:root {
  --bg-deep: #0a0b0f;
  --bg-surface: #12131a;
  --bg-card: #1a1b25;
  --bg-code: #0d0e14;
  --fg-primary: #e8e9ed;
  --fg-secondary: #8b8d97;
  --fg-muted: #5a5c66;
  --accent: #00d4aa;
  --accent-dim: #00d4aa22;
  --accent-glow: #00d4aa15;
  --blue: #4d8eff;
  --purple: #a78bfa;
  --orange: #f59e0b;
  --red: #ef4444;
  --font-body: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-deep);
  color: var(--fg-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 11, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--fg-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo .logo-icon {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1rem;
  background: var(--accent-dim);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
}

.nav-tag {
  font-size: 0.75rem;
  color: var(--fg-muted);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
  font-weight: 500;
}

/* Hero */
.hero {
  padding: 10rem 2rem 4rem;
  max-width: 900px;
  margin: 0 auto;
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,170,0.15);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 2rem;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--fg-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* Code Demo */
.code-section {
  padding: 2rem 2rem 6rem;
  max-width: 900px;
  margin: 0 auto;
}

.code-window {
  background: var(--bg-code);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0,0,0,0.4);
}

.code-header {
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
}

.code-dot:nth-child(1) { background: var(--red); opacity: 0.7; }
.code-dot:nth-child(2) { background: var(--orange); opacity: 0.7; }
.code-dot:nth-child(3) { background: var(--accent); opacity: 0.7; }

.code-tab {
  margin-left: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-muted);
}

.code-body {
  padding: 1.5rem;
  overflow-x: auto;
}

.code-body pre {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--fg-secondary);
}

.code-body .kw { color: var(--purple); }
.code-body .fn { color: var(--blue); }
.code-body .str { color: var(--accent); }
.code-body .cm { color: var(--fg-muted); font-style: italic; }
.code-body .num { color: var(--orange); }

.code-arrow {
  display: flex;
  justify-content: center;
  padding: 2rem 0;
}

.code-arrow svg {
  color: var(--accent);
  opacity: 0.4;
}

.output-window {
  background: var(--bg-code);
  border: 1px solid rgba(0,212,170,0.12);
  border-radius: 12px;
  overflow: hidden;
}

.output-header {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.output-status {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.output-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-muted);
}

.output-body {
  padding: 1.5rem;
}

.output-body pre {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--fg-secondary);
}

.output-body .key { color: var(--blue); }
.output-body .val-str { color: var(--accent); }
.output-body .val-num { color: var(--orange); }

/* Document Types */
.doc-types {
  padding: 6rem 2rem;
  background: var(--bg-surface);
}

.doc-types-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.doc-types h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.doc-types .section-desc {
  color: var(--fg-secondary);
  font-size: 1.05rem;
  max-width: 550px;
  margin-bottom: 3.5rem;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
  overflow: hidden;
}

.doc-card {
  background: var(--bg-card);
  padding: 2rem;
  transition: background 0.2s;
}

.doc-card:hover {
  background: rgba(26, 27, 37, 0.8);
}

.doc-card-icon {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  display: block;
}

.doc-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.doc-card p {
  font-size: 0.875rem;
  color: var(--fg-secondary);
  line-height: 1.6;
}

/* Metrics */
.metrics {
  padding: 6rem 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.metrics h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 3.5rem;
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.metric-item {
  border-left: 2px solid var(--accent-dim);
  padding-left: 1.5rem;
}

.metric-value {
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.metric-label {
  font-size: 0.9rem;
  color: var(--fg-secondary);
  line-height: 1.5;
}

/* Closing */
.closing {
  padding: 8rem 2rem;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.closing h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  position: relative;
}

.closing p {
  color: var(--fg-secondary);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto;
  position: relative;
}

/* Footer */
.footer {
  padding: 2rem;
  border-top: 1px solid rgba(255,255,255,0.04);
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1000px;
  margin: 0 auto;
}

.footer-logo {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--fg-muted);
}

.footer-right {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .hero { padding: 8rem 1.5rem 3rem; }
  .doc-grid { grid-template-columns: 1fr; }
  .metric-row { grid-template-columns: 1fr; gap: 2.5rem; }
  .code-section { padding: 2rem 1rem 4rem; }
  .code-body pre { font-size: 0.75rem; }
  .output-body pre { font-size: 0.7rem; }
  .nav { padding: 1rem 1.5rem; }
  .footer { flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .doc-types { padding: 4rem 1.5rem; }
  .metrics { padding: 4rem 1.5rem; }
  .closing { padding: 5rem 1.5rem; }
}