:root{--paper:#f2efe7;--ink:#171713;--muted:#6c6a61;--rule:#c9c5b8;--claude:#d65f3e;--codex:#16745b;--accent:var(--claude);--max:1440px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Songti SC","Noto Serif CJK SC",Georgia,serif;line-height:1.7}.skip{position:fixed;left:12px;top:-60px;z-index:99;background:#fff;padding:10px}.skip:focus{top:12px}.masthead{max-width:var(--max);margin:auto;padding:72px clamp(22px,6vw,96px) 48px;border-bottom:1px solid var(--ink)}.eyebrow,.provenance,.facts,.section-number,label{font-family:"SFMono-Regular",Consolas,monospace;letter-spacing:.08em;text-transform:uppercase;font-size:12px}.masthead h1{font-size:clamp(54px,8vw,116px);line-height:.88;letter-spacing:-.065em;margin:34px 0 42px;font-weight:600}.masthead h1 em{color:var(--accent);font-style:italic}.foreword{max-width:1060px;columns:2;column-gap:clamp(28px,5vw,72px);column-rule:1px solid var(--rule);font-size:17px;line-height:1.78}.foreword p{margin:0 0 1.15em;break-inside:avoid}.foreword p:first-child::first-letter{float:left;font-size:4.2em;line-height:.75;padding:.12em .1em 0 0;color:var(--accent)}.foreword-source{font-family:"SFMono-Regular",Consolas,monospace;font-size:11px;color:var(--muted);letter-spacing:.03em}.facts{display:flex;gap:10px;flex-wrap:wrap;margin-top:34px}.facts span,.provenance{border:1px solid var(--rule);padding:5px 9px;border-radius:99px}.brief,.archive{max-width:var(--max);margin:auto;display:grid;grid-template-columns:80px 1fr;padding:52px clamp(22px,6vw,96px);border-bottom:1px solid var(--rule)}.brief>div:last-child{max-width:920px}.brief h2,.rail h2{font-size:36px;margin:0 0 18px}.brief p{font-size:19px}.section-number{color:var(--muted)}button,input{font:inherit}.text-button{border:0;background:none;color:var(--accent);font-weight:700;padding:8px 0;cursor:pointer}.archive{grid-template-columns:250px minmax(0,1fr);gap:48px}.rail{position:sticky;top:24px;align-self:start}.tabs{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--ink);margin:22px 0}.tabs button,.language button{border:0;background:transparent;padding:12px 8px;min-height:44px;cursor:pointer}.tabs button[aria-selected=true],.language button[aria-selected=true]{background:var(--ink);color:var(--paper)}.versions{border-top:1px solid var(--rule)}.versions button{display:block;width:100%;text-align:left;border:0;border-bottom:1px solid var(--rule);background:none;padding:18px 8px;cursor:pointer}.versions button[aria-current=true]{color:var(--accent);padding-left:18px}.secondary,.icon-button{background:none;border:1px solid var(--ink);min-height:44px;padding:8px 14px;margin-top:20px;cursor:pointer}.reader{min-width:0}.reader-head{display:flex;justify-content:space-between;gap:24px;border-bottom:1px solid var(--ink);padding-bottom:28px}.reader h2{font-size:clamp(34px,5vw,70px);line-height:1;margin:18px 0}.reader-actions{flex:0 0 auto}.language{display:flex;border:1px solid var(--ink)}.changes{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);margin:28px 0;border:1px solid var(--rule)}.change{background:var(--paper);padding:18px}.change b{display:block;color:var(--accent);font-family:monospace;font-size:12px;text-transform:uppercase}.searchbar{display:grid;grid-template-columns:1fr auto;gap:8px;margin:28px 0}.searchbar label{grid-column:1/-1}.searchbar input{border:1px solid var(--rule);background:transparent;padding:12px;min-width:0}.prompt{white-space:pre-wrap;overflow-wrap:anywhere;font-family:"SFMono-Regular","Noto Sans Mono CJK SC",monospace;font-size:15px;line-height:1.8;margin:0;background:#1c1d19;color:#ece9df;padding:clamp(20px,4vw,54px);border-radius:2px;max-height:none;tab-size:2}.source-card{margin-top:26px;padding:22px;border:1px solid var(--rule);font-family:monospace;font-size:13px;overflow-wrap:anywhere}.source-card a{color:var(--accent)}dialog{width:min(760px,calc(100% - 30px));max-height:88vh;border:1px solid var(--ink);background:var(--paper);color:var(--ink);padding:42px}dialog::backdrop{background:#171713bb}.modal-close{position:absolute;right:10px;top:10px;border:0;background:none;font-size:28px}#toast{position:fixed;right:20px;bottom:20px;background:var(--ink);color:var(--paper);padding:10px 16px;opacity:0;transition:.2s;pointer-events:none}#toast.show{opacity:1}
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