:root{--iron-900:oklch(0.13 0.004 60);--iron-850:oklch(0.16 0.005 55);--iron-800:oklch(0.19 0.005 60);--iron-750:oklch(0.22 0.006 60);--iron-700:oklch(0.26 0.006 65);--iron-650:oklch(0.31 0.006 65);--iron-600:oklch(0.36 0.006 70);--iron-500:oklch(0.46 0.006 70);--iron-400:oklch(0.58 0.006 75);--iron-300:oklch(0.72 0.006 75);--iron-200:oklch(0.84 0.006 80);--iron-100:oklch(0.94 0.005 80);--hue:50;--glow-strength:1;--ember-lch:0.62 0.18 var(--hue);--forge-lch:0.72 0.21 var(--hue);--furnace-lch:0.8  0.2  var(--hue);--spark-lch:0.9  0.16 var(--hue);--ember:oklch(var(--ember-lch));--forge:oklch(var(--forge-lch));--furnace:oklch(var(--furnace-lch));--spark:oklch(var(--spark-lch));--shell-max:1440px;--topbar-h:56px;--sidebar-l:340px;--sidebar-r:280px;--grain:0.55;--serif:"Cormorant Garamond", "EB Garamond", Georgia, serif;--mono:"JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;--code-bg:oklch(0.16 0.005 60);--code-text:oklch(0.84 0.006 80)}*{box-sizing:border-box}svg.icon{width:14px;height:14px;flex-shrink:0}a{color:var(--furnace);text-decoration:underline;text-decoration-color:oklch(var(--forge-lch)/.45);text-decoration-thickness:1px;text-underline-offset:3px;transition:color .15s,text-decoration-color .15s,text-shadow .15s}a:hover{color:var(--spark);text-decoration-color:var(--furnace)}html,body{margin:0;padding:0;background:var(--iron-800);color:var(--iron-300);font-family:var(--mono);font-size:19.2px;line-height:1.55;font-feature-settings:"ss01","cv11";-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.iron-bg{position:fixed;inset:0;pointer-events:none;z-index:0;background:radial-gradient( ellipse 80% 60% at 50% -10%,oklch(.3 .05 var(--hue)/.35),transparent 60% ),radial-gradient( ellipse 60% 40% at 90% 110%,oklch(.32 .08 var(--hue)/.2),transparent 50% ),radial-gradient( ellipse 50% 30% at 5% 50%,oklch(.2 .01 var(--hue)/.5),transparent 60% ),linear-gradient( 180deg,var(--iron-850),var(--iron-800) 40%,var(--iron-900) 100% )}.iron-bg::before{content:"";position:absolute;inset:0;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='420' height='420'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.06  0 0 0 0 0.05  0 0 0 0 0.04  0 0 0 1.4 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.85'/></svg>");opacity:var(--grain);mix-blend-mode:overlay}.iron-bg::after{content:"";position:absolute;inset:0;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='turbulence' baseFrequency='0.08' numOctaves='3'/><feColorMatrix values='0 0 0 0 0.0  0 0 0 0 0.0  0 0 0 0 0.0  0 0 0 1 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.55'/></svg>");opacity:calc(var(--grain) * .35);mix-blend-mode:multiply}.shell{position:relative;z-index:1}.topbar{position:sticky;top:0;z-index:50;height:var(--topbar-h);display:flex;align-items:center;padding:0 24px;border-bottom:1px solid var(--iron-650);background:linear-gradient( 180deg,oklch(.16 .005 60/.85),oklch(.16 .005 60/.7) );backdrop-filter:blur(14px)saturate(140%);-webkit-backdrop-filter:blur(14px)saturate(140%);white-space:nowrap}.topbar::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:linear-gradient( 90deg,transparent,oklch(var(--forge-lch)/.4) 20%,oklch(var(--forge-lch)/.6) 50%,oklch(var(--forge-lch)/.3) 80%,transparent );opacity:calc(.6 * var(--glow-strength));filter:blur(.4px)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--iron-100);font-family:var(--serif);font-size:26.4px;letter-spacing:.005em;flex-shrink:0}.brand-mark{width:26px;height:26px;position:relative;display:flex;align-items:center;justify-content:center}.brand-mark svg{width:100%;height:100%}.brand small{font-family:var(--mono);font-size:12px;color:var(--iron-500);letter-spacing:.08em;text-transform:uppercase;margin-left:4px;border-left:1px solid var(--iron-600);padding-left:10px}.topbar-nav{display:flex;align-items:center;margin-left:36px;gap:2px}.topbar-nav a{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;text-decoration:none;color:var(--iron-400);font-family:var(--mono);font-size:15.6px;letter-spacing:.02em;border-radius:4px;transition:color .15s,background .15s}.topbar-nav a:hover{color:var(--iron-200);background:oklch(.3 .005 60/.5)}.topbar-nav a.active{color:var(--furnace);text-shadow:var(--accent-glow)}.topbar-nav a.active:hover{color:var(--furnace);background:oklch(var(--forge-lch)/.12);animation:accent-pulse 1.4s ease-in-out infinite}.topbar-spacer{flex:1}.topbar-tools{display:flex;align-items:center;gap:6px}.icon-btn{appearance:none;background:0 0;border:1px solid var(--iron-650);color:var(--iron-400);width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border-radius:5px;cursor:pointer;transition:all .15s}.icon-btn:hover{color:var(--iron-100);border-color:var(--iron-500);background:oklch(.3 .005 60/.5)}.icon-btn svg{width:14px;height:14px}.search-trigger{display:inline-flex;align-items:center;gap:10px;padding:0 8px 0 12px;height:32px;min-width:220px;border:1px solid var(--iron-650);border-radius:5px;background:oklch(.2 .005 60/.5);color:var(--iron-500);font-family:var(--mono);font-size:15.6px;cursor:pointer;transition:border-color .15s}.search-trigger:hover{border-color:var(--iron-500);color:var(--iron-300)}.search-trigger svg{width:13px;height:13px;opacity:.7}.search-trigger .kbd{margin-left:auto;font-size:12px;padding:2px 5px;border:1px solid var(--iron-600);border-radius:3px;background:var(--iron-800);color:var(--iron-400);letter-spacing:.05em}.btn-secondary{display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 18px;border:1px solid oklch(var(--forge-lch)/.18);background:0 0;color:var(--iron-200);font-family:var(--mono);font-size:14.4px;letter-spacing:.02em;border-radius:5px;text-decoration:none;transition:border-color .15s,background .15s,color .15s}.btn-secondary::before{content:"❯";color:var(--ember);text-shadow:var(--accent-glow);font-weight:600;font-size:.95em;transition:color .15s}.btn-secondary::after{content:"_";color:var(--ember);text-shadow:var(--accent-glow);font-weight:700;opacity:0}.btn-secondary:hover{border-color:oklch(var(--forge-lch)/.55);color:var(--iron-100);background:oklch(var(--forge-lch)/.05)}.btn-secondary:hover::before{color:var(--furnace)}.btn-secondary:hover::after{animation:terminal-caret 1s steps(2,jump-none)infinite}@keyframes terminal-caret{0%,49%{opacity:1}50%,100%{opacity:0}}.topbar-tools .btn-secondary{height:32px;padding:0 12px;font-size:13px;gap:6px}.sw-orange{color:oklch(.8 .2 50);text-shadow:0 0 8px oklch(.72 .21 50/.6),0 0 2px oklch(.72 .21 50/.4)}.sw-green{color:oklch(.8 .18 145);text-shadow:0 0 8px oklch(.72 .2 145/.6),0 0 2px oklch(.72 .2 145/.4)}.sw-cyan{color:oklch(.8 .14 210);text-shadow:0 0 8px oklch(.72 .16 210/.6),0 0 2px oklch(.72 .16 210/.4)}.sw-purple{color:oklch(.8 .16 310);text-shadow:0 0 8px oklch(.72 .19 310/.6),0 0 2px oklch(.72 .19 310/.4)}.cta-btn{display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:5px;border:1px solid oklch(var(--forge-lch)/.5);background:linear-gradient( 180deg,oklch(var(--forge-lch)/.18),oklch(var(--forge-lch)/.08) );color:var(--furnace);text-shadow:var(--accent-glow);font-family:var(--mono);font-size:15.6px;letter-spacing:.02em;cursor:pointer;text-decoration:none;text-transform:uppercase;transition:all .15s;box-shadow:0 0 oklch(var(--forge-lch)/.4),0 0 18px oklch(var(--forge-lch)/calc(.18 * var(--glow-strength)))inset}.cta-btn:hover{border-color:oklch(var(--forge-lch)/.9);color:var(--spark);text-shadow:var(--accent-glow);animation:accent-pulse 1.4s ease-in-out infinite;box-shadow:0 0 0 1px oklch(var(--forge-lch)/.4),0 0 22px oklch(var(--forge-lch)/calc(.35 * var(--glow-strength)))inset,0 0 24px oklch(var(--forge-lch)/calc(.3 * var(--glow-strength)))}.footer{position:relative;border-top:1px solid var(--iron-650);margin-top:80px;padding:56px 24px 32px;background:linear-gradient(180deg,transparent,oklch(.14 .004 60) 70%)}.footer::before{content:"";position:absolute;left:0;right:0;top:-1px;height:1px;background:linear-gradient( 90deg,transparent,oklch(var(--forge-lch)/.5),transparent );opacity:calc(.7 * var(--glow-strength))}.footer-inner{max-width:var(--shell-max);margin:0 auto}.footer-eyebrow{display:flex;align-items:baseline;gap:16px;margin-bottom:28px}.footer-eyebrow 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.2s;flex-shrink:0}.booklet-meta{display:flex;flex-direction:column;gap:4px;flex:1;min-width:0}.booklet-num{font-family:var(--mono);font-size:12px;color:var(--iron-500);letter-spacing:.12em}.booklet-title{font-family:var(--serif);font-weight:500;font-size:26.4px;line-height:1.15;color:var(--iron-100);margin:0;letter-spacing:.005em}.booklet-blurb{font-size:14.4px;color:var(--iron-400);line-height:1.5;margin:0}.chapter-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}.chapter-list li{display:flex;align-items:baseline;gap:8px;font-size:15.6px;color:var(--iron-400);font-family:var(--mono)}.chapter-list .ch-num{color:var(--iron-500);width:22px;flex-shrink:0}.chapter-list .ch-title{color:var(--iron-300)}.chapter-list a{display:flex;align-items:baseline;gap:8px;text-decoration:none;color:inherit;transition:color .15s}.chapter-list a:hover .ch-title{color:var(--furnace);text-shadow:var(--accent-glow);animation:accent-pulse 1.4s ease-in-out 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