/* Minimal. White page, black text, one thin column. */

:root {
  --measure: 31rem; /* width of the text column, padding included */
  --rule: #000;
  --soft: #f3f3f3;
  --muted: #444;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: #fff;
  color: #000;
  font-family: "Times New Roman", serif;
  line-height: 1.65;
}

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 4rem 1.25rem 6rem;
}

/* ---------- home link (fixed, top left of the viewport) ---------- */

nav.home {
  position: fixed;
  top: 1rem;
  left: 1.25rem;
  z-index: 1000;
  padding: 0.1rem 0.4rem;
  background: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
nav.home a {
  text-decoration: none;
}
nav.home a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

/* ---------- title block ---------- */

header {
  margin-bottom: 3rem;
}
header h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  line-height: 1.2;
}
.subtitle {
  margin: 0;
  font-style: italic;
}
.meta {
  margin: 0.75rem 0 0;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---------- headings ---------- */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
}
h2 {
  margin: 3rem 0 1rem;
  font-size: 1.35rem;
}
h3,
h4,
h5,
h6 {
  margin: 2.25rem 0 0.75rem;
  font-size: 1rem;
}

/* ---------- text ---------- */

p {
  margin: 0 0 1.25rem;
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}
a:hover {
  text-decoration-thickness: 2px;
}

sup {
  font-size: 0.7em;
  line-height: 0;
}

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

ul,
ol {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
}
li {
  margin: 0.25rem 0;
}
li > ul,
li > ol {
  margin: 0.25rem 0 0;
}

/* ---------- quotes ---------- */

blockquote {
  margin: 2rem 0;
  padding-left: 1.25rem;
  border-left: 1px solid var(--rule);
  font-style: italic;
}
blockquote p {
  margin: 0 0 0.75rem;
}
blockquote footer {
  font-size: 0.85rem;
  font-style: normal;
}

/* scripture: same idea, a heavier rule, upright type */
blockquote.scripture {
  border-left: 4px double var(--rule);
  font-style: normal;
}
blockquote.scripture sup {
  margin-right: 0.2em;
  font-weight: 700;
}
blockquote.scripture cite {
  font-style: normal;
  font-variant: small-caps;
  letter-spacing: 0.05em;
}

/* ---------- figures and canvases ---------- */

figure {
  margin: 2.5rem 0;
}
figure img {
  display: block;
  max-width: 100%;
  height: auto;
}
figcaption {
  margin-top: 0.6rem;
  font-size: 0.8rem;
  color: var(--muted);
}

canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--rule);
}

/* ---------- code and terminal ---------- */

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
code {
  padding: 0.1em 0.3em;
  background: var(--soft);
  font-size: 0.85em;
}

pre {
  margin: 1.75rem 0;
  padding: 1rem;
  overflow-x: auto;
  background: var(--soft);
  font-size: 0.8rem;
  line-height: 1.5;
  tab-size: 4;
}
pre code {
  padding: 0;
  background: none;
  font-size: inherit;
}

pre.terminal {
  background: #000;
  color: #fff;
}
.terminal .prompt {
  color: #999;
  user-select: none;
}
.terminal .cmd {
  font-weight: 700;
}

/* ---------- footnotes ---------- */

sup.fn a {
  padding: 0 0.1em;
  text-decoration: none;
}

.footnotes {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
}
.footnotes ol {
  margin: 0;
  padding-left: 1.25rem;
}
.footnotes li {
  margin-bottom: 0.5rem;
}
.footnotes .back {
  text-decoration: none;
}

/* ---------- table of contents (a <details> toggle) ---------- */

details.toc {
  margin: 0 0 3rem;
  font-size: 0.9rem;
}
details.toc summary {
  cursor: pointer;
  font-weight: 700;
}
details.toc nav {
  margin-top: 0.75rem;
}
details.toc ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}
details.toc ul ul {
  padding-left: 1.1rem;
}

/* ---------- small screens ---------- */

@media (max-width: 480px) {
  html {
    font-size: 17px;
  }
  main {
    padding-top: 3.5rem;
  }
  nav.home {
    top: 0.75rem;
  }
}