:root {
  color-scheme: light;
  --bg: #f5f2ea;
  --bg-elev: #fbf9f4;
  --ink: #11281e;
  --muted: #4a5a52;
  --line: #ded6c6;
  --accent: #0b6b4a;
  --accent-contrast: #ffffff;
  --link: #0a5c40;
  --link-hover: #063d2a;
  --clay: #7d5e22;
  --pill: #e3efe8;
  --pill-ink: #0a4a33;
  --code-bg: #0e1f18;
  --code-fg: #e3ede6;
  --inline-code-bg: #e6efe9;
  --inline-code-fg: #0b3a28;
  --callout: #f8f1e2;
  --shadow: 0 1px 0 rgba(17, 40, 30, 0.04);
  --sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f2a20;
  --bg-elev: #153527;
  --ink: #eceee4;
  --muted: #aebdb4;
  --line: #23452f;
  --accent: #2fa878;
  --accent-contrast: #06120d;
  --link: #7fd3ae;
  --link-hover: #b5ebd2;
  --clay: #d6b56d;
  --pill: #1a3d2c;
  --pill-ink: #cbebd9;
  --code-bg: #08160f;
  --code-fg: #e3ede6;
  --inline-code-bg: #1a3d2c;
  --inline-code-fg: #cbebd9;
  --callout: #1f1b10;
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.02rem;
  line-height: 1.6;
}

:root[data-theme="dark"] body {
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(47, 168, 120, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 168, 120, 0.16) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: -1px -1px;
}

::selection {
  background: #d7ecdf;
  color: #10241a;
}

:root[data-theme="dark"] ::selection {
  background: #2f5344;
  color: #f4faf6;
}

img {
  max-width: 100%;
}

a {
  color: var(--link);
  text-underline-offset: 0.16em;
}

a:hover {
  color: var(--link-hover);
}

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

button,
input {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4 {
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.25;
}

.wrap {
  width: min(1120px, calc(100% - 2.4rem));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 50;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 0.4rem 0.7rem;
  border-radius: 6px;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.6rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.15rem;
  padding: 0.75rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: -0.03em;
}

.brand:hover {
  color: var(--ink);
}

.mark {
  width: 1.7rem;
  height: 1.7rem;
  color: var(--clay);
  flex: none;
}

.site-nav {
  display: flex;
  gap: 0.9rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.92rem;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.site-nav a[aria-current="page"] {
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--clay);
}

.search-form {
  position: relative;
  flex: 1 1 16rem;
  min-width: 12rem;
}

.search-form input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.48rem 0.8rem;
}

.search-results {
  position: absolute;
  top: calc(100% + 0.4rem);
  right: 0;
  z-index: 30;
  width: min(34rem, calc(100vw - 1.5rem));
  max-height: 24rem;
  overflow: auto;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 16px 40px rgba(18, 22, 20, 0.16);
}

.search-hit {
  display: block;
  padding: 0.7rem 0.9rem;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--line);
}

.search-hit:last-child {
  border-bottom: 0;
}

.search-hit:hover,
.search-hit.is-active {
  background: var(--pill);
  color: inherit;
}

.search-kind {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clay);
  font-weight: 600;
}

.search-hit strong {
  display: block;
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 600;
}

.search-snippet {
  display: block;
  margin-top: 0.12rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.search-empty {
  margin: 0;
  padding: 0.8rem 0.9rem;
  color: var(--muted);
}

mark {
  background: #efe0b5;
  color: inherit;
  border-radius: 2px;
  padding: 0 0.12em;
}

:root[data-theme="dark"] mark {
  background: #5c4a2a;
  color: #fff8ea;
}

.theme-toggle {
  width: 2.3rem;
  height: 2.3rem;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
  cursor: pointer;
}

.theme-toggle svg {
  width: 1.15rem;
  height: 1.15rem;
}

.icon-sun { display: none; }

:root[data-theme="dark"] .icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }

main {
  padding-bottom: 4rem;
}

.hero {
  padding: 2.3rem 0 0.4rem;
  max-width: 40rem;
}

.kicker {
  margin: 0 0 0.35rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clay);
}

h1 {
  margin: 0 0 0.55rem;
  font-size: clamp(2rem, 4vw, 2.7rem);
}

.lede {
  margin: 0;
  font-size: 1.12rem;
  color: var(--muted);
}

.meta {
  margin: 0.7rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.tag-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.5rem 0 1.15rem;
}

.tag-btn {
  border: 1px solid var(--line);
  background: var(--bg-elev);
  border-radius: 999px;
  padding: 0.22rem 0.7rem;
  cursor: pointer;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.82rem;
}

.tag-btn:hover {
  border-color: var(--clay);
}

.tag-btn.is-active {
  background: var(--clay);
  border-color: var(--clay);
  color: var(--accent-contrast);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16.5rem, 1fr));
  gap: 0.85rem;
}

a.card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-height: 100%;
  padding: 0.95rem 1rem 0.9rem;
  text-decoration: none;
  color: inherit;
  background: var(--bg-elev);
  border: 1px solid #5f917a;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

:root[data-theme="dark"] a.card {
  border-color: rgba(47, 168, 120, 0.72);
  box-shadow: 0 0 0 1px rgba(47, 168, 120, 0.1), 0 0 20px rgba(47, 168, 120, 0.1);
}

a.card:hover {
  border-color: var(--accent);
  color: inherit;
  transform: translateY(-1px);
}

a.card h3 {
  margin: 0;
  font-size: 1.28rem;
}

a.card p {
  margin: 0;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card.is-hidden {
  display: none;
}

.card-tags,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  list-style: none;
  margin: 0.2rem 0 0;
  padding: 0;
}

.card-tags li,
.tag-list a {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--clay);
  background: var(--pill);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.12rem 0.5rem;
  text-decoration: none;
}

.tag-list {
  margin-top: 0.85rem;
}

.tag-list a:hover {
  color: var(--link);
}

.empty-state {
  margin: 1rem 0 0;
  color: var(--muted);
}

.notes-block {
  margin-top: 2.6rem;
}

.notes-block h2 {
  margin: 0 0 0.8rem;
  font-size: 1.45rem;
}

.doc-header {
  padding: 1.8rem 0 0.4rem;
  max-width: 44rem;
}

.crumbs {
  margin: 0 0 0.7rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.crumbs a {
  text-decoration: none;
}

.doc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 13.5rem;
  gap: 2rem;
  align-items: start;
  margin-top: 1.2rem;
}

.prose {
  min-width: 0;
  max-width: 48rem;
}

.prose > :first-child {
  margin-top: 0;
}

.prose h2 {
  margin: 2rem 0 0.55rem;
  font-size: 1.5rem;
  padding-top: 0.35rem;
}

.prose h3 {
  margin: 1.4rem 0 0.4rem;
  font-size: 1.2rem;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0.6rem 0;
}

.prose li + li {
  margin-top: 0.25rem;
}

.prose blockquote {
  margin: 1rem 0;
  padding: 0.7rem 0.95rem;
  border-left: 3px solid var(--clay);
  background: var(--callout);
  color: var(--ink);
}

.prose blockquote p:first-child {
  margin-top: 0;
}

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

.prose :not(pre) > code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--inline-code-bg);
  color: var(--inline-code-fg);
  padding: 0.08em 0.35em;
  border-radius: 4px;
}

div.highlighter-rouge,
.code-wrap {
  position: relative;
  margin: 0.9rem 0 1.1rem;
  background: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid rgba(47, 168, 120, 0.72);
  border-radius: 10px;
  box-shadow: 0 0 0 1px rgba(47, 168, 120, 0.12), 0 0 22px rgba(47, 168, 120, 0.14);
}

.highlighter-rouge .highlight,
.highlight {
  background: transparent;
  margin: 0;
}

.highlighter-rouge pre,
.code-wrap pre,
.prose pre {
  margin: 0;
  padding: 0.95rem 4.6rem 0.95rem 1rem;
  overflow: auto;
  background: transparent;
  color: var(--code-fg);
  font-family: var(--mono);
  font-size: 0.9rem;
  line-height: 1.55;
  tab-size: 2;
}

.prose pre code {
  font-family: inherit;
  font-size: inherit;
  background: transparent;
  color: inherit;
  padding: 0;
}

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  border: 1px solid rgba(47, 168, 120, 0.45);
  background: rgba(255, 255, 255, 0.08);
  color: var(--code-fg);
  border-radius: 6px;
  padding: 0.18rem 0.5rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
}

/* Prompt glyph only. It is not in the DOM, so Copy leaves it behind. */
div.language-bash.highlighter-rouge pre,
div.language-sh.highlighter-rouge pre,
div.language-shell.highlighter-rouge pre,
div.language-console.highlighter-rouge pre,
div.language-zsh.highlighter-rouge pre {
  padding-left: 2.15rem;
}

div.language-bash.highlighter-rouge::before,
div.language-sh.highlighter-rouge::before,
div.language-shell.highlighter-rouge::before,
div.language-console.highlighter-rouge::before,
div.language-zsh.highlighter-rouge::before {
  content: "$";
  position: absolute;
  z-index: 1;
  top: 0.95rem;
  left: 0.85rem;
  color: #d6b56d;
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.55;
  pointer-events: none;
}

.copy-btn:hover,
.copy-btn.is-copied {
  background: rgba(255, 255, 255, 0.16);
}

/* Keywords #E2C27D, strings #A8E0C0, comments #8FB0A2, numbers #F0D38E.
   Shell flags are Rouge .nt; they use the keyword gold so command lines read. */
.highlight .c,
.highlight .c1,
.highlight .cm,
.highlight .cs {
  color: #8fb0a2;
  font-style: italic;
}

.highlight .k,
.highlight .kc,
.highlight .kd,
.highlight .kn,
.highlight .kp,
.highlight .kr,
.highlight .kt,
.highlight .ow,
.highlight .nt {
  color: #e2c27d;
}

.highlight .s,
.highlight .s1,
.highlight .s2,
.highlight .sb,
.highlight .sd,
.highlight .se,
.highlight .sh,
.highlight .si,
.highlight .sx {
  color: #a8e0c0;
}

.highlight .m,
.highlight .mf,
.highlight .mh,
.highlight .mi,
.highlight .mo,
.highlight .il {
  color: #f0d38e;
}

.highlight .nv,
.highlight .vg,
.highlight .vi,
.highlight .na {
  color: #f0d38e;
}

.highlight .nb,
.highlight .nc,
.highlight .nf,
.highlight .nn {
  color: var(--code-fg);
}

.toc {
  position: sticky;
  top: 5.2rem;
  font-size: 0.9rem;
}

.toc-label {
  margin: 0 0 0.4rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc li {
  margin: 0.28rem 0;
}

.toc a {
  color: var(--muted);
  text-decoration: none;
}

.toc a:hover {
  color: var(--link);
}

.toc .toc-sub {
  margin-left: 0.75rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0 1.6rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 860px) {
  .doc-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
    order: -1;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(1120px, calc(100% - 1.6rem));
  }

  .header-inner {
    gap: 0.65rem;
  }

  .search-form {
    flex-basis: 100%;
    order: 5;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  a.card:hover { transform: none; }
}

@media print {
  .site-header,
  .site-footer,
  .toc,
  .copy-btn,
  .tag-bar {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .highlighter-rouge,
  .code-wrap {
    border: 1px solid #ccc;
  }

  pre {
    white-space: pre-wrap;
  }
}