:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1b1d1c;
  --muted: #5d625f;
  --line: #e4e1d8;
  --accent: #1d3b33;
  --accent-soft: #e9efe9;
  --serif: "Iowan Old Style", "Charter", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --measure: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131615;
    --surface: #1a1e1c;
    --ink: #e8e6e0;
    --muted: #a3a8a4;
    --line: #2c322f;
    --accent: #9cc9b6;
    --accent-soft: #1f2a26;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 1.25rem; }

.skip { position: absolute; left: -999px; top: 0; }
.skip:focus { left: 1rem; top: 1rem; background: var(--surface); padding: 0.5rem 0.75rem; z-index: 10; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding-top: 1.1rem; padding-bottom: 1.1rem;
  font-family: var(--sans); font-size: 0.95rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--ink); text-decoration: none; font-weight: 650; letter-spacing: -0.01em; }
.brand-mark {
  display: inline-grid; place-items: center; width: 2rem; height: 2rem; border-radius: 0.5rem;
  background: #1d3b33; color: #f4efe3; font-family: var(--serif); font-weight: 700; font-size: 0.85rem; letter-spacing: -0.02em;
}
nav[aria-label="Principal"] { display: flex; gap: 1.25rem; }
nav[aria-label="Principal"] a { color: var(--muted); text-decoration: none; }
nav[aria-label="Principal"] a:hover, nav[aria-label="Principal"] a[aria-current="page"] { color: var(--ink); }
nav[aria-label="Principal"] a[aria-current="page"] { text-decoration: underline; text-underline-offset: 0.4em; }

main { padding-top: 3rem; padding-bottom: 4rem; }

/* Headings */
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.015em; text-wrap: balance; }
h1 { font-size: clamp(2rem, 1.4rem + 2.6vw, 2.75rem); margin: 0 0 1rem; font-weight: 700; }
h2 { font-size: 1.45rem; margin: 2.6rem 0 0.75rem; }
h3 { font-size: 1.15rem; }

/* Home */
.hero { margin-bottom: 3rem; }
.lede p, p.lede { font-size: 1.25rem; color: var(--muted); margin: 0; }
.section-title {
  font-family: var(--sans); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted); font-weight: 600; margin: 0 0 1rem;
}
.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.cards a {
  display: block; padding: 1.35rem 1.4rem; border: 1px solid var(--line); border-radius: 14px;
  background: var(--surface); color: inherit; text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.cards a:hover { border-color: var(--accent); transform: translateY(-1px); }
.cards h3 { margin: 0 0 0.4rem; font-size: 1.3rem; }
.cards p { margin: 0 0 0.75rem; color: var(--muted); font-size: 1rem; line-height: 1.6; }
.cards .more { font-family: var(--sans); font-size: 0.9rem; color: var(--accent); font-weight: 600; }
.note { margin-top: 2rem; color: var(--muted); font-size: 0.95rem; }

/* Article */
.post-header { margin-bottom: 2rem; }
.meta { font-family: var(--sans); font-size: 0.85rem; color: var(--muted); margin: 0 0 0.75rem; letter-spacing: 0.02em; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.15rem; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin: 0.35rem 0; }
.prose li::marker { color: var(--muted); }
.prose strong { font-weight: 700; }
.prose > p:last-child em:only-child {
  display: block; margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 0.95rem;
}
.about .prose > p:first-child { font-size: 1.3rem; }

/* Tables */
.table-wrap {
  margin: 1.5rem 0 1.75rem; overflow-x: auto; -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line); border-radius: 12px; background: var(--surface);
}
table {
  width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: 0.95rem;
  line-height: 1.45; font-variant-numeric: tabular-nums;
}
th, td { padding: 0.7rem 1rem; text-align: left; vertical-align: top; }
thead th {
  background: var(--accent-soft); color: var(--ink); font-weight: 650; font-size: 0.82rem;
  text-transform: uppercase; letter-spacing: 0.05em; border-bottom: 1px solid var(--line);
}
tbody tr + tr td { border-top: 1px solid var(--line); }
tbody tr:last-child td { font-weight: inherit; }
td strong { color: var(--accent); }

@media (max-width: 560px) {
  body { font-size: 1.0625rem; }
  main { padding-top: 2rem; }
  th, td { padding: 0.6rem 0.7rem; }
  table { font-size: 0.88rem; }
  thead th { font-size: 0.72rem; }
  .cards a { padding: 1.1rem 1.15rem; }
}

/* Pager */
.pager {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 3.5rem;
  padding-top: 2rem; border-top: 1px solid var(--line);
}
.pager a { display: block; text-decoration: none; color: var(--ink); font-size: 1rem; line-height: 1.4; }
.pager a span { display: block; font-family: var(--sans); font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.3rem; }
.pager a:hover { color: var(--accent); }
.pager .next { text-align: right; }
@media (max-width: 560px) { .pager { grid-template-columns: 1fr; } .pager .next { text-align: left; } }

/* Footer */
.site-footer { border-top: 1px solid var(--line); }
.site-footer .wrap {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1.5rem;
  padding-top: 1.5rem; padding-bottom: 2rem; font-family: var(--sans); font-size: 0.85rem; color: var(--muted);
}
.site-footer p { margin: 0; }