/* Variables */
:root {
  --header-bg: #1d1d1d;
  --accent-red: #f81732;
  --body-bg: #e7e6e6;
  --content-bg: #ffffff;
  --text-color: #1a1a1a;
  --link-color: #1a1a1a;
  --border-color: #e6e6e6;
  --muted-color: #999;
  --blockquote-text: #606060;
}

/* Base Layout */
html {
  background-color: var(--body-bg);
}

body {
  background-color: var(--content-bg);
  color: var(--text-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1em;
  line-height: 1.5;
  margin: 0 auto;
  max-width: 36em;
  padding: 50px;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.08);
}

/* Landing page: wider layout, no body padding */
body:not(:has(.article-header)) {
  max-width: 900px;
  padding: 0;
}

body:not(:has(.article-header)) p,
body:not(:has(.article-header)) h2,
body:not(:has(.article-header)) h3 {
  margin: 20px;
}

/* Landing Page — Header Banner */
body:not(:has(.article-header)) > h2:first-of-type {
  background-color: var(--header-bg);
  color: #ffffff;
  text-transform: uppercase;
  font-size: 2em;
  font-weight: bold;
  letter-spacing: 0.15em;
  text-align: center;
  padding: 40px 20px 16px;
  margin: 0;
}

/* Landing Page — Navigation */
body:not(:has(.article-header)) > h2:first-of-type + p {
  background-color: var(--header-bg);
  text-align: center;
  padding: 8px 20px 24px;
  margin: 0;
}

body:not(:has(.article-header)) > h2:first-of-type + p a {
  color: #ffffff;
  text-transform: uppercase;
  text-decoration: none;
  font-size: 0.8em;
  letter-spacing: 0.08em;
  margin: 0 10px;
  transition: color 0.2s;
}

body:not(:has(.article-header)) > h2:first-of-type + p a:hover {
  color: var(--accent-red);
}

/* Landing Page — Sub-heading (Volume/Issue) */
body:not(:has(.article-header)) > h3:first-of-type {
  color: var(--accent-red);
  text-transform: uppercase;
  font-size: 1.1em;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin: 30px 20px 8px;
}

/* Landing Page — Editor Credit */
body:not(:has(.article-header)) > h3:first-of-type + p {
  font-style: italic;
  color: #666;
  margin: 0 20px 20px;
}

/* Landing Page — Divider */
body:not(:has(.article-header)) > h2:first-of-type ~ hr {
  border: none;
  border-top: 1px dashed #ccc;
  height: auto;
  background: none;
  margin: 0 20px 20px;
}

/* Landing Page — Contribution List */
body:not(:has(.article-header)) > h2:first-of-type ~ ul {
  list-style: none;
  padding: 0 20px;
  margin: 0 0 40px;
}

body:not(:has(.article-header)) > h2:first-of-type ~ ul li {
  padding: 14px 0;
  border-top: 1px solid #eee;
  line-height: 1.5;
  font-weight: 500;
}

body:not(:has(.article-header)) > h2:first-of-type ~ ul li:first-child {
  border-top: none;
}

body:not(:has(.article-header)) > h2:first-of-type ~ ul li em {
  font-weight: normal;
}

/* Landing Page — Format Links */
body:not(:has(.article-header)) > h2:first-of-type ~ ul li a {
  font-size: 0.72em;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--muted-color);
  margin-left: 6px;
  transition: opacity 0.2s;
}

body:not(:has(.article-header)) > h2:first-of-type ~ ul li a:hover {
  opacity: 0.7;
}

/* Web link (first link) — accent red */
body:not(:has(.article-header)) > h2:first-of-type ~ ul li > a {
  color: var(--accent-red);
}

body:not(:has(.article-header)) > h2:first-of-type ~ ul li > a:hover {
  opacity: 0.8;
}

/* Article Site Header */
.site-header {
  background-color: var(--header-bg);
  padding: 16px 50px;
  display: flex;
  align-items: baseline;
  gap: 24px;
  margin: -50px -50px 30px;
}

.site-header a:first-child {
  color: #ffffff;
  text-transform: uppercase;
  font-size: 0.85em;
  font-weight: bold;
  letter-spacing: 0.12em;
  text-decoration: none;
}

.site-header a:not(:first-child) {
  color: #ffffff;
  text-transform: uppercase;
  font-size: 0.72em;
  letter-spacing: 0.08em;
  text-decoration: none;
  opacity: 0.8;
}

.site-header a:hover {
  opacity: 1;
  color: var(--accent-red);
}

/* Article Title */
.article-header > h2 {
  font-size: 2em;
  font-weight: bold;
  margin-top: 0;
  line-height: 1.2;
}

/* Article Author */
.article-header > h3 {
  font-size: 1.2em;
  font-weight: normal;
  margin-top: 0.3em;
  margin-bottom: 1.5em;
  color: #555;
}

/* Article Abstract */
.abstract {
  color: var(--blockquote-text);
  margin: 0 1.5em 1.5em;
  font-style: italic;
}

/* General Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-color);
  font-weight: normal;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}

/* General Links */
a {
  color: var(--link-color);
  text-decoration: underline;
}

a:hover {
  opacity: 0.7;
}

/* General Lists */
ul, ol {
  padding-left: 2em;
  margin: 1em 0;
}

/* Media */
img, video {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5em 0;
}

/* Code */
code {
  font-family: 'Courier New', monospace;
  background-color: #f5f5f5;
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
}

/* Blockquotes */
blockquote {
  margin: 1.5em 0 1.5em 1em;
  padding: 0.5em 1.5em;
  border-left: 5px solid var(--border-color);
  color: var(--blockquote-text);
  font-style: italic;
}

/* HR (general) */
hr {
  height: 1px;
  background-color: var(--border-color);
  border: none;
}

/* Endnotes */
section[role="doc-endnotes"] {
  margin-top: 2em;
  padding-top: 1em;
  border-top: 1px solid var(--border-color);
  padding-bottom: 2em;
  margin-bottom: 4em;
}

section[role="doc-endnotes"] ol li a[role="doc-backlink"] {
  padding-right: 0.2em;
}

/* Responsive */
@media (max-width: 600px) {
  body {
    padding: 20px;
    font-size: 0.9em;
    max-width: 100%;
    box-shadow: none;
  }

  body:not(:has(.article-header)) > h2:first-of-type {
    font-size: 1.4em;
    padding: 24px 12px 10px;
  }

  body:not(:has(.article-header)) > h2:first-of-type + p {
    padding: 6px 12px 18px;
  }

  body:not(:has(.article-header)) > h2:first-of-type + p a {
    font-size: 0.7em;
    margin: 0 6px;
  }

  body:not(:has(.article-header)) > h3:first-of-type {
    margin: 20px 12px 6px;
  }

  body:not(:has(.article-header)) > h3:first-of-type + p,
  body:not(:has(.article-header)) > h2:first-of-type ~ hr {
    margin-left: 12px;
    margin-right: 12px;
  }

  body:not(:has(.article-header)) > h2:first-of-type ~ ul {
    padding: 0 12px;
  }

  body:not(:has(.article-header)) > h2:first-of-type ~ ul li {
    padding: 10px 0;
  }
}