:root{
    --green:#26865f;
    --green-d:#176747;
    --green-l:#dcebdc;
    --lemon:#efd76b;
    --lemon-d:#d8ba42;
    --slate:#292d29;
    --slate-soft:#596158;
    --line:#c9c7b9;
    --bg:#f7f3e8;
    --bg-soft:#eee9da;
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;font-family:system-ui,sans-serif;color:var(--slate);
    background:var(--bg);line-height:1.65;
  }
  h1,h2,h3{font-family:Georgia,"Times New Roman",serif;color:var(--slate);line-height:1.15;margin:0;letter-spacing:-.015em} 
  a{color:inherit}
  .wrap{max-width:1080px;margin:0 auto;padding:0 24px}

  /* nav */
  nav{
    position:sticky;top:0;z-index:20;background:var(--bg);
    border-bottom:2px solid var(--slate);
  }
  nav .wrap{display:flex;align-items:center;gap:16px;height:64px}
  .brand{display:flex;align-items:center;gap:10px;font-family:Georgia,"Times New Roman",serif;font-weight:700;font-size:20px}
  .brand img{width:32px;height:32px;display:block}
  nav .spacer{flex:1}
  nav a{text-decoration:none;font-weight:500;color:var(--slate-soft);font-size:15px}
  nav a:hover{color:var(--green-d)}
  .btn{
    display:inline-block;background:var(--green);color:#fff;text-decoration:none;
    font-weight:650;padding:9px 19px;border:2px solid var(--slate);border-radius:3px;font-size:15px;
    box-shadow:3px 3px 0 var(--slate);transform:rotate(-.4deg);
  }
  .btn:hover{transform:rotate(.4deg) translate(1px,1px);box-shadow:2px 2px 0 var(--slate)}
  .btn.ghost{background:var(--lemon);color:var(--slate);box-shadow:3px 3px 0 var(--slate)}

  /* hero */
  .hero{position:relative;overflow:hidden}
  .hero::before{
    content:"";position:absolute;inset:0;z-index:-1;
    background:repeating-linear-gradient(0deg,transparent 0 31px,rgba(41,45,41,.045) 31px 32px);
    opacity:1;
  }
  .hero .wrap{
    display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
    padding:64px 24px 72px;
  }
  h1{font-size:clamp(34px,5vw,52px);font-weight:700;margin:20px 0 16px}
  h1 .hl{color:var(--green-d)}
  .lead{font-size:18px;color:var(--slate-soft);max-width:34ch}
  .cta{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}

  /* diagram */
  .diagram{width:100%;height:auto}
  .flow{stroke-dasharray:6 8;animation:flow 1.4s linear infinite}
  @keyframes flow{to{stroke-dashoffset:-28}}
  .pulse{animation:pulse 2.6s ease-in-out infinite}
  @keyframes pulse{0%,100%{opacity:.35}50%{opacity:1}}
  .node-label{font-family:"Space Grotesk";font-weight:600;font-size:13px;fill:var(--slate)}
  .chip{font-family:Inter;font-weight:600;font-size:10px}

  /* sections */
  section{padding:72px 0}
  .section-head{text-align:center;max-width:640px;margin:0 auto 48px}
  .section-head h2{font-size:clamp(26px,3.5vw,36px);font-weight:700}
  .section-head p{color:var(--slate-soft);font-size:17px;margin-top:12px}
  .alt{background:var(--bg-soft);border-top:2px solid var(--slate);border-bottom:2px solid var(--slate)}
  /* comparison table */
  .cmp-scroll{overflow-x:auto}
  .cmp{width:100%;border-collapse:collapse;min-width:620px}
  .cmp th,.cmp td{padding:14px 12px;text-align:center;font-size:15px;border-bottom:1px solid var(--line)}
  .cmp thead th{font-family:"Space Grotesk";font-weight:600;color:var(--slate-soft);font-size:14px}
  .cmp th.feat,.cmp td.feat{text-align:left;font-weight:500;color:var(--slate);min-width:220px}
  .cmp th.me,.cmp td.me{background:var(--green-l)}
  .cmp th.me{color:var(--green-d);border-top-left-radius:12px;border-top-right-radius:12px}
  .cmp th.me img{width:20px;height:20px;vertical-align:-4px;margin-right:6px}
  .cmp td.me{color:var(--green-d);font-weight:700;font-size:18px}
  .cmp tbody td{font-size:17px}
  .cmp .s{display:inline-block;width:22px;height:22px;line-height:22px;border-radius:50%;font-size:13px;font-weight:700;color:#fff}
  .cmp .s.y{background:#10b981}   /* yes  = green  */
  .cmp .s.p{background:#f59e0b}   /* partial = orange */
  .cmp .s.n{background:#ef4444}   /* no   = red    */
  /* download list */
  .dlist{list-style:none;max-width:560px;margin:0 auto;padding:0}
  .dlist li{display:flex;align-items:center;gap:12px;padding:6px 4px;border-bottom:1px solid var(--line)}
  .dlist li:last-child{border-bottom:0}
  .dlist .pl{font-weight:600;flex:0 0 70px}
  .dlist .ar{color:var(--slate-soft);flex:0 0 92px}
  .dlist .tg{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
    color:var(--green-d);font-weight:500;text-decoration:none}
  .dlist .tg:hover{text-decoration:underline}
  .cmp-legend{display:flex;gap:20px;justify-content:center;align-items:center;margin-top:20px;color:var(--slate-soft);font-size:14px;font-weight:600}
  .cmp-legend .s{width:18px;height:18px;line-height:18px;font-size:11px;vertical-align:-3px;margin-right:6px}

  /* sdlc / workflow */
  .states{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .state{position:relative;background:var(--bg);border:2px solid var(--slate);border-radius:4px;padding:22px 18px 22px 62px;border-top:5px solid var(--st);box-shadow:3px 3px 0 var(--line)}
  .state .n{position:absolute;left:18px;top:20px;width:30px;height:30px;border-radius:50%;background:var(--st);color:#fff;font-family:"Space Grotesk";font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:center}
  .state .k{font-family:"Space Grotesk";font-weight:700;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--st)}
  .state h3{font-size:17px;margin:8px 0 8px}
  .state p{margin:0 0 10px;color:var(--slate-soft);font-size:14px}
  .state .who{font-size:12px;color:var(--slate-soft);border-top:1px dashed var(--line);padding-top:10px}
  .state .who b{color:var(--slate)}
  .state .egs{list-style:none;margin:12px 0 0;padding:12px 0 0;border-top:1px dashed var(--line);display:flex;flex-direction:column;gap:7px}
  .state .egs li{display:flex;gap:8px;align-items:flex-start;font-size:13px;color:var(--slate-soft)}
  .state .egs img{width:22px;height:22px;border-radius:6px;background:#f1f5f9;flex:0 0 auto}
  @media(max-width:860px){.states{grid-template-columns:1fr}}

  /* humans+AI git-graph timeline */
  .gg-scroll{overflow-x:hidden}
  .gitgraph{width:100%;height:auto;max-width:1400px;margin:0 auto;display:block}
  .gg-title{font-family:"Space Grotesk";font-weight:700;font-size:19px}
  .gg-lbl{font-family:Inter;font-weight:600;font-size:15px;fill:var(--slate)}
  .gg-trunklbl{font-size:15px;font-weight:700}
  .gg-branch{stroke-dasharray:6 8;animation:flow 1.4s linear infinite}
  .gg-axis{font-family:"Space Grotesk";font-weight:600;font-size:12px;fill:var(--slate-soft)}
  .gg-legend{display:flex;flex-wrap:wrap;gap:14px 26px;justify-content:center;margin-top:28px;font-size:13px;font-weight:600;color:var(--slate-soft)}
  .gg-legend span{display:inline-flex;align-items:center;gap:7px}
  .gg-legend .sw{width:12px;height:12px;border-radius:50%}
  .gg-legend img.ava{width:20px;height:20px;border-radius:50%;background:#fff;border:1px solid var(--line)}
  /* chat-bubble commit events (rendered via SVG foreignObject) */
  .gg-bubble{display:flex;align-items:center;gap:8px;height:100%;font:600 13px/1.3 Inter;color:var(--slate)}
  .gg-bubble.r{flex-direction:row-reverse;justify-content:flex-end}
  .gg-bubble img{width:28px;height:28px;border-radius:50%;background:#fff;border:1px solid var(--line);flex:none;box-shadow:0 1px 3px rgba(0,0,0,.08)}
  .gg-bubble span{background:#fff;border:1px solid var(--line);border-radius:13px;padding:6px 11px;box-shadow:0 1px 4px rgba(15,23,42,.07);max-width:280px}
  .gg-bubble.r span{border-top-right-radius:3px}
  .gg-bubble:not(.r) span{border-top-left-radius:3px}

  /* quick start docs sections */
  .qs{max-width:760px;margin:0 auto}
  .qs .kicker{font-family:"Space Grotesk";font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--green-d)}
  .qs h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin:6px 0 10px}
  .qs>p{color:var(--slate-soft);font-size:16px;margin:0 0 24px}
  .qs h3{font-size:17px;margin:26px 0 8px}
  .qs .note{font-size:14px;color:var(--slate-soft);margin:8px 0 0}
  .qs code{background:var(--green-l);color:var(--green-d);padding:2px 7px;border-radius:6px;font-size:.92em}
  pre.code{
    background:#292d29;color:#f7f3e8;border:2px solid #111;border-radius:3px;padding:16px 18px;overflow-x:auto;
    font:500 14px/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;margin:10px 0 0;
  }
  pre.code .c{color:#64748b}
  pre.code .o{color:#6ee7b7}

  .cta-band{text-align:center}
  .cta-band .box{
    background:var(--green);border:2px solid var(--slate);
    border-radius:4px;padding:56px 32px;color:#fff;position:relative;overflow:hidden;box-shadow:5px 5px 0 var(--slate);
  }
  .cta-band .box::after{
    content:"";position:absolute;right:-40px;top:-40px;width:200px;height:200px;border-radius:50%;
    background:var(--lemon);opacity:.25;
  }
  .cta-band h2{color:#fff;font-size:clamp(26px,3.5vw,38px)}
  .cta-band p{color:rgba(255,255,255,.9);font-size:17px;margin:12px 0 26px}
  .cta-band .btn{background:#fff;color:var(--green-d)}
  .cta-band code{background:rgba(255,255,255,.18);padding:4px 10px;border-radius:6px;font-size:15px}

  footer{padding:40px 0;color:var(--slate-soft);font-size:14px}
  footer .wrap{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
  footer .spacer{flex:1}

  @media(max-width:860px){
    .hero .wrap{grid-template-columns:1fr;gap:36px;padding:48px 24px}
    nav a.hidem{display:none}
  }
  @media(prefers-reduced-motion:reduce){
    .flow,.pulse,.gg-branch{animation:none}
  }

  /* iframe embed pages: no scroll, transparent, section spacing preserved */
  body.embed{background:transparent}
  body.embed section{padding:64px 0}

  /* embedded section iframes on the landing page */
  .embed-frame{display:block;width:100%;border:0;overflow:hidden}

  /* JS-built section index sidebar */
  #_toc{position:fixed;top:50%;right:14px;transform:translateY(-50%) rotate(.5deg);
    display:flex;flex-direction:column;gap:6px;z-index:50;
    background:#fffdf5;padding:10px 12px;border:2px solid var(--slate);border-radius:3px;
    box-shadow:3px 3px 0 var(--slate);font-size:13px;max-width:170px}
  #_toc a{color:#475569;text-decoration:none;white-space:nowrap;
    overflow:hidden;text-overflow:ellipsis}
  #_toc a:hover{color:var(--green-d)}
  #_toc-toggle{display:none}
  @media(max-width:900px){
    #_toc-toggle{display:block;position:fixed;right:-2px;top:42%;z-index:52;
      padding:12px 8px;background:var(--lemon);color:var(--slate);
      border:2px solid var(--slate);border-radius:4px 0 0 4px;box-shadow:-3px 3px 0 var(--slate);
      font:700 13px Georgia,"Times New Roman",serif;writing-mode:vertical-rl;cursor:pointer}
    #_toc-toggle span{margin-top:5px}
    #_toc{display:flex;top:0;right:0;bottom:0;left:auto;transform:translateX(110%);
      width:min(78vw,280px);max-width:none;flex-direction:column;gap:12px;overflow-y:auto;
      padding:88px 22px 24px;border-width:0 0 0 2px;border-radius:0;box-shadow:-5px 0 0 rgba(41,45,41,.18);
      font-size:16px;transition:transform .18s ease}
    #_toc.open{transform:translateX(0)}
    #_toc a{white-space:normal;overflow:visible;border-bottom:1px dashed var(--line);padding-bottom:9px}
  }
  @media(max-width:900px) and (prefers-reduced-motion:reduce){#_toc{transition:none}}