: inherit;
}

ol,
ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

p {
  margin: 0;
}

/**
 * Type.
 */

html {
  /*font-size: 18px;*/
  font-family: Roboto, sans-serif;
  line-height: 1.6;
  color: var(--black);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code,
pre {
  font-family: 'Roboto Mono', monospace;
}

/**
 * Links.
 */

a {
  color: var(--accent);
  text-decoration: none;
  cursor: pointer;
}

a:hover {
  text-decoration: underline;
}

/**
 * Header.
 */

.header {
  padding: 36px 12px 24px 12px;
  text-align: center;
}

/**
 * Footer.
 */

.footer {
  padding: 72px 12px;
  text-align: center;
}

.footer .author-gravatar {
  height: 100px;
  width: 100px;
}

/**
 * Author.
 */

.author-gravatar {
  display: inline-block;
  width: 50px;
  height: 50px;
  border-radius: 100%;
  margin-bottom: 6px;
}

.author-name {
  font-size: 18px;
  line-height: 1;
}

.author-link {
  color: inherit;
}

.author-link:hover {
  color: var(--accent);
  text-decoration: none;
}

.author-bio {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray);
}

.author-twitter {
  position: relative;
  display: block;
  margin-top: 6px;
  min-height: 28px; /* prevent vertical glitching as button loads */
  background-color: white;
}

.author-twitter-mask-color {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: var(--gray);
  pointer-events: none;
  mix-blend-mode: color;
}

.author-twitter-mask-lighten {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: rgba(255,255,255,.5);
  pointer-events: none;
  mix-blend-mode: lighten;
}

@supports not (mix-blend-mode: color) {
  .author-twitter-mask-color,
  .author-twitter-mask-lighten {
    display: none;
  }
}

/**
 * Main.
 */

.main {
  padding: 0px 18px 72px;
  margin: 0 auto;
  max-width: 38em;
}

/**
 * Index.
 */

.index-season-list > li + li {
  margin-top: 48px;
}

.index-season-name {
  display: block;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray);
}

.index-article-title {
  font-size: 26px;
  line-height: 1.3;
  margin-top: 24px;
  margin-bottom: 2px !important;
}

.index-article-link {
  font-weight: inherit;
  color: inherit;
}

.index-article-link:hover {
  color: var(--accent);
  text-decoration: none;
}

.index-article-excerpt {
  color: var(--light-black);
}

.index-thumbnail {
  margin-top: 26px;
  width: auto;
}

.index-thumbnail > figure {
  margin: 0;
}

.index-thumbnail > figure > img {
  width: 100%;
}

/**
 * Article.
 */

.article-title {
  font-size: 42px;
  line-height: 1.3;
  text-align: center;
  margin-bottom: 6px;
}

.article-link {
  color: inherit;
  font-weight: inherit;
}

.article-link:hover {
  color: var(--accent);
  text-decoration: none;
}

.article-date {
  display: block;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray);
  text-align: center;
  margin-bottom: 24px;
}

.article-body {
  position: relative;
}

/**
 * Error.
 */

.error {
  text-align: center;
}

/**
 * Spacing.
 */

.article-body > *:not(:last-child) {
  margin-bottom: 1em;
}

/**
 * Headings.
 */

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4,
.article-body h5,
.article-body h6 {
  line-height: 1.2;
  font-weight: 500;
}

.article-body h1 {
  font-size: 42px;
  margin-top: 96px;
}

.article-body h2 {
  font-size: 26px;
  margin-top: 36px;
  margin-bottom: 6px !important;
}

.article-body h3 {
  margin-top: 36px;
  margin-bottom: 6px !important;
}

.article-body h4,
.article-body h5,
.article-body h6 {
  margin-top: 36px;
  font-size: 16px;
  text-transform: uppercase;
  margin-bottom: 2px !important;
}

/**
 * Links.
 */

.article-body a:hover {
  cursor: pointer;
  text-decoration: none;
  background-image: linear-gradient(to bottom, rgba(0,0,0,0) 50%, var(--accent) 50%);
  background-repeat: repeat-x;
  background-size: 2px 2px;
  background-position: 0 1em;
}

/**
 * Emphasis.
 */

.article-body strong {
  font-weight: 600;
}

/**
 * Quotes.
 */

.article-body blockquote {
  margin-left: 0;
  margin-right: 0;
  position: relative;
  padding-left: 18px;
  color: var(--gray);
  font-style: italic;
}

.article-body blockquote em {
  font-style: normal;
}

.article-body blockquote::after {
  content: '';
  position: absolute;
  top: 0.333em;
  bottom: 0.333em;
  left: 0;
  border-left: 2px solid var(--gray);
  opacity: 0.6;
}

/**
 * Asides.
 */

.article-body aside {
  display: block;
  font-size: 0.8em;
  font-style: italic;
  color: var(--gray);
}

/**
 * Rules.
 */

.article-body hr {
  border: none;
  height: 2px;
  width: 10%;
  background: var(--light-gray);
  margin: 72px auto !important;
}

/**
 * Lists.
 */

.article-body ol,
.article-body ul {
  list-style-position: outside;
  margin-left: 24px;
}

.article-body ol,
.article-body ol ol ol ol {
  list-style-type: decimal;
}

.article-body ol ol,
.article-body ol ol ol ol ol {
  list-style-type: lower-alpha;
}

.article-body ol ol ol,
.article-body ol ol ol ol ol ol {
  list-style-type: lower-roman;
}

.article-body ul,
.article-body ul ul ul ul {
  list-style-type: disc;
}

.article-body ul ul,
.article-body ul ul ul ul ul {
  list-style-type: circle;
}

.article-body ul ul ul,
.article-body ul ul ul ul ul ul {
  list-style-type: square;
}

.article-body li {
  margin: 6px 0;
}

/**
 * Media.
 */

.article-body figure {
  margin: 1.5em 0 !important;
}

.article-body img {
  display: block;
  max-width: 100%;
  margin-right: auto;
  margin-left: auto;
}

.article-body figcaption {
  display: block;
  color: var(--gray);
  font-size: 0.8em;
  margin-top: 0.5em;
  text-align: center;
  font-style: italic;
}

/**
 * Code.
 */

.article-body code,
.article-body pre {
  background-color: #EFF1F2;
  border-radius: 4px;
}

.article-body code {
  padding: 0 3px 1px;
  font-size: 0.8em;
  /* have to pull them up to offset the smaller font-size */
  position: relative;
  top: -1px;
}

.article-body pre code {
  padding: 0;
  border: none;
}

.article-body pre {
  font-size: 16px;
  line-height: 1.2;
  padding: 18px 24px;
  white-space: pre-wrap;
}

/**
 * Tables.
 */

.article-body table {
  width: 100%;
  border-collapse: collapse;
  border: none;
  /* mimic paragraph margins */
  margin: 1.5em 0 !important;
}

.article-body tr {
  border-bottom: 1px solid var(--light-gray);
}

.article-body tr:first-child {
  border-top: 3px solid var(--light-gray);
}

.article-body tr:last-child {
  border-bottom: 3px solid var(--light-gray);
}

.article-body td {
  padding: 0.333em 0;
}

/**
 * Navigation.
 */

.nav {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 12px;
  overflow: hidden;
}

.nav > * {
  float: left;
}

.nav-mark {
  width: 100px;
  text-align: center;
  line-height: 2.5em; /* vertically centered */
}

.nav-mark:only-child {
  float: none;
  width: auto;
}

.nav-icon {
  display: inline-block;
}

.nav-previous,
.nav-next {
  width: calc(50% - 50px);
}

.nav-previous {
  text-align: right;
}

.nav-next {
  text-align: left;
}

.nav-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray);
}

.nav-link {
  color: inherit;
}

.nav-link:hover {
  color: var(--accent);
  text-decoration: none;
}