:root{
  --bg:#0f1115;
  --ink:#e7e9ee;
  --mute:#9aa3b2;
  --accent:#6ea8ff;
  --accent2:#2ad8a5;
  --border:#222733;
  --panel:#151923;
  --warn:#ffb86b;
  --code-bg:#1c2130;
  --code-ink:#cfd6e4;
  color-scheme:dark light;
}

@media (prefers-color-scheme: light){
  :root{
    --bg:#fafbfc;
    --ink:#1a1f2b;
    --mute:#5a6275;
    --accent:#2f6bd8;
    --accent2:#0a8765;
    --border:#e0e4eb;
    --panel:#ffffff;
    --warn:#b4651f;
    --code-bg:#eef1f7;
    --code-ink:#2c3444;
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font:15px/1.55 system-ui,-apple-system,"Segoe UI",Inter,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
code{font:13px ui-monospace,Consolas,monospace;background:var(--code-bg);padding:1px 6px;border-radius:4px;color:var(--code-ink)}
pre code{background:transparent;padding:0;border-radius:0}
img,svg{max-width:100%;height:auto}
::selection{background:var(--accent);color:var(--bg)}

/* skip-link removed — <main id="main"> landmark still provides screen-reader jump target */

.nav{border-bottom:1px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:10;backdrop-filter:saturate(180%) blur(6px)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:56px;flex-wrap:wrap;gap:8px}
.brand{font-weight:700;letter-spacing:.2px;color:var(--ink);font-size:17px;display:inline-flex;align-items:center;gap:8px}
.brand::before{content:"";display:inline-block;width:20px;height:20px;background:url("/favicon.svg") center/contain no-repeat}
.brand:hover{text-decoration:none;color:var(--accent)}
.nav nav{display:flex;flex-wrap:wrap}
.nav nav a{margin-left:20px;color:var(--mute);font-size:14px;transition:color .15s}
.nav nav a:hover,.nav nav a.active{color:var(--ink);text-decoration:none}
.nav nav a.ext::after{content:" \2197";color:var(--mute)}

.hero{padding:64px 0 40px;border-bottom:1px solid var(--border);background:
  radial-gradient(1200px 400px at 20% -10%,rgba(110,168,255,.10),transparent 60%),
  radial-gradient(900px 300px at 80% 0%,rgba(42,216,165,.07),transparent 60%)}
.hero h1{font-size:clamp(28px,5vw,44px);line-height:1.12;margin:0 0 16px;max-width:860px;font-weight:700;letter-spacing:-.5px}
.hero .lede{font-size:clamp(15px,2vw,17px);color:var(--ink);opacity:.88;max-width:820px;margin:0 0 24px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:10px 18px;border:1px solid var(--border);border-radius:8px;color:var(--ink);background:var(--panel);font-weight:500;transition:border-color .15s,filter .15s,transform .05s;cursor:pointer}
.btn:hover{border-color:var(--accent);text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);color:#0a0d14;border-color:var(--accent)}
.btn.primary:hover{filter:brightness(1.08)}
.meta{color:var(--mute);font-size:13px;margin-top:18px}

.features{padding:56px 0;border-bottom:1px solid var(--border)}
.features h2{font-size:24px;margin:0 0 24px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.grid article{background:var(--panel);border:1px solid var(--border);padding:22px;border-radius:10px;transition:border-color .15s,transform .15s}
.grid article:hover{border-color:var(--accent)}
.grid h3{margin:0 0 8px;font-size:17px;color:var(--accent2)}
.grid p{margin:0;color:var(--ink);opacity:.85;font-size:14px}

.positioning{padding:48px 0;border-bottom:1px solid var(--border)}
.positioning h2{font-size:22px;margin:0 0 18px}
.who{padding-left:18px;color:var(--ink);opacity:.9}
.who li{margin:6px 0}
.note{margin-top:22px;padding:14px 18px;background:var(--panel);border-left:3px solid var(--warn);border-radius:6px;color:var(--ink);font-size:14px}

footer{padding:28px 0;color:var(--mute);font-size:13px}
footer .small{color:var(--mute);opacity:.7;font-size:12px;margin-top:8px}

.doc{padding:40px 0 80px;max-width:820px}
.doc h1{font-size:clamp(24px,4vw,32px);margin:0 0 16px;line-height:1.2}
.doc h2{font-size:20px;margin:32px 0 12px;border-bottom:1px solid var(--border);padding-bottom:6px}
.doc h3{font-size:16px;margin:22px 0 8px}
.doc p,.doc li{color:var(--ink);opacity:.9}
.doc dl{margin:0 0 18px}
.doc dt{font-weight:600;margin-top:12px;color:var(--accent2)}
.doc dd{margin:2px 0 0 0;color:var(--ink);opacity:.85}
.doc table.dl{width:100%;border-collapse:collapse;margin:14px 0}
.doc table.dl th,.doc table.dl td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:top}
.doc table.dl th{color:var(--mute);font-weight:500;width:160px}
.doc pre{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:14px 18px;overflow-x:auto;color:var(--code-ink);line-height:1.5}
.banner.warn{background:color-mix(in srgb,var(--warn) 12%,var(--panel));border:1px solid color-mix(in srgb,var(--warn) 40%,var(--border));color:var(--warn);padding:14px 18px;border-radius:8px;margin:20px 0}
.muted{color:var(--mute);font-size:13px}
.lede{font-size:16px;color:var(--ink);opacity:.9}

@media (max-width:600px){
  .nav nav a{margin-left:12px;font-size:13px}
  .doc table.dl th{width:120px}
  .hero{padding:48px 0 32px}
  .features,.positioning{padding:40px 0}
}

@media print{
  .nav,.cta,footer{display:none}
  body{background:#fff;color:#000}
  .hero{background:none;padding:20px 0}
  .grid article{break-inside:avoid}
}