/* voltbase docs stylesheet (S14) — single hand-written file, no build step
   (ADR-001 CSS default). Theme: pi.dev-inspired dark-first editorial-terminal
   look — serif body/display, monospace accents, steel-blue on near-black.
   Fonts are self-hosted OFL files under /voltbase/fonts/ (licences shipped
   beside them in site/src/fonts/). Light scheme is a CSS-only override of the
   same tokens via prefers-color-scheme (the artifact gate forbids <script>,
   so pi.dev's JS toggle is not portable — token values are AA-adjusted). */
:root {
  color-scheme: dark;
  --bg-deep: #0d1116;
  --bg-canvas: #161d27;
  --ink: #ebe7e4;
  --text: #d5d8db;
  --muted: #9fa4ab;
  --line: #49505980;
  --line-strong: #757d89;
  --panel: #ffffff08;
  --accent: #6a9fcc;
  --accent-ink: #0d1116;
  --rust: #b86b52;
  --warn: #e1b06e;
  --warn-bg: #e1b06e0d;
  --code-bg: #142433;
  --code-ink: #d5d8db;
  --max: 44rem;
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-mono: "Commit Mono", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;
  --font-accent: "Departure Mono", "Commit Mono", ui-monospace, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg-deep: #dacbc2;
    --bg-canvas: #ebe7e4;
    --ink: #252f3d;
    --text: #384251;
    --muted: #5c5752;
    --line: #8b847d59;
    --line-strong: #5c5752;
    --panel: #f4f2f0;
    --accent: #4b607c;
    --accent-ink: #f4f2f0;
    --rust: #844f3b;
    --warn: #6f4d13;
    --warn-bg: #eacd7c1f;
    --code-bg: #eef1f3;
    --code-ink: #252f3d;
  }
}

@font-face {
  font-family: "Commit Mono";
  src: url("/voltbase/fonts/CommitMono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Commit Mono";
  src: url("/voltbase/fonts/CommitMono-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Departure Mono";
  src: url("/voltbase/fonts/DepartureMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

* { box-sizing: border-box; }

html {
  font-size: 112.5%; /* 18px at the 16px UA default; scales with user preference */
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg-canvas);
  font: 1rem/1.6 var(--font-serif);
}

::selection {
  background: #4b607c40;
  color: var(--ink);
}

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

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 0.5rem;
  top: 0.5rem;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.5rem;
  font-family: var(--font-accent);
}

.site-head {
  border-bottom: 1px solid var(--line);
  background: var(--bg-deep);
}

.site-head .wrap,
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

.site-head .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 1.5rem;
}

.brand {
  font-family: var(--font-accent);
  font-weight: 400;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.04em;
}

.brand-glyph {
  color: var(--accent);
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.1rem;
}

nav a {
  font-family: var(--font-accent);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  padding-bottom: 0.2rem;
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a:focus-visible {
  color: var(--ink);
}

nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

main img {
  max-width: 100%;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  color: var(--ink);
  line-height: 1.25;
  font-weight: 700;
}

main > h1:first-child {
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  margin: 2.25rem 0 0.75rem;
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  margin: 2.25rem 0 0.75rem;
}

h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.5rem;
}

p, ul, ol {
  margin: 0.75rem 0;
}

.lede {
  font-size: 1.2rem;
  color: var(--muted);
  line-height: 1.6;
}

main > .lede {
  margin-bottom: 1.75rem;
}

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

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

.notice {
  border: 1px solid var(--rust);
  border-left-width: 3px;
  background: var(--warn-bg);
  color: var(--text);
  padding: 0.75rem 1rem;
  border-radius: 0.25rem;
}

.notice strong {
  color: var(--warn);
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  color: var(--code-ink);
  padding: 0.85rem 1rem;
  overflow-x: auto;
  border-radius: 0.25rem;
  font: 0.82rem/1.6 var(--font-mono);
}

code {
  font: 0.82em/1.5 var(--font-mono);
}

pre code {
  font-size: inherit;
}

p code, li code, td code {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.2rem;
  padding: 0.05em 0.3em;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
  font-size: 0.9rem;
}

th, td {
  border-bottom: 1px solid var(--line);
  padding: 0.55rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

th {
  font-family: var(--font-accent);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--panel);
  border-bottom: 1px solid var(--line-strong);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.cta {
  display: inline-block;
  font-family: var(--font-accent);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.65rem 1.2rem;
  border: 1px solid var(--accent);
  border-radius: 0.25rem;
  text-decoration: none;
}

.cta:hover,
.cta:focus-visible {
  color: var(--accent-ink);
  border-color: var(--line-strong);
}

.cta.secondary {
  background: transparent;
  color: var(--accent);
}

.cta.secondary:hover,
.cta.secondary:focus-visible {
  color: var(--ink);
}

.grid-3 {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  margin: 1rem 0;
}

.card {
  border: 1px solid var(--line);
  border-radius: 0.25rem;
  padding: 0.85rem 1.05rem;
  background: var(--panel);
}

.card h3 {
  margin-top: 0;
  font-size: 1rem;
}

.card p {
  margin: 0.5rem 0 0;
  font-size: 0.92rem;
}

footer.site-foot {
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
  margin-top: 3rem;
  font-size: 0.85rem;
  color: var(--muted);
}

footer.site-foot a {
  color: var(--muted);
}

footer.site-foot a:hover,
footer.site-foot a:focus-visible {
  color: var(--ink);
}