/* postora.org — one stylesheet. Monochrome: off-white paper, warm near-black ink. */
:root {
  --paper: #fbfbfb;
  --ink: #342e2e;
  --ink-soft: #5e5656;
  --rule: #e2dfdf;
  --tint: #f2f0f0;
  --serif: "Crimson Pro", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --measure: 44rem;
  --wide: 72rem;
  --gutter: 1rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  letter-spacing: -0.01em;
  overflow-wrap: break-word;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: .5rem 1rem; }
.skip:focus { left: var(--gutter); }

/* Header */
.site-header { border-bottom: 1px solid var(--rule); }
.site-header .bar {
  max-width: var(--wide); margin: 0 auto; padding: .9rem var(--gutter);
  display: flex; align-items: center; gap: .75rem 1.5rem; flex-wrap: wrap;
}
.wordmark { font-family: var(--serif); font-size: 1.6rem; font-weight: 400; letter-spacing: -0.02em; text-decoration: none; line-height: 1; }
.site-nav { display: flex; flex-wrap: wrap; gap: .25rem 1.1rem; font-size: .95rem; flex: 1 1 auto; }
.site-nav a { text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { text-decoration: underline; }

/* Buttons */
.btn {
  display: inline-block; background: var(--ink); color: var(--paper);
  border-radius: 300px; padding: .7rem 1.4rem; font-weight: 500; font-size: .95rem;
  text-decoration: none; line-height: 1.2; letter-spacing: 0;
}
.btn:hover { background: #1f1b1b; }
.site-header .btn { padding: .55rem 1.1rem; font-size: .9rem; margin-left: auto; }
.cta { margin: 2.5rem 0; padding: 1.5rem; background: var(--tint); border-radius: 1rem; }
.cta p { margin: 0 0 1rem; }
.cta .note { display: block; margin-top: .6rem; font-size: .88rem; color: var(--ink-soft); }

/* Layout */
main { display: block; }
.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 var(--gutter); }
.prose { max-width: var(--measure); margin: 0 auto; padding: 0 var(--gutter); }
.page-head { max-width: var(--measure); margin: 0 auto; padding: 3rem var(--gutter) 1.5rem; }
.post-head { max-width: 56rem; margin: 0 auto; padding: 3rem var(--gutter) 1.5rem; text-align: center; }
.kicker { font-size: .85rem; color: var(--ink-soft); margin: 0 0 1rem; }

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 300; letter-spacing: -0.03em; line-height: 1.08; margin: 2.2em 0 .5em; }
h1 { font-size: clamp(2.5rem, 7vw, 5.25rem); margin: 0 0 1rem; }
h2 { font-size: clamp(1.9rem, 4.2vw, 3rem); }
h3 { font-size: clamp(1.4rem, 2.8vw, 1.9rem); letter-spacing: -0.02em; line-height: 1.15; }
h4 { font-family: var(--sans); font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; }
.prose > :first-child { margin-top: 0; }
p, ul, ol, table, figure, blockquote { margin: 0 0 1.2rem; }
ul, ol { padding-left: 1.3rem; }
li { margin: .3rem 0; }
strong { font-weight: 600; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 3rem 0; }
blockquote { margin-left: 0; padding-left: 1rem; border-left: 2px solid var(--ink); color: var(--ink-soft); }
code { font-size: .9em; background: var(--tint); padding: .1em .3em; border-radius: 4px; }

.lede { font-size: 1.2rem; line-height: 1.55; }
.answer { font-size: 1.15rem; line-height: 1.6; border-left: 2px solid var(--ink); padding-left: 1rem; }
.disclosure { font-size: .92rem; color: var(--ink-soft); border: 1px solid var(--rule); border-radius: .6rem; padding: .7rem 1rem; }
.post-head .disclosure { text-align: left; max-width: var(--measure); margin: 1.25rem auto 0; }
.post-meta { font-size: .9rem; color: var(--ink-soft); }

/* Figures */
.prose img, .hero img { border-radius: .9rem; }
.hero { max-width: 60rem; margin: 0 auto 2.5rem; padding: 0 var(--gutter); }
.prose p > img { margin: 1.5rem 0; }

/* Tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 0 1.5rem; border: 1px solid var(--rule); border-radius: .6rem; }
.table-wrap table { margin: 0; }
table { border-collapse: collapse; width: 100%; font-size: .92rem; line-height: 1.45; }
th, td { text-align: left; vertical-align: top; padding: .6rem .75rem; border-bottom: 1px solid var(--rule); }
th { font-weight: 600; background: var(--tint); }
tbody tr:last-child td { border-bottom: 0; }
td:first-child, th:first-child { min-width: 7.5rem; }
.source { font-size: .85rem; color: var(--ink-soft); }

/* Blog index */
.cards { list-style: none; padding: 0; margin: 0 0 3rem; display: grid; gap: 2.5rem 2rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr)); }
.card { margin: 0; }
.card img { border-radius: .8rem; aspect-ratio: 16 / 9; object-fit: cover; width: 100%; margin-bottom: .9rem; }
.card h2 { font-size: 1.75rem; margin: .3rem 0 .5rem; }
.card h2 a { text-decoration: none; }
.card h2 a:hover { text-decoration: underline; }
.card p { font-size: .95rem; margin: 0 0 .5rem; }

/* Post footer */
.byline { max-width: var(--measure); margin: 3rem auto 0; padding: 1.5rem var(--gutter) 0; border-top: 1px solid var(--rule); font-size: .95rem; }
.pager { max-width: var(--measure); margin: 1.5rem auto 0; padding: 0 var(--gutter); display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; font-size: .95rem; }
.pager a { text-decoration: none; display: block; }
.pager span { display: block; font-size: .8rem; color: var(--ink-soft); }
.pager .next { text-align: right; }

/* Footer */
.site-footer { margin-top: 5rem; border-top: 1px solid var(--rule); background: var(--tint); font-size: .92rem; }
.site-footer .wrap { padding-top: 2rem; padding-bottom: 2.5rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; margin-bottom: 1rem; }
.site-footer p { margin: 0 0 .6rem; max-width: 46rem; }

@media (min-width: 48rem) {
  :root { --gutter: 2rem; }
  body { font-size: 1.125rem; }
  .page-head { padding-top: 4.5rem; }
  .post-head { padding-top: 4.5rem; }
}
@media (max-width: 30rem) {
  .pager { grid-template-columns: 1fr; }
  .pager .next { text-align: left; }
  .site-nav { order: 3; flex-basis: 100%; }
}
@media print {
  .site-header, .site-footer, .cta, .pager { display: none; }
}