:root {
  --ink: #2b2520;
  --ink-soft: #5c5248;
  --paper: #faf6ef;
  --paper-alt: #f0e9db;
  --accent: #8a4f2c;
  --accent-dark: #6b3b1f;
  --line: #ddd2bd;
  --max-width: 820px;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Georgia", "Iowan Old Style", "Palatino Linotype", serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
}

header.site-header {
  background: var(--paper-alt);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  font-size: 1.4rem;
}

.brand-name {
  font-weight: bold;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}

nav.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  margin-left: 1.25rem;
  font-size: 0.95rem;
  font-family: "Helvetica Neue", Arial, sans-serif;
  border-bottom: 1px solid transparent;
}

nav.site-nav a:hover,
nav.site-nav a[aria-current="page"] {
  color: var(--accent-dark);
  border-bottom-color: var(--accent);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.page-intro {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.page-intro h1 {
  margin-bottom: 0.3rem;
  font-size: 2.1rem;
}

.meta {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

h2 {
  margin-top: 2.4rem;
  font-size: 1.35rem;
  color: var(--accent-dark);
  border-left: 4px solid var(--accent);
  padding-left: 0.6rem;
}

h3 {
  margin-top: 1.5rem;
  font-size: 1.05rem;
}

a { color: var(--accent-dark); }

p, li { color: var(--ink); }

ul, ol { padding-left: 1.3rem; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.92rem;
}

th, td {
  border: 1px solid var(--line);
  padding: 0.6rem 0.7rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--paper-alt);
}

.callout {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.92rem;
}

.toc {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.92rem;
}

.toc ol { margin: 0.4rem 0 0; }

#back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 42px;
  height: 42px;
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

#back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

footer.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper-alt);
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.card {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, sans-serif;
}

.card h3 {
  margin-top: 0;
  color: var(--accent-dark);
}

.card span {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

code {
  background: var(--paper-alt);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.9em;
}