:root {
  --bg: #fbfaf7;
  --surface: #f2efe8;
  --text: #1f2328;
  --muted: #5b616b;
  --rule: #e2ddd2;
  --accent: #2f5d8a;
  --accent-soft: #e4ecf4;
  --mark: #b4542f;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --grid: rgba(31, 35, 40, 0.06);
  --measure: 40rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15171a;
    --surface: #1e2125;
    --text: #e6e3dc;
    --muted: #a0a4ab;
    --rule: #2e3237;
    --accent: #8db7e0;
    --accent-soft: #1f2a36;
    --mark: #e08a62;
    --grid: rgba(230, 227, 220, 0.05);
  }
}
:root[data-theme="dark"] {
  --bg: #15171a; --surface: #1e2125; --text: #e6e3dc; --muted: #a0a4ab;
  --rule: #2e3237; --accent: #8db7e0; --accent-soft: #1f2a36; --mark: #e08a62;
  --grid: rgba(230, 227, 220, 0.05);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.65;
  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: 2px; }

.wrap { max-width: 46rem; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: 6px 10px; z-index: 10; }

/* Header */
.site-header { border-bottom: 1px solid var(--rule); font-family: var(--sans); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.75rem 1.5rem; padding-top: 1.1rem; padding-bottom: 1.1rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--text); text-decoration: none; }
.brand-mark { flex: none; color: var(--text); }
.brand-name { font-family: var(--mono); font-size: 0.98rem; font-weight: 500; letter-spacing: -0.01em; }
.brand-accent { color: var(--muted); }
.brand-cursor { color: var(--mark); animation: blink 1.2s steps(1) infinite; }
.brand:hover .brand-accent { color: var(--text); }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .brand-cursor { animation: none; } }
.site-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 0.35rem; font-size: 0.9rem; }
.site-nav a { color: var(--muted); text-decoration: none; padding: 0.25rem 0.6rem; border-radius: 999px; }
.site-nav a:hover { color: var(--text); background: var(--surface); }
.site-nav a[aria-current="page"] { color: var(--text); background: var(--surface); box-shadow: inset 0 0 0 1px var(--rule); }

main.wrap { padding-top: 2.5rem; padding-bottom: 4rem; }

/* Type */
h1, h2, h3 { font-family: var(--sans); line-height: 1.2; letter-spacing: -0.02em; font-weight: 600; }
h1 { font-weight: 500; letter-spacing: -0.03em; }
h1 { font-size: clamp(1.9rem, 4.5vw, 2.6rem); margin: 0 0 0.75rem; }
h2 { font-size: 1.5rem; margin: 2.4rem 0 0.75rem; }
h3 { font-size: 1.2rem; margin: 1.8rem 0 0.5rem; }
.eyebrow { font-family: var(--mono); font-size: 0.8rem; font-weight: 500; color: var(--mark); margin: 0 0 0.6rem; }
.eyebrow::before { content: "// "; opacity: 0.7; }
.lede { font-size: 1.25rem; color: var(--muted); margin: 0 0 1.25rem; }
.post-meta { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); }
.dot { margin: 0 0.4rem; }
.badge { font-size: 0.72rem; padding: 0.05rem 0.45rem; border-radius: 4px; border: 1px solid var(--rule); color: var(--muted); }

.prose { max-width: var(--measure); }
.prose p, .prose ul, .prose ol { margin: 0 0 1.15rem; }
.prose li { margin-bottom: 0.4rem; }
.prose blockquote { margin: 1.5rem 0; padding: 0.25rem 0 0.25rem 1.1rem; border-left: 3px solid var(--mark); color: var(--muted); font-style: italic; }
.prose code { font-family: var(--mono); font-size: 0.85em; background: var(--surface); padding: 0.1em 0.35em; border-radius: 4px; }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }
.prose img { max-width: 100%; height: auto; }

/* Home */
.hero { position: relative; padding: 1.5rem 0 2.25rem; border-bottom: 1px solid var(--rule); margin-bottom: 2rem; }
.hero::before { content: ""; position: absolute; inset: -2.5rem -16px 0; z-index: -1; pointer-events: none;
  background-image: radial-gradient(var(--grid) 1.2px, transparent 1.2px); background-size: 18px 18px;
  -webkit-mask-image: linear-gradient(to bottom, #000 30%, transparent); mask-image: linear-gradient(to bottom, #000 30%, transparent); }
.kicker { font-family: var(--mono); font-size: 0.85rem; color: var(--mark); margin: 0 0 0.9rem !important; }
.hero h1 { font-size: clamp(2rem, 5.5vw, 3rem); max-width: 18ch; }
.hero p { max-width: 36rem; color: var(--muted); font-size: 1.2rem; margin: 0; }
.section-title { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); margin: 2.5rem 0 0.5rem; font-weight: 500; letter-spacing: 0; }
.section-title::before { content: "## "; color: var(--mark); }

.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li { padding: 1.25rem 0; border-bottom: 1px solid var(--rule); }
.post-link { font-family: var(--sans); font-size: 1.25rem; font-weight: 500; letter-spacing: -0.015em; color: var(--text); text-decoration: none; line-height: 1.3; }
.post-link:hover { color: var(--accent); }
.post-list .post-meta { margin-top: 0.3rem; }
.post-summary { margin: 0.45rem 0 0; color: var(--muted); font-size: 1.02rem; }

/* Post */
.post-header { margin-bottom: 2rem; }
.note { font-family: var(--sans); font-size: 0.88rem; color: var(--muted); background: var(--surface); border-left: 3px solid var(--mark); border-radius: 0 6px 6px 0; padding: 0.75rem 1rem; margin: 0 0 2rem; max-width: var(--measure); }
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--rule); font-family: var(--sans); font-size: 0.95rem; }
.post-nav a { text-decoration: none; color: var(--text); }
.post-nav a:hover { color: var(--accent); }
.post-nav span { display: block; font-family: var(--mono); font-size: 0.75rem; color: var(--muted); margin-bottom: 0.2rem; }
.post-nav .next { grid-column: 2; text-align: right; }

/* Reading list */
.reading-group { margin-top: 2.5rem; }
.reading-list { list-style: none; padding: 0; margin: 0; }
.reading-list li { padding: 0.9rem 0; border-bottom: 1px solid var(--rule); }
.reading-list a { font-weight: 600; }
.reading-list .who { font-family: var(--mono); font-size: 0.78rem !important; font-size: 0.85rem; color: var(--muted); }
.reading-list p { margin: 0.3rem 0 0; font-size: 1rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--rule); font-family: var(--mono); font-size: 0.78rem !important; font-size: 0.85rem; color: var(--muted); }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1.5rem; padding-top: 1.5rem; padding-bottom: 2rem; }
.footer-inner p { margin: 0; }
.footer-links a { color: var(--muted); margin-left: 1rem; }
.footer-links a:first-child { margin-left: 0; }

@media (max-width: 560px) {
  body { font-size: 1.06rem; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav .next { grid-column: 1; text-align: left; }
}

/* Tables in notes */
.prose table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-family: var(--sans); font-size: 0.92rem; display: block; overflow-x: auto; }
.prose th, .prose td { text-align: left; padding: 0.55rem 0.75rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
.prose th { font-family: var(--mono); font-size: 0.78rem; font-weight: 500; color: var(--muted); background: var(--surface); }