/* ============================================
   Expanso Hearts OpenClaw - Design System
   A warm, distinctive sub-site of expanso.io
   ============================================ */

/* ============================================
   1. CUSTOM FONTS
   ============================================ */

/* Space Grotesk - Geometric, modern, distinctive headlines */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* Outfit - Clean, geometric body text */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

/* JetBrains Mono - Code and technical elements */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ============================================
   2. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */

:root {
  /* === Colors: Warm Tech Palette === */

  /* Backgrounds - warm charcoal, not pure black */
  --oc-bg-deep: #0a0a0e;
  --oc-bg-primary: #0f0f14;
  --oc-bg-secondary: #16161d;
  --oc-bg-elevated: #1c1c25;
  --oc-bg-hover: #22222d;

  /* Accent: Coral (primary) - warm, energetic, distinctive */
  --oc-coral: #ff6b4a;
  --oc-coral-light: #ff8a70;
  --oc-coral-dark: #e55a3a;
  --oc-coral-glow: rgba(255, 107, 74, 0.15);
  --oc-coral-border: rgba(255, 107, 74, 0.3);

  /* Accent: Amber (secondary) - data/pipeline feel */
  --oc-amber: #fbbf24;
  --oc-amber-light: #fcd34d;
  --oc-amber-glow: rgba(251, 191, 36, 0.12);

  /* Accent: Teal (tertiary) - success, security */
  --oc-teal: #2dd4bf;
  --oc-teal-glow: rgba(45, 212, 191, 0.12);

  /* Text */
  --oc-text-primary: #f5f5f0;
  --oc-text-secondary: #a8a8b3;
  --oc-text-muted: #6b6b78;
  --oc-text-inverse: #0f0f14;

  /* Borders */
  --oc-border-subtle: rgba(255, 255, 255, 0.06);
  --oc-border-default: rgba(255, 255, 255, 0.1);
  --oc-border-strong: rgba(255, 255, 255, 0.15);

  /* Shadows */
  --oc-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --oc-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --oc-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --oc-shadow-glow: 0 0 40px var(--oc-coral-glow);

  /* === Typography === */
  --oc-font-display: 'Space Grotesk', system-ui, sans-serif;
  --oc-font-body: 'Outfit', system-ui, sans-serif;
  --oc-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Font sizes - fluid typography */
  --oc-text-xs: 0.75rem;
  --oc-text-sm: 0.875rem;
  --oc-text-base: 1rem;
  --oc-text-lg: 1.125rem;
  --oc-text-xl: 1.25rem;
  --oc-text-2xl: 1.5rem;
  --oc-text-3xl: 2rem;
  --oc-text-4xl: 2.5rem;
  --oc-text-5xl: 3.5rem;
  --oc-text-hero: clamp(2.5rem, 6vw, 4.5rem);

  /* === Spacing === */
  --oc-space-1: 0.25rem;
  --oc-space-2: 0.5rem;
  --oc-space-3: 0.75rem;
  --oc-space-4: 1rem;
  --oc-space-5: 1.25rem;
  --oc-space-6: 1.5rem;
  --oc-space-8: 2rem;
  --oc-space-10: 2.5rem;
  --oc-space-12: 3rem;
  --oc-space-16: 4rem;
  --oc-space-20: 5rem;
  --oc-space-24: 6rem;

  /* === Layout === */
  --oc-container-max: 1200px;
  --oc-container-narrow: 800px;
  --oc-radius-sm: 0.375rem;
  --oc-radius-md: 0.5rem;
  --oc-radius-lg: 0.75rem;
  --oc-radius-xl: 1rem;
  --oc-radius-full: 9999px;

  /* === Transitions === */
  --oc-transition-fast: 150ms ease;
  --oc-transition-base: 250ms ease;
  --oc-transition-slow: 400ms ease;
  --oc-transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================
   3. BASE STYLES
   ============================================ */

/* Override body for this sub-site */
.oc-page {
  background: var(--oc-bg-primary);
  color: var(--oc-text-primary);
  font-family: var(--oc-font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.oc-container {
  width: 100%;
  max-width: var(--oc-container-max);
  margin: 0 auto;
  padding: 0 var(--oc-space-6);
}

.oc-container--narrow {
  max-width: var(--oc-container-narrow);
}

/* ============================================
   4. TYPOGRAPHY
   ============================================ */

.oc-heading {
  font-family: var(--oc-font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--oc-text-primary);
}

.oc-heading--hero {
  font-size: var(--oc-text-hero);
  letter-spacing: -0.03em;
  line-height: 1.0;
}

.oc-heading--1 { font-size: var(--oc-text-5xl); }
.oc-heading--2 { font-size: var(--oc-text-4xl); }
.oc-heading--3 { font-size: var(--oc-text-3xl); }
.oc-heading--4 { font-size: var(--oc-text-2xl); }
.oc-heading--5 { font-size: var(--oc-text-xl); }

.oc-text {
  font-family: var(--oc-font-body);
  color: var(--oc-text-secondary);
}

.oc-text--lg { font-size: var(--oc-text-lg); }
.oc-text--sm { font-size: var(--oc-text-sm); }
.oc-text--xs { font-size: var(--oc-text-xs); }
.oc-text--muted { color: var(--oc-text-muted); }

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

/* Gradient text for emphasis */
.oc-gradient-text {
  background: linear-gradient(135deg, var(--oc-coral) 0%, var(--oc-amber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   5. HERO SECTION
   ============================================ */

.oc-hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--oc-space-24) var(--oc-space-6);
  overflow: hidden;
}

/* Animated background grid */
.oc-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.oc-hero__grid {
  position: absolute;
  inset: -50%;
  background-image:
    linear-gradient(var(--oc-border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--oc-border-subtle) 1px, transparent 1px);
  background-size: 60px 60px;
  transform: perspective(500px) rotateX(60deg);
  transform-origin: center top;
  animation: grid-drift 20s linear infinite;
}

@keyframes grid-drift {
  0% { background-position: 0 0; }
  100% { background-position: 60px 60px; }
}

/* Glowing orb behind hero */
.oc-hero__glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(
    ellipse at center,
    var(--oc-coral-glow) 0%,
    transparent 60%
  );
  filter: blur(60px);
  pointer-events: none;
}

.oc-hero__glow--secondary {
  top: 40%;
  background: radial-gradient(
    ellipse at center,
    var(--oc-amber-glow) 0%,
    transparent 60%
  );
}

.oc-hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}

/* Partnership badge */
.oc-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--oc-space-2);
  padding: var(--oc-space-2) var(--oc-space-4);
  background: var(--oc-coral-glow);
  border: 1px solid var(--oc-coral-border);
  border-radius: var(--oc-radius-full);
  font-family: var(--oc-font-display);
  font-size: var(--oc-text-sm);
  font-weight: 600;
  color: var(--oc-coral);
  margin-bottom: var(--oc-space-6);
}

.oc-badge__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--oc-coral);
  border-radius: 50%;
  color: white;
  font-size: 12px;
}

/* Hero title with animated underline */
.oc-hero__title {
  font-family: var(--oc-font-display);
  font-size: var(--oc-text-hero);
  font-weight: 700;
  color: var(--oc-text-primary);
  margin: 0 0 var(--oc-space-6);
  letter-spacing: -0.03em;
  line-height: 1.0;
}

.oc-hero__title-highlight {
  position: relative;
  display: inline-block;
}

.oc-hero__title-highlight::after {
  content: '';
  position: absolute;
  bottom: 0.1em;
  left: 0;
  right: 0;
  height: 0.15em;
  background: linear-gradient(90deg, var(--oc-coral), var(--oc-amber));
  border-radius: var(--oc-radius-full);
  transform: scaleX(0);
  transform-origin: left;
  animation: underline-grow 1s ease 0.5s forwards;
}

@keyframes underline-grow {
  to { transform: scaleX(1); }
}

.oc-hero__subtitle {
  font-size: var(--oc-text-xl);
  color: var(--oc-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--oc-space-8);
  line-height: 1.6;
}

/* ============================================
   6. BUTTONS
   ============================================ */

.oc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--oc-space-2);
  padding: var(--oc-space-3) var(--oc-space-6);
  font-family: var(--oc-font-display);
  font-size: var(--oc-text-base);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--oc-radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--oc-transition-fast);
}

.oc-btn--primary {
  background: linear-gradient(135deg, var(--oc-coral) 0%, var(--oc-coral-dark) 100%);
  color: white;
  box-shadow:
    0 4px 14px rgba(255, 107, 74, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.oc-btn--primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 8px 24px rgba(255, 107, 74, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.oc-btn--secondary {
  background: var(--oc-bg-elevated);
  color: var(--oc-text-primary);
  border: 1px solid var(--oc-border-strong);
}

.oc-btn--secondary:hover {
  background: var(--oc-bg-hover);
  border-color: var(--oc-coral-border);
  color: var(--oc-coral-light);
}

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

.oc-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--oc-space-4);
  justify-content: center;
}

/* ============================================
   7. SECTION LAYOUTS
   ============================================ */

.oc-section {
  padding: var(--oc-space-20) 0;
  position: relative;
}

.oc-section--alt {
  background: var(--oc-bg-secondary);
}

.oc-section--gradient {
  background: linear-gradient(
    180deg,
    var(--oc-bg-primary) 0%,
    var(--oc-bg-secondary) 100%
  );
}

.oc-section__header {
  text-align: center;
  margin-bottom: var(--oc-space-12);
}

.oc-section__title {
  font-family: var(--oc-font-display);
  font-size: var(--oc-text-4xl);
  font-weight: 700;
  color: var(--oc-text-primary);
  margin: 0 0 var(--oc-space-4);
}

.oc-section__subtitle {
  font-size: var(--oc-text-lg);
  color: var(--oc-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   8. CARDS
   ============================================ */

.oc-card {
  background: var(--oc-bg-elevated);
  border: 1px solid var(--oc-border-default);
  border-radius: var(--oc-radius-lg);
  padding: var(--oc-space-6);
  transition: all var(--oc-transition-base);
}

.oc-card:hover {
  border-color: var(--oc-coral-border);
  transform: translateY(-4px);
  box-shadow: var(--oc-shadow-md);
}

.oc-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--oc-coral-glow);
  border-radius: var(--oc-radius-md);
  margin-bottom: var(--oc-space-4);
  font-size: 1.5rem;
}

.oc-card__title {
  font-family: var(--oc-font-display);
  font-size: var(--oc-text-xl);
  font-weight: 600;
  color: var(--oc-text-primary);
  margin: 0 0 var(--oc-space-2);
}

.oc-card__text {
  font-size: var(--oc-text-sm);
  color: var(--oc-text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* Card grid */
.oc-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--oc-space-6);
}

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

@media (max-width: 900px) {
  .oc-card-grid--3 {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   9. FEATURE HIGHLIGHT (Security/Value Props)
   ============================================ */

.oc-feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--oc-space-16);
  align-items: center;
}

@media (max-width: 900px) {
  .oc-feature-grid {
    grid-template-columns: 1fr;
    gap: var(--oc-space-8);
  }
}

.oc-feature-grid--reverse {
  direction: rtl;
}

.oc-feature-grid--reverse > * {
  direction: ltr;
}

.oc-feature__visual {
  position: relative;
}

.oc-feature__content {
  max-width: 500px;
}

/* ============================================
   10. ANIMATED DATA FLOW DIAGRAM
   ============================================ */

.oc-dataflow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--oc-space-4);
  padding: var(--oc-space-8);
  background: var(--oc-bg-secondary);
  border-radius: var(--oc-radius-xl);
  border: 1px solid var(--oc-border-default);
}

.oc-dataflow__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--oc-space-2);
  padding: var(--oc-space-4) var(--oc-space-6);
  background: var(--oc-bg-elevated);
  border: 2px solid var(--oc-border-strong);
  border-radius: var(--oc-radius-lg);
  min-width: 120px;
}

.oc-dataflow__node--user {
  border-color: var(--oc-teal);
}

.oc-dataflow__node--ai {
  border-color: var(--oc-amber);
}

.oc-dataflow__node--expanso {
  border-color: var(--oc-coral);
  background: var(--oc-coral-glow);
}

.oc-dataflow__icon {
  font-size: 2rem;
}

.oc-dataflow__label {
  font-family: var(--oc-font-display);
  font-size: var(--oc-text-sm);
  font-weight: 600;
  color: var(--oc-text-primary);
}

.oc-dataflow__sublabel {
  font-size: var(--oc-text-xs);
  color: var(--oc-text-muted);
}

/* Animated arrow between nodes */
.oc-dataflow__arrow {
  position: relative;
  width: 60px;
  height: 2px;
  background: var(--oc-border-strong);
}

.oc-dataflow__arrow::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--oc-coral);
  animation: arrow-flow 1.5s ease-in-out infinite;
}

@keyframes arrow-flow {
  0% { left: 0; opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

.oc-dataflow__arrow::after {
  content: '→';
  position: absolute;
  right: -8px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--oc-text-muted);
  font-size: var(--oc-text-sm);
}

/* ============================================
   11. STATS/METRICS
   ============================================ */

.oc-stats {
  display: flex;
  justify-content: center;
  gap: var(--oc-space-12);
  padding: var(--oc-space-8) 0;
  flex-wrap: wrap;
}

.oc-stat {
  text-align: center;
}

.oc-stat__value {
  font-family: var(--oc-font-mono);
  font-size: var(--oc-text-4xl);
  font-weight: 700;
  color: var(--oc-coral);
  line-height: 1;
  margin-bottom: var(--oc-space-2);
}

.oc-stat__label {
  font-family: var(--oc-font-display);
  font-size: var(--oc-text-sm);
  color: var(--oc-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   12. CODE BLOCKS
   ============================================ */

.oc-code {
  background: var(--oc-bg-deep);
  border: 1px solid var(--oc-border-default);
  border-radius: var(--oc-radius-lg);
  overflow: hidden;
}

.oc-code__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--oc-space-3) var(--oc-space-4);
  background: var(--oc-bg-secondary);
  border-bottom: 1px solid var(--oc-border-subtle);
}

.oc-code__dots {
  display: flex;
  gap: var(--oc-space-2);
}

.oc-code__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--oc-bg-hover);
}

.oc-code__dot--red { background: #ff5f56; }
.oc-code__dot--yellow { background: #ffbd2e; }
.oc-code__dot--green { background: #27ca40; }

.oc-code__title {
  font-family: var(--oc-font-mono);
  font-size: var(--oc-text-xs);
  color: var(--oc-text-muted);
}

.oc-code__body {
  padding: var(--oc-space-4);
  overflow-x: auto;
}

.oc-code__body pre {
  margin: 0;
  font-family: var(--oc-font-mono);
  font-size: var(--oc-text-sm);
  line-height: 1.7;
  color: var(--oc-text-secondary);
}

/* Syntax highlighting */
.oc-code .comment { color: var(--oc-text-muted); }
.oc-code .keyword { color: var(--oc-coral); }
.oc-code .string { color: var(--oc-teal); }
.oc-code .number { color: var(--oc-amber); }
.oc-code .function { color: var(--oc-coral-light); }

/* ============================================
   13. CTA SECTION
   ============================================ */

.oc-cta {
  position: relative;
  padding: var(--oc-space-20) var(--oc-space-6);
  text-align: center;
  overflow: hidden;
}

.oc-cta__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    var(--oc-coral-glow) 0%,
    transparent 50%,
    var(--oc-amber-glow) 100%
  );
  opacity: 0.5;
}

.oc-cta__content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.oc-cta__title {
  font-family: var(--oc-font-display);
  font-size: var(--oc-text-3xl);
  font-weight: 700;
  color: var(--oc-text-primary);
  margin: 0 0 var(--oc-space-4);
}

.oc-cta__text {
  font-size: var(--oc-text-lg);
  color: var(--oc-text-secondary);
  margin: 0 0 var(--oc-space-8);
}

/* ============================================
   14. FLOATING CALLOUT BAR
   ============================================ */

.oc-callout-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--oc-space-4);
  padding: var(--oc-space-4) var(--oc-space-6);
  background: var(--oc-bg-elevated);
  border: 1px solid var(--oc-border-default);
  border-radius: var(--oc-radius-xl);
  margin: var(--oc-space-8) auto;
  max-width: var(--oc-container-max);
}

.oc-callout-bar__content {
  display: flex;
  align-items: center;
  gap: var(--oc-space-4);
}

.oc-callout-bar__icon {
  font-size: 1.5rem;
}

.oc-callout-bar__text {
  font-size: var(--oc-text-sm);
  color: var(--oc-text-secondary);
}

.oc-callout-bar__text strong {
  color: var(--oc-text-primary);
}

/* ============================================
   15. SCROLL ANIMATIONS
   ============================================ */

.oc-animate {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

.oc-animate.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.oc-animate--delay-1 { transition-delay: 0.1s; }
.oc-animate--delay-2 { transition-delay: 0.2s; }
.oc-animate--delay-3 { transition-delay: 0.3s; }
.oc-animate--delay-4 { transition-delay: 0.4s; }

/* Stagger children */
.oc-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.4s ease,
    transform 0.4s ease;
}

.oc-stagger.is-visible > *:nth-child(1) { transition-delay: 0.0s; opacity: 1; transform: translateY(0); }
.oc-stagger.is-visible > *:nth-child(2) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.oc-stagger.is-visible > *:nth-child(3) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.oc-stagger.is-visible > *:nth-child(4) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }
.oc-stagger.is-visible > *:nth-child(5) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }
.oc-stagger.is-visible > *:nth-child(6) { transition-delay: 0.5s; opacity: 1; transform: translateY(0); }

/* ============================================
   16. RESPONSIVE UTILITIES
   ============================================ */

@media (max-width: 768px) {
  :root {
    --oc-text-hero: 2.5rem;
    --oc-text-5xl: 2.5rem;
    --oc-text-4xl: 2rem;
    --oc-text-3xl: 1.75rem;
  }

  .oc-hero {
    min-height: auto;
    padding: var(--oc-space-16) var(--oc-space-4);
  }

  .oc-section {
    padding: var(--oc-space-12) 0;
  }

  .oc-btn-group {
    flex-direction: column;
    align-items: center;
  }

  .oc-btn--lg {
    width: 100%;
    max-width: 300px;
  }

  .oc-dataflow {
    flex-direction: column;
    gap: var(--oc-space-6);
  }

  .oc-dataflow__arrow {
    width: 2px;
    height: 40px;
    transform: rotate(90deg);
  }

  .oc-callout-bar {
    flex-direction: column;
    text-align: center;
  }
}

/* ============================================
   17. DARK/LIGHT SAFEGUARDS
   ============================================ */

/* Ensure proper contrast */
.oc-page a:not(.oc-btn) {
  color: var(--oc-coral);
  text-decoration: none;
  transition: color var(--oc-transition-fast);
}

.oc-page a:not(.oc-btn):hover {
  color: var(--oc-coral-light);
  text-decoration: underline;
}

/* Selection color */
.oc-page ::selection {
  background: var(--oc-coral);
  color: white;
}