:root{
  --ground:#E7ECEB; --surface:#F8FAFA; --surface-2:#EEF3F2;
  --ink:#0D1A1B; --ink-2:#4C6061; --ink-3:#7A8D8D;
  --rule:#C6D2D1; --rule-strong:#9DAFAE;
  --accent:#0B6B62; --accent-soft:#D3E5E2;
  --warn:#846512;
  --shadow:0 1px 0 rgba(13,26,27,.05), 0 8px 24px -18px rgba(13,26,27,.5);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ground:#0A1314; --surface:#111C1D; --surface-2:#162324;
    --ink:#DDE8E7; --ink-2:#92A6A5; --ink-3:#6A7D7D;
    --rule:#223435; --rule-strong:#33484A;
    --accent:#4FC3B2; --accent-soft:#12312E;
    --warn:#D6AB4A;
    --shadow:0 1px 0 rgba(0,0,0,.35), 0 8px 24px -18px rgba(0,0,0,.9);
  }
}
:root[data-theme="dark"]{
  --ground:#0A1314; --surface:#111C1D; --surface-2:#162324;
  --ink:#DDE8E7; --ink-2:#92A6A5; --ink-3:#6A7D7D;
  --rule:#223435; --rule-strong:#33484A;
  --accent:#4FC3B2; --accent-soft:#12312E;
  --warn:#D6AB4A;
  --shadow:0 1px 0 rgba(0,0,0,.35), 0 8px 24px -18px rgba(0,0,0,.9);
}
*,*::before,*::after{box-sizing:border-box}
body{
  margin:0; background:var(--ground); color:var(--ink);
  font-family:"Source Serif 4",Georgia,"Times New Roman",serif;
  font-size:17px; line-height:1.62;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
.wrap{max-width:960px;margin:0 auto;padding:0 28px}
.prose{max-width:68ch}
a{color:var(--accent);text-decoration:none;border-bottom:1px solid color-mix(in srgb,var(--accent) 35%,transparent)}
a:hover{border-bottom-color:var(--accent)}
a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
h1,h2,h3{font-family:"Archivo","Helvetica Neue",Arial,sans-serif;text-wrap:balance;margin:0}
h1{font-size:clamp(30px,4.4vw,46px);line-height:1.1;font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(21px,2.6vw,27px);font-weight:700;letter-spacing:-.01em;margin:56px 0 14px;padding-top:22px;border-top:1px solid var(--rule)}
h3{font-size:18px;font-weight:600;margin:30px 0 8px}
p{margin:0 0 14px}
.mono{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace}
code{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:.88em;background:var(--surface-2);padding:1px 5px;border-radius:4px}

.masthead{border-top:4px solid var(--ink);padding:34px 0 26px}
.eyebrow{font-family:"IBM Plex Mono",monospace;font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3)}
.lede{font-size:19px;color:var(--ink-2);margin-top:16px;max-width:62ch}

nav.toc{background:var(--surface);border:1px solid var(--rule);border-radius:8px;padding:18px 22px;margin:28px 0 8px;box-shadow:var(--shadow)}
nav.toc ol{margin:0;padding-left:20px;columns:2;column-gap:32px}
nav.toc li{margin:3px 0;break-inside:avoid}
@media (max-width:640px){nav.toc ol{columns:1}}

ul.plain{list-style:none;padding:0;margin:0 0 14px}
ul.plain li{padding:9px 0 9px 22px;border-bottom:1px solid var(--rule);position:relative}
ul.plain li:last-child{border-bottom:none}
ul.plain li::before{content:"";position:absolute;left:2px;top:19px;width:8px;height:1px;background:var(--rule-strong)}

.card{background:var(--surface);border:1px solid var(--rule);border-radius:8px;padding:16px 20px;margin:0 0 12px;box-shadow:var(--shadow)}
.card h3{margin:0 0 6px}
.card p{margin:0 0 8px;color:var(--ink-2)}
.card p:last-child{margin-bottom:0}
.limit{font-size:15px;color:var(--warn);border-left:2px solid var(--warn);padding-left:12px;margin-top:10px}
.limit b{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;display:block;margin-bottom:2px}

table{border-collapse:collapse;width:100%;font-size:15.5px;margin:0 0 14px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-family:"Archivo",sans-serif;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);font-weight:600}
td.mono{white-space:nowrap}
.scroll{overflow-x:auto}

.note{background:var(--accent-soft);border-radius:8px;padding:16px 20px;margin:18px 0}
.note p:last-child{margin-bottom:0}

footer{margin:64px 0 40px;padding-top:22px;border-top:1px solid var(--rule);color:var(--ink-3);font-size:15px}