:root{
  --ink:#0B0F16; --ink-2:#10161F;
  --line:rgba(150,172,196,.14); --line-strong:rgba(150,172,196,.24);
  --text:#E7EEF5; --text-dim:#93A0AD;
  --accent:#22C4E6; --accent-soft:rgba(34,196,230,.15);
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
}
@media (prefers-color-scheme: light){
  :root{
    --ink:#F2F5F8; --ink-2:#FFFFFF;
    --line:rgba(22,44,64,.12); --line-strong:rgba(22,44,64,.20);
    --text:#132532; --text-dim:#51606D;
    --accent:#0A78C4; --accent-soft:rgba(10,120,196,.11);
  }
}
:root[data-theme="dark"]{
  --ink:#0B0F16; --ink-2:#10161F;
  --line:rgba(150,172,196,.14); --line-strong:rgba(150,172,196,.24);
  --text:#E7EEF5; --text-dim:#93A0AD;
  --accent:#22C4E6; --accent-soft:rgba(34,196,230,.15);
}
:root[data-theme="light"]{
  --ink:#F2F5F8; --ink-2:#FFFFFF;
  --line:rgba(22,44,64,.12); --line-strong:rgba(22,44,64,.20);
  --text:#132532; --text-dim:#51606D;
  --accent:#0A78C4; --accent-soft:rgba(10,120,196,.11);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--font-sans); background:var(--ink); color:var(--text);
  line-height:1.7; -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
.wrap{max-width:760px; margin:0 auto; padding:0 24px}

/* header */
header.site{
  border-bottom:1px solid var(--line); position:sticky; top:0; z-index:5;
  backdrop-filter:saturate(140%) blur(10px);
  background:color-mix(in srgb, var(--ink) 82%, transparent);
}
header.site .row{display:flex; align-items:center; gap:18px; height:58px}
.brand{display:inline-flex; align-items:center; font-family:var(--font-mono); font-weight:700; letter-spacing:.02em; color:var(--text); text-decoration:none; font-size:17px}
.brand-logo{width:23px; height:23px; flex:none; display:block; margin-right:8px}
.brand .dot{color:var(--accent)}
header.site nav{margin-left:auto; display:flex; gap:20px; align-items:center}
header.site nav a{font-size:13.5px; color:var(--text-dim); text-decoration:none; transition:color .15s}
header.site nav a:hover{color:var(--text)}
header.site nav a[aria-current]{color:var(--accent)}
.theme-btn{
  font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; color:var(--text-dim);
  border:1px solid var(--line-strong); background:transparent; border-radius:6px; padding:5px 9px; cursor:pointer;
  transition:color .15s, border-color .15s;
}
.theme-btn:hover{color:var(--text); border-color:var(--accent)}
.theme-btn:focus-visible{outline:2px solid var(--accent); outline-offset:2px}
@media (max-width:560px){ header.site nav a.navlink{display:none} }

/* document */
main{padding:52px 0 8px}
.eyebrow{font-family:var(--font-mono); font-size:11px; letter-spacing:.22em; text-transform:uppercase; color:var(--accent); margin-bottom:12px}
h1{font-family:var(--font-mono); font-weight:700; letter-spacing:-.02em; font-size:clamp(28px,5vw,38px); margin:0 0 8px; text-wrap:balance}
.updated{font-family:var(--font-mono); font-size:12.5px; color:var(--text-dim); margin:0 0 34px}
.lead{color:var(--text-dim); font-size:17.5px; margin:0 0 8px}
h2{font-size:19px; font-weight:650; letter-spacing:-.01em; margin:40px 0 10px}
h3{font-size:15.5px; font-weight:650; margin:24px 0 6px}
p{font-size:15.5px; margin:12px 0}
ul,ol{padding-left:22px; margin:12px 0}
li{font-size:15.5px; margin:7px 0}
strong{font-weight:650}
em{color:var(--text-dim); font-style:italic}
a{color:var(--accent); text-decoration:none; border-bottom:1px solid var(--accent-soft)}
a:hover{border-color:var(--accent)}
a:focus-visible{outline:2px solid var(--accent); outline-offset:2px; border-radius:2px}
.mono{font-family:var(--font-mono)}
hr{border:0; border-top:1px solid var(--line); margin:40px 0}
dl.faq dt{font-weight:650; font-size:15.5px; margin-top:22px}
dl.faq dd{margin:6px 0 0; padding:0; color:var(--text); font-size:15.5px}

/* cards, buttons, checklists — used by /thanks and /download */
.card{background:var(--ink-2); border:1px solid var(--line); border-radius:12px; padding:6px 22px 20px; margin:22px 0}
.card.accent{border-color:color-mix(in srgb, var(--accent) 34%, var(--line))}
.card h2,.card h3{margin-top:22px}
.card p:last-child,.card ul:last-child{margin-bottom:0}
.btnrow{display:flex; flex-wrap:wrap; gap:12px; align-items:center; margin:22px 0 4px}
.btn{
  display:inline-flex; align-items:center; gap:9px; font-family:var(--font-mono); font-size:13.5px;
  padding:11px 17px; border-radius:9px; border:1px solid var(--line-strong); color:var(--text);
  transition:color .15s, border-color .15s, transform .12s;
}
.btn:hover{color:var(--accent); border-color:var(--accent)}
.btn-primary{background:var(--accent); color:var(--ink); border-color:var(--accent); font-weight:650}
.btn-primary:hover{color:var(--ink); transform:translateY(-1px)}
.pill{
  display:inline-flex; align-items:center; gap:8px; font-family:var(--font-mono); font-size:11px;
  letter-spacing:.16em; text-transform:uppercase; color:var(--text-dim);
  border:1px solid var(--line-strong); border-radius:20px; padding:4px 12px;
}
.pill i{width:6px; height:6px; border-radius:50%; background:currentColor; flex:none}
.pill.live{color:var(--accent); border-color:var(--accent)}
ul.checks{list-style:none; padding:0; margin:14px 0}
ul.checks li{display:flex; gap:11px; align-items:flex-start; margin:9px 0}
ul.checks li svg{flex:none; width:16px; height:16px; margin-top:5px; color:var(--accent)}
.fine{font-size:13.5px; color:var(--text-dim)}

/* release gating — driven by the RELEASE FLAG script in /thanks and /download.
   Default (no data-released on <html>, incl. scripting disabled) = pre-release copy. */
[data-when="released"]{display:none}
:root[data-released] [data-when="released"]{display:block}
:root[data-released] [data-when="prerelease"]{display:none}

/* footer */
footer.site{border-top:1px solid var(--line); padding:28px 0; margin-top:52px; color:var(--text-dim); font-size:13px}
footer.site .row{display:flex; gap:16px; flex-wrap:wrap; justify-content:space-between; align-items:center}
footer.site .row .mono{color:var(--text-dim)}
footer.site a{color:var(--text-dim); border:0}
footer.site a:hover{color:var(--accent)}