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

:root {
  --bg: #0d0d0d;
  --surface: #141414;
  --border: #222222;
  --fg: #f0f0f0;
  --muted: #888;
  --accent: #00e87a;
  --accent-dim: rgba(0, 232, 122, 0.12);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; border-bottom: 1px solid var(--border); background: rgba(13,13,13,0.85); backdrop-filter: blur(12px); }
.nav-inner { max-width: 1100px; margin: 0 auto; padding: 16px 32px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 17px; letter-spacing: -0.02em; }
.nav-tagline { font-size: 13px; color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; }

/* HERO */
.hero { min-height: 100vh; display: flex; align-items: center; padding: 120px 32px 80px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: radial-gradient(ellipse 60% 50% at 30% 40%, rgba(0,232,122,0.04) 0%, transparent 70%); pointer-events: none; }
.hero-inner { max-width: 760px; position: relative; }
.hero-label { display: flex; align-items: center; gap: 10px; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-bottom: 28px; font-weight: 500; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); display: inline-block; animation: blink 2s ease-in-out infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.hero-headline { font-family: 'Space Grotesk', sans-serif; font-size: clamp(52px, 8vw, 88px); font-weight: 700; line-height: 1.0; letter-spacing: -0.04em; margin-bottom: 28px; color: var(--fg); }
.hero-sub { font-size: 18px; color: #aaa; line-height: 1.65; max-width: 520px; margin-bottom: 48px; font-weight: 300; }

/* PULSE RINGS */
.hero-pulse-wrap { position: absolute; right: -60px; top: 50%; transform: translateY(-50%); width: 280px; height: 280px; display: flex; align-items: center; justify-content: center; }
.hero-pulse-dot { width: 14px; height: 14px; border-radius: 50%; background: var(--accent); position: absolute; box-shadow: 0 0 20px rgba(0,232,122,0.6); }
.hero-pulse-ring { position: absolute; border-radius: 50%; border: 1px solid rgba(0,232,122,0.3); animation: expand 3s ease-out infinite; }
.ring1 { width: 60px; height: 60px; animation-delay: 0s; }
.ring2 { width: 120px; height: 120px; animation-delay: 1s; }
.ring3 { width: 200px; height: 200px; animation-delay: 2s; }
@keyframes expand { 0% { transform: scale(0.8); opacity: 0.8; } 100% { transform: scale(2.2); opacity: 0; } }

/* PULSE FEED */
.pulse-section { padding: 80px 32px; border-top: 1px solid var(--border); }
.pulse-label { font-family: 'Space Grotesk', sans-serif; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 36px; }
.pulse-feed { max-width: 700px; display: flex; flex-direction: column; gap: 0; }
.pulse-item { display: flex; align-items: flex-start; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--border); }
.pulse-item:first-child { border-top: 1px solid var(--border); }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: #333; border: 1.5px solid #444; flex-shrink: 0; margin-top: 6px; }
.pulse-dot.live { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 8px rgba(0,232,122,0.5); animation: blink 2s ease-in-out infinite; }
.pulse-source { font-family: 'Space Grotesk', sans-serif; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-bottom: 4px; }
.pulse-event { font-size: 15px; font-weight: 500; color: var(--fg); margin-bottom: 4px; }
.pulse-time { font-size: 12px; color: var(--muted); }

/* FEATURES */
.features { padding: 100px 32px; border-top: 1px solid var(--border); background: #0f0f0f; }
.features-header { max-width: 600px; margin-bottom: 60px; }
.features-tag { font-family: 'Space Grotesk', sans-serif; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
.features-header h2 { font-family: 'Space Grotesk', sans-serif; font-size: clamp(30px, 4vw, 44px); font-weight: 600; letter-spacing: -0.03em; line-height: 1.15; }
.features-grid { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.feature-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 36px; transition: border-color 0.2s; }
.feature-card:hover { border-color: rgba(0,232,122,0.25); }
.feature-icon { width: 44px; height: 44px; background: var(--accent-dim); border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.feature-card h3 { font-family: 'Space Grotesk', sans-serif; font-size: 18px; font-weight: 600; margin-bottom: 10px; letter-spacing: -0.01em; }
.feature-card p { font-size: 14px; color: #999; line-height: 1.65; font-weight: 300; }

/* HOW */
.how { padding: 100px 32px; border-top: 1px solid var(--border); }
.how-header { max-width: 600px; margin-bottom: 64px; }
.how-tag { font-family: 'Space Grotesk', sans-serif; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
.how-header h2 { font-family: 'Space Grotesk', sans-serif; font-size: clamp(30px, 4vw, 44px); font-weight: 600; letter-spacing: -0.03em; line-height: 1.15; }
.how-steps { max-width: 760px; display: flex; flex-direction: column; }
.step { display: flex; gap: 32px; align-items: flex-start; }
.step-connector { width: 1px; height: 48px; background: var(--border); margin-left: 20px; }
.step-num { font-family: 'Space Grotesk', sans-serif; font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: 0.04em; flex-shrink: 0; padding-top: 4px; width: 40px; }
.step-body h4 { font-family: 'Space Grotesk', sans-serif; font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.step-body p { font-size: 14px; color: #888; line-height: 1.65; font-weight: 300; }

/* SIGNAL */
.signal-section { padding: 100px 32px; border-top: 1px solid var(--border); }
.signal-inner { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.signal-tag { font-family: 'Space Grotesk', sans-serif; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 20px; }
.signal-text h2 { font-family: 'Space Grotesk', sans-serif; font-size: clamp(28px, 3.5vw, 40px); font-weight: 600; letter-spacing: -0.03em; line-height: 1.2; margin-bottom: 24px; }
.signal-text p { font-size: 15px; color: #888; line-height: 1.7; font-weight: 300; margin-bottom: 16px; }
.signal-visual { display: flex; align-items: center; justify-content: center; }
.signal-radar { position: relative; width: 240px; height: 240px; }
.radar-ring { position: absolute; border-radius: 50%; border: 1px solid rgba(0,232,122,0.15); top: 50%; left: 50%; transform: translate(-50%, -50%); }
.r1 { width: 80px; height: 80px; }
.r2 { width: 150px; height: 150px; }
.r3 { width: 220px; height: 220px; border-color: rgba(0,232,122,0.08); }
.radar-center { position: absolute; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); top: 50%; left: 50%; transform: translate(-50%, -50%); box-shadow: 0 0 16px rgba(0,232,122,0.6); }
.radar-blip { position: absolute; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.blip1 { top: 20%; left: 60%; box-shadow: 0 0 8px rgba(0,232,122,0.5); }
.blip2 { top: 55%; left: 15%; box-shadow: 0 0 8px rgba(0,232,122,0.5); }
.blip3 { top: 75%; left: 72%; box-shadow: 0 0 8px rgba(0,232,122,0.5); }

/* CLOSING */
.closing { padding: 100px 32px; border-top: 1px solid var(--border); text-align: center; }
.closing-inner { max-width: 600px; margin: 0 auto; }
.closing h2 { font-family: 'Space Grotesk', sans-serif; font-size: clamp(36px, 5vw, 60px); font-weight: 700; letter-spacing: -0.04em; line-height: 1.1; margin-bottom: 20px; }
.closing p { font-size: 18px; color: #888; font-weight: 300; }

/* FOOTER */
.footer { padding: 40px 32px; border-top: 1px solid var(--border); }
.footer-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-brand { display: flex; align-items: center; gap: 8px; font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 14px; }
.footer-sub { font-size: 13px; color: #555; }

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero { padding: 100px 24px 60px; min-height: auto; }
  .hero-pulse-wrap { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .signal-inner { grid-template-columns: 1fr; }
  .signal-visual { order: -1; }
  .signal-radar { width: 180px; height: 180px; }
  .pulse-section, .features, .how, .signal-section, .closing { padding: 72px 24px; }
  .nav-inner { padding: 14px 24px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
  .nav-tagline { display: none; }
  .step { gap: 20px; }
  .hero-headline { letter-spacing: -0.03em; }
}