:root {
  --bg: #0b0d12;
  --bg-elev: #14171f;
  --bg-elev-2: #1c2030;
  --border: #262b3b;
  --border-strong: #353b50;
  --text: #e7e9ee;
  --text-dim: #9aa0b0;
  --text-faint: #6b7280;
  --accent: #7c8cff;
  --accent-hover: #94a1ff;
  --accent-bg: rgba(124, 140, 255, 0.12);
  --mono: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
}
[data-theme="light"] {
  --bg: #ffffff;
  --bg-elev: #f6f7fb;
  --bg-elev-2: #eceef5;
  --border: #e3e6ee;
  --border-strong: #c7cce0;
  --text: #14171f;
  --text-dim: #535766;
  --text-faint: #8a8f9e;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-bg: rgba(79, 70, 229, 0.08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.6em; letter-spacing: -0.01em; color: var(--text); }
h1 { font-size: clamp(1.7rem, 2.5vw + 1rem, 2.3rem); font-weight: 700; letter-spacing: -0.02em; margin-top: 0.2em; }
h2 { font-size: 1.4rem; font-weight: 650; margin-top: 2rem; }
h3 { font-size: 1.1rem; font-weight: 600; margin-top: 1.5rem; }
p, li { color: var(--text-dim); }
p { margin: 0 0 1em; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 1.25rem; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(8px);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 56px; max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }
.brand {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-weight: 700; color: var(--text); letter-spacing: -0.01em; font-size: 1.05rem;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 5px;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 50%, #000));
  display: grid; place-items: center; color: #fff; font-family: var(--mono); font-size: 0.75rem; font-weight: 700;
}
.nav-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-links a { color: var(--text-dim); font-size: 0.92rem; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.theme-toggle {
  background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  width: 32px; height: 32px; border-radius: 6px; cursor: pointer;
  display: grid; place-items: center;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.theme-toggle svg { width: 16px; height: 16px; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun { display: block; }
.theme-toggle .icon-moon { display: none; }

main { padding: 2.5rem 0 3rem; }
.lede { font-size: 1.075rem; color: var(--text-dim); max-width: 65ch; }
.last-updated { font-size: 0.85rem; color: var(--text-faint); margin-bottom: 1.5rem; }

.prose ul, .prose ol { padding-left: 1.2rem; }
.prose li { margin-bottom: 0.4rem; }
.prose code, .inline-code {
  font-family: var(--mono); font-size: 0.86em;
  background: var(--bg-elev); border: 1px solid var(--border);
  padding: 0.05em 0.35em; border-radius: 4px;
}
.prose blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.4rem 0 0.4rem 1rem;
  margin: 1rem 0;
  color: var(--text); font-style: italic;
}

.callout {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}
.callout p:last-child { margin-bottom: 0; }

.contact-block {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  font-family: var(--mono); font-size: 0.92rem;
  margin: 1rem 0 1.5rem;
}
.contact-block dt { color: var(--text-faint); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; margin-top: 0.6rem; }
.contact-block dt:first-child { margin-top: 0; }
.contact-block dd { margin: 0.2rem 0 0; color: var(--text); }
.contact-block dd a { color: var(--accent); }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 3rem;
  color: var(--text-faint);
  font-size: 0.88rem;
}
.footer-row {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem 2rem; align-items: center;
  max-width: 1080px; margin: 0 auto; padding: 0 1.25rem;
}
.footer-row a { color: var(--text-dim); }
.footer-row a:hover { color: var(--text); }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; }
.footer-links a { font-size: 0.85rem; }
.footer-meta { font-size: 0.85rem; color: var(--text-faint); }

@media (max-width: 640px) {
  .nav-links a:not(.theme-toggle) { display: none; }
  .footer-row { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}