:root {
  --bg: #0b0d12;
  --bg-elev: #11141b;
  --bg-card: #141822;
  --line: #1f2533;
  --line-strong: #2a3142;
  --fg: #e7ecf3;
  --fg-dim: #a4adbf;
  --fg-mute: #6b7388;
  --accent: #b58cff;
  --accent-2: #6fd1ff;
  --accent-3: #ffb98a;
  --good: #7ee787;
  --code-bg: #0d1019;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
code, pre, .mono {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-feature-settings: "liga" 0, "calt" 0;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
header.site {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(11,13,18,0.7);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
}
.brand .logo { width: 28px; height: 28px; }
.brand-name { letter-spacing: -0.01em; font-size: 18px; }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a { color: var(--fg-dim); font-size: 14px; text-decoration: none; }
.nav-links a:hover { color: var(--fg); }
.nav-links a.current { color: var(--fg); }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 999px;
  font-size: 14px; font-weight: 500;
  border: 1px solid var(--line-strong);
  color: var(--fg);
  background: var(--bg-elev);
  text-decoration: none;
  transition: transform .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); border-color: var(--accent); }

/* ---------- Footer ---------- */
footer.site {
  border-top: 1px solid var(--line);
  padding: 32px 0;
  color: var(--fg-mute);
  font-size: 13px;
  margin-top: 64px;
}
footer.site .row {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
}
footer.site .links { display: flex; gap: 18px; }
footer.site .links a { color: var(--fg-dim); text-decoration: none; }

/* ---------- Prose ---------- */
.prose {
  max-width: 780px;
  padding-top: 56px;
  padding-bottom: 64px;
}
.prose .back {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--fg-mute);
  font-size: 13px;
  text-decoration: none;
  margin-bottom: 28px;
}
.prose .back:hover { color: var(--accent-2); }

.prose h1, .prose h2, .prose h3, .prose h4, .prose h5, .prose h6 {
  letter-spacing: -0.015em;
  line-height: 1.2;
  scroll-margin-top: 80px;
  font-weight: 700;
}
.prose h1 {
  font-size: clamp(32px, 4vw, 44px);
  margin: 0 0 24px;
  background: linear-gradient(120deg, #e7ecf3 0%, #b58cff 60%, #6fd1ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.prose h2 {
  font-size: 26px;
  margin: 56px 0 16px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.prose h3 { font-size: 19px; margin: 36px 0 12px; }
.prose h4 { font-size: 16px; margin: 28px 0 10px; color: var(--accent-2); }
.prose h5, .prose h6 { font-size: 14px; margin: 24px 0 8px; color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.06em; }

.prose p { margin: 0 0 16px; color: var(--fg); }
.prose a { color: var(--accent-2); text-underline-offset: 3px; text-decoration-color: rgba(111,209,255,0.4); }
.prose a:hover { text-decoration-color: var(--accent-2); }

.prose strong { color: var(--fg); font-weight: 600; }
.prose em { color: var(--fg-dim); }

.prose ul, .prose ol { margin: 0 0 16px; padding-left: 24px; }
.prose li { margin: 6px 0; }
.prose li > ul, .prose li > ol { margin: 6px 0; }
.prose li::marker { color: var(--fg-mute); }

.prose blockquote {
  margin: 18px 0;
  padding: 12px 18px;
  border-left: 3px solid var(--accent);
  background: rgba(181,140,255,0.06);
  color: var(--fg-dim);
  border-radius: 0 8px 8px 0;
}
.prose blockquote p:last-child { margin-bottom: 0; }

.prose code {
  font-size: 0.88em;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line);
  color: var(--accent-2);
}
.prose pre {
  margin: 18px 0 22px;
  padding: 18px;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
  box-shadow: 0 20px 40px -30px rgba(0,0,0,0.6);
}
.prose pre code {
  background: transparent;
  border: none;
  padding: 0;
  border-radius: 0;
  color: #d9e1ec;
  font-size: inherit;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0 22px;
  font-size: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.prose th, .prose td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.prose th {
  color: var(--fg-dim);
  font-weight: 600;
  background: var(--bg-elev);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.prose tr:last-child td { border-bottom: none; }
.prose tr:hover td { background: rgba(255,255,255,0.02); }

.prose hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }
.prose img { max-width: 100%; height: auto; border-radius: 8px; }

/* highlight.js github-dark integration */
.prose pre code.hljs { padding: 0; background: transparent; }

/* ---------- Mobile (≤720px) ---------- */
@media (max-width: 720px) {
  .container { padding: 0 16px; }

  /* Header: stack brand row over wrapping nav-links so 7 doc links +
     GitHub button stay reachable on a phone instead of overflowing. */
  .nav {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 10px 0;
  }
  .nav-links {
    flex-wrap: wrap;
    gap: 8px 14px;
    row-gap: 8px;
  }
  .nav-links a { font-size: 13px; }
  .nav-links a.current { color: var(--fg); font-weight: 600; }
  .nav-links .btn { padding: 6px 11px; font-size: 12.5px; }

  /* Prose tightened for phones */
  .prose { padding-top: 36px; padding-bottom: 48px; }
  .prose h1 { font-size: clamp(26px, 7vw, 36px); margin: 0 0 18px; }
  .prose h2 { font-size: 22px; margin: 40px 0 14px; padding-top: 22px; }
  .prose h3 { font-size: 17px; margin: 28px 0 10px; }
  .prose h4 { font-size: 15px; margin: 22px 0 8px; }
  .prose ul, .prose ol { padding-left: 20px; }
  .prose pre { padding: 12px 14px; font-size: 12px; line-height: 1.55; border-radius: 10px; }
  .prose code { font-size: 0.86em; padding: 1px 5px; }
  .prose th, .prose td { padding: 8px 10px; font-size: 12.5px; }
  .prose blockquote { padding: 10px 14px; }

  footer.site { padding: 24px 0; margin-top: 40px; }
  footer.site .row { flex-direction: column; gap: 12px; text-align: center; }
  footer.site .links { justify-content: center; flex-wrap: wrap; gap: 8px 16px; }
}