:root {
  --font-serif: "Charter", "Bitstream Charter", "Sitka Text", "Cambria", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --color-bg: #fcfbf9;
  --color-surface: #ffffff;
  --color-border: #e8e5de;
  --color-text-main: #1f2421;
  --color-text-muted: #5c645e;
  --color-brand: #1b3b36;
  --color-brand-light: #2b5750;
  --color-accent: #8b5e34;
  --color-disclaimer-bg: #f7f5ef;
  --color-disclaimer-border: #ded9cb;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-serif);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.75;
  font-size: 1.125rem;
  -webkit-font-smoothing: antialiased;
}
header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.brand {
  text-decoration: none;
  color: var(--color-brand);
  display: flex;
  flex-direction: column;
}
.brand-title {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.brand-sub {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
nav a {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-left: 1.5rem;
  font-weight: 500;
  transition: color 0.15s ease;
}
nav a:hover, nav a.active {
  color: var(--color-brand);
}
.main-wrapper {
  max-width: 820px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 5rem 1.5rem;
}
.hub-hero {
  margin-bottom: 3.5rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2.5rem;
}
.hub-tag {
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: block;
}
h1 {
  font-size: 2.35rem;
  line-height: 1.25;
  color: var(--color-brand);
  margin-bottom: 1.25rem;
  font-weight: 700;
}
h2 {
  font-size: 1.5rem;
  line-height: 1.35;
  color: var(--color-brand);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 600;
}
p {
  margin-bottom: 1.35rem;
}
.lead {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}
.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  text-decoration: none;
  display: block;
  color: inherit;
}
.article-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.04);
}
.article-card h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--color-brand);
  font-size: 1.4rem;
}
.article-meta {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}
.article-desc {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 1rem;
}
.read-more {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-brand-light);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.disclaimer-box {
  background: var(--color-disclaimer-bg);
  border-left: 4px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  margin: 2.5rem 0;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  line-height: 1.6;
  color: #49453c;
  border-radius: 0 6px 6px 0;
}
.disclaimer-box strong {
  color: #2b261d;
}
.author-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.75rem;
  margin-top: 3.5rem;
  display: flex;
  gap: 1.5rem;
  align-items: center;
  font-family: var(--font-sans);
}
.author-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--color-border);
}
.author-info h3 {
  font-size: 1.1rem;
  color: var(--color-brand);
  margin-bottom: 0.35rem;
  font-weight: 700;
}
.author-info p {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}
.author-link {
  font-size: 0.85rem;
  color: var(--color-brand-light);
  font-weight: 600;
  text-decoration: none;
}
.author-link:hover { text-decoration: underline; }
table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-family: var(--font-sans);
  font-size: 0.95rem;
}
th, td {
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
}
th {
  background: #f4f2ec;
  font-weight: 600;
  color: var(--color-brand);
}
ul, ol {
  margin: 1.25rem 0 1.5rem 2rem;
}
li {
  margin-bottom: 0.5rem;
}
.references-section {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}
.references-section h3 {
  font-size: 1rem;
  color: var(--color-brand);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}
.references-section ol {
  margin-left: 1.5rem;
}
.references-section li {
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
}
.references-section a {
  color: var(--color-brand-light);
  text-decoration: none;
}
.references-section a:hover { text-decoration: underline; }
footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 3rem 1.5rem;
  margin-top: 4rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
}
.footer-links {
  margin-bottom: 1.25rem;
}
.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  margin: 0 0.85rem;
}
.footer-links a:hover { color: var(--color-brand); }