:root {
  --bg: #0A0A0A;
  --bg2: #111111;
  --bg3: #1A1A1A;
  --fg: #F0F0F0;
  --fg2: #888888;
  --fg3: #444444;
  --accent: #00D9FF;
  --accent-dim: rgba(0, 217, 255, 0.1);
  --amber: #FFB800;
  --amber-dim: rgba(255, 184, 0, 0.1);
  --radius: 10px;
  --font: 'Space Grotesk', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bg3);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--fg2);
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Section shared */
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 48px;
}

/* Hero */
.hero {
  padding: 80px 32px 100px;
  max-width: 1100px;
  margin: 0 auto;
}
.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.08;
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--fg2);
  line-height: 1.7;
  max-width: 440px;
  margin-bottom: 40px;
}
.hero-metrics {
  display: flex;
  align-items: center;
  gap: 24px;
}
.metric {
  display: flex;
  flex-direction: column;
}
.metric-val {
  font-family: var(--mono);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}
.metric-label {
  font-size: 0.75rem;
  color: var(--fg2);
  margin-top: 4px;
}
.metric-sep {
  width: 1px;
  height: 36px;
  background: var(--bg3);
}
.hero-img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--bg3);
  display: block;
}

/* How */
.how {
  background: var(--bg2);
  padding: 80px 32px;
  border-top: 1px solid var(--bg3);
  border-bottom: 1px solid var(--bg3);
}
.how-inner { max-width: 1100px; margin: 0 auto; }
.how-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}
.step {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--bg3);
  border-radius: 12px;
  padding: 28px;
}
.step-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}
.step-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.step-body p {
  font-size: 0.9rem;
  color: var(--fg2);
  line-height: 1.65;
}
.step-arrow {
  padding: 28px 20px;
  color: var(--fg3);
  flex-shrink: 0;
  align-self: center;
}

/* Features */
.features {
  padding: 100px 32px;
  max-width: 1100px;
  margin: 0 auto;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--bg2);
  border: 1px solid var(--bg3);
  border-radius: 12px;
  padding: 28px;
}
.feature-card-wide {
  grid-column: span 2;
  display: flex;
  flex-direction: row;
  gap: 28px;
  align-items: flex-start;
}
.feature-img {
  width: 220px;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
}
.feature-card-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.feature-card-body p {
  font-size: 0.9rem;
  color: var(--fg2);
  line-height: 1.65;
}
.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-dim);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--fg2);
  line-height: 1.65;
}
code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Nightmode */
.nightmode {
  background: var(--bg2);
  border-top: 1px solid var(--bg3);
  border-bottom: 1px solid var(--bg3);
  padding: 100px 32px;
}
.nightmode-inner { max-width: 1100px; margin: 0 auto; }
.nightmode-text { max-width: 720px; }
.nightmode-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--amber);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.nightmode-text h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.12;
  margin-bottom: 24px;
}
.nightmode-text p {
  font-size: 1.05rem;
  color: var(--fg2);
  line-height: 1.75;
}

/* Closing */
.closing {
  padding: 100px 32px;
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}
.closing-inner { max-width: 640px; margin: 0 auto; }
.closing h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
  margin-bottom: 20px;
}
.closing p {
  font-size: 1.05rem;
  color: var(--fg2);
  line-height: 1.7;
}

/* Footer */
.footer {
  border-top: 1px solid var(--bg3);
  padding: 48px 32px;
}
.footer-inner { max-width: 1100px; margin: 0 auto; }
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 12px;
}
.footer-sub {
  font-size: 0.9rem;
  color: var(--fg2);
  margin-bottom: 24px;
}
.footer-copy {
  font-size: 0.78rem;
  color: var(--fg3);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-img { display: none; }
  .hero { padding: 60px 24px 80px; }
  .how-steps { flex-direction: column; gap: 16px; }
  .step-arrow { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card-wide { grid-column: span 1; flex-direction: column; }
  .feature-img { width: 100%; height: auto; }
  .features, .how, .nightmode, .closing { padding: 60px 24px; }
}

@media (max-width: 480px) {
  .hero-metrics { gap: 16px; }
  .metric-val { font-size: 1.4rem; }
  .nav-inner { padding: 0 20px; }
}