:root {
  --bg-deep: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --fg: #e2e8f0;
  --fg-muted: #8892a4;
  --fg-dim: #4a5568;
  --accent: #22d3a7;
  --accent-glow: rgba(34, 211, 167, 0.15);
  --accent-dim: #1a9e7e;
  --red-muted: #f87171;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Space Grotesk', -apple-system, sans-serif;
  --radius: 12px;
  --max-w: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-deep);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---- HERO ---- */
.hero {
  min-height: 90vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 32px 60px;
  gap: 60px;
  position: relative;
}

.hero-badge {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--accent);
  background: var(--accent-glow);
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid rgba(34, 211, 167, 0.2);
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--fg-muted);
  max-width: 520px;
  line-height: 1.7;
}

/* Radar visual */
.hero-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 420px;
  justify-self: center;
}

.radar-ring {
  position: absolute;
  border: 1px solid rgba(34, 211, 167, 0.12);
  border-radius: 50%;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

.ring-1 { width: 90%; height: 90%; animation: pulse-ring 4s ease-in-out infinite; }
.ring-2 { width: 60%; height: 60%; animation: pulse-ring 4s ease-in-out 1.3s infinite; }
.ring-3 { width: 30%; height: 30%; animation: pulse-ring 4s ease-in-out 2.6s infinite; }

@keyframes pulse-ring {
  0%, 100% { border-color: rgba(34, 211, 167, 0.08); }
  50% { border-color: rgba(34, 211, 167, 0.25); }
}

.radar-dot {
  position: absolute;
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
}

.dot-1 { top: 22%; left: 65%; animation: blink 3s ease-in-out infinite; }
.dot-2 { top: 58%; left: 28%; animation: blink 3s ease-in-out 1s infinite; }
.dot-3 { top: 72%; left: 70%; animation: blink 3s ease-in-out 2s infinite; }

@keyframes blink {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

.radar-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 28px;
  color: var(--accent);
  text-shadow: 0 0 20px rgba(34, 211, 167, 0.5);
}

/* ---- SIGNAL SECTION ---- */
.signal {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 32px;
}

.signal-header {
  margin-bottom: 56px;
}

.mono-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
}

.signal-header h2, .how h2, .versus h2, .closing h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.signal-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: background 0.2s, border-color 0.2s;
}

.signal-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(34, 211, 167, 0.15);
}

.signal-icon {
  font-size: 24px;
  color: var(--accent);
  margin-bottom: 16px;
  font-family: var(--mono);
}

.signal-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.signal-card p {
  color: var(--fg-muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

/* ---- HOW SECTION ---- */
.how {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 32px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.how h2 {
  margin-bottom: 56px;
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.how-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 36px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  align-items: start;
}

.step-num {
  font-family: var(--mono);
  font-size: 2.2rem;
  font-weight: 500;
  color: var(--accent);
  opacity: 0.6;
  line-height: 1;
  padding-top: 4px;
}

.step-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  max-width: 560px;
}

/* ---- VERSUS SECTION ---- */
.versus {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 32px;
}

.versus h2 {
  margin-bottom: 48px;
}

.versus-table {
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
}

.versus-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
}

.versus-row:not(:last-child) {
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.versus-cell {
  padding: 18px 24px;
  font-size: 0.92rem;
}

.versus-header .versus-cell {
  background: var(--bg-card);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--fg-muted);
  padding: 14px 24px;
}

.versus-cell.label {
  font-weight: 600;
  color: var(--fg);
}

.versus-cell.old {
  color: var(--fg-dim);
}

.versus-cell.new {
  color: var(--accent);
  font-weight: 500;
}

/* ---- CLOSING ---- */
.closing {
  padding: 120px 32px;
  text-align: center;
}

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
}

.closing h2 {
  margin-bottom: 20px;
}

.closing-sub {
  color: var(--fg-muted);
  font-size: 1.1rem;
}

/* ---- FOOTER ---- */
.site-footer {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 40px 32px;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-weight: 600;
  font-size: 1rem;
  color: var(--fg);
}

.footer-note {
  font-size: 0.82rem;
  color: var(--fg-dim);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 60px 20px 40px;
    gap: 40px;
  }

  .hero-visual {
    max-width: 280px;
    order: -1;
  }

  .signal { padding: 60px 20px; }
  .signal-grid { grid-template-columns: 1fr; }

  .how { padding: 60px 20px; }
  .how-step {
    grid-template-columns: 50px 1fr;
    gap: 16px;
  }
  .step-num { font-size: 1.6rem; }

  .versus { padding: 60px 20px; }
  .versus-cell { padding: 12px 14px; font-size: 0.82rem; }
  .versus-header .versus-cell { font-size: 10px; padding: 10px 14px; }

  .closing { padding: 80px 20px; }
  .site-footer { padding: 30px 20px; }
  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .versus-row {
    grid-template-columns: 1fr;
  }
  .versus-cell { padding: 8px 14px; }
  .versus-header { display: none; }
  .versus-cell.label { background: var(--bg-card); padding: 12px 14px 4px; }
  .versus-cell.old::before { content: 'Legacy: '; color: var(--fg-dim); font-size: 0.78rem; }
  .versus-cell.new::before { content: 'Prysmwatch: '; color: var(--accent); font-size: 0.78rem; }
}