:root {
  --hero-bg-1: #241509;
  --hero-bg-2: #170d05;
  --parchment: #f1e8d7;
  --parchment-2: #e8dcc1;
  --parchment-3: #ded0ae;
  --ink: #2a1b12;
  --ink-soft: #5a4633;
  --ink-faint: #8a7660;
  --brass: #a9793f;
  --brass-bright: #c99a4f;
  --brass-deep: #7c5527;
  --sage: #5f6e46;
  --clay: #9c4f34;
  --line: rgba(42, 27, 18, 0.14);
  --line-hero: rgba(201, 154, 79, 0.35);

  --font-display: "Fraunces", "Iowan Old Style", ui-serif, Georgia, serif;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --radius: 3px;
  --shadow-card: 0 1px 0 rgba(42,27,18,0.06), 0 6px 18px -10px rgba(42,27,18,0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--parchment);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; }

::selection { background: var(--brass-bright); color: var(--hero-bg-2); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 3px;
  border-radius: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 32px;
  background: var(--parchment);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}

.brand-mark { width: 22px; height: 22px; color: var(--clay); flex: none; }
.brand-mark svg { width: 100%; height: 100%; }

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.nav-link {
  font-size: 0.86rem;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 8px 10px;
  border-radius: var(--radius);
  white-space: nowrap;
}

.nav-link:hover { color: var(--ink); background: var(--parchment-2); }
.nav-link.is-active { color: var(--clay); font-weight: 600; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span { width: 100%; height: 2px; background: var(--ink); border-radius: 2px; }

@media (max-width: 860px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--parchment);
    border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px;
    flex-direction: column;
  }
  .site-nav.is-open { display: flex; }
  .nav-toggle { display: flex; }
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 32px 84px;
  background: radial-gradient(120% 140% at 15% 0%, var(--hero-bg-1) 0%, var(--hero-bg-2) 70%);
  color: var(--parchment);
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.55;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='600' height='600' viewBox='0 0 600 600'><g fill='none' stroke='%23c99a4f' stroke-width='0.6' opacity='0.35'><circle cx='120' cy='480' r='60'/><circle cx='120' cy='480' r='110'/><circle cx='120' cy='480' r='165'/><circle cx='120' cy='480' r='225'/><circle cx='500' cy='90' r='50'/><circle cx='500' cy='90' r='95'/><circle cx='500' cy='90' r='150'/></g></svg>");
  background-repeat: no-repeat;
  background-position: -40px 0, right -60px top -40px;
  background-size: 700px 700px;
}

.hero-inner {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass-bright);
  margin-bottom: 22px;
}

.hero-eyebrow::before,
.hero-eyebrow::after {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--brass-bright);
  opacity: 0.6;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 1.04;
  margin: 0 0 20px;
  letter-spacing: -0.01em;
}

.hero-tagline {
  font-size: 1.15rem;
  color: var(--parchment-3);
  max-width: 46ch;
  margin: 0 auto;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px;
}

.intro-block {
  max-width: 62ch;
  margin: 56px auto 8px;
  padding: 0 32px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 64px 0 28px;
}

.section-heading h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 0;
}

.section-heading::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.atlas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
  margin: 0 0 72px;
}

.atlas-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px;
  background: var(--parchment);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  box-shadow: var(--shadow-card);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.atlas-card:hover {
  border-color: var(--brass);
  transform: translateY(-2px);
}

.atlas-card-icon {
  width: 30px;
  height: 30px;
  color: var(--clay);
}
.atlas-card-icon svg { width: 100%; height: 100%; }

.atlas-card-label {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
}

.atlas-card-desc {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.atlas-card-count {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-top: 12px;
}

.specimen-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brass-deep);
  background: var(--parchment-2);
  border: 1px dashed var(--brass);
  border-radius: 2px;
  padding: 3px 8px;
}

.chip-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }

.chip {
  font-size: 0.72rem;
  color: var(--sage);
  background: rgba(95, 110, 70, 0.1);
  border: 1px solid rgba(95, 110, 70, 0.25);
  border-radius: 20px;
  padding: 3px 10px;
}

.collection-head { margin: 56px 0 8px; }

.collection-head h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.7rem);
  margin: 0 0 10px;
}

.collection-head p {
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0 0 40px;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 80px;
}

.entry-card {
  display: flex;
  flex-direction: column;
  background: var(--parchment);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: var(--ink);
  box-shadow: var(--shadow-card);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.entry-card:hover { border-color: var(--brass); transform: translateY(-2px); }

.entry-card-cover {
  height: 130px;
  background-size: cover;
  background-position: center;
  background-color: var(--parchment-3);
}

.entry-card-cover--empty {
  display: flex;
  align-items: center;
  justify-content: center;
}
.entry-card-cover--empty span { width: 30px; height: 30px; color: var(--brass); opacity: 0.6; }
.entry-card-cover--empty svg { width: 100%; height: 100%; }

.entry-card-body { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 8px; }

.entry-card-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 2px 0 0;
}

.entry-card-summary {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.55;
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 64px 24px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--ink-soft);
}

.empty-state-icon { display: inline-block; width: 34px; height: 34px; color: var(--brass); margin-bottom: 14px; }
.empty-state-icon svg { width: 100%; height: 100%; }
.empty-state h3 { font-family: var(--font-display); margin: 0 0 8px; color: var(--ink); }
.empty-state p { max-width: 46ch; margin: 0 auto; font-size: 0.92rem; }
.empty-state code {
  font-family: var(--font-mono);
  background: var(--parchment-2);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.85em;
}

.entry-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 32px 0 0;
  font-size: 0.82rem;
  color: var(--ink-faint);
}
.entry-crumb a { text-decoration: none; color: var(--ink-soft); }
.entry-crumb a:hover { color: var(--clay); }
.crumb-sep { opacity: 0.5; }

.entry-head { margin: 18px 0 48px; max-width: 72ch; }
.entry-head h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.5vw, 3rem);
  margin: 10px 0 14px;
}
.entry-lede { color: var(--ink-soft); font-size: 1.05rem; max-width: 65ch; }

.entry-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 48px;
  padding-bottom: 100px;
  align-items: start;
}

@media (max-width: 800px) {
  .entry-layout { grid-template-columns: 1fr; }
}

.entry-toc {
  position: sticky;
  top: 90px;
}

.entry-toc-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 10px;
}

.entry-toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.entry-toc li { margin: 0; }
.entry-toc a {
  display: block;
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.86rem;
  padding: 6px 0 6px 14px;
  margin-left: -1px;
  border-left: 1px solid transparent;
}
.entry-toc a:hover { color: var(--clay); border-left-color: var(--clay); }

.entry-body { max-width: 72ch; }

.entry-section { margin-bottom: 46px; scroll-margin-top: 90px; }
.entry-section h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.md h3 { font-family: var(--font-display); font-size: 1.12rem; margin: 28px 0 10px; }
.md p { margin: 0 0 14px; }
.md ul, .md ol { margin: 0 0 14px; padding-left: 22px; }
.md li { margin-bottom: 4px; }
.md strong { color: var(--ink); }
.md em { color: var(--clay); font-style: italic; }

.md blockquote {
  margin: 18px 0;
  padding: 4px 18px;
  border-left: 3px solid var(--brass);
  color: var(--ink-soft);
  font-style: italic;
}

.md pre {
  background: var(--hero-bg-2);
  color: var(--parchment-2);
  padding: 16px 18px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  margin: 0 0 18px;
}
.md code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--parchment-2);
  padding: 1px 5px;
  border-radius: 3px;
}
.md pre code { background: none; padding: 0; }

.md table {
  width: 100%;
  border-collapse: collapse;
  margin: 6px 0 22px;
  font-size: 0.88rem;
}
.md th, .md td {
  border: 1px solid var(--line);
  padding: 8px 12px;
  text-align: left;
}
.md th {
  background: var(--parchment-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.md tr:nth-child(even) td { background: rgba(42,27,18,0.02); }

.md hr { border: none; border-top: 1px solid var(--line); margin: 32px 0; }

.muted { color: var(--ink-faint); }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 32px 40px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--ink-faint);
}