:root{--ink:#172832;--muted:#536773;--accent:#086f73;--paper:#fcfbf7;--line:#dbe3e4}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font:17px/1.65 Georgia,serif}
header{border-bottom:1px solid var(--line);padding:18px 5vw;font:14px/1.5 system-ui,sans-serif;display:flex;gap:20px;justify-content:space-between;flex-wrap:wrap}
a{color:var(--accent);text-underline-offset:3px}main{max-width:1000px;margin:auto;padding:40px 28px 70px}
.eyebrow,.meta,.nav,.controls,button,input,select,summary,footer{font-family:system-ui,sans-serif}.eyebrow{font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:var(--accent)}
h1{font-size:clamp(30px,5vw,49px);line-height:1.13;max-width:800px}h2{font-size:26px;line-height:1.3;margin-top:38px}h3{font-size:20px}h1,h2,h3{overflow-wrap:anywhere}select{max-width:100%;min-width:0}
.meta{font-size:13px;color:var(--muted)}p{max-width:78ch}pre{overflow:auto;padding:20px;background:#eef2f1;border:1px solid var(--line);border-radius:5px;font:13px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;tab-size:4}
code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.87em}pre code{font-size:inherit}
details{border-top:1px solid var(--line);margin-top:32px;padding-top:20px}summary{cursor:pointer;color:var(--accent);font-weight:650;padding:12px 0}
.card{border-left:4px solid var(--accent);padding:1px 20px;background:#eff5f2}.nav{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:20px;border-top:1px solid var(--line);font-size:14px}
button{cursor:pointer;padding:9px 13px;border:1px solid #8aa6a7;border-radius:4px;background:white;color:var(--ink)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #dd983c;outline-offset:3px}
.controls{display:flex;gap:12px;flex-wrap:wrap;margin:25px 0}input,select{font-size:15px;padding:10px;border:1px solid #8aa6a7;border-radius:4px;background:white}input{flex:1;min-width:220px}
.toc{list-style:none;padding:0}.toc li{padding:12px 0;border-bottom:1px solid var(--line)}.toc a{text-decoration:none}.toc .meta{display:block}.trace pre{font-size:12px}.code-tools{display:flex;justify-content:flex-end}.muted{color:var(--muted)}footer{max-width:1000px;margin:auto;padding:25px 28px;font-size:12px;color:var(--muted);border-top:1px solid var(--line)}
@media(max-width:600px){main{padding:28px 18px}pre{padding:12px;font-size:12px}.nav{flex-direction:column}}
@media print{header,.controls,.code-tools,.nav,.progress-button{display:none}main{max-width:none;padding:0}details{display:block}details>summary{display:none}pre{white-space:pre-wrap;overflow:visible;font-size:9px}body{background:white;font-size:11pt}h2{break-after:avoid}a{color:inherit}}