/* Open letter: clean, minimalist, serif. No web fonts, no JavaScript. */

:root {
  --paper: #fdfcf9;
  --ink: #1f1d1a;
  --muted: #6b665e;
  --rule: #d9d4ca;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171614;
    --ink: #e6e2da;
    --muted: #9a948a;
    --rule: #3a3732;
  }
}

html {
  font-size: 19px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0 auto;
  padding: 4rem 1.25rem 6rem;
  max-width: 34rem;
  background: var(--paper);
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua",
    Georgia, serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
  hyphens: auto;
}

/* Title block (generated from the title, author and date in index.md) */

header {
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}

h1.title {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  font-weight: normal;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

p.author,
p.date {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-style: italic;
}

/* Body text */

p {
  margin: 0 0 1.2rem;
}

h2 {
  margin: 2.5rem 0 1rem;
  font-size: 1.15rem;
  font-weight: normal;
  font-variant-caps: small-caps;
  letter-spacing: 0.04em;
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--muted);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-color: var(--ink);
}

blockquote {
  margin: 1.5rem 0;
  padding-left: 1.25rem;
  border-left: 2px solid var(--rule);
  color: var(--muted);
  font-style: italic;
}

hr {
  margin: 2.5rem auto;
  width: 4rem;
  border: 0;
  border-top: 1px solid var(--rule);
}

.signature {
  margin-top: 3rem;
}

/* Small screens and print */

@media (max-width: 30rem) {
  html {
    font-size: 17px;
  }
  body {
    padding-top: 2.5rem;
  }
}

@media print {
  html {
    font-size: 11pt;
  }
  body {
    padding: 0;
    max-width: none;
    background: #fff;
    color: #000;
  }
}