@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Palette - Deep Graphite & Neon Cyan */
  --hue: 172;
  --c-bg: #090a0f;
  --c-surface: #12141d;
  --c-surface-hi: #1a1d27;
  --c-border: rgba(255, 255, 255, 0.08);
  --c-text-main: #e2e8f0;
  --c-text-muted: #94a3b8;
  --c-accent: hsl(var(--hue), 85%, 50%);
  --c-accent-glow: hsla(var(--hue), 90%, 50%, 0.3);
  --c-sec: hsl(260, 80%, 65%);
  --c-sec-glow: hsla(260, 80%, 65%, 0.25);
  --c-success: #10b981;

  /* Typography */
  --ff-sans: 'Inter', system-ui, sans-serif;
  --ff-mono: 'JetBrains Mono', monospace;

  /* Spacing Scale */
  --sp-xs: clamp(0.5rem, 1vw, 0.75rem);
  --sp-sm: clamp(0.75rem, 2vw, 1rem);
  --sp-md: clamp(1.5rem, 3vw, 2rem);
  --sp-lg: clamp(2.5rem, 5vw, 4rem);
  --sp-xl: clamp(4rem, 8vw, 8rem);

  /* Layout */
  --max-w: 1280px;
  --pad-h: clamp(1.25rem, 4vw, 3rem);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background-color: var(--c-bg);
  color: var(--c-text-main);
  font-family: var(--ff-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font: inherit; border: none; outline: none; }

/* Utility / Layout */
.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-h);
}

.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.grid { display: grid; gap: var(--sp-md); }

/* Typography */
h1, h2, h3, h4 { line-height: 1.1; font-weight: 700; letter-spacing: -0.02em; color: #fff; }
h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: var(--sp-sm); }
h3 { font-size: 1.25rem; }

.subhead {
  font-family: var(--ff-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-accent);
  font-weight: 500;
  margin-bottom: var(--sp-sm);
  display: block;
}

.lead {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--c-text-muted);
  max-width: 65ch;
}

/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  padding: var(--sp-sm) 0;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.brand { font-weight: 700; font-size: 1.25rem; letter-spacing: -0.03em; display: flex; align-items: center; gap: 0.5rem; }
.brand-dot { width: 10px; height: 10px; background: var(--c-accent); border-radius: 50%; box-shadow: 0 0 10px var(--c-accent); }
.nav-links { display: flex; gap: var(--sp-md); align-items: center; }
.nav-link { font-size: 0.95rem; color: var(--c-text-muted); font-weight: 500; }
.nav-link:hover { color: #fff; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-primary {
  background: var(--c-accent);
  color: #000;
  box-shadow: 0 0 20px var(--c-accent-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 30px var(--c-accent-glow); }
.btn-outline {
  border: 1px solid var(--c-border);
  color: #fff;
  background: transparent;
}
.btn-outline:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* Hero Section */
.hero { padding: var(--sp-xl) 0; position: relative; overflow: hidden; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--sp-lg);
  align-items: center;
}
.hero-content { position: relative; z-index: 2; }
.hero-actions { margin-top: var(--sp-md); display: flex; gap: var(--sp-sm); }
.hero-visual {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: var(--sp-sm);
  position: relative;
  box-shadow: 0 20px 50px -10px rgba(0,0,0,0.5);
}
.hero-visual::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%; width: 200%; height: 200%;
  background: radial-gradient(circle, var(--c-accent-glow) 0%, transparent 60%);
  opacity: 0.15;
  pointer-events: none;
}

/* Features Grid */
.features { padding: var(--sp-lg) 0; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--sp-md);
  margin-top: var(--sp-lg);
}
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: var(--sp-md);
  border-radius: var(--radius-md);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.card:hover { transform: translateY(-5px); border-color: var(--c-accent); }
.card-icon {
  width: 48px; height: 48px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--sp-sm);
  color: var(--c-accent);
}
.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--c-text-muted); font-size: 0.95rem; }

/* Stats */
.stats { padding: var(--sp-lg) 0; border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--sp-md); text-align: center; }
.stat-item h2 {
  font-family: var(--ff-mono);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  color: #fff;
  margin: 0;
}
.stat-item p { color: var(--c-text-muted); text-transform: uppercase; font-size: 0.8rem; letter-spacing: 0.05em; margin-top: 0.5rem; }

/* CTA Band */
.cta-band { padding: var(--sp-xl) 0; position: relative; }
.cta-inner {
  background: linear-gradient(135deg, var(--c-surface-hi) 0%, var(--c-surface) 100%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-inner::after {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-sec));
}

/* FAQ */
.faq { padding: var(--sp-lg) 0; }
.faq-list { max-width: 800px; margin: var(--sp-md) auto 0; }
.faq-item { border-bottom: 1px solid var(--c-border); padding: var(--sp-md) 0; }
.faq-q { font-weight: 600; font-size: 1.1rem; color: #fff; margin-bottom: 0.5rem; cursor: pointer; display: flex; justify-content: space-between; }
.faq-a { color: var(--c-text-muted); font-size: 0.95rem; line-height: 1.7; }

/* Footer */
.site-footer { background: var(--c-surface); padding: var(--sp-lg) 0 var(--sp-md); border-top: 1px solid var(--c-border); margin-top: var(--sp-lg); }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: var(--sp-md); margin-bottom: var(--sp-lg); }
.footer-col h4 { font-size: 0.9rem; text-transform: uppercase; color: var(--c-text-muted); margin-bottom: var(--sp-sm); letter-spacing: 0.05em; }
.footer-col ul li { margin-bottom: 0.5rem; }
.footer-col a:hover { color: var(--c-accent); }
.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding-top: var(--sp-md);
  display: flex;
  justify-content: space-between;
  color: var(--c-text-muted);
  font-size: 0.85rem;
}

/* Mobile */
@media (max-width: 768px) {
  .nav-links { display: none; } /* Simplified for demo */
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-actions { justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}
*{box-sizing:border-box}
img,svg,video{max-width:100%;height:auto}
html{-webkit-text-size-adjust:100%}
body{margin:0}