:root{
  --ink:#1c1917; --muted:#6b7280; --faint:#737373; /* a11y: faint bumped from #9ca3af for AA */
  --bg:#f5f5f3; --surface:#ffffff; --surface-2:#fafaf9;
  --border:#e7e5e4; --border-2:#d6d3d1;
  --accent:#4f46e5; --accent-2:#7c3aed;
  --serif:'Charter','Iowan Old Style','Georgia',serif;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI','Inter',sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  -webkit-font-smoothing:antialiased;font-size:16px;line-height:1.6}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
/* a11y: visible keyboard focus, skip link, reduced-motion */
button:focus-visible, a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px}
.skip{position:absolute;left:-9999px;top:-9999px;z-index:1000}
.skip:focus{left:12px;top:12px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:8px;text-decoration:none;font-weight:600;font-size:13px}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:0.001ms!important;animation-iteration-count:1!important;transition-duration:0.001ms!important}}
.nav{position:sticky;top:0;z-index:10;background:rgba(245,245,243,.85);backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--border)}
.nav-in{max-width:780px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;color:var(--ink)}
.brand .dot{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:8px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-weight:700;font-size:14px}
.nav .grow{flex:1}
.nav a{color:var(--ink);font-weight:500;font-size:14px}
.nav .cta{background:var(--ink);color:#fff;padding:8px 14px;border-radius:99px;font-size:14px}
.nav .cta:hover{text-decoration:none;opacity:.92}
.wrap{max-width:720px;margin:0 auto;padding:56px 24px 24px}
h1{font-family:var(--serif);font-size:42px;line-height:1.1;margin:0 0 20px;letter-spacing:-.01em}
h2{font-family:var(--serif);font-size:22px;margin:34px 0 10px;letter-spacing:-.005em}
.lead{font-size:18px;color:var(--muted);margin:0 0 26px}
p{margin:0 0 16px;color:var(--ink)}
ul{margin:0 0 16px;padding-left:22px}
ul li{margin:6px 0;color:var(--ink)}
.callout{padding:18px 20px;border-left:3px solid var(--accent);background:var(--surface);
  border-radius:8px;color:var(--ink);margin:18px 0;font-size:15px}
code{background:var(--surface);border:1px solid var(--border);padding:2px 6px;border-radius:6px;font-size:13.5px;
  font-family:ui-monospace,Consolas,monospace}
footer{margin-top:80px;padding:32px 24px 48px;border-top:1px solid var(--border);background:var(--surface-2)}
.foot-in{max-width:780px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px;
  color:var(--muted);font-size:13px}
.foot-in nav{display:flex;gap:18px}
.foot-in nav a{color:var(--muted)}
.ver{color:var(--faint);font-variant-numeric:tabular-nums;font-size:12px}
@media (max-width:560px){h1{font-size:32px}.wrap{padding:36px 20px}}