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

:root {
  --paper: #f2f4f4;
  --raised: #ffffff;
  --sunk: #e7ebeb;
  --ink: #101617;
  --body: #26302f;
  --muted: #5b686a;
  --rule: #d2d9d9;
  --rule-strong: #b4bfbf;
  --petrol: #0f5257;
  --petrol-soft: #e2eded;
  --sans: "Segoe UI Variable Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --mono: "Cascadia Mono", ui-monospace, "SF Mono", Consolas, monospace;
}

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

body {
  max-width: 1040px;
  margin: 0 auto;
  padding: 70px 56px 110px;
  overflow-wrap: break-word;
  background: var(--paper);
  color: var(--body);
  font: 17px/1.65 var(--serif);
  -webkit-font-smoothing: antialiased;
}

#title-block-header {
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 2px solid var(--ink);
  text-align: left;
}

.title {
  max-width: 14ch;
  margin: 0 0 22px;
  color: var(--ink);
  font: 700 clamp(2.7rem, 7vw, 4.8rem)/.98 var(--sans);
  letter-spacing: -.045em;
  text-wrap: balance;
}

.subtitle, .date {
  display: inline;
  margin: 0;
  color: var(--petrol);
  font: 700 11px/1.4 var(--sans);
  letter-spacing: .13em;
  text-transform: uppercase;
}

h2, h3, h4 { color: var(--ink); font-family: var(--sans); text-wrap: balance; }

h2 {
  margin: 68px 0 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule-strong);
  font-size: clamp(1.7rem, 4vw, 2.25rem);
  line-height: 1.08;
  letter-spacing: -.03em;
}

h3 { margin: 38px 0 13px; font-size: 1.12rem; line-height: 1.3; }
h4 { margin: 30px 0 10px; font-size: .95rem; line-height: 1.35; }
p { max-width: 72ch; margin: 0 0 1.05em; }
figure + p { color: var(--ink); font-size: 1.2rem; line-height: 1.55; }
a { color: var(--petrol); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid var(--petrol); outline-offset: 3px; border-radius: 2px; }
strong { color: var(--ink); }

ul, ol { max-width: 72ch; padding-left: 1.4em; }
li { margin: .35em 0; }

img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 28px 0 12px;
  border: 1px solid var(--rule);
  background: var(--raised);
}

figcaption { display: none; }

blockquote {
  max-width: 72ch;
  margin: 30px 0;
  padding: 18px 22px;
  border-left: 3px solid var(--petrol);
  background: var(--petrol-soft);
}

blockquote p:last-child { margin-bottom: 0; }

code {
  padding: .08em .3em;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--raised);
  color: var(--ink);
  font: .82em/1.5 var(--mono);
}

pre {
  max-width: 100%;
  margin: 24px 0;
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--rule);
  background: var(--ink);
  color: #eef4f3;
  font: .82rem/1.55 var(--mono);
}

pre code { padding: 0; border: 0; background: transparent; color: inherit; }

table {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 28px 0;
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-collapse: collapse;
  background: var(--raised);
  font: .88rem/1.45 var(--sans);
  font-variant-numeric: tabular-nums;
}

thead { background: var(--sunk); }
th, td { min-width: 160px; padding: 13px 15px; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; }
th { color: var(--muted); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
tr:last-child td { border-bottom: 0; }

details {
  max-width: 72ch;
  margin: 26px 0;
  padding: 17px 19px;
  border: 1px solid var(--rule);
  background: var(--raised);
}

summary { color: var(--petrol); cursor: pointer; font-family: var(--sans); }
details[open] summary { margin-bottom: 16px; }

@media (max-width: 640px) {
  body { padding: 46px 18px 78px; font-size: 16px; }
  #title-block-header { margin-bottom: 36px; padding-bottom: 30px; }
  h2 { margin-top: 54px; }
  pre { margin-right: -1px; margin-left: -1px; padding: 16px; font-size: .75rem; }
  th, td { min-width: 145px; padding: 12px; }
}

@media print {
  body { max-width: none; padding: 0; background: #fff; }
  a { color: inherit; }
}