/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #070a1a;
  --bg-alt: #0d1127;
  --fg: #e8ecf5;
  --fg-muted: #8892b0;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.08);
  --alert: #ff6b35;
  --ok: #4ade80;
  --warn: #fbbf24;
  --border: rgba(255,255,255,0.07);
  --nav-h: 64px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  line-height: 1.15;
}

/* === NAV === */
.nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding: 0 40px;
  position: sticky;
  top: 0;
  background: rgba(7,10,26,0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
}
.nav-inner { display: flex; align-items: center; gap: 16px; }
.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.nav-badge {
  font-size: 11px;
  font-family: 'Space Grotesk', sans-serif;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 20px;
  padding: 3px 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* === HERO === */
.hero {
  padding: 80px 40px 80px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-eyebrow {
  font-size: 11px;
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 20px;
}
.hero-headline {
  font-size: clamp(42px, 5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 24px;
  line-height: 1.05;
}
.hero-headline .accent { color: var(--accent); }
.hero-sub {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.badge {
  font-size: 12px;
  font-family: 'Space Grotesk', sans-serif;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
}

/* SIGNAL VIZ */
.signal-viz {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  position: relative;
  overflow: hidden;
}
.viz-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.waveform {
  width: 100%;
  height: 120px;
  display: block;
  margin-bottom: 4px;
}
.wave-slow {
  fill: none;
  stroke: #00d4ff;
  stroke-width: 1;
  opacity: 0.2;
  stroke-dasharray: 4 4;
}
.wave-med {
  fill: none;
  stroke: #00d4ff;
  stroke-width: 1.5;
  opacity: 0.5;
}
.wave-fast {
  fill: none;
  stroke: #00d4ff;
  stroke-width: 2;
  stroke-linecap: round;
}
.viz-grid {
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
  padding: 0 2px;
}
.grid-line { width: 1px; height: 40px; background: var(--border); }

.viz-alert {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,107,53,0.1);
  border: 1px solid rgba(255,107,53,0.3);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 16px;
}
.alert-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--alert);
  flex-shrink: 0;
  animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.alert-text {
  font-size: 11px;
  font-family: 'Space Grotesk', sans-serif;
  color: var(--alert);
}

.viz-rows { display: flex; flex-direction: column; gap: 8px; }
.data-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.03);
  border-radius: 8px;
}
.data-label {
  font-size: 12px;
  color: var(--fg-muted);
  min-width: 80px;
  font-family: 'Space Grotesk', sans-serif;
}
.data-val {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
  font-family: 'Space Grotesk', sans-serif;
  flex: 1;
}
.data-delta { font-size: 12px; font-family: 'Space Grotesk', sans-serif; padding: 2px 8px; border-radius: 4px; }
.data-delta.up { color: var(--ok); background: rgba(74,222,128,0.1); }
.data-delta.warn { color: var(--warn); background: rgba(251,191,36,0.1); }
.data-delta.ok { color: var(--fg-muted); background: var(--accent-dim); }

/* === FEATURES === */
.features {
  padding: 100px 40px;
  border-bottom: 1px solid var(--border);
}
.features-header { max-width: 640px; margin: 0 auto 64px; text-align: center; }
.features-header h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.features-sub { font-size: 17px; color: var(--fg-muted); line-height: 1.7; }

.feature-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  transition: border-color 0.2s;
}
.feature-card:hover { border-color: rgba(0,212,255,0.2); }
.feature-icon { margin-bottom: 20px; }
.feature-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.feature-card p { font-size: 15px; color: var(--fg-muted); line-height: 1.7; }

/* === HOW IT WORKS === */
.howitworks {
  padding: 100px 40px;
  border-bottom: 1px solid var(--border);
}
.hiw-header { max-width: 640px; margin: 0 auto 64px; text-align: center; }
.hiw-header h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  letter-spacing: -0.02em;
}
.hiw-steps {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0;
}
.hiw-step {
  flex: 1;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
}
.step-num {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 16px;
}
.step-content h3 {
  font-size: 17px;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.step-content p { font-size: 14px; color: var(--fg-muted); line-height: 1.65; }
.hiw-connector {
  flex-shrink: 0;
  padding: 0 24px;
  opacity: 0.5;
}

/* === MANIFESTO === */
.manifesto {
  padding: 100px 40px;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}
.manifesto-content {
  max-width: 800px;
  margin: 0 auto;
}
.manifesto-quote {
  border-left: 3px solid var(--accent);
  padding-left: 28px;
  margin-bottom: 48px;
}
.manifesto-quote p {
  font-size: clamp(22px, 2.5vw, 30px);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
  color: var(--fg);
  line-height: 1.4;
  font-style: italic;
}
.manifesto-body p {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.85;
  margin-bottom: 24px;
}
.manifesto-body p:last-child { margin-bottom: 0; }

/* === CLOSING === */
.closing {
  padding: 100px 40px;
  border-bottom: 1px solid var(--border);
}
.closing-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}
.closing-content h2 {
  font-size: clamp(28px, 3.5vw, 48px);
  letter-spacing: -0.025em;
  margin-bottom: 24px;
}
.closing-content p {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.closing-content p:last-child { margin-bottom: 0; }

/* === FOOTER === */
.footer {
  padding: 40px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.footer-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--fg);
}
.footer-tagline { font-size: 13px; color: var(--fg-muted); }

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .hero-content { grid-template-columns: 1fr; gap: 48px; }
  .feature-grid { grid-template-columns: 1fr; }
  .hiw-steps { flex-direction: column; gap: 16px; }
  .hiw-connector { transform: rotate(90deg); padding: 0; }
  .nav { padding: 0 24px; }
  .hero { padding: 60px 24px; }
  .features, .howitworks, .manifesto, .closing { padding: 72px 24px; }
  .footer { padding: 32px 24px; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-headline { font-size: 38px; }
  .hero-badges { gap: 8px; }
  .viz-alert { flex-wrap: wrap; }
}