/* Layout: sticky bar, two-column hero (thesis | ledger excerpt), then ruled sections with a mono label rail.
   Palette: graphite and paper with the orange of real flight recorders. System fonts only: no font host. */
:root{
  --bg:#f4f5f3; --surface:#ffffff; --fg:#15181b; --muted:#59616a; --line:#d9dcd8;
  --accent:#c2410c; --accent-fg:#ffffff; --code:#eceee9;
  --deny:#b42318; --deny-bg:#fde8e6; --ask:#8a5a00; --ask-bg:#fcf0d4; --ok:#256b3e; --ok-bg:#e1f1e6;
  --display:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Mono","JetBrains Mono",Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0f1113; --surface:#171a1d; --fg:#e9ebed; --muted:#9aa2aa; --line:#2a2f34;
  --accent:#ff8a4c; --accent-fg:#14100d; --code:#1a1e22;
  --deny:#ff8f86; --deny-bg:#3a1a18; --ask:#f3c35c; --ask-bg:#35290d; --ok:#7bd69a; --ok-bg:#15301f;color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0f1113; --surface:#171a1d; --fg:#e9ebed; --muted:#9aa2aa; --line:#2a2f34;
  --accent:#ff8a4c; --accent-fg:#14100d; --code:#1a1e22;
  --deny:#ff8f86; --deny-bg:#3a1a18; --ask:#f3c35c; --ask-bg:#35290d; --ok:#7bd69a; --ok-bg:#15301f;color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 var(--display);-webkit-font-smoothing:antialiased}
.wrap{max-width:1040px;margin:0 auto;padding-inline:20px}
a{color:var(--accent);text-underline-offset:3px}
a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}
code,pre{font-family:var(--mono)}
code{font-size:.88em;background:var(--code);padding:.1em .38em;border-radius:3px}
pre{margin:0;background:var(--code);border:1px solid var(--line);border-radius:6px;padding:16px 18px;overflow-x:auto;font-size:.84rem;line-height:1.7}
pre code{background:none;padding:0;font-size:inherit}

header.top{position:sticky;top:0;z-index:5;background:var(--bg);border-bottom:1px solid var(--line)}
nav{display:flex;flex-wrap:wrap;align-items:center;gap:6px 22px;padding-block:12px;font-size:.92rem}
nav strong{margin-right:auto;font-family:var(--mono);font-size:.95rem;letter-spacing:-.01em}
nav strong::before{content:"";display:inline-block;width:.6em;height:.6em;background:var(--accent);border-radius:50%;margin-right:.55em}
nav a{color:var(--muted);text-decoration:none}
nav a:hover{color:var(--fg)}

.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:40px;align-items:center;padding-block:64px 56px}
@media (max-width:820px){.hero{grid-template-columns:minmax(0,1fr);gap:28px;padding-block:40px 36px}}
.eyebrow{font:600 .74rem/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 14px}
h1{font-size:clamp(2rem,4.6vw,3.2rem);line-height:1.08;letter-spacing:-.025em;font-weight:760;margin:0 0 18px;text-wrap:balance}
.lead{font-size:1.1rem;color:var(--muted);margin:0 0 14px;max-width:60ch}
.facts{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 0;padding:0;list-style:none}
.facts li{font:500 .78rem/1 var(--mono);border:1px solid var(--line);border-radius:999px;padding:7px 11px;color:var(--muted)}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn{display:inline-block;padding:10px 18px;border-radius:6px;font-weight:600;font-size:.95rem;text-decoration:none;border:1px solid var(--line);color:var(--fg)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-fg)}
.btn:hover{filter:brightness(1.07)}

.ledger{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden;min-width:0}
.ledger-head{display:flex;justify-content:space-between;gap:12px;padding:10px 14px;border-bottom:1px solid var(--line);font:500 .72rem/1.4 var(--mono);color:var(--muted);letter-spacing:.04em;text-transform:uppercase}
.ledger-body{overflow-x:auto}
.rec{display:grid;grid-template-columns:2.2rem 4.6rem minmax(0,1fr);gap:0 12px;padding:9px 14px;border-bottom:1px solid var(--line);font:.78rem/1.5 var(--mono);align-items:start}
.rec:last-child{border-bottom:0}
.rec .seq{color:var(--muted)}
.rec .cmd{color:var(--fg);overflow-wrap:anywhere}
.rec .why{grid-column:3;color:var(--muted);font-size:.72rem}
.tag{display:inline-block;font:700 .68rem/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:4px 7px;border-radius:3px}
.tag.ok{background:var(--ok-bg);color:var(--ok)}
.tag.deny{background:var(--deny-bg);color:var(--deny)}
.tag.ask{background:var(--ask-bg);color:var(--ask)}
.ledger-foot{padding:9px 14px;border-top:1px solid var(--line);font:.72rem/1.4 var(--mono);color:var(--muted)}

section.block{display:grid;grid-template-columns:150px minmax(0,1fr);gap:8px 40px;padding-block:44px;border-top:1px solid var(--line)}
@media (max-width:760px){section.block{grid-template-columns:minmax(0,1fr);gap:14px;padding-block:34px}}
.label{font:600 .74rem/1.4 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding-top:.5rem}
.content{min-width:0}
h2{font-size:1.55rem;line-height:1.2;letter-spacing:-.015em;margin:0 0 14px;text-wrap:balance}
p{margin:0 0 14px;max-width:68ch}
ul.plain{margin:0;padding-left:1.1em;max-width:68ch}
ul.plain li{margin-bottom:8px}
.stack{display:grid;gap:14px}

dl.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:0;margin:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--surface)}
dl.feat div{padding:18px 20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);margin:-1px -1px 0 0}
dl.feat dt{font-weight:650;margin-bottom:4px}
dl.feat dd{margin:0;color:var(--muted);font-size:.93rem}

.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.92rem;min-width:560px}
th{font:600 .7rem/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}
td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:0}
td:first-child{white-space:nowrap}
td:first-child code{background:none;padding:0;font-weight:600}

footer{border-top:1px solid var(--line);padding-block:28px;color:var(--muted);font-size:.88rem}

.videos{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:20px}
figure.clip{margin:0;min-width:0}
figure.clip video{display:block;width:100%;height:auto;aspect-ratio:16/9;border:1px solid var(--line);border-radius:8px;background:#0f1113}
figure.clip figcaption{font-size:.9rem;color:var(--muted);margin-top:8px}
.cta-band{border-top:1px solid var(--line);padding-block:48px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px 32px;align-items:center}
@media (max-width:700px){.cta-band{grid-template-columns:minmax(0,1fr)}}
.cta-band h2{margin:0 0 6px}
.cta-band p{margin:0}
.cta-band .cta{margin:0}