/* Tridea Presentation Page Theme - Transitioning Colors */

:root {
  /* Brand Colors */
  --tridea-teal: oklch(0.4200 0.1200 220.0000);
  --tridea-orange: oklch(0.7000 0.1500 50.0000);
  --tridea-charcoal: oklch(0.1800 0 0);

  /* Section Background Colors with Gradient Transitions */
  --section-1-bg: oklch(0.9800 0.0100 80.0000);  /* Light cream */
  --section-2-bg: oklch(0.9500 0.0150 75.0000);  /* Soft beige */
  --section-3-bg: oklch(0.1800 0 0);             /* Dark charcoal */
  --section-4-bg: oklch(0.9700 0.0100 65.0000);  /* Light warm */
  --section-5-bg: oklch(0.9600 0.0120 70.0000);  /* Soft warm white */
  --section-6-bg: oklch(0.9800 0.0050 90.0000);  /* Clean white */
  --section-7-bg: oklch(0.9500 0.0100 80.0000);  /* Light gray-cream */
  --section-8-bg: oklch(0.9600 0.0110 75.0000);  /* Soft neutral */
  --section-9-bg: oklch(0.1800 0 0);             /* Dark charcoal */

  /* Text Colors */
  --foreground-light: oklch(0.1800 0 0);
  --foreground-dark: oklch(0.9900 0 0);
  --muted-light: oklch(0.4500 0 0);
  --muted-dark: oklch(0.7500 0 0);

  /* Accent Colors */
  --accent-primary: var(--tridea-teal);
  --accent-secondary: var(--tridea-orange);
  --accent-tertiary: oklch(0.6500 0.1800 280.0000); /* Purple accent */

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-2xl: 8rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 hsl(0 0% 0% / 0.05);
  --shadow-md: 0 4px 6px -1px hsl(0 0% 0% / 0.1), 0 2px 4px -1px hsl(0 0% 0% / 0.06);
  --shadow-lg: 0 10px 15px -3px hsl(0 0% 0% / 0.1), 0 4px 6px -2px hsl(0 0% 0% / 0.05);
  --shadow-xl: 0 20px 25px -5px hsl(0 0% 0% / 0.1), 0 10px 10px -5px hsl(0 0% 0% / 0.04);

  /* Gradient Overlays for Smooth Transitions */
  --gradient-warm: linear-gradient(180deg, oklch(0.98 0.01 80) 0%, oklch(0.95 0.015 75) 100%);
  --gradient-cool: linear-gradient(180deg, oklch(0.96 0.012 70) 0%, oklch(0.98 0.005 90) 100%);
  --gradient-teal: linear-gradient(135deg, oklch(0.42 0.12 220) 0%, oklch(0.52 0.14 220) 100%);
  --gradient-dark: linear-gradient(180deg, oklch(0.18 0 0) 0%, oklch(0.15 0 0) 100%);
}

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

body {
  font-family: var(--font-sans) !important;
  line-height: 1.6;
  color: var(--foreground-light);
  background: oklch(0.98 0 0);
  overflow-x: hidden;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600 !important;
  line-height: 1.2 !important;
}

h1 {
  font-size: 3.5rem !important;
  letter-spacing: -0.02em !important;
}

h2 {
  font-size: 2.5rem !important;
  letter-spacing: -0.01em !important;
}

h3 {
  font-size: 1.75rem !important;
}

h4 {
  font-size: 1.25rem !important;
}

/* Section Number Styling */
.section-number {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  opacity: 0.6;
  margin-bottom: var(--spacing-sm);
}

/* Card Styles */
.card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-dark {
  background: oklch(0.22 0 0);
  color: var(--foreground-dark);
}

/* Button Styles */
.btn-primary {
  background: var(--accent-secondary);
  color: white;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: oklch(0.65 0.16 50);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  color: var(--accent-primary);
  padding: 0.875rem 2rem;
  border-radius: var(--radius-xl);
  font-weight: 600;
  border: 2px solid var(--accent-primary);
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background: var(--accent-primary);
  color: white;
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

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

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem !important;
  }

  h2 {
    font-size: 2rem !important;
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

/* Section Transition Effects */
.section-transition {
  position: relative;
}

.section-transition::after {
  content: '';
  position: absolute;
  bottom: -2rem;
  left: 0;
  right: 0;
  height: 4rem;
  background: linear-gradient(to bottom, transparent, var(--next-section-bg));
  pointer-events: none;
}

/* Numbered List Styling */
.numbered-list {
  list-style: none;
  counter-reset: item;
}

.numbered-list li {
  counter-increment: item;
  margin-bottom: var(--spacing-md);
  padding-left: 3rem;
  position: relative;
}

.numbered-list li::before {
  content: counter(item, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.5rem;
  color: var(--accent-secondary);
}

/* Image Placeholder Styles */
.image-placeholder {
  background: oklch(0.95 0 0);
  border-radius: var(--radius-md);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.image-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: oklch(0.96 0 0);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.nav-tab {
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
  color: var(--muted-light);
}

.nav-tab:hover {
  background: white;
  color: var(--foreground-light);
}

.nav-tab.active {
  background: white;
  color: var(--foreground-light);
  box-shadow: var(--shadow-sm);
}

/* Utility Classes */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.text-muted {
  color: var(--muted-light);
}

.text-muted-dark {
  color: var(--muted-dark);
}

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-xl { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }
.py-2xl { padding-top: var(--spacing-2xl); padding-bottom: var(--spacing-2xl); }