:root {
  --bg: #0A0A0A;
  --fg: #F5F5F0;
  --accent: #BFFF00;
  --muted: #888880;
  --card: #141414;
  --border: #222222;
  --font-head: 'Spectral', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(8px);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
}
.nav-tag {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 40px 80px;
}
.hero-inner { max-width: 1200px; margin: 0 auto; width: 100%; }
.hero-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}
.hero-headline {
  font-family: var(--font-head);
  font-size: clamp(64px, 10vw, 120px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
  color: var(--fg);
}
.hero-sub {
  font-size: 18px;
  color: var(--muted);
  max-width: 480px;
  line-height: 1.6;
  margin-bottom: 56px;
  font-weight: 300;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}
.stat-label { font-size: 12px; color: var(--muted); }
.stat-sep { width: 1px; height: 40px; background: var(--border); }

/* Sections */
.section-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
}
.section-headline {
  font-family: var(--font-head);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

/* What */
.what { padding: 120px 40px; background: var(--bg); }
.what-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  max-width: 1200px;
  margin: 0 auto;
}
.what-card {
  background: var(--bg);
  padding: 40px 32px;
}
.what-icon {
  color: var(--accent);
  margin-bottom: 20px;
}
.what-card h3 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}
.what-card p { font-size: 14px; color: var(--muted); line-height: 1.7; font-weight: 300; }

/* How */
.how { padding: 120px 40px; background: var(--card); border-top: 1px solid var(--border); }
.how-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.how-desc { font-size: 16px; color: var(--muted); line-height: 1.7; margin-bottom: 20px; font-weight: 300; }
.how-steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }
.step-num {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  min-width: 28px;
  padding-top: 4px;
}
.step h4 { font-size: 16px; font-weight: 500; margin-bottom: 4px; }
.step p { font-size: 13px; color: var(--muted); }

/* Difference */
.difference { padding: 120px 40px; background: var(--bg); }
.diff-headline {
  font-family: var(--font-head);
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.diff-sub { font-size: 18px; color: var(--muted); margin-bottom: 64px; font-weight: 300; }
.diff-table {
  max-width: 1000px;
  margin: 0 auto;
  border: 1px solid var(--border);
}
.diff-row {
  display: grid;
  grid-template-columns: 200px repeat(3, 1fr);
  border-bottom: 1px solid var(--border);
}
.diff-row:last-child { border-bottom: none; }
.diff-row span {
  padding: 16px 20px;
  font-size: 13px;
  border-right: 1px solid var(--border);
}
.diff-row span:last-child { border-right: none; }
.diff-header span { font-weight: 600; font-size: 12px; letter-spacing: 0.05em; color: var(--muted); text-transform: uppercase; }
.diff-row span { color: var(--muted); }
.no { color: #555 !important; }
.yes { color: var(--fg) !important; font-weight: 500; }

/* Closing */
.closing { padding: 120px 40px; background: var(--card); border-top: 1px solid var(--border); }
.closing-inner { max-width: 1200px; margin: 0 auto; }
.closing-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}
.closing-headline {
  font-family: var(--font-head);
  font-size: clamp(40px, 5vw, 72px);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.closing-sub { font-size: 18px; color: var(--muted); margin-bottom: 48px; font-weight: 300; }
.cta-text { font-size: 14px; color: var(--fg); font-weight: 400; }

/* Footer */
.footer { padding: 64px 40px; border-top: 1px solid var(--border); }
.footer-inner { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }
.footer-logo { font-family: var(--font-head); font-weight: 700; font-size: 18px; }
.footer-tagline { font-size: 14px; color: var(--muted); }
.footer-note { font-size: 12px; color: #333; margin-top: 24px; }

/* Responsive */
@media (max-width: 768px) {
  .hero { padding: 100px 24px 80px; }
  .what { padding: 80px 24px; }
  .what-grid { grid-template-columns: 1fr 1fr; }
  .how { padding: 80px 24px; }
  .how-inner { grid-template-columns: 1fr; gap: 48px; }
  .difference { padding: 80px 24px; }
  .diff-row { grid-template-columns: 140px repeat(3, 1fr); }
  .closing { padding: 80px 24px; }
  .footer { padding: 48px 24px; }
  .nav { padding: 0 24px; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .stat-sep { display: none; }
}
@media (max-width: 480px) {
  .what-grid { grid-template-columns: 1fr; }
  .diff-row { grid-template-columns: 1fr; }
  .diff-header { display: none; }
  .diff-row span { border-right: none; border-bottom: 1px solid var(--border); }
  .diff-row span:last-child { border-bottom: none; }
}