/* === BASE === */
:root {
  --bg: #0a0c10;
  --surface: #111318;
  --surface-2: #191c23;
  --border: rgba(255,255,255,0.07);
  --fg: #e8eaf0;
  --fg-muted: #7a8090;
  --accent: #f5a623;
  --accent-dim: rgba(245,166,35,0.12);
  --green: #34d399;
  --red: #f87171;
  --blue: #60a5fa;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Fira Code', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* === NAV === */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 48px;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(10,12,16,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.5px;
  color: var(--fg);
}

.nav-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 48px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(245,166,35,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  align-items: center;
}

.hero-content { max-width: 520px; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-headline {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -2px;
  color: var(--fg);
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 18px;
  line-height: 1.7;
  color: var(--fg-muted);
  margin-bottom: 48px;
  max-width: 460px;
}

.hero-metrics {
  display: flex;
  align-items: center;
  gap: 24px;
}

.metric { display: flex; flex-direction: column; gap: 4px; }

.metric-value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  color: var(--accent);
}

.metric-label {
  font-size: 12px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.metric-sep {
  width: 1px;
  height: 36px;
  background: var(--border);
}

/* === SIGNAL FEED === */
.hero-visual { display: flex; justify-content: flex-end; }

.signal-feed {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.signal-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.signal-dot {
  width: 8px; height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.signal-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.signal-item:last-child { border-bottom: none; }

.signal-tag {
  font-family: var(--font-mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 7px;
  border-radius: 3px;
  background: var(--accent-dim);
  color: var(--accent);
  white-space: nowrap;
  margin-top: 2px;
}

.signal-tag--news { background: rgba(96,165,250,0.12); color: var(--blue); }
.signal-tag--brief { background: rgba(52,211,153,0.12); color: var(--green); }
.signal-tag--signal { background: rgba(168,85,247,0.12); color: #c084fc; }
.signal-tag--monitor { background: rgba(251,113,133,0.12); color: var(--red); }

.signal-text {
  font-size: 13px;
  line-height: 1.5;
  color: var(--fg);
}

.signal-time {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  white-space: nowrap;
  margin-top: 3px;
}

/* === HOW IT WORKS === */
.how-it-works {
  padding: 100px 48px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.how-inner { max-width: 1200px; margin: 0 auto; }

.how-label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 48px;
}

.how-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.step {
  flex: 1;
  padding-right: 48px;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 48px;
  font-weight: 500;
  color: var(--accent);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 20px;
}

.step-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--fg);
}

.step-content p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg-muted);
}

.step-arrow {
  width: 48px;
  height: 2px;
  background: var(--border);
  margin-top: 24px;
  flex-shrink: 0;
  position: relative;
}

.step-arrow::after {
  content: '→';
  position: absolute;
  right: -4px;
  top: -14px;
  color: var(--fg-muted);
  font-size: 18px;
}

/* === FEATURES === */
.features {
  padding: 100px 48px;
}

.features-inner { max-width: 1200px; margin: 0 auto; }

.features-heading {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 56px;
  color: var(--fg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.feature-card {
  background: var(--surface);
  padding: 36px 32px;
  transition: background 0.2s;
}

.feature-card:hover {
  background: var(--surface-2);
}

.feature-icon {
  width: 44px; height: 44px;
  background: var(--accent-dim);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-muted);
}

/* === CLOSING === */
.closing {
  padding: 120px 48px;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg) 0%, var(--surface) 100%);
}

.closing-inner { max-width: 1200px; margin: 0 auto; }

.closing-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 24px;
}

.closing-headline {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.1;
  color: var(--fg);
  margin-bottom: 28px;
  max-width: 680px;
}

.closing-sub {
  font-size: 18px;
  line-height: 1.7;
  color: var(--fg-muted);
  max-width: 560px;
}

/* === FOOTER === */
.footer {
  padding: 48px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--fg);
}

.footer-tagline {
  font-size: 13px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { justify-content: flex-start; }
  .signal-feed { max-width: 100%; }
  .how-steps { flex-direction: column; gap: 40px; }
  .step-arrow { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 12px; }
}

@media (max-width: 600px) {
  .hero { padding: 100px 24px 60px; }
  .how-it-works { padding: 60px 24px; }
  .features { padding: 60px 24px; }
  .closing { padding: 80px 24px; }
  .nav { padding: 0 24px; }
  .hero-metrics { gap: 16px; }
  .metric-value { font-size: 16px; }
}