/* site.css — shared light-theme stylesheet for ArchGraph detail pages */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --border: #e6e8ee;
  --text: #0f172a;
  --muted: #5b6472;
  --accent: #4d6bfe;
  --accent-soft: #eef1ff;
  --code-bg: #f2f4f8;
  --ok: #0f9d58;
  --warn: #b26a00;
  --maxw: 1040px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial,
    "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- sticky site nav ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-nav .brand { font-weight: 600; font-size: 0.95rem; color: var(--text); }
.site-nav .brand:hover { text-decoration: none; }
.site-nav .brand code {
  color: var(--accent);
  background: transparent;
  padding: 0;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
}
.site-nav .links { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.site-nav .links a { color: var(--muted); font-size: 0.9rem; }
.site-nav .links a:hover { color: var(--text); text-decoration: none; }
.site-nav .links a[aria-current="page"] { color: var(--text); font-weight: 600; }
.site-nav .gh-btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text) !important;
  background: var(--bg-soft);
}
.site-nav .gh-btn:hover { background: #eef0f5; text-decoration: none; }

/* ---------- layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 44px 24px 96px; }
.eyebrow {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 10px;
}
h1 { font-size: 2.1rem; letter-spacing: -0.02em; margin: 0 0 16px; line-height: 1.25; }
h2 { font-size: 1.45rem; margin: 0 0 14px; letter-spacing: -0.02em; }
h3 { font-size: 1.08rem; margin: 22px 0 8px; }
section { padding: 34px 0; border-top: 1px solid var(--border); scroll-margin-top: 72px; }
section:first-of-type { border-top: 0; padding-top: 8px; }
.lead { color: var(--muted); max-width: 780px; margin: 0 0 20px; }
.lead strong { color: var(--text); }

ul.clean { color: var(--muted); padding-left: 20px; margin: 0 0 10px; }
ul.clean li { margin: 6px 0; }
ul.clean strong { color: var(--text); }

/* ---------- code ---------- */
code {
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 5px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.9em;
}
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.86rem;
  line-height: 1.65;
  color: #1f2937;
  margin: 12px 0 8px;
}
pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }

/* ---------- tables ---------- */
table { width: 100%; border-collapse: collapse; margin: 8px 0 18px; font-size: 0.92rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--text); font-weight: 600; background: var(--bg-soft); }
td { color: var(--muted); }

/* comparison table: emphasize the ArchGraph column */
table.compare td:last-child { color: var(--text); }
table.compare td:last-child strong { color: var(--accent); }
table.compare tbody tr:hover { background: var(--bg-soft); }

/* ---------- grid / cards ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.card { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px; padding: 20px 22px; }
.card h3 { margin: 0 0 8px; }
.card p { margin: 0; color: var(--muted); font-size: 0.94rem; }
.card p + p { margin-top: 8px; }

/* ---------- notes / checks ---------- */
.note {
  border: 1px solid var(--border);
  border-left: 3px solid var(--warn);
  background: #fffdf7;
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--muted);
  font-size: 0.92rem;
  margin: 14px 0;
}
.note strong { color: var(--text); }
.check {
  border: 1px solid var(--border);
  border-left: 3px solid var(--ok);
  background: #e9f7ef;
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--muted);
  font-size: 0.92rem;
  margin: 14px 0;
}
.check strong { color: var(--text); }
.check code { background: rgba(255, 255, 255, 0.7); }

/* ---------- steps ---------- */
.step {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 4px 20px 16px;
  margin: 0 0 16px;
  background: #fff;
}
.step-badge {
  display: inline-block;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 3px 12px;
  margin: 16px 0 4px;
  letter-spacing: 0.04em;
}
.step h3 { margin: 4px 0 6px; }

/* ---------- diagrams ---------- */
figure.diagram {
  margin: 20px 0 8px;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-soft);
}
figure.diagram img { display: block; width: 100%; height: auto; background: #fff; }
figure.diagram figcaption {
  padding: 12px 16px;
  color: var(--muted);
  font-size: 0.86rem;
  border-top: 1px solid var(--border);
}
figure.diagram figcaption strong { color: var(--text); }

/* ---------- toc ---------- */
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 4px; }
.toc a {
  font-size: 0.85rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  background: var(--bg-soft);
}
.toc a:hover { color: var(--accent); text-decoration: none; }

/* ---------- footer ---------- */
footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 28px 24px;
  border-top: 1px solid var(--border);
}
footer a { color: var(--accent); }
footer code { background: transparent; padding: 0; }

@media (max-width: 640px) {
  h1 { font-size: 1.7rem; }
  .site-nav { padding: 12px 16px; }
  .site-nav .links { gap: 12px; }
  main { padding: 32px 16px 72px; }
}