:root{--bg:#eceff3;--bg-2:#e3e8ee;--ink:#152033;--muted:#5a6678;--line:#c9d1db;--panel:#fbfcfd;--panel-line:#dce2e9;--chip:#eef1f5;--p1:#2a52c4;--p2:#0a7a66;--p3:#a12e69;--p4:#6b4fb8;--p5:#a8670c;--accent:var(--p5);--f-ui:"IBM Plex Sans Condensed", "Arial Narrow", system-ui, sans-serif;--f-read:"Literata", Georgia, "Times New Roman", serif;--f-mono:"IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#0c111a;--bg-2:#111826;--ink:#e5e9f0;--muted:#94a1b4;--line:#2a3546;--panel:#111824;--panel-line:#232e3f;--chip:#1a2332;--p1:#86a2ff;--p2:#45cdae;--p3:#f07db7;--p4:#b49cf2;--p5:#f1b24f;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}[data-part="1"]{--accent:var(--p1)}[data-part="2"]{--accent:var(--p2)}[data-part="3"]{--accent:var(--p3)}[data-part="4"]{--accent:var(--p4)}[data-part="5"]{--accent:var(--p5)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:72px}body{background:var(--bg);color:var(--ink);font-family:var(--f-read);margin:0}a{color:inherit}::selection{background:color-mix(in srgb, var(--accent) 25%, transparent)}.top{z-index:10;background:color-mix(in srgb, var(--bg) 88%, transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--panel-line);font-family:var(--f-ui);position:sticky;top:0}.top-in{justify-content:space-between;align-items:center;gap:16px;max-width:72rem;height:56px;margin:0 auto;padding:0 16px;display:flex}.brand{letter-spacing:.01em;white-space:nowrap;font-size:1.05rem;font-weight:600;text-decoration:none}.top-nav{align-items:center;gap:18px;font-size:.95rem;display:flex}.top-nav a{color:var(--muted);text-decoration:none}.top-nav a:hover{color:var(--ink)}.maplink{align-items:center;gap:6px;display:inline-flex}.maplink svg{fill:none;stroke:currentColor;stroke-width:1.6px;width:18px;height:18px}.maplink svg circle{fill:currentColor;stroke:none}.langs{border-left:1px solid var(--panel-line);gap:2px;padding-left:12px;display:inline-flex}.lang{font-family:var(--f-mono);border-radius:4px;padding:3px 5px;font-size:.75rem}.lang.on{color:var(--ink);background:var(--chip)}@media (max-width:560px){.top-nav>a:not(.maplink){display:none}.langs{padding-left:8px}.brand{font-size:.98rem}}.index{max-width:52rem;margin:0 auto;padding:56px 16px 32px}.hero h1{font-family:var(--f-ui);letter-spacing:-.01em;margin:0 0 14px;font-size:clamp(2.4rem,7vw,4rem);font-weight:600;line-height:1}.hero .sub{color:var(--muted);margin:0 0 22px;font-size:clamp(1.15rem,2.6vw,1.4rem);font-style:italic}.hero .lede{max-width:40rem;margin:0 0 18px;font-size:1.12rem;line-height:1.65}.hero .meta{font-family:var(--f-ui);color:var(--muted);margin:0 0 26px}.actions{flex-wrap:wrap;gap:10px;margin:0;display:flex}.btn{font-family:var(--f-ui);border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:10px 18px;font-weight:500;text-decoration:none}.btn.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}.btn:hover{border-color:var(--ink)}.toc{margin-top:64px}.toc-part{border-top:2px solid var(--accent);margin-bottom:44px;padding-top:14px}.toc-part h2{font-family:var(--f-ui);letter-spacing:.06em;text-transform:uppercase;color:var(--accent);margin:0 0 8px;font-size:.95rem;font-weight:600}.toc ol{margin:0;padding:0;list-style:none}.toc li a{border-bottom:1px solid var(--panel-line);padding:14px 0;text-decoration:none;display:block}.toc-title{margin-bottom:4px;font-size:1.22rem;font-weight:600;display:block}.toc-desc{color:var(--muted);font-size:.98rem;line-height:1.5;display:block}.toc li a:hover .toc-title{color:var(--accent)}.chapter{max-width:42rem;margin:0 auto;padding:48px 16px 24px}.kicker{font-family:var(--f-ui);letter-spacing:.06em;text-transform:uppercase;margin:0 0 12px;font-size:.85rem;font-weight:600}.kicker a{color:var(--accent);text-decoration:none}.ch-head{border-bottom:1px solid var(--panel-line);margin-bottom:30px;padding-bottom:22px}.ch-head h1{font-family:var(--f-read);letter-spacing:-.01em;margin:0 0 14px;font-size:clamp(2rem,6vw,2.9rem);font-weight:600;line-height:1.12}.ch-meta{font-family:var(--f-ui);color:var(--muted);flex-wrap:wrap;gap:6px 16px;margin:0;font-size:.92rem;display:flex}.ch-dates{font-family:var(--f-ui);color:var(--muted);border-top:1px solid var(--panel-line);margin:48px 0 0;padding-top:14px;font-size:.8rem;font-style:italic}.ch-note{font-family:var(--f-ui);color:var(--muted);margin:8px 0 0;font-size:.85rem}.prose{-webkit-hyphens:auto;hyphens:auto;overflow-wrap:break-word;font-size:1.125rem;line-height:1.72}.prose p{margin:0 0 1.15em}.prose h2{margin:2.2em 0 .7em;font-size:1.55rem;line-height:1.25;position:relative}.prose h3{margin:1.8em 0 .6em;font-size:1.22rem;line-height:1.3;position:relative}.prose h4{font-family:var(--f-ui);margin:1.6em 0 .5em;font-size:1.02rem;position:relative}.anchor{color:var(--line);opacity:0;font-weight:400;text-decoration:none;position:absolute;left:-1.1em}.prose :is(h2,h3,h4):hover .anchor{opacity:1}.prose a{color:var(--accent);text-underline-offset:2px}.prose blockquote{background:var(--panel);border:1px solid var(--panel-line);border-left:3px solid var(--accent);border-radius:0 8px 8px 0;margin:1.6em 0;padding:14px 18px;font-size:1.02rem}.prose blockquote p:last-child{margin-bottom:0}.prose code{font-family:var(--f-mono);background:var(--chip);border-radius:4px;padding:.08em .35em;font-size:.86em}.prose pre{font-family:var(--f-mono);background:var(--panel);border:1px solid var(--panel-line);border-radius:8px;padding:14px 16px;font-size:.86rem;line-height:1.55;overflow-x:auto}.prose pre code{background:0 0;padding:0}.prose ul,.prose ol{margin:0 0 1.15em;padding-left:1.3em}.prose li{margin:.3em 0}.prose hr{border:0;border-top:1px solid var(--panel-line);width:40%;margin:2.4em auto}.prose figure{margin:2em 0}.prose img{background:#fff;border-radius:6px;max-width:100%;height:auto;margin:0 auto;display:block}.prose figcaption{font-family:var(--f-ui);color:var(--muted);margin-top:10px;font-size:.88rem;line-height:1.45}.prose table{border-collapse:collapse;width:100%;font-family:var(--f-ui);margin:1.5em 0;font-size:.95rem;display:block;overflow-x:auto}.prose th,.prose td{border-bottom:1px solid var(--panel-line);text-align:left;vertical-align:top;padding:8px 10px}.pager{font-family:var(--f-ui);grid-template-columns:1fr 1fr;gap:12px;margin:56px 0 18px;display:grid}.pg{border:1px solid var(--panel-line);background:var(--panel);border-radius:10px;padding:14px 16px;text-decoration:none;display:block}.pg:hover{border-color:var(--accent)}.pg.next{text-align:right}.pg-lbl{color:var(--muted);margin-bottom:4px;font-size:.85rem;display:block}.pg-title{font-weight:600;line-height:1.3;display:block}@media (max-width:560px){.pager{grid-template-columns:1fr}.pg.next{text-align:left}}.alt-formats{font-family:var(--f-ui);color:var(--muted);margin:0;font-size:.85rem}.alt-formats a{color:var(--muted)}.foot{border-top:1px solid var(--panel-line);max-width:72rem;font-family:var(--f-ui);color:var(--muted);margin:48px auto 0;padding:24px 16px 40px;font-size:.9rem}.foot p{margin:0 0 8px}.foot-links{flex-wrap:wrap;gap:6px 18px;display:flex}.foot-links a{color:var(--muted)}.about .prose section+section h2{margin-top:1.8em}.about .prose section:first-child h2{margin-top:0}.about-actions{margin-top:40px}@media (max-width:560px){.top-nav{gap:12px}}