/* Minimal encyclopedia-style layout for long-form reading */
:root {
  --text: #202122;
  --muted: #54595d;
  --border: #a2a9b1;
  --soft: #eaecf0;
  --link: #0645ad;
  --bg: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", Times, serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--soft);
  padding: 0.85rem 1rem;
  background: #fff;
}

.site-header-inner {
  max-width: 1400px;
  margin: 0 auto;
}

.site-title {
  margin: 0;
  font-size: 1.15rem;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 700;
}

.site-subtitle {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.9rem;
}

.layout {
  max-width: 1400px;
  margin: 1rem auto 3rem;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 1.2rem;
  padding: 0 1rem;
}

.toc {
  border: 1px solid var(--soft);
  background: #f8f9fa;
  align-self: start;
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 2rem);
  overflow: auto;
  padding: 0.75rem;
}

.toc h2 {
  margin: 0 0 0.65rem;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.98rem;
}

.toc ol {
  margin: 0;
  padding-left: 1.2rem;
}

.toc li {
  margin: 0.3rem 0;
  font-size: 0.92rem;
}

.content {
  min-width: 0;
}

.article {
  border: 1px solid var(--soft);
  padding: 1.25rem 1.4rem;
}

.article h1 {
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.25;
  margin-top: 0;
  margin-bottom: 0.25rem;
  font-size: 2.05rem;
  font-weight: 400;
}

.article-meta {
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.92rem;
  margin-bottom: 1rem;
}

.article h2 {
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 600;
  border-bottom: 1px solid var(--soft);
  padding-bottom: 0.2rem;
  margin-top: 2rem;
  margin-bottom: 0.7rem;
  font-size: 1.5rem;
}

.article h3 {
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 600;
  margin-top: 1.35rem;
  margin-bottom: 0.35rem;
  font-size: 1.15rem;
}

.article p,
.article li {
  font-size: 1.03rem;
}

.lead {
  font-size: 1.08rem;
}

.note-box {
  border: 1px solid var(--border);
  background: #f8f9fa;
  padding: 0.75rem 0.9rem;
  margin: 0.9rem 0 1.2rem;
  font-size: 0.96rem;
}

.info-box {
  float: right;
  width: 310px;
  border: 1px solid var(--border);
  margin: 0 0 1rem 1rem;
  background: #f8f9fa;
}

.info-box h3 {
  margin: 0;
  padding: 0.6rem;
  background: #dce8f7;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.info-box table {
  width: 100%;
  border-collapse: collapse;
}

.info-box th,
.info-box td {
  border-top: 1px solid var(--border);
  padding: 0.45rem 0.55rem;
  text-align: left;
  font-size: 0.92rem;
  vertical-align: top;
}

.figure {
  margin: 1rem 0;
  border: 1px solid var(--soft);
  background: #fff;
}

.figure img {
  display: block;
  width: 100%;
  height: auto;
}

.figure figcaption {
  font-size: 0.9rem;
  color: var(--muted);
  padding: 0.55rem 0.65rem;
  border-top: 1px solid var(--soft);
  font-family: Arial, Helvetica, sans-serif;
}

.footer-nav {
  border-top: 1px solid var(--soft);
  margin-top: 2rem;
  padding-top: 0.9rem;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.92rem;
}

.simple-page {
  max-width: 900px;
  margin: 2rem auto;
  border: 1px solid var(--soft);
  padding: 1.2rem;
}

.simple-page h1 {
  margin-top: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 500;
}

@media (max-width: 1060px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
    max-height: none;
  }

  .info-box {
    float: none;
    width: 100%;
    margin: 0 0 1rem;
  }
}