:root {
  color-scheme: light dark;
  --bg: #fbfbf8;
  --fg: #1b1b1b;
  --muted: #595959;
  --accent: #0b5cad;
  --code-bg: #f0efe9;
  --line: #d6d4cc;
  --hl-str: #2d6a1f;
  --hl-flag: #8a3a9e;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171a;
    --fg: #e8e6e3;
    --muted: #a3a19c;
    --accent: #7fb2f0;
    --code-bg: #1f2125;
    --line: #36383d;
    --hl-str: #93c98a;
    --hl-flag: #d6a2e8;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 1rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 1rem/1.6 var(--sans);
}

a {
  color: var(--accent);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Narrow screens: one column in source order (hero, TOC, content, footer). */
.page {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  max-width: 84rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.page > * {
  min-width: 0;
}

.hero h1 {
  margin: 0;
  font: 700 2.5rem/1.2 var(--mono);
}

.tagline {
  margin: 0.25rem 0 0.75rem;
  font-size: 1.25rem;
}

.meta {
  display: flex;
  gap: 1rem;
  margin: 0;
  font-family: var(--mono);
  color: var(--muted);
}

/* The TOC keeps gh-md-toc's literal output: one line per link, spaces preserved. */
.toc {
  overflow-x: auto;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--code-bg);
  font: 0.8125rem/1.8 var(--mono);
}

.toc a {
  display: block;
  white-space: pre;
  text-decoration: none;
}

.toc a:hover {
  text-decoration: underline;
}

.toc a span {
  color: var(--muted);
}

main h2 {
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--line);
  font-size: 1.5rem;
}

main h2:first-child {
  margin-top: 0;
}

main h3 {
  margin: 1.75rem 0 0.75rem;
  font-size: 1.2rem;
}

code {
  font-family: var(--mono);
  font-size: 0.875em;
}

pre {
  overflow-x: auto;
  margin: 0 0 1rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--code-bg);
  line-height: 1.5;
}

pre code {
  font-size: 0.875rem;
}

/* Syntax highlighting (added by the inline script). */
.tok-prompt,
.tok-syntax,
.tok-comment {
  color: var(--muted);
}

.tok-cmd {
  color: var(--accent);
  font-weight: 600;
}

.tok-key,
.tok-title {
  color: var(--accent);
}

.tok-flag {
  color: var(--hl-flag);
}

.tok-str {
  color: var(--hl-str);
}

.copyable {
  position: relative;
}

/* Room above the first line, so the button never covers a long command. */
.copyable pre {
  padding-top: 2.5rem;
}

.copy {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
  font: 0.75rem var(--sans);
  cursor: pointer;
}

footer {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
}

/* Wide screens: the TOC becomes a sticky sidebar left of the content. */
@media (min-width: 80rem) {
  .page {
    grid-template-columns: max-content minmax(0, 46rem);
    justify-content: center;
    column-gap: 3rem;
  }

  .toc {
    grid-column: 1;
    grid-row: 1 / span 3;
    align-self: start;
    position: sticky;
    top: 1.5rem;
    max-height: calc(100vh - 3rem);
    overflow: auto;
  }

  .hero {
    grid-column: 2;
    grid-row: 1;
  }

  main {
    grid-column: 2;
    grid-row: 2;
  }

  footer {
    grid-column: 2;
    grid-row: 3;
  }
}