/* ---------- Tokens ---------- */
:root {
  --bg: #0f1115;
  --bg-elevated: #1a1d24;
  --bg-soft: #232730;
  --border: #2d323d;
  --text: #e6e8ec;
  --text-muted: #9aa3b2;
  --accent: #4ade80;
  --accent-dim: #166534;
  --warn: #fbbf24;
  --warn-dim: #78350f;
  --info: #60a5fa;
  --info-dim: #1e3a8a;
  --danger: #f87171;
  --danger-dim: #7f1d1d;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 1px 3px rgba(0,0,0,.3), 0 4px 12px rgba(0,0,0,.2);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --max-width: 1200px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --bg-elevated: #f7f8fa;
    --bg-soft: #eef0f3;
    --border: #d8dce3;
    --text: #1a1d24;
    --text-muted: #5b6371;
    --accent: #16a34a;
    --accent-dim: #bbf7d0;
    --warn: #d97706;
    --warn-dim: #fef3c7;
    --info: #2563eb;
    --info-dim: #dbeafe;
    --danger: #dc2626;
    --danger-dim: #fecaca;
    --shadow: 0 1px 2px rgba(0,0,0,.05), 0 2px 8px rgba(0,0,0,.04);
  }
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

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

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

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-soft);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

pre {
  background: var(--bg-soft);
  padding: 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  border: 1px solid var(--border);
}
pre code { background: none; padding: 0; }

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
}
th, td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
th { font-weight: 600; color: var(--text-muted); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(150%) blur(8px);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.site-header nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.site-header nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}
.site-header nav a:hover {
  color: var(--text);
  text-decoration: none;
}

/* ---------- Main / prose ---------- */
main { padding: 2.5rem 0 4rem; min-height: 70vh; }

.prose {
  max-width: 760px;
  margin: 0 auto;
}
.prose h1 { font-size: 2rem; margin-top: 0; letter-spacing: -0.02em; }
.prose h2 { font-size: 1.5rem; margin-top: 2.5rem; letter-spacing: -0.015em; }
.prose h3 { font-size: 1.2rem; margin-top: 2rem; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.site-footer p { margin: 0; }