:root {
  --bg: #ffffff;
  --bg-alt: #f6f8fa;
  --fg: #1f2328;
  --fg-dim: #59636e;
  --line: #d1d9e0;
  --accent: #1f6feb;
  --code-bg: #f0f3f6;
  --radius: 10px;
  --wrap: 960px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-alt: #161b22;
    --fg: #e6edf3;
    --fg-dim: #9198a1;
    --line: #30363d;
    --accent: #4d9bff;
    --code-bg: #1b2028;
  }
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
        Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 560px; }

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

code, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
               "Liberation Mono", monospace;
  font-size: 0.9em;
}

code {
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 5px;
}

/* ── header ─────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 60px; gap: 16px;
}
.brand {
  display: inline-flex; align-items: center; gap: 9px;
  color: var(--fg); font-weight: 650; letter-spacing: -0.01em; font-size: 1.05rem;
}
.brand:hover { text-decoration: none; }
.brand-mark { color: var(--accent); flex: none; }
.site-nav { display: flex; gap: 22px; font-size: 0.92rem; }
.site-nav a { color: var(--fg-dim); }
.site-nav a:hover { color: var(--fg); text-decoration: none; }

/* ── hero ───────────────────────────────────────────── */
.hero { padding: 84px 0 68px; border-bottom: 1px solid var(--line); }
.eyebrow {
  margin: 0 0 14px; font-size: 0.82rem; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--fg-dim);
}
.hero h1 {
  margin: 0 0 20px; font-size: clamp(2rem, 5.2vw, 3rem);
  line-height: 1.15; letter-spacing: -0.028em; font-weight: 700;
  max-width: 20ch;
}
.lede { margin: 0; font-size: 1.09rem; color: var(--fg-dim); max-width: 62ch; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

.btn {
  display: inline-block; padding: 10px 20px; border-radius: var(--radius);
  background: var(--accent); color: #fff; font-weight: 560; font-size: 0.95rem;
  border: 1px solid transparent; transition: opacity .15s ease;
}
.btn:hover { opacity: .88; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--fg-dim); opacity: 1; }

/* ── sections ───────────────────────────────────────── */
.section { padding: 68px 0; }
.section.alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.section h2 {
  margin: 0 0 10px; font-size: 1.55rem;
  letter-spacing: -0.018em; font-weight: 650;
}
.section-lede { margin: 0 0 34px; color: var(--fg-dim); max-width: 62ch; }

.grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(232px, 1fr));
}
.card {
  background: var(--bg); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.section.alt .card { background: var(--bg); }
.card h3 { margin: 0 0 10px; font-size: 1rem; font-weight: 620; }
.card h3 code { background: none; padding: 0; color: var(--accent); font-size: 1rem; }
.card p { margin: 0; font-size: 0.93rem; color: var(--fg-dim); }

/* ── code block ─────────────────────────────────────── */
.code {
  margin: 0 0 24px; padding: 22px;
  background: var(--code-bg); border: 1px solid var(--line);
  border-radius: var(--radius); overflow-x: auto;
  font-size: 0.87rem; line-height: 1.95; color: var(--fg);
}
.code .c { color: var(--fg-dim); }
.note { margin: 0; font-size: 0.93rem; color: var(--fg-dim); }

/* ── changelog ──────────────────────────────────────── */
.log { margin: 0; }
.log dt {
  display: flex; align-items: baseline; gap: 14px;
  padding-top: 22px; margin-top: 22px; border-top: 1px solid var(--line);
}
.log dt:first-of-type { padding-top: 0; margin-top: 0; border-top: 0; }
.log .ver { font-weight: 640; font-variant-numeric: tabular-nums; }
.log time { font-size: 0.85rem; color: var(--fg-dim); font-variant-numeric: tabular-nums; }
.log dd { margin: 8px 0 0; color: var(--fg-dim); font-size: 0.94rem; max-width: 66ch; }

/* ── footer ─────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line); padding: 34px 0;
  font-size: 0.88rem; color: var(--fg-dim);
}
.site-footer p { margin: 0; }

@media (max-width: 560px) {
  .hero { padding: 56px 0 46px; }
  .section { padding: 50px 0; }
  .site-nav { gap: 16px; font-size: 0.88rem; }
}