:root {
  --bg: #f7f3eb;
  --paper: #fffaf2;
  --ink: #171717;
  --muted: #66615a;
  --line: #d8d0c3;
  --accent: #0f4c5c;
  --accent-soft: #dfeff0;
  --gold: #8a6f2a;
  --max: 1180px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-color: rgba(15, 76, 92, .35);
  text-underline-offset: 3px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  padding: 22px 24px 18px;
  background: rgba(247,243,235,.96);
  backdrop-filter: blur(6px);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
}

.brand {
  font-size: clamp(2rem, 5vw, 4.5rem);
  line-height: .9;
  letter-spacing: -0.06em;
  font-weight: 700;
}

.tagline {
  max-width: 520px;
  color: var(--muted);
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  font-size: .95rem;
}

.main-nav {
  max-width: var(--max);
  margin: 14px auto 0;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  font-size: .86rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 24px;
}

.home-grid {
  display: grid;
  grid-template-columns: 1fr 1.75fr 1fr;
  gap: 28px;
  align-items: start;
}

.panel {
  border-top: 3px solid var(--ink);
  padding-top: 14px;
}

.panel h2,
.panel h3 {
  margin: 0 0 12px;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .12em;
}

.bio {
  font-size: 1rem;
  color: #2a2824;
}

.featured article {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 28px;
}

.kicker {
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--accent);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.featured h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.8rem, 3vw, 3.2rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
  margin: 10px 0 16px;
}

.abstract {
  font-size: 1.14rem;
  color: #333;
  border-left: 4px solid var(--accent);
  padding-left: 14px;
}

.meta {
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--muted);
  font-size: .86rem;
}

.side-section {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  margin-top: 20px;
}

.link-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.link-list li {
  border-bottom: 1px solid var(--line);
  padding: 9px 0;
  font-size: .97rem;
}

.quote-card {
  margin-top: 24px;
  padding: 18px;
  background: var(--accent-soft);
  border-left: 5px solid var(--accent);
  font-size: 1.15rem;
  line-height: 1.45;
}

.article-list {
  margin-top: 36px;
  border-top: 3px solid var(--ink);
  padding-top: 18px;
}

.article-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.article-item h2 {
  margin: 0 0 4px;
  font-size: 1.55rem;
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.article-layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 34px 24px;
  display: grid;
  grid-template-columns: minmax(0, 700px) 240px;
  gap: 46px;
}

.article-body {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: clamp(24px, 4vw, 54px);
}

.article-body h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: .98;
  letter-spacing: -0.055em;
  margin: 8px 0 20px;
}

.article-body h2 {
  margin-top: 2.1em;
  font-size: 1.55rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.article-body p {
  margin: 1.25em 0;
}

.article-body p,
.article-body li {
  font-size: 1.12rem;
}

.article-body blockquote {
  margin: 28px 0;
  padding: 16px 20px;
  border-left: 5px solid var(--gold);
  background: #f5eddb;
  font-size: 1.18rem;
  font-style: italic;
}

.concept-box {
  margin: 28px 0;
  padding: 18px 20px;
  background: var(--accent-soft);
  border-left: 5px solid var(--accent);
}

.concept-box strong {
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  text-transform: uppercase;
  font-size: .78rem;
  letter-spacing: .12em;
}

pre {
  overflow-x: auto;
  padding: 18px;
  background: #24211d;
  color: #f7f3eb;
  border: 1px solid #3a342c;
  border-radius: 3px;
  font-size: .92rem;
  line-height: 1.5;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: .92em;
}

p code,
li code {
  background: #eee5d8;
  padding: 2px 5px;
  border-radius: 3px;
}

.math-block {
  margin: 28px 0;
  padding: 18px 20px;
  background: #fbf7ed;
  border: 1px solid var(--line);
  text-align: center;
  font-size: 1.15rem;
}

.figure-box {
  margin: 30px 0;
  padding: 16px;
  border: 1px solid var(--line);
  background: #fbf7ed;
}

.figure-box figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  font-size: .86rem;
}

.toc {
  position: sticky;
  top: 18px;
  align-self: start;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  font-size: .88rem;
  color: var(--muted);
  border-top: 3px solid var(--ink);
  padding-top: 12px;
  opacity: .78;
}

.toc h3 {
  margin: 0 0 10px;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .75rem;
}

.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc li {
  margin: 8px 0;
}

.source-card {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 20px;
  margin: 18px 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 30px 24px;
  color: var(--muted);
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  font-size: .9rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
}

@media (max-width: 900px) {
  .home-grid,
  .article-layout,
  .article-item {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
    order: -1;
  }

  .header-inner {
    display: block;
  }
}