:root {
  /* ── Color Scales (kigen.design — Tailwind CSS algorithm) ── */

  /* Cyan (Scooter) — primary accent */
  --cyan-50: #d8f6ff;
  --cyan-100: #96eafe;
  --cyan-200: #22d3ee;
  --cyan-300: #1ec2da;
  --cyan-400: #19aac0;
  --cyan-500: #1490a3;
  --cyan-600: #0e7484;
  --cyan-700: #085865;
  --cyan-800: #043c45;
  --cyan-900: #012127;
  --cyan-950: #011418;

  /* Purple (Purple Heart) — secondary accent */
  --purple-50: #f4eefe;
  --purple-100: #e6d8fd;
  --purple-200: #d3b6fc;
  --purple-300: #c297fa;
  --purple-400: #b477f9;
  --purple-500: #a855f7;
  --purple-600: #9e28f5;
  --purple-700: #7c19c4;
  --purple-800: #570e8b;
  --purple-900: #310551;
  --purple-950: #1d0234;

  /* Indigo (Blue Ribbon) — gradient midpoint */
  --indigo-50: #eff0fe;
  --indigo-100: #dadafc;
  --indigo-200: #b9baf9;
  --indigo-300: #9b9df7;
  --indigo-400: #7f81f4;
  --indigo-500: #6366f1;
  --indigo-600: #4b4fee;
  --indigo-700: #242de5;
  --indigo-800: #171da5;
  --indigo-900: #090d64;
  --indigo-950: #040642;

  /* Teal (Caribbean Green) — gradient origin */
  --teal-50: #baffe6;
  --teal-100: #31ffcc;
  --teal-200: #06e8b8;
  --teal-300: #05d5a8;
  --teal-400: #04bb93;
  --teal-500: #039e7c;
  --teal-600: #027f64;
  --teal-700: #01604b;
  --teal-800: #004132;
  --teal-900: #00241a;
  --teal-950: #00150e;

  /* Navy (Bunker) — surfaces and backgrounds */
  --navy-50: #f0f0f4;
  --navy-100: #d8dae4;
  --navy-200: #b4b9cd;
  --navy-300: #959cb8;
  --navy-400: #7882a4;
  --navy-500: #616a89;
  --navy-600: #4c536d;
  --navy-700: #393f53;
  --navy-800: #272b3a;
  --navy-900: #171a24;
  --navy-950: #0b0d14;

  /* ── Semantic Tokens ── */
  --background: var(--navy-950);
  --surface: #111520;
  --surface-elevated: #1a1f2e;
  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(34,211,238,0.2);
  --text-primary: var(--navy-50);
  --text-secondary: var(--navy-400);
  --text-muted: var(--navy-600);
  --accent: var(--cyan-200);
  --accent-secondary: var(--purple-500);
  --accent-glow: rgba(34,211,238,0.12);
  --accent-glow-purple: rgba(168,85,247,0.12);
  --accent-bright: var(--cyan-100);
  --gradient: linear-gradient(135deg, var(--teal-200) 0%, var(--cyan-200) 25%, var(--indigo-500) 65%, var(--purple-500) 100%);
  --gradient-text: linear-gradient(135deg, var(--cyan-200), var(--purple-500));
  --code-bg: #080a10;
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  --glass-bg: rgba(11,13,20,0.85);
  --glass-border: rgba(34,211,238,0.08);

  /* Typography */
  --font-family-display: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-body: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-mono: JetBrains Mono, 'Fira Code', Consolas, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  --font-size-hero: clamp(2rem, 4vw, 3.5rem);
  --font-size-section: clamp(1.5rem, 3vw, 2.25rem);
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;
  --space-48: 12rem;
  --space-56: 14rem;
  --space-64: 16rem;

  /* Layout */
  --max-width-content: 1200px;
  --max-width-docs: 768px;
  --nav-height: 60px;
  --section-padding-y: 6rem;
  --section-padding-y-docs: 3rem;
  --container-padding-x: 1.5rem;

  /* Borders */
  --radius-sm: 0.25rem;
  --radius: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --border-width: 1px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px var(--accent-glow), 0 0 40px var(--accent-glow-purple);
  --shadow-glow-lg: 0 0 40px var(--accent-glow), 0 0 80px var(--accent-glow-purple);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
  --transition-bounce: 150ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Z-index */
  --z-nav: 50;
  --z-modal: 100;
  --z-tooltip: 200;
}

/* Reset and base styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--text-secondary);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--text-primary);
  line-height: var(--line-height-tight);
}

h1 {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-extrabold);
}

h2 {
  font-size: var(--font-size-section);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-bright);
}

strong {
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

/* Layout utilities */
.container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--container-padding-x);
}

.container-docs {
  max-width: var(--max-width-docs);
  margin: 0 auto;
  padding: 0 var(--container-padding-x);
}

.section {
  padding: var(--section-padding-y) 0;
}

.section-docs {
  padding: var(--section-padding-y-docs) 0;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border-bottom: var(--border-width) solid var(--border);
  z-index: var(--z-nav);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--container-padding-x);
}

.nav-brand {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand img {
  height: 24px;
  width: 24px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  cursor: pointer;
}

/* Mobile navigation */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: var(--border-width) solid var(--border);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle {
    display: block;
  }
}

/* Footer */
.footer {
  border-top: var(--border-width) solid var(--border);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-24);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.footer-link {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--text-secondary);
}

.footer-tagline {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.footer-tagline img {
  height: 16px;
  width: 16px;
  opacity: 0.5;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  font-weight: var(--font-weight-semibold);
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.btn-primary:hover {
  color: #fff;
  box-shadow: 0 0 24px var(--accent-glow), 0 0 48px var(--accent-glow-purple);
  filter: brightness(1.1);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: rgba(34,211,238,0.25);
}

.btn-secondary:hover {
  background: rgba(34,211,238,0.06);
  border-color: rgba(34,211,238,0.4);
  color: var(--text-primary);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

/* Cards */
.card {
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: rgba(34,211,238,0.15);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 20px var(--accent-glow);
}

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: var(--border-width) solid var(--glass-border);
}

.card-glass:hover {
  border-color: rgba(34,211,238,0.15);
  box-shadow: 0 0 24px var(--accent-glow);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.card-description {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Code blocks */
.code-block {
  background: var(--code-bg);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--space-6) 0;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--surface);
  border-bottom: var(--border-width) solid var(--border);
}

.code-dots {
  display: flex;
  gap: var(--space-2);
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.code-dot:nth-child(1) { background: #ef4444; }
.code-dot:nth-child(2) { background: #f59e0b; }
.code-dot:nth-child(3) { background: #22c55e; }

.code-title {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  font-family: var(--font-family-mono);
}

.code-copy {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.code-copy:hover {
  color: var(--text-secondary);
}

.code-content {
  padding: var(--space-4);
  overflow-x: auto;
}

.code-content pre {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--text-primary);
  white-space: pre;
}

/* Syntax highlighting */
.hljs-keyword { color: #67e8f9; }
.hljs-string { color: #4ade80; }
.hljs-comment { color: var(--text-muted); }
.hljs-variable { color: var(--accent-bright); }
.hljs-attr { color: var(--accent-bright); }
.hljs-number { color: #fbbf24; }
.hljs-literal { color: #f472b6; }

/* Grid layouts */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.badge-script {
  background: rgba(34, 197, 94, 0.1);
  color: #4ade80;
  border: var(--border-width) solid rgba(34, 197, 94, 0.2);
}

.badge-llm {
  background: var(--accent-glow);
  color: var(--accent-bright);
  border: var(--border-width) solid rgba(168, 85, 247, 0.3);
}

.badge-agent {
  background: rgba(59, 130, 246, 0.1);
  color: #60a5fa;
  border: var(--border-width) solid rgba(59, 130, 246, 0.2);
}

.badge-human {
  background: rgba(245, 158, 11, 0.1);
  color: #fbbf24;
  border: var(--border-width) solid rgba(245, 158, 11, 0.2);
}

.badge-featured {
  background: var(--accent-glow);
  color: var(--accent-bright);
  border: var(--border-width) solid var(--accent);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
    filter: blur(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes flow {
  0% {
    stroke-dashoffset: 20;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-bright); }

.font-mono { font-family: var(--font-family-mono); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.hidden { display: none; }
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }

.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

/* Responsive utilities */
@media (max-width: 640px) {
  .sm\:hidden { display: none; }
  .sm\:block { display: block; }
}

@media (max-width: 768px) {
  .md\:hidden { display: none; }
  .md\:block { display: block; }
}

@media (max-width: 1024px) {
  .lg\:hidden { display: none; }
  .lg\:block { display: block; }
}

/* Page-specific body padding for fixed nav */
body {
  padding-top: var(--nav-height);
}