:root{--bg: #0a0a0a;--bg-elev: #111;--fg: #f5f5f5;--fg-dim: #8a8a8a;--fg-faint: #555;--line: #1f1f1f;--line-strong: #2e2e2e;--accent: #ffffff;--mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:var(--mono);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}body{min-height:100vh;display:flex;flex-direction:column}a{color:var(--fg);text-decoration:none;transition:color .12s ease,border-color .12s ease,background .12s ease}a:hover{color:var(--accent)}::selection{background:var(--fg);color:var(--bg)}.shell{width:100%;max-width:880px;margin:0 auto;padding:2rem 1.5rem;flex:1;display:flex;flex-direction:column}.shell-wide{max-width:1080px}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:6rem}.brand{display:inline-flex;align-items:center;gap:.7rem}.brand img{height:28px;width:auto;display:block}.brand-mark{font-size:.8rem;letter-spacing:.18em;text-transform:uppercase;color:var(--fg-dim)}.nav{display:flex;gap:1.5rem;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-dim)}.nav a:hover{color:var(--fg)}.hero{flex:1;display:flex;flex-direction:column;justify-content:center;padding:2rem 0 4rem}.eyebrow{font-size:.75rem;letter-spacing:.22em;text-transform:uppercase;color:var(--fg-dim);margin:0 0 1.5rem}h1.claim{font-family:var(--mono);font-weight:500;font-size:clamp(1.6rem,3.4vw,2.4rem);line-height:1.25;letter-spacing:-.01em;margin:0 0 1.75rem;max-width:32ch}.sub{color:var(--fg-dim);font-size:.95rem;line-height:1.65;margin:0 0 3.5rem;max-width:56ch}.sub b{color:var(--fg);font-weight:500}.paths{display:grid;grid-template-columns:1fr 1fr;gap:1rem;max-width:640px}.path{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;padding:1.4rem 1.5rem;border:1px solid var(--line-strong);background:var(--bg-elev);font-size:1.05rem;letter-spacing:.02em;min-height:64px}.path:hover{border-color:var(--accent);background:#161616}.path .arrow{color:var(--fg-dim);transition:color .12s ease,transform .12s ease}.path:hover .arrow{color:var(--accent);transform:translate(3px)}@media(max-width:560px){.paths{grid-template-columns:1fr}}.footer{border-top:1px solid var(--line);padding:1.5rem 0 0;margin-top:3rem;color:var(--fg-faint);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}.footer a{color:var(--fg-faint)}.footer a:hover{color:var(--fg-dim)}.stub h1{font-weight:500;font-size:clamp(1.4rem,3vw,2rem);margin:0 0 1rem}.stub .lede{color:var(--fg-dim);max-width:56ch;margin:0 0 2.5rem}.stub h2{font-size:.75rem;letter-spacing:.22em;text-transform:uppercase;color:var(--fg-dim);margin:2.5rem 0 1rem;font-weight:500}.stub ul{padding-left:1.2rem;margin:0 0 2rem}.stub li{margin-bottom:.6rem;color:var(--fg)}.stub li span{color:var(--fg-dim)}.stub .back{display:inline-flex;gap:.5rem;color:var(--fg-dim);font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;margin-top:2rem}.stub .back:hover{color:var(--fg)}.ai-shell{max-width:1100px}.ai-hero{padding:1rem 0 4rem;border-bottom:1px solid var(--line);margin-bottom:3rem}.ai-hero h1{font-family:var(--mono);font-weight:500;font-size:clamp(1.8rem,3.6vw,2.6rem);line-height:1.2;letter-spacing:-.01em;margin:0 0 1.5rem;max-width:22ch}.ai-hero .lede{color:var(--fg-dim);font-size:1rem;line-height:1.7;max-width:62ch;margin:0}.starter-kit-block{margin:0 0 3.5rem;padding:1.5rem 1.75rem;border:1px solid var(--line-strong);background:var(--bg-elev);display:flex;flex-direction:column;gap:1rem}.starter-kit-block .kit-label{font-size:.7rem;letter-spacing:.22em;text-transform:uppercase;color:var(--fg-faint);font-weight:500}.starter-kit-block p{margin:0;color:var(--fg);line-height:1.6;max-width:60ch}.starter-kit-block p .meta{color:var(--fg-dim);display:block;margin-top:.4rem;font-size:.85rem}.kit-form{display:flex;flex-wrap:wrap;gap:.5rem;margin:.25rem 0 0;position:relative}.kit-form input[type=email]{flex:1 1 240px;padding:.7rem 1rem;background:var(--bg);border:1px solid var(--line-strong);color:var(--fg);font:inherit;font-size:.95rem;outline:none;transition:border-color .12s ease}.kit-form input[type=email]:focus{border-color:var(--accent)}.kit-form input[type=email]::placeholder{color:var(--fg-faint)}.kit-form input[name=hp]{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}.kit-form button{padding:.7rem 1.2rem;background:var(--bg);border:1px solid var(--line-strong);color:var(--fg);font:inherit;font-size:.95rem;cursor:pointer;white-space:nowrap;transition:border-color .12s ease,background .12s ease}.kit-form button:hover:not(:disabled){border-color:var(--accent);background:#161616}.kit-form button:disabled{opacity:.55;cursor:wait}.kit-error{flex-basis:100%;margin:.25rem 0 0;font-size:.85rem;color:#ff8a8a}.kit-privacy{font-size:.78rem;color:var(--fg-faint);margin:0;max-width:56ch}.kit-download{display:inline-flex;align-items:center;gap:.6rem;padding:.7rem 1.2rem;border:1px solid var(--line-strong);background:var(--bg);color:var(--fg);font-size:.95rem;white-space:nowrap;align-self:flex-start;transition:border-color .12s ease,background .12s ease}.kit-download:hover{border-color:var(--accent);background:#161616}.kit-download .arrow{color:var(--fg-dim);font-size:1.1rem}.kit-thanks{font-size:.85rem;color:var(--fg-dim);margin:.5rem 0 0}.kit-download-ready[hidden],.kit-form[hidden]{display:none}@media(max-width:600px){.kit-form input[type=email],.kit-form button{flex:1 1 100%}}.ai-grid{display:grid;grid-template-columns:200px 1fr;gap:4rem;align-items:start}.ai-nav{position:sticky;top:2rem;font-size:.8rem;display:flex;flex-direction:column;gap:.6rem}.ai-nav .nav-label{font-size:.7rem;letter-spacing:.22em;text-transform:uppercase;color:var(--fg-faint);margin-bottom:.5rem;font-weight:500}.ai-nav a{color:var(--fg-dim);display:block;border-left:1px solid var(--line);padding:.25rem 0 .25rem .9rem;transition:color .12s ease,border-color .12s ease;line-height:1.4}.ai-nav a:hover{color:var(--fg);border-left-color:var(--fg-dim)}.ai-nav a.active{color:var(--fg);border-left-color:var(--accent)}.ai-nav hr{border:0;border-top:1px solid var(--line);margin:.8rem 0}.ai-content{min-width:0}.ai-content section{margin-bottom:5rem;scroll-margin-top:2rem}.ai-content section+section{border-top:1px solid var(--line);padding-top:4rem}.ai-content .tldr{padding:.7rem 0 .7rem 1.1rem;border-left:2px solid var(--accent);margin:0 0 2rem;max-width:60ch;font-size:.95rem;line-height:1.65;color:var(--fg)}.ai-content .tldr-label{display:block;font-size:.65rem;letter-spacing:.22em;text-transform:uppercase;color:var(--fg-faint);margin-bottom:.35rem;font-weight:500}.ai-content .pull{font-size:1.15rem;line-height:1.5;color:var(--fg);font-weight:500;padding:1.2rem 0;margin:2rem 0;border-top:1px solid var(--line-strong);border-bottom:1px solid var(--line-strong);max-width:56ch;font-style:italic}.ai-content .rung{margin-top:2.5rem;padding-top:2rem;border-top:1px dashed var(--line)}.ai-content .rung:first-of-type{margin-top:1.5rem;padding-top:0;border-top:0}.ai-content .rung-label{font-size:.7rem;letter-spacing:.22em;text-transform:uppercase;color:var(--fg-faint);margin:0 0 .4rem;font-weight:500}.ai-content h2{font-family:var(--mono);font-weight:500;font-size:1.5rem;letter-spacing:-.01em;margin:0 0 1.5rem;color:var(--fg)}.ai-content h2 .num{color:var(--fg-faint);margin-right:.6rem;font-weight:400}.ai-content h3{font-family:var(--mono);font-weight:500;font-size:1.05rem;margin:2.5rem 0 .8rem;color:var(--fg);scroll-margin-top:2rem}.ai-content p{color:var(--fg);line-height:1.75;margin:0 0 1.2rem;max-width:62ch}.ai-content p.dim{color:var(--fg-dim)}.ai-content ul,.ai-content ol{padding-left:1.4rem;margin:0 0 1.4rem;max-width:62ch}.ai-content li{margin-bottom:.55rem;line-height:1.7;color:var(--fg)}.ai-content li b,.ai-content p b,.ai-content strong{color:var(--fg);font-weight:500}.ai-content blockquote{margin:1.5rem 0 1.8rem;padding:1rem 1.25rem;border-left:2px solid var(--line-strong);background:var(--bg-elev);color:var(--fg);font-style:italic;max-width:62ch}.ai-content blockquote em{font-style:normal;color:var(--fg-dim)}.ai-content .callout{border:1px solid var(--line-strong);background:var(--bg-elev);padding:1.1rem 1.25rem;margin:1.5rem 0;font-size:.92rem;color:var(--fg-dim);max-width:62ch}.ai-content .callout b{color:var(--fg)}.ai-content a.inline{color:var(--fg);border-bottom:1px solid var(--line-strong)}.ai-content a.inline:hover{border-bottom-color:var(--accent)}.contact-block{border-top:1px solid var(--line);padding-top:2rem;margin-top:4rem}.contact-block .email{display:inline-block;margin-top:.5rem;padding:.6rem 1rem;border:1px solid var(--line-strong);background:var(--bg-elev);color:var(--fg);font-size:1rem}.contact-block .email:hover{border-color:var(--accent)}@media(max-width:900px){.ai-grid{grid-template-columns:1fr;gap:2rem}.ai-nav{position:static;flex-direction:row;flex-wrap:wrap;gap:.5rem 1rem;padding-bottom:1.5rem;border-bottom:1px solid var(--line)}.ai-nav .nav-label{width:100%;margin-bottom:.3rem}.ai-nav hr{display:none}.ai-nav a{border-left:0;padding-left:0;padding:.2rem 0;font-size:.85rem}.ai-nav a.active{border-left:0}.ai-content section{margin-bottom:3.5rem}}@media(max-width:560px){.topbar{margin-bottom:3rem}.hero{padding-top:0}}