/* xenv.sh — hacker monospace.
 *
 * Default palette is dark (the project's identity). When the user's
 * OS reports `prefers-color-scheme: light`, a paper-cream light
 * palette takes over. No JS, no toggle, no FOUC — pure CSS media
 * query. Trust the OS; it knows day from night.
 */

:root {
  --bg: #0d0d0d;
  --bg-soft: #161616;
  --fg: #e8e6e0;
  --fg-dim: #8a8780;
  --accent: #d4af37;
  --accent-dim: #8a7028;
  --rule: #2a2a2a;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fbf9f3;          /* warm cream — paper feel */
    --bg-soft: #f0ece2;     /* slightly darker cream for code blocks */
    --fg: #1a1a1a;          /* near-black, ~15:1 on bg (WCAG AAA) */
    --fg-dim: #6b685f;      /* warm gray for footer / secondary text */
    --accent: #8a6f1f;      /* dark ochre — readable amber lineage */
    --accent-dim: #b89530;  /* lighter amber for underlines / dim accents */
    --rule: #d8d4c8;        /* warm rule lines */
  }
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
  max-width: 56rem;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-monospace, "JetBrains Mono", "Berkeley Mono",
               "SF Mono", Menlo, Consolas, monospace;
  font-size: 15px;
  line-height: 1.55;
  font-feature-settings: "calt" 1, "liga" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* headings */
h1, h2, h3, h4 {
  color: var(--fg);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 2.5rem 0 1rem;
}
h1 {
  font-size: 2.2rem;
  margin-top: 0;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.75rem;
}
h2 {
  font-size: 1.3rem;
  color: var(--accent);
  margin-top: 3rem;
}
h2::before { content: "## "; color: var(--accent-dim); }
h3 { font-size: 1.05rem; color: var(--accent); }
h3::before { content: "### "; color: var(--accent-dim); }

/* prose */
p { margin: 0.9rem 0; }

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-dim);
}
a:hover { border-bottom-color: var(--accent); }

strong { color: var(--fg); font-weight: 700; }
em     { color: var(--fg); font-style: italic; }

/* lists */
ul, ol { padding-left: 1.5rem; margin: 0.9rem 0; }
li { margin: 0.25rem 0; }
ul li::marker { color: var(--accent-dim); }

/* code */
code {
  font-family: inherit;
  background: var(--bg-soft);
  color: var(--fg);
  padding: 0.1em 0.35em;
  border-radius: 2px;
  font-size: 0.95em;
}

pre {
  background: var(--bg-soft);
  border-left: 2px solid var(--accent-dim);
  padding: 1rem 1.25rem;
  margin: 1.2rem 0;
  overflow-x: auto;
  line-height: 1.5;
  font-size: 0.92em;
}
pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  font-size: 1em;
}

/* keep the file-tree drawings readable */
pre, pre code { white-space: pre; }

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

/* tables (rare in this doc but support them) */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95em;
}
th, td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--rule);
}
th { color: var(--accent); }

/* blockquotes — used as man-page-style hanging-indent for term/def pairs
   (COMMANDS, ENVIRONMENT, FILES sections). Not for quoted prose, so we
   don't dim them; they ARE the content. */
blockquote {
  margin: 0.25rem 0 0.9rem 0;
  padding: 0 0 0 1.5rem;
  border-left: none;
  color: var(--fg);
}
blockquote p {
  margin: 0;
}

/* footer */
footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  color: var(--fg-dim);
  font-size: 0.85em;
}
footer a { color: var(--fg-dim); border-bottom-color: var(--rule); }
footer a:hover { color: var(--accent); border-bottom-color: var(--accent-dim); }

/* selection */
::selection { background: var(--accent-dim); color: var(--bg); }

/* small screens */
@media (max-width: 640px) {
  body { padding: 2rem 1rem 4rem; font-size: 14px; }
  h1   { font-size: 1.7rem; }
}