:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --bg-color: #09090b;
  --bg-card: #121215;
  --bg-code: #18181b;
  --border-color: #27272a;
  --text-main: #f4f4f5;
  --text-muted: #a1a1aa;
  
  --brand-color: #818cf8;
  --brand-hover: #6366f1;
  --brand-ink: #c7d2fe;
}

[data-theme="light"] {
  --bg-color: #ffffff;
  --bg-card: #f8fafc;
  --bg-code: #f1f5f9;
  --border-color: #e2e8f0;
  --text-main: #0f172a;
  --text-muted: #64748b;
  
  --brand-color: #4f46e5;
  --brand-hover: #4338ca;
  --brand-ink: #312e81;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Nav */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
[data-theme="light"] .site-nav {
  background: rgba(255, 255, 255, 0.85);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.brand-badge {
  background: rgba(129, 140, 248, 0.15);
  color: var(--brand-color);
  border: 1px solid rgba(129, 140, 248, 0.3);
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 9999px;
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.875rem;
}
.nav-link {
  color: var(--text-muted);
  transition: color 0.15s;
}
.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  transition: all 0.15s;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background-color: var(--text-main);
  color: var(--bg-color);
}
.btn-primary:hover {
  opacity: 0.9;
}
.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-main);
}
.btn-outline:hover {
  background: var(--bg-code);
}
.btn-sm {
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
}

/* Hero */
.hero {
  padding: 5rem 1.5rem 3.5rem;
  max-width: 1200px;
  margin: 0 auto;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.hero-tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--brand-color);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: 1.25rem;
}
.hero-title .muted {
  display: block;
  color: var(--text-muted);
}
.hero-desc {
  max-width: 640px;
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.cmd-box {
  display: flex;
  align-items: center;
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.4rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-main);
  gap: 0.75rem;
}
.cmd-text {
  user-select: all;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--border-color);
  background-color: var(--border-color);
  gap: 1px;
}
@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.stat-card {
  background-color: var(--bg-color);
  padding: 1.5rem 2rem;
}
.stat-val {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}
.stat-unit {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 0.25rem;
}
.stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* Code Playground */
.playground-section {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-code);
}
.tab-header {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-color);
}
.tab-btn {
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  border-right: 1px solid var(--border-color);
  background: transparent;
  border-top: none;
  border-left: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
}
.tab-btn:hover {
  color: var(--text-main);
}
.tab-btn.active {
  color: var(--text-main);
  background: var(--bg-code);
  border-bottom-color: var(--brand-color);
}

.code-layout {
  display: grid;
  grid-template-columns: 1fr;
}
@media (min-width: 1024px) {
  .code-layout {
    grid-template-columns: 1.3fr 1fr;
  }
}
.code-col {
  border-right: 1px solid var(--border-color);
  min-width: 0;
}
.code-header {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  padding: 0.6rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}
.code-content {
  padding: 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.info-col {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.info-title {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.info-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  background-color: var(--border-color);
  gap: 1px;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.feature-card {
  background-color: var(--bg-color);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background-color 0.15s;
}
.feature-card:hover {
  background-color: var(--bg-card);
}
.feature-title {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.feature-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}