/* pr-shepherd site — terminal-forward, dark by default.
   Chrome (nav, headings, code, badges) is monospace; body prose is a system sans stack
   for long-form readability. Toggle to light via the header button (data-theme, no-FOUC
   script sets it before paint from localStorage). */

:root {
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --bg: #0a0d0c;
  --bg-elevated: #101513;
  --bg-terminal: #060908;
  --fg: #e7efe9;
  --fg-muted: #93a39a;
  --border: #1d2926;
  --accent: #34d67f;
  --accent-strong: #7cf0ac;
  --accent-fg: #06120c;
  --code-fg: #cdeede;
  --link: var(--accent-strong);
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  --radius: 8px;
  --max-width: 780px;
}

:root[data-theme="light"] {
  --bg: #f7faf8;
  --bg-elevated: #ffffff;
  --bg-terminal: #101816;
  --fg: #10221a;
  --fg-muted: #4d5c55;
  --border: #dbe5df;
  --accent: #0e8a4f;
  --accent-strong: #0a6b3d;
  --accent-fg: #f2fbf6;
  --code-fg: #e7efe9;
  --link: #0a6b3d;
  --shadow: 0 12px 32px rgba(16, 34, 26, 0.08);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus {
  left: 0;
}

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

img {
  max-width: 100%;
}

/* ---------- header ---------- */

.site-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
  white-space: nowrap;
}
.brand-mark {
  display: block;
  width: 28px;
  height: 28px;
}
.brand-mark svg {
  display: block;
  width: 100%;
  height: 100%;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.9rem;
}
.site-nav a {
  text-decoration: none;
  color: var(--fg-muted);
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover {
  color: var(--fg);
}
.site-nav a[aria-current="page"] {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

.theme-toggle {
  margin-left: auto;
  background: none;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  border-radius: 999px;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
}
.theme-toggle:hover {
  color: var(--fg);
  border-color: var(--accent);
}

/* ---------- layout ---------- */

main {
  display: flex;
  justify-content: center;
  padding: 0 1.5rem;
}

.page {
  width: 100%;
  max-width: var(--max-width);
  padding: 2.5rem 0 4rem;
}

.page h1 {
  font-family: var(--mono);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.25;
  margin: 0 0 1rem;
}
.page h2 {
  font-family: var(--mono);
  font-size: 1.3rem;
  margin: 2.5rem 0 1rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--border);
}
.page h2:first-of-type {
  border-top: none;
  padding-top: 0;
}
.page h3 {
  font-family: var(--mono);
  font-size: 1.05rem;
  margin: 1.75rem 0 0.75rem;
}
.page h1 .anchor,
.page h2 .anchor,
.page h3 .anchor {
  margin-left: 0.5rem;
  color: var(--fg-muted);
  text-decoration: none;
  opacity: 0;
  font-weight: 400;
}
.page h1:hover .anchor,
.page h2:hover .anchor,
.page h3:hover .anchor {
  opacity: 1;
}

.page p,
.page li {
  color: var(--fg);
}
.page > p:first-of-type {
  font-size: 1.1rem;
  color: var(--fg-muted);
}

blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 1.25rem;
  border-left: 3px solid var(--accent);
  color: var(--fg-muted);
  font-style: italic;
}
blockquote p {
  margin: 0.5rem 0;
}

code {
  font-family: var(--mono);
  background: var(--code-fg, transparent);
  background: color-mix(in srgb, var(--fg) 10%, transparent);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.9em;
}

pre {
  background: var(--bg-terminal);
  color: #d7e9de;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.55;
}
pre code {
  background: none;
  padding: 0;
  color: inherit;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.92rem;
  overflow-x: auto;
  display: block;
}
th,
td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
  vertical-align: top;
}
th {
  font-family: var(--mono);
  background: var(--bg-elevated);
  color: var(--fg-muted);
  font-weight: 600;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

.canonical-spec {
  margin-top: 3rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.canonical-spec h2 {
  margin: 0 0 0.75rem;
  border: none;
  padding: 0;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
}
.canonical-spec ul {
  margin: 0;
  padding-left: 1.25rem;
}
.canonical-spec li {
  margin: 0.35rem 0;
}

/* ---------- reusable content components (splash + section indexes) ---------- */

.hero {
  padding: 3rem 0 1rem;
}
.hero .kicker {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.hero h1 {
  margin-top: 0.75rem;
}
.hero .tagline {
  font-size: 1.2rem;
  color: var(--fg-muted);
  max-width: 46ch;
}

.terminal {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin: 1.75rem 0;
}
.terminal .terminal-bar {
  display: flex;
  gap: 0.4rem;
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid var(--border);
}
.terminal .terminal-bar span {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--border);
}
.terminal pre {
  border: none;
  border-radius: 0;
  margin: 0;
  background: transparent;
}

.action-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}
.action-badges li {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--fg-muted);
}

.card-grid ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
  list-style: none;
  padding: 0;
}
.card-grid li {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  color: var(--fg-muted);
  font-size: 0.92rem;
}
.card-grid li:has(a:hover) {
  border-color: var(--accent);
}
.card-grid li a {
  display: block;
  font-family: var(--mono);
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
  margin-bottom: 0.4rem;
}
.card-grid li a:hover {
  color: var(--accent-strong);
}

.install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
  align-items: start;
}
.install-method p:first-child {
  font-family: var(--mono);
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--fg);
}
.install-method pre {
  margin: 0;
  font-size: 0.78rem;
}
.install-method pre + p {
  margin: 0.6rem 0 0;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--fg-muted);
}
.site-footer a {
  color: var(--fg-muted);
}
.site-footer a:hover {
  color: var(--fg);
}

@media (max-width: 600px) {
  .site-header {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .site-nav {
    order: 3;
    width: 100%;
    gap: 1rem;
  }
}