/* Adam Zachary Wasserman — paper reading surface.
   Deliberately not the hub theme. The hub is a dark identity page you scan;
   a paper is 7,000 words you read, so it gets a light ground, a measure that
   holds a line to roughly 65 characters, and room around every heading. */

:root {
  --paper: #ffffff;
  --ink: #16161a;
  --ink-soft: #4a4a55;
  --ink-faint: #74747f;
  --rule: #e2e2e8;
  --rule-strong: #b8b8c2;
  --red: #c1121f;
  --wash: #f7f7f9;
  --mono: 'JetBrains Mono', 'JetBrains Mono Fallback', ui-monospace, monospace;
  --serif: 'Literata', 'Literata Fallback', Georgia, serif;
  --measure: 40rem;
}

@font-face {
  font-family: 'JetBrains Mono Fallback';
  src: local('Courier New'), local('Courier');
  size-adjust: 95%;
}

@font-face {
  font-family: 'Literata Fallback';
  src: local('Georgia'), local('Times New Roman');
  size-adjust: 103%;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 3rem 1.5rem 6rem;
}

@media (min-width: 40rem) {
  body { font-size: 1.125rem; }
  main { padding: 5rem 2.5rem 8rem; }
}

/* Headings. Mono, tight to their own text, generous above.
   The asymmetry is the point: a heading belongs to what follows it. */
h1, h2, h3, h4 {
  font-family: var(--mono);
  font-weight: 600;
  line-height: 1.25;
  text-wrap: balance;
  color: var(--ink);
}

h1 {
  font-size: 1.75rem;
  margin: 0 0 0.75rem;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.1875rem;
  margin: 3.5rem 0 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}

h3 {
  font-size: 1rem;
  margin: 2.5rem 0 0.75rem;
}

h4 {
  font-size: 0.9375rem;
  margin: 2rem 0 0.5rem;
  color: var(--ink-soft);
}

p { margin: 0 0 1.25rem; }

/* The standfirst: subtitle, byline, download link. */
main > p:first-of-type {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
  margin-bottom: 2.5rem;
}

h1 + p em {
  font-style: normal;
  font-size: 1.25rem;
  color: var(--ink-soft);
  line-height: 1.4;
}

a { color: var(--red); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }

ul, ol { margin: 0 0 1.25rem; padding-left: 1.5rem; }
li { margin-bottom: 0.4rem; }

blockquote {
  margin: 1.5rem 0;
  padding-left: 1.25rem;
  border-left: 3px solid var(--rule-strong);
  color: var(--ink-soft);
}

code, pre { font-family: var(--mono); font-size: 0.875em; }
code { background: var(--wash); padding: 0.1em 0.3em; border-radius: 2px; }
pre { overflow-x: auto; background: var(--wash); padding: 1rem; border-radius: 3px; }
pre code { background: none; padding: 0; }

/* Tables carry the results, so they get the full width and their own scroll
   rather than being squeezed into the reading measure. */
table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  margin: 2rem 0;
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
}

th, td {
  padding: 0.5rem 0.9rem 0.5rem 0;
  text-align: left;
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}

thead th {
  border-bottom: 2px solid var(--rule-strong);
  font-weight: 600;
  color: var(--ink);
}

tbody tr:last-child td { border-bottom: 2px solid var(--rule-strong); }

figure { margin: 2.5rem 0; }

figure img, main img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

figcaption {
  margin-top: 0.9rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--ink-soft);
}

figcaption strong { color: var(--ink); font-weight: 600; }

hr { border: 0; border-top: 1px solid var(--rule); margin: 3rem 0; }

/* Pandoc footnotes and reference lists. */
.footnotes {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
  color: var(--ink-soft);
}

sup a { text-decoration: none; }

@media print {
  main { max-width: none; padding: 0; }
  a { color: var(--ink); }
  h2 { border-top: none; }
}