/* =============================================================
   training.mof-eng.com — shared stylesheet
   ============================================================= */

/* ---------- Tokens ----------------------------------------- */
:root{
  --bg:#05070d;
  --bg-2:#0b1020;
  --fg:#e7ecf3;
  --fg-soft:#cfd6e2;
  --muted:#8b97a8;
  --muted-2:#6b7588;
  --brand:#3b82f6;
  --brand-2:#22d3ee;
  --accent:#a78bfa;
  --success:#34d399;
  --warning:#f59e0b;
  --danger:#f87171;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.18);
  --card:rgba(255,255,255,.03);
  --card-strong:rgba(255,255,255,.06);
  --radius-sm:8px;
  --radius:12px;
  --radius-lg:18px;
  --max:1180px;
  --max-narrow:880px;
  --shadow-brand:0 10px 30px rgba(59,130,246,.35);
  --shadow-soft:0 10px 30px rgba(0,0,0,.35);
  --font-sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}

/* ---------- Reset ------------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:var(--font-sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg,video{max-width:100%;display:block}
a{color:var(--brand-2);text-decoration:none}
a:hover{color:var(--fg)}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
table{border-collapse:collapse;width:100%}
hr{border:none;border-top:1px solid var(--line);margin:32px 0}
:focus-visible{outline:2px solid var(--brand-2);outline-offset:3px;border-radius:6px}

/* ---------- Page background -------------------------------- */
body{
  min-height:100vh;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(59,130,246,.18), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(167,139,250,.14), transparent 60%),
    radial-gradient(600px 400px at 50% 50%, rgba(34,211,238,.07), transparent 70%),
    var(--bg);
}
.grid-bg{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(ellipse at center,#000 0%,transparent 75%);
          mask-image:radial-gradient(ellipse at center,#000 0%,transparent 75%);
}

/* ---------- Layout ----------------------------------------- */
.container{position:relative;z-index:1;max-width:var(--max);margin:0 auto;padding:0 24px}
.container-narrow{position:relative;z-index:1;max-width:var(--max-narrow);margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-sm{padding:48px 0}
.section-lg{padding:96px 0}

/* ---------- Header / Nav ----------------------------------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(5,7,13,.7);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding:14px 24px}
.brand{display:flex;align-items:center;gap:12px;color:var(--fg);font-weight:700}
.brand:hover{color:var(--fg)}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),var(--accent));
  display:grid;place-items:center;color:#fff;font-weight:800;font-size:13px;
  box-shadow:var(--shadow-brand);
}
.brand-name{font-size:15px;letter-spacing:.2px}
.brand-name .sub{color:var(--muted);font-weight:500;display:none}
@media(min-width:720px){.brand-name .sub{display:inline}}

.nav{display:flex;align-items:center;gap:8px}
.nav a{color:var(--muted);font-size:14px;padding:8px 12px;border-radius:8px}
.nav a:hover,.nav a.active{color:var(--fg);background:var(--card)}
.nav .btn{margin-left:8px}
.nav-toggle{display:none;width:40px;height:40px;border-radius:8px;border:1px solid var(--line);align-items:center;justify-content:center}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--fg);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--fg)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

@media (max-width:760px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;
    background:rgba(5,7,13,.95);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;padding:8px;
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px;border-radius:10px}
  .nav-links .btn{margin:6px 0 0}
}

/* ---------- Buttons --------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border-radius:10px;font-weight:600;font-size:14px;line-height:1;
  text-decoration:none;border:1px solid transparent;
  transition:transform .15s,box-shadow .2s,background .2s,border-color .2s,color .2s;
  white-space:nowrap;
}
.btn:hover{color:#fff}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;box-shadow:var(--shadow-brand)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 14px 36px rgba(59,130,246,.5)}
.btn-ghost{background:var(--card);color:var(--fg);border-color:var(--line)}
.btn-ghost:hover{background:var(--card-strong);color:var(--fg)}
.btn-outline{background:transparent;color:var(--fg);border-color:var(--line-strong)}
.btn-outline:hover{background:var(--card);color:var(--fg)}
.btn-sm{padding:8px 12px;font-size:13px;border-radius:8px}
.btn-lg{padding:14px 22px;font-size:15px;border-radius:12px}
.btn-icon svg{width:16px;height:16px}

/* ---------- Typography ------------------------------------ */
.eyebrow{
  display:inline-block;font-size:11px;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--muted);
  margin-bottom:14px;
}
h1,h2,h3,h4{margin:0 0 16px;font-weight:800;letter-spacing:-.01em;line-height:1.15;color:var(--fg)}
h1{font-size:clamp(34px,5.4vw,60px);letter-spacing:-.02em;line-height:1.05}
h2{font-size:clamp(26px,3.6vw,40px)}
h3{font-size:20px}
h4{font-size:16px}
p{margin:0 0 16px}
.lead{font-size:clamp(16px,1.6vw,19px);color:var(--muted);line-height:1.65;max-width:720px}
.lead.center{margin:0 auto}
.muted{color:var(--muted)}
.center{text-align:center}
.accent-text{
  background:linear-gradient(90deg,var(--brand),var(--brand-2),var(--accent));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.title-gradient{
  background:linear-gradient(180deg,#fff 30%,#a8b3c7 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ---------- Badge / Pill ---------------------------------- */
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border:1px solid var(--line);border-radius:999px;
  background:var(--card);font-size:12px;color:var(--muted);
}
.badge .dot{
  width:8px;height:8px;border-radius:50%;background:var(--brand-2);
  box-shadow:0 0 14px var(--brand-2);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;background:var(--card);border:1px solid var(--line);font-size:11px;color:var(--muted)}
.pill.success{color:var(--success);border-color:rgba(52,211,153,.3)}
.pill.warning{color:var(--warning);border-color:rgba(245,158,11,.3)}
.pill.brand{color:var(--brand-2);border-color:rgba(34,211,238,.3)}

/* ---------- Cards ----------------------------------------- */
.card{
  padding:20px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--card);
}
.card.hover{transition:transform .15s,border-color .2s,background .2s}
.card.hover:hover{transform:translateY(-2px);border-color:rgba(59,130,246,.4);background:var(--card-strong)}
.card h3{margin-bottom:6px}
.card p{margin:0;color:var(--muted);font-size:14px}

/* Grid helpers */
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* Stats */
.stat{padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.stat .k{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.stat .v{font-size:22px;font-weight:700;margin-top:6px}
.stat .s{font-size:13px;color:var(--muted);margin-top:4px}

/* Section heading helper */
.section-head{margin-bottom:32px}
.section-head h2{margin-bottom:12px}
.section-head .lead{margin:0}

/* ---------- Hero ------------------------------------------ */
.hero{padding:64px 0 56px}
.hero h1{margin-top:14px;margin-bottom:18px}
.hero .lead{margin-bottom:24px}
.cta{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- Module cards ---------------------------------- */
.modules{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.mod{padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--card);transition:transform .15s,border-color .2s;display:flex;flex-direction:column;gap:6px}
.mod:hover{transform:translateY(-2px);border-color:rgba(59,130,246,.4)}
.mod .num{font-size:11px;color:var(--brand-2);letter-spacing:.18em}
.mod h3{margin:6px 0 6px;font-size:15px}
.mod p{margin:0;color:var(--muted);font-size:13px;line-height:1.55}

/* Detailed feature blocks */
.feature{
  display:grid;gap:24px;padding:28px;
  border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--card);
  grid-template-columns:1fr;
}
@media(min-width:880px){.feature{grid-template-columns:200px 1fr}}
.feature .ftag{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--brand-2)}
.feature h3{margin:6px 0 8px;font-size:22px}
.feature p{color:var(--muted)}
.feature ul{margin:6px 0 0;padding-left:20px;color:var(--muted)}
.feature ul li{margin-bottom:4px}
.feature-stack{display:flex;flex-direction:column;gap:16px}

/* ---------- Tier / Pricing -------------------------------- */
.tiers{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.tier{
  padding:24px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--card);
  display:flex;flex-direction:column;gap:14px;position:relative;
}
.tier.featured{border-color:rgba(59,130,246,.5);background:linear-gradient(180deg,rgba(59,130,246,.08),var(--card))}
.tier .tagline{font-size:13px;color:var(--muted);margin:-8px 0 6px}
.tier .price{font-size:36px;font-weight:800;line-height:1}
.tier .price .unit{font-size:14px;font-weight:500;color:var(--muted);margin-left:6px}
.tier ul{margin:8px 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:8px}
.tier ul li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--fg-soft)}
.tier ul li::before{content:"";flex:0 0 16px;height:16px;border-radius:50%;background:rgba(52,211,153,.15);background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2334d399'><path d='M16.7 6.3a1 1 0 010 1.4l-7 7a1 1 0 01-1.4 0l-4-4a1 1 0 011.4-1.4L9 12.6l6.3-6.3a1 1 0 011.4 0z'/></svg>");background-size:14px;background-position:center;background-repeat:no-repeat;margin-top:2px}
.tier ul li.x::before{background:rgba(248,113,113,.12);background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%23f87171'><path d='M6.3 6.3a1 1 0 011.4 0L10 8.6l2.3-2.3a1 1 0 111.4 1.4L11.4 10l2.3 2.3a1 1 0 11-1.4 1.4L10 11.4l-2.3 2.3a1 1 0 11-1.4-1.4L8.6 10 6.3 7.7a1 1 0 010-1.4z'/></svg>");color:var(--muted)}
.tier .badge-featured{position:absolute;top:-12px;right:18px;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-size:11px;font-weight:700;letter-spacing:.12em;padding:5px 10px;border-radius:999px;text-transform:uppercase}

/* Comparison table */
.compare{margin-top:32px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card)}
.compare table{font-size:14px}
.compare th,.compare td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.compare thead th{background:rgba(255,255,255,.04);font-weight:600;color:var(--muted);font-size:12px;letter-spacing:.05em;text-transform:uppercase}
.compare tbody tr:last-child td{border-bottom:none}
.compare td.check{color:var(--success)}
.compare td.x{color:var(--muted-2)}
.compare td.center,.compare th.center{text-align:center}

/* ---------- Timeline / Roadmap --------------------------- */
.timeline{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);overflow:hidden}
.phase{display:grid;grid-template-columns:120px 1fr auto;gap:18px;padding:16px 20px;border-top:1px solid var(--line);align-items:center}
.phase:first-child{border-top:none}
.phase .p{font-weight:700;font-size:14px}
.phase .d{color:var(--muted);font-size:14px}
.phase .s{font-size:11px;color:var(--muted);letter-spacing:.18em;text-transform:uppercase;justify-self:end}
.phase.active{background:linear-gradient(90deg,rgba(59,130,246,.10),transparent 60%)}
.phase.active .s{color:var(--brand-2)}
@media (max-width:640px){.phase{grid-template-columns:1fr;gap:6px}.phase .s{justify-self:start}}

/* ---------- FAQ ------------------------------------------ */
.faq{display:flex;flex-direction:column;gap:10px}
.faq details{padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);transition:border-color .2s}
.faq details[open]{border-color:rgba(59,130,246,.4)}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--muted);font-size:20px;line-height:1;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{margin:10px 0 0;color:var(--muted)}

/* ---------- Contact / forms ------------------------------ */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:13px;color:var(--muted);font-weight:600}
.field input,.field textarea,.field select{
  width:100%;padding:11px 14px;border-radius:10px;border:1px solid var(--line);
  background:var(--card);color:var(--fg);font:inherit;font-size:14px;
  transition:border-color .2s,background .2s;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--brand);background:var(--card-strong)}
.field textarea{resize:vertical;min-height:120px}
.contact-grid{display:grid;gap:24px;grid-template-columns:1fr}
@media(min-width:880px){.contact-grid{grid-template-columns:1fr 1fr}}
.contact-info{display:flex;flex-direction:column;gap:14px}
.contact-info .row{display:flex;gap:14px;align-items:flex-start}
.contact-info .row svg{width:18px;height:18px;color:var(--brand-2);margin-top:2px;flex:0 0 18px}

/* ---------- Callflow demo --------------------------------- */
.demo-shell{display:grid;gap:20px;grid-template-columns:1fr}
@media(min-width:1100px){.demo-shell{grid-template-columns:minmax(0,1fr) 400px}}

.demo-stage{
  border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--card);
  padding:18px;min-height:560px;display:flex;flex-direction:column;gap:14px;overflow:auto;
}
.demo-stage svg{width:100%;height:auto;flex:1;display:block;min-height:480px}

/* SVG primitives (new engine) */
.demo-stage svg .lane{stroke:rgba(255,255,255,.10);stroke-width:1;stroke-dasharray:3 5}
.demo-stage svg .node-head{cursor:pointer}
.demo-stage svg .node-head rect{fill:rgba(255,255,255,.03);stroke:var(--line);stroke-width:1;transition:fill .15s,stroke .15s}
.demo-stage svg .node-head:hover rect,
.demo-stage svg .node-head:focus rect{fill:rgba(34,211,238,.08);stroke:var(--brand-2);outline:none}
.demo-stage svg .node-head .name{fill:var(--fg);font-family:var(--font-sans);font-size:13px;font-weight:700}
.demo-stage svg .node-head .sub{fill:var(--muted);font-family:var(--font-sans);font-size:10px}
.demo-stage svg .msg{cursor:pointer}
.demo-stage svg .msg .line{stroke:rgba(255,255,255,.18);stroke-width:1.5;fill:none;transition:stroke .25s,opacity .25s}
.demo-stage svg .msg .label{fill:var(--muted);font-family:var(--font-sans);font-size:11px;transition:fill .25s,opacity .25s;pointer-events:none}
.demo-stage svg .msg .bubble circle{fill:rgba(255,255,255,.05);stroke:var(--line);stroke-width:1;transition:fill .25s,stroke .25s}
.demo-stage svg .msg .bubble text{fill:var(--muted);font-family:var(--font-sans);font-size:10px;font-weight:700;transition:fill .25s;pointer-events:none}
.demo-stage svg .msg[data-visited] .line{stroke:rgba(59,130,246,.55)}
.demo-stage svg .msg[data-visited] .label{fill:var(--fg-soft)}
.demo-stage svg .msg[data-visited] .bubble circle{fill:rgba(59,130,246,.18);stroke:rgba(59,130,246,.45)}
.demo-stage svg .msg[data-visited] .bubble text{fill:var(--brand-2)}
.demo-stage svg .msg[data-current] .line{stroke:var(--brand-2);stroke-width:2.5}
.demo-stage svg .msg[data-current] .label{fill:var(--fg);font-weight:600}
.demo-stage svg .msg[data-current] .bubble circle{fill:rgba(34,211,238,.28);stroke:var(--brand-2)}
.demo-stage svg .msg[data-current] .bubble text{fill:#fff}
.demo-stage svg .msg:not([data-visited]):not([data-current]) .line,
.demo-stage svg .msg:not([data-visited]):not([data-current]) .label{opacity:.4}
.demo-stage svg .msg:hover .line{stroke:var(--accent)}
.demo-stage svg .msg:hover .label{fill:var(--fg)}
/* arrowhead polygons */
.demo-stage svg polygon[data-arrow="dim"]    {fill:rgba(255,255,255,.18)}
.demo-stage svg polygon[data-arrow="done"]   {fill:rgba(59,130,246,.55)}
.demo-stage svg polygon[data-arrow="current"]{fill:var(--brand-2)}

.demo-controls{
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  padding:12px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);
}
.demo-controls .group{display:flex;gap:6px}
.demo-controls button{padding:8px 12px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--fg);font-size:13px;font-weight:600;transition:background .15s,border-color .15s}
.demo-controls button:hover:not(:disabled){background:var(--card-strong);border-color:var(--line-strong)}
.demo-controls button.primary{background:linear-gradient(135deg,var(--brand),var(--accent));border-color:transparent;color:#fff}
.demo-controls button:disabled{opacity:.4;cursor:not-allowed}
.demo-controls .speed{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);margin-left:auto}
.demo-controls .speed select{padding:6px 10px;border-radius:8px;background:var(--card);color:var(--fg);border:1px solid var(--line);font:inherit;font-size:12px}
.demo-controls .step-counter{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;padding:0 8px}

.demo-panel{
  border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--card);
  padding:20px;display:flex;flex-direction:column;gap:14px;min-height:560px;
}
.demo-panel .empty{color:var(--muted);font-size:14px;text-align:center;margin:auto 0;padding:40px 16px}
.demo-panel .head{display:flex;flex-direction:column;gap:8px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.demo-panel .head .row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.demo-panel .head h3{margin:0;font-size:17px}
.demo-panel .head .route{font-size:13px;color:var(--muted);font-family:var(--font-mono)}
.demo-panel .body p{color:var(--muted);font-size:14px;margin:0 0 14px}
.demo-panel h4{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin:14px 0 8px;font-weight:700}
.demo-panel .params{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.demo-panel .params li{
  padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.02);
  display:flex;flex-direction:column;gap:4px;
}
.demo-panel .params .row{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}
.demo-panel .params .pn{font-family:var(--font-mono);font-size:13px;color:var(--fg);font-weight:600}
.demo-panel .params .pp{font-size:10px;letter-spacing:.12em;text-transform:uppercase;padding:2px 6px;border-radius:4px;border:1px solid var(--line);color:var(--muted)}
.demo-panel .params .pp.pres-mandatory{color:#fff;background:rgba(59,130,246,.25);border-color:rgba(59,130,246,.45)}
.demo-panel .params .pp.pres-conditional{color:var(--brand-2);background:rgba(34,211,238,.12);border-color:rgba(34,211,238,.4)}
.demo-panel .params .pp.pres-optional{color:var(--muted)}
.demo-panel .params .pv{font-family:var(--font-mono);font-size:12px;color:var(--fg-soft);word-break:break-all}
.demo-panel .params .pd{font-size:12px;color:var(--muted)}

.demo-legend{display:flex;flex-wrap:wrap;gap:14px;font-size:12px;color:var(--muted);margin-top:10px}
.demo-legend .leg{display:inline-flex;align-items:center;gap:6px}
.demo-legend .swatch{width:22px;height:2px;background:var(--brand-2);border-radius:2px}
.demo-legend .swatch.dim{background:rgba(255,255,255,.18)}
.demo-legend .swatch.done{background:rgba(59,130,246,.55)}

/* ---------- Footer ---------------------------------------- */
.site-footer{position:relative;z-index:1;border-top:1px solid var(--line);background:rgba(5,7,13,.6);margin-top:64px}
.site-footer .container{padding:40px 24px}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr;align-items:flex-start}
@media(min-width:720px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.footer-grid h4{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin-bottom:14px;font-weight:700}
.footer-grid ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.footer-grid ul li a{color:var(--fg-soft);font-size:14px}
.footer-grid ul li a:hover{color:var(--fg)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;border-top:1px solid var(--line);padding-top:20px;margin-top:32px;color:var(--muted);font-size:13px}

/* ---------- Utilities ------------------------------------ */
.mt-0{margin-top:0}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}.mt-5{margin-top:48px}.mt-6{margin-top:64px}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}.mb-5{margin-bottom:48px}
.flex{display:flex}.flex-wrap{flex-wrap:wrap}.gap-2{gap:16px}.gap-3{gap:24px}
.text-center{text-align:center}
.hide{display:none !important}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- Print ---------------------------------------- */
@media print{
  body{background:#fff;color:#000}
  .grid-bg,.site-header,.site-footer,.cta,.demo-controls,.demo-bar,.config-drawer,.node-filter{display:none}
  a{color:#000;text-decoration:underline}
  .card,.tier,.timeline,.feature{border-color:#ccc;background:#fff;color:#000}
}

/* ---------- Reduced motion ------------------------------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* ---------- Demo: header chips, bar, config, filter ------ */
.meta-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

.demo-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  padding:12px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);
}
.demo-bar-field{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);flex:1;min-width:240px}
.demo-bar-field select{
  flex:1;min-width:200px;padding:8px 10px;border-radius:8px;background:var(--card-strong);
  color:var(--fg);border:1px solid var(--line);font:inherit;font-size:13px;font-weight:600;
}
.demo-bar-group{display:flex;gap:6px;margin-left:auto;flex-wrap:wrap}

.config-drawer{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);overflow:hidden}
.config-drawer summary{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding:14px 18px;cursor:pointer;list-style:none;font-weight:600;color:var(--fg);
  background:linear-gradient(180deg,rgba(255,255,255,.02),transparent);
}
.config-drawer summary::-webkit-details-marker{display:none}
.config-drawer summary::before{
  content:"▸";display:inline-block;margin-right:6px;color:var(--brand-2);
  transition:transform .15s;
}
.config-drawer[open] summary::before{transform:rotate(90deg)}
.config-drawer summary:hover{background:var(--card-strong)}
.config-grid{
  display:grid;gap:14px;padding:6px 18px 14px;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
}
.cfg-card{
  border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:0;
  background:rgba(255,255,255,.02);display:flex;flex-direction:column;gap:8px;
}
.cfg-card legend{
  padding:0 6px;font-size:11px;text-transform:uppercase;letter-spacing:.16em;
  color:var(--brand-2);font-weight:700;
}
.cfg-card label{display:flex;flex-direction:column;gap:4px;font-size:11px;color:var(--muted);text-transform:none;letter-spacing:0;font-weight:500}
.cfg-card input,.cfg-card select{
  padding:7px 10px;border-radius:7px;background:var(--card-strong);color:var(--fg);
  border:1px solid var(--line);font:inherit;font-size:13px;font-family:var(--font-mono);
}
.cfg-card input:focus,.cfg-card select:focus{outline:none;border-color:var(--brand-2);background:rgba(34,211,238,.05)}
.config-actions{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:12px 18px 16px;border-top:1px solid var(--line);background:rgba(255,255,255,.02);
}
.config-actions code{font-family:var(--font-mono);font-size:11px;color:var(--brand-2);background:rgba(34,211,238,.08);padding:1px 5px;border-radius:4px}

.node-filter{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.node-filter button{
  padding:6px 12px;border-radius:999px;border:1px solid var(--line);
  background:var(--card);color:var(--muted);font-size:12px;font-weight:600;
  font-family:var(--font-sans);cursor:pointer;transition:background .15s,border-color .15s,color .15s;
}
.node-filter button:hover{color:var(--fg);border-color:var(--line-strong)}
.node-filter button.active{background:rgba(59,130,246,.18);color:#fff;border-color:rgba(59,130,246,.55)}