/* ---------- Design tokens ---------- */
:root{
  --bg: #05070a;
  --bg-alt: #0a0e15;
  --surface: rgba(255,255,255,0.035);
  --surface-solid: #0d1219;
  --border: rgba(148,178,199,0.14);
  --border-accent: rgba(34,211,238,0.28);
  --text: #e7edf3;
  --text-dim: #93a3b3;
  --text-faint: #5c6b7a;
  --accent: #22d3ee;
  --accent-strong: #67e8f9;
  --accent-2: #39ff9d;
  --danger: #ff5c7a;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --radius: 14px;
  --container: 1160px;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1,h2,h3,h4{ margin:0 0 .5em; font-weight: 700; letter-spacing: -0.02em; }
p{ margin: 0 0 1em; color: var(--text-dim); }
a{ color: inherit; text-decoration: none; }
img,svg{ display:block; max-width:100%; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family: inherit; }

.container{
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* faint background grid, fixed */
.grid-overlay{
  position: fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(148,178,199,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,178,199,0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 90%);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding: 11px 20px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid transparent;
  cursor:pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn:active{ transform: translateY(1px); }
.btn-primary{
  background: linear-gradient(135deg, var(--accent), #0ea5b8);
  color: #04141a;
  box-shadow: 0 0 0 1px rgba(34,211,238,0.4), 0 8px 24px -8px rgba(34,211,238,0.55);
}
.btn-primary:hover{ box-shadow: 0 0 0 1px rgba(34,211,238,0.6), 0 10px 30px -6px rgba(34,211,238,0.7); }
.btn-ghost{ color: var(--text-dim); }
.btn-ghost:hover{ color: var(--text); }
.btn-outline{
  border-color: var(--border);
  color: var(--text);
  background: rgba(255,255,255,0.02);
}
.btn-outline:hover{ border-color: var(--border-accent); background: rgba(34,211,238,0.06); }
.btn-lg{ padding: 14px 26px; font-size: 0.98rem; }
.btn-block{ width:100%; }

/* ---------- Header ---------- */
.site-header{
  position: sticky; top:0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(5,7,10,0.72);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height: 72px;
  gap: 24px;
}
.brand{ display:flex; align-items:center; gap:10px; color: var(--text); }
.brand-mark{ color: var(--accent); display:flex; }
.brand-text{ font-family: var(--font-mono); font-weight:700; font-size: 1.04rem; letter-spacing: 0.01em; }
.brand-accent{ color: var(--accent); }
.footer-mark{ display:inline-flex; align-items:center; gap:8px; color: var(--accent); }

.main-nav{ display:flex; gap: 28px; }
.main-nav a{ color: var(--text-dim); font-size: 0.92rem; font-weight:500; transition: color .15s ease; }
.main-nav a:hover{ color: var(--text); }

.header-actions{ display:flex; align-items:center; gap: 10px; }

.nav-toggle{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width: 36px; height: 36px; background:none; border:none; cursor:pointer;
}
.nav-toggle span{ display:block; height:2px; width:100%; background: var(--text); border-radius:2px; }

/* ---------- Hero ---------- */
.hero{
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
}
#net-canvas{
  position:absolute; inset:0; width:100%; height:100%; z-index:0;
  opacity: 0.55;
}
.hero-inner{
  position: relative; z-index: 1;
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items:center;
}
.eyebrow-badge{
  display:inline-flex; align-items:center; gap:8px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-accent);
  background: rgba(34,211,238,0.06);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--accent-strong);
  margin-bottom: 22px;
}
.pulse-dot{
  width:7px; height:7px; border-radius:50%; background: var(--accent-2);
  box-shadow: 0 0 0 0 rgba(57,255,157,0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse{
  0%{ box-shadow: 0 0 0 0 rgba(57,255,157,0.55); }
  70%{ box-shadow: 0 0 0 8px rgba(57,255,157,0); }
  100%{ box-shadow: 0 0 0 0 rgba(57,255,157,0); }
}
.hero h1{
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  line-height: 1.08;
  color: #fff;
}
.hero-sub{
  font-size: 1.08rem;
  max-width: 540px;
  color: var(--text-dim);
}
.hero-cta{ display:flex; gap: 14px; margin: 28px 0 22px; flex-wrap: wrap; }
.hero-note{
  display:flex; align-items:center; gap:8px;
  font-size: 0.82rem; color: var(--text-faint);
}
.hero-note svg{ color: var(--accent); flex-shrink:0; }

/* hero visual panel */
.panel-window{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.015));
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.6), 0 0 0 1px rgba(34,211,238,0.06);
  overflow: hidden;
}
.panel-titlebar{
  display:flex; align-items:center; gap:8px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.panel-titlebar .dot{ width:9px; height:9px; border-radius:50%; }
.dot.red{ background:#ff5f56; } .dot.yellow{ background:#ffbd2e; } .dot.green{ background:#27c93f; }
.panel-title{
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
}
.panel-body{ padding: 18px 18px 6px; }
.graph-svg{ width:100%; height:auto; }
.graph-svg .node{ fill: var(--accent); filter: drop-shadow(0 0 6px rgba(34,211,238,0.7)); }
.graph-svg .node-core{ fill: #fff; filter: drop-shadow(0 0 10px rgba(255,255,255,0.8)); }
.graph-svg .node-alt{ fill: var(--accent-2); filter: drop-shadow(0 0 6px rgba(57,255,157,0.7)); }
.panel-readout{ padding: 14px 4px 18px; border-top: 1px solid var(--border); margin-top: 8px; }
.readout-row{
  display:flex; justify-content:space-between; align-items:center;
  padding: 7px 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.readout-row .rk{ color: var(--text-faint); letter-spacing:0.04em; }
.readout-row .rv{ color: var(--text-dim); }
.readout-row.status .rv.ok{ color: var(--accent-2); font-weight:600; }

/* ---------- Stats ---------- */
.stats{
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.015);
  position: relative; z-index:1;
}
.stats-grid{
  display:grid; grid-template-columns: repeat(4,1fr);
  padding: 36px 24px;
}
.stat{ text-align:center; padding: 0 12px; border-left: 1px solid var(--border); }
.stat:first-child{ border-left:none; }
.stat-num{
  display:block; font-family: var(--font-mono); font-weight:700;
  font-size: 2rem; color: var(--accent-strong);
}
.stat-label{ display:block; margin-top:6px; font-size: 0.82rem; color: var(--text-faint); }

/* ---------- Section shared ---------- */
section{ position: relative; z-index: 1; padding: 92px 0; }
.section-head{ max-width: 640px; margin: 0 auto 48px; text-align:center; }
.section-kicker{
  display:inline-block; font-family: var(--font-mono); font-size: 0.74rem;
  letter-spacing: 0.12em; color: var(--accent); margin-bottom: 12px;
}
.section-head h2{ font-size: clamp(1.6rem, 3vw, 2.2rem); color:#fff; }
.section-head p{ margin: 0 auto; }

/* ---------- Modules ---------- */
.module-grid{
  display:grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.module-card{
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: border-color .2s ease, transform .2s ease, background .2s ease;
}
.module-card:hover{
  border-color: var(--border-accent);
  transform: translateY(-3px);
  background: rgba(34,211,238,0.04);
}
.module-icon{
  width: 44px; height:44px; border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  background: rgba(34,211,238,0.08);
  color: var(--accent);
  margin-bottom: 16px;
}
.module-card h3{ font-size: 1.08rem; color:#fff; }
.module-card p{ font-size: 0.92rem; margin:0; }

/* ---------- API Suite ---------- */
.api-suite{ background: var(--bg-alt); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.api-grid{
  display:grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.api-card{
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-solid);
  display:flex; flex-direction:column;
  transition: border-color .2s ease, transform .2s ease;
}
.api-card:hover{ border-color: var(--border-accent); transform: translateY(-3px); }
.api-card-head{
  display:inline-flex; align-items:center; gap:8px;
  align-self:flex-start;
  padding: 5px 10px;
  border-radius: 6px;
  background: rgba(57,255,157,0.08);
  border: 1px solid rgba(57,255,157,0.22);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  margin-bottom: 18px;
}
.api-method{ color: var(--accent-2); font-weight:700; letter-spacing: 0.04em; }
.api-endpoint{ color: var(--text-dim); }
.api-card h3{ font-size: 1.05rem; color:#fff; }
.api-card p{ font-size: 0.9rem; }
.api-features{ margin-top: auto; display:flex; flex-direction:column; gap:10px; padding-top: 6px; border-top: 1px solid var(--border); }
.api-features li{
  position:relative; padding-left: 20px;
  font-size: 0.84rem; color: var(--text-dim);
}
.api-features li::before{
  content:""; position:absolute; left:0; top: 7px;
  width:6px; height:6px; border-radius:50%;
  background: var(--accent);
  box-shadow: 0 0 6px rgba(34,211,238,0.7);
}
.api-cta{
  display:flex; align-items:center; justify-content:center; gap:16px;
  margin-top: 40px; flex-wrap: wrap; text-align:center;
}
.api-cta-note{ font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-faint); }

/* ---------- Workflow ---------- */
.workflow{ background: var(--bg-alt); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.workflow-steps{
  display:grid; grid-template-columns: repeat(4,1fr); gap: 24px;
  counter-reset: step;
}
.wf-step{ position: relative; padding-top: 8px; }
.wf-step::before{
  content:""; position:absolute; top:0; left:0; width:100%; height:2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.wf-num{
  font-family: var(--font-mono); font-weight:700; font-size: 0.85rem;
  color: var(--accent); margin: 16px 0 10px;
}
.wf-step h3{ font-size: 1.02rem; color:#fff; }
.wf-step p{ font-size: 0.9rem; margin:0; }

/* ---------- Use cases ---------- */
.usecase-grid{
  display:grid; grid-template-columns: repeat(4,1fr); gap: 18px;
}
.usecase-card{
  padding: 24px; border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(255,255,255,0.03), transparent);
}
.usecase-card h3{ font-size: 1rem; color:#fff; }
.usecase-card p{ font-size: 0.88rem; margin:0; }

/* ---------- Security ---------- */
.security{ background: var(--bg-alt); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.security-grid{
  display:grid; grid-template-columns: repeat(3,1fr); gap: 20px;
}
.security-card{
  padding: 24px; border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}
.sec-icon{
  width: 30px; height:30px; border-radius:8px;
  display:flex; align-items:center; justify-content:center;
  background: rgba(57,255,157,0.1); color: var(--accent-2);
  font-weight:700; margin-bottom: 14px;
}
.security-card h3{ font-size: 1rem; color:#fff; }
.security-card p{ font-size: 0.88rem; margin:0; }

/* ---------- Demo / Contact ---------- */
.demo-inner{
  display:grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items:start;
}
.demo-copy h2{ color:#fff; }
.demo-list{ margin-top: 20px; display:flex; flex-direction:column; gap:12px; }
.demo-list li{
  padding-left: 24px; position:relative; font-size: 0.92rem; color: var(--text-dim);
}
.demo-list li::before{
  content:"›"; position:absolute; left:0; color: var(--accent); font-weight:700;
}
.demo-form{
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-solid);
}
.form-row{ margin-bottom: 16px; display:flex; flex-direction:column; gap:6px; }
.form-row label{ font-size: 0.82rem; color: var(--text-dim); font-weight:500; }
.form-row input, .form-row textarea{
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
  resize: none;
}
.form-row input:focus, .form-row textarea:focus{
  outline:none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34,211,238,0.14);
}
.form-note{ margin: 12px 0 0; font-size: 0.78rem; color: var(--text-faint); text-align:center; }

/* ---------- Footer ---------- */
.site-footer{ border-top: 1px solid var(--border); padding-top: 56px; position:relative; z-index:1; }
.footer-inner{
  display:grid; grid-template-columns: 1.2fr 2fr; gap: 40px;
  padding-bottom: 40px;
}
.footer-brand p{ margin-top: 10px; font-size: 0.88rem; max-width: 280px; }
.footer-cols{ display:grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.footer-col{ display:flex; flex-direction:column; gap: 10px; }
.footer-col h4{ font-size: 0.82rem; color: var(--text-faint); text-transform: uppercase; letter-spacing:0.06em; margin-bottom: 4px; }
.footer-col a, .footer-static{ font-size: 0.9rem; color: var(--text-dim); }
.footer-col a:hover{ color: var(--accent); }
.footer-bottom{
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  text-align:center;
}
.footer-bottom p{ margin:0; font-size: 0.8rem; color: var(--text-faint); }

/* ---------- Responsive ---------- */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-visual{ order:-1; }
  .stats-grid{ grid-template-columns: repeat(2,1fr); gap: 20px; }
  .stat{ border-left:none; }
  .module-grid{ grid-template-columns: repeat(2,1fr); }
  .api-grid{ grid-template-columns: repeat(2,1fr); }
  .workflow-steps{ grid-template-columns: repeat(2,1fr); }
  .usecase-grid{ grid-template-columns: repeat(2,1fr); }
  .security-grid{ grid-template-columns: repeat(2,1fr); }
  .demo-inner{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr; }
}

@media (max-width: 720px){
  .main-nav{
    position:absolute; top:72px; left:0; right:0;
    flex-direction:column; gap:0;
    background: rgba(5,7,10,0.98);
    border-bottom: 1px solid var(--border);
    max-height:0; overflow:hidden;
    transition: max-height .25s ease;
  }
  .main-nav.open{ max-height: 300px; }
  .main-nav a{ padding: 14px 24px; border-top: 1px solid var(--border); }
  .nav-toggle{ display:flex; }
  .header-actions .btn-ghost{ display:none; }
  .module-grid, .api-grid, .workflow-steps, .usecase-grid, .security-grid{ grid-template-columns: 1fr; }
  .stats-grid{ grid-template-columns: 1fr 1fr; }
  .footer-cols{ grid-template-columns: 1fr 1fr; }
}