*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#09090b;--surface:#18181b;--border:#27272a;
  --text:#fafafa;--muted:#a1a1aa;
  --primary:#6366f1;--primary-light:#818cf8;
  --accent:#8b5cf6;
  --radius:12px;
}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
a{color:inherit;text-decoration:none}
.container{max-width:1120px;margin:0 auto;padding:0 24px}
.gradient-text{background:linear-gradient(135deg,var(--primary-light),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:8px;font-size:.875rem;font-weight:600;transition:all .2s;border:1px solid transparent;cursor:pointer}
.btn-sm{padding:7px 14px;font-size:.8rem}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-light);border-color:var(--primary-light);transform:translateY(-1px);box-shadow:0 8px 24px rgba(99,102,241,.25)}
.btn-ghost{border-color:var(--border);color:var(--muted)}
.btn-ghost:hover{border-color:var(--muted);color:var(--text)}
.btn-lg{padding:14px 32px;font-size:1rem;border-radius:10px}

/* ── Nav ── */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(9,9,11,.8);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1120px;margin:0 auto;padding:0 24px;height:60px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem}
.nav-links{display:flex;align-items:center;gap:28px;font-size:.875rem;color:var(--muted)}
.nav-links a:hover{color:var(--text)}

/* ── Hero ── */
.hero{text-align:center;padding:160px 24px 80px;max-width:900px;margin:0 auto;position:relative}
.hero-badge{display:inline-block;padding:6px 16px;border-radius:100px;font-size:.75rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--primary-light);background:rgba(99,102,241,.1);border:1px solid rgba(99,102,241,.2);margin-bottom:24px}
.hero h1{font-size:clamp(2.5rem,6vw,4rem);font-weight:800;line-height:1.1;letter-spacing:-.03em;margin-bottom:20px}
.hero-sub{font-size:1.125rem;color:var(--muted);max-width:600px;margin:0 auto 36px;line-height:1.7}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ── Canvas Mock ── */
.hero-visual{margin-top:64px}
.canvas-mock{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;max-width:720px;margin:0 auto;box-shadow:0 24px 64px rgba(0,0,0,.4)}
.canvas-toolbar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--border);background:rgba(24,24,27,.8)}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block}
.dot.red{background:#ef4444}.dot.yellow{background:#eab308}.dot.green{background:#22c55e}
.toolbar-title{margin-left:auto;font-family:'JetBrains Mono',monospace;font-size:.75rem;color:var(--muted)}
.canvas-body{padding:48px 32px;display:flex;align-items:center;justify-content:center;gap:4px;flex-wrap:wrap;position:relative;min-height:180px}
.node{display:flex;flex-direction:column;align-items:center;gap:6px;padding:16px 20px;border-radius:10px;border:1px solid var(--border);background:var(--bg);min-width:100px;transition:border-color .2s}
.node:hover{border-color:var(--primary)}
.node-icon{font-size:1.25rem}
.node-label{font-size:.75rem;font-weight:600;color:var(--muted)}
.node-trigger{border-color:rgba(234,179,8,.3)}
.node-agent{border-color:rgba(99,102,241,.3)}
.node-action{border-color:rgba(34,197,94,.3)}
.edge{width:60px;height:40px;flex-shrink:0}
.node-branch{position:absolute}
.node-observer{bottom:12px;left:28%}
.node-test{bottom:12px;right:28%}

/* ── Features ── */
.features{padding:120px 0}
.features h2{text-align:center;font-size:clamp(2rem,4vw,2.75rem);font-weight:800;letter-spacing:-.02em;margin-bottom:56px;line-height:1.2}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature-card{padding:28px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);transition:border-color .2s,transform .2s}
.feature-card:hover{border-color:rgba(99,102,241,.4);transform:translateY(-2px)}
.feature-icon{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:10px;background:rgba(99,102,241,.1);color:var(--primary-light);margin-bottom:16px}
.feature-card h3{font-size:1rem;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:.875rem;color:var(--muted);line-height:1.6}

/* ── How It Works ── */
.how-it-works{padding:120px 0;border-top:1px solid var(--border)}
.how-it-works h2{text-align:center;font-size:clamp(2rem,4vw,2.75rem);font-weight:800;letter-spacing:-.02em;margin-bottom:64px;line-height:1.2}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.step-num{font-family:'JetBrains Mono',monospace;font-size:.875rem;font-weight:600;color:var(--primary-light);margin-bottom:12px}
.step h3{font-size:1.25rem;font-weight:700;margin-bottom:8px}
.step p{font-size:.9rem;color:var(--muted);line-height:1.7}

/* ── Architecture ── */
.architecture{padding:120px 0;border-top:1px solid var(--border)}
.architecture h2{text-align:center;font-size:clamp(2rem,4vw,2.75rem);font-weight:800;letter-spacing:-.02em;margin-bottom:56px;line-height:1.2}
.arch-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.arch-card{padding:24px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface)}
.arch-card code{font-family:'JetBrains Mono',monospace;font-size:.8rem;color:var(--primary-light);background:rgba(99,102,241,.1);padding:3px 8px;border-radius:6px;display:inline-block;margin-bottom:12px}
.arch-card p{font-size:.85rem;color:var(--muted);line-height:1.6}

/* ── CTA ── */
.cta{padding:120px 0;text-align:center;border-top:1px solid var(--border)}
.cta h2{font-size:clamp(2rem,4vw,2.75rem);font-weight:800;letter-spacing:-.02em;margin-bottom:12px}
.cta p{color:var(--muted);margin-bottom:32px;font-size:1.05rem}

/* ── Footer ── */
.footer{padding:32px 0;border-top:1px solid var(--border)}
.footer-inner{display:flex;align-items:center;justify-content:space-between}
.footer-logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:.9rem}
.footer-copy{font-size:.8rem;color:var(--muted)}

/* ── Responsive ── */
@media(max-width:768px){
  .feature-grid,.steps,.arch-grid{grid-template-columns:1fr}
  .nav-links a:not(.btn){display:none}
  .canvas-body{flex-direction:column;gap:0}
  .edge{width:40px;height:30px;transform:rotate(90deg)}
  .node-branch{position:static}
  .hero h1{font-size:2.25rem}
}

/* ── Ambient glow ── */
.hero::before{content:'';position:absolute;top:-200px;left:50%;transform:translateX(-50%);width:600px;height:600px;background:radial-gradient(circle,rgba(99,102,241,.12) 0%,transparent 70%);pointer-events:none;z-index:-1}