:root {
  --bg: #08080e;
  --surface: #111118;
  --surface2: #1a1a22;
  --border: #22222e;
  --text: #f0f0f5;
  --text-muted: #8888a0;
  --accent: #4f6ef7;
  --accent-glow: rgba(79, 110, 247, 0.15);
  --green: #22c55e;
  --amber: #f59e0b;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* NAV */
.nav {
  padding: 24px 40px;
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 10;
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 1100px;
  margin: 0 auto;
}
.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.5px;
}
.nav-badge {
  font-size: 11px;
  font-weight: 500;
  background: var(--accent);
  color: #fff;
  padding: 2px 8px;
  border-radius: 20px;
  opacity: 0.8;
}

/* HERO */
.hero {
  position: relative;
  padding: 100px 40px 120px;
  overflow: hidden;
  text-align: left;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(79,110,247,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,110,247,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}
.hero-glow {
  position: absolute;
  top: -200px;
  left: -100px;
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(79,110,247,0.12) 0%, transparent 65%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 750px;
  margin: 0 auto;
}
.hero-eyebrow {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.hero-headline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(52px, 7vw, 88px);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -2.5px;
  margin-bottom: 28px;
  color: var(--text);
}
.hero-sub {
  font-size: 18px;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 12px;
}
.hero-sub--bold {
  font-weight: 500;
  color: var(--text);
  font-size: 20px;
}

/* FEATURES */
.features {
  padding: 80px 40px;
  border-top: 1px solid var(--border);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: 1100px;
  margin: 0 auto;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.feature-card {
  background: var(--surface);
  padding: 40px 36px;
}
.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}
.feature-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}
.feature-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* TRACE DIAGRAM */
.trace {
  padding: 80px 40px;
  border-top: 1px solid var(--border);
}
.trace-inner {
  max-width: 900px;
  margin: 0 auto;
}
.trace-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  font-family: 'Space Grotesk', monospace;
  margin-bottom: 32px;
}
.trace-label-dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.trace-diagram {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.trace-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 22px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.trace-step--start { border-left: 3px solid var(--text-muted); }
.trace-step--agent { border-left: 3px solid var(--accent); }
.trace-step--tool { border-left: 3px solid var(--amber); }
.trace-step--recovered { border-left: 3px solid var(--green); background: rgba(34, 197, 94, 0.04); }
.trace-step-role {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  min-width: 50px;
  padding-top: 2px;
}
.trace-step-text {
  font-size: 14px;
  color: var(--text);
  line-height: 1.5;
}
.trace-arrow {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 22px;
  font-family: 'Space Grotesk', monospace;
  font-size: 12px;
  color: var(--text-muted);
}
.trace-arrow--ok { color: var(--green); }
.trace-warning {
  background: rgba(245,158,11,0.1);
  color: var(--amber);
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 11px;
  margin-left: auto;
}
.trace-footer {
  display: flex;
  gap: 24px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.trace-status {
  font-family: 'Space Grotesk', monospace;
  font-size: 13px;
  color: var(--text-muted);
}
.trace-status--healthy { color: var(--green); }
.trace-status--warn { color: var(--amber); }

/* CLOSING */
.closing {
  padding: 100px 40px 120px;
  border-top: 1px solid var(--border);
  text-align: center;
  max-width: 1100px;
  margin: 0 auto;
}
.closing-statement {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -1px;
  color: var(--text);
  margin-bottom: 24px;
}
.closing-sub {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 40px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 16px;
}
.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
}

/* MOBILE */
@media (max-width: 768px) {
  .hero { padding: 70px 24px 80px; }
  .features { padding: 60px 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .trace { padding: 60px 24px; }
  .closing { padding: 70px 24px 80px; }
  .footer { padding: 24px; }
  .nav { padding: 20px 24px; }
  .footer-inner { flex-direction: column; gap: 8px; align-items: flex-start; }
  .trace-footer { flex-direction: column; gap: 8px; }
}