/* CSS Custom Properties for Theming */
:root {
  --primary-color: #2563eb;
  --secondary-color: #64748b;
  --accent-color: #f59e0b;
  --text-color: #1f2937;
  --bg-color: #ffffff;
  --bg-secondary: #f8fafc;
  --border-color: #e2e8f0;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 16px;
  --line-height: 1.6;
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --max-width: 1200px;
  --header-height: 60px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text-color: #f1f5f9;
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --border-color: #334155;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  }
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--text-color);
  background-color: var(--bg-color);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

code {
  background-color: var(--bg-secondary);
  padding: 0.125rem 0.25rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
}

pre {
  background-color: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: 8px;
  overflow-x: auto;
  margin: var(--spacing-md) 0;
}

pre code {
  background: none;
  padding: 0;
}

.cta-button {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 6px;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.cta-button:hover {
  background-color: #1d4ed8;
}

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

/* Header and Navigation */
header {
  position: sticky;
  top: 0;
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  height: var(--header-height);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--spacing-md);
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-links a {
  padding: var(--spacing-sm);
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-color);
  border-bottom: 2px solid var(--accent-color);
}

/* Mobile Navigation */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

#mobile-menu {
  display: none;
}

#mobile-menu:checked ~ .nav-links {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--bg-color);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-md);
}

/* Main Content */
main {
  padding-top: var(--spacing-xl);
}

section {
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid var(--border-color);
}

section:last-of-type {
  border-bottom: none;
}

/* Hero Section */
.hero {
  text-align: center;
  background-color: var(--bg-secondary);
  padding: var(--spacing-xl) 0;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

/* Content Sections */
.content-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

@media (min-width: 768px) {
  .content-section {
    grid-template-columns: 1fr 2fr;
  }
}

.sidebar {
  background-color: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: 8px;
}

.main-content {
  padding-left: var(--spacing-lg);
}

/* Features Grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.feature-card {
  background-color: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.feature-card h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

/* Footer */
footer {
  background-color: var(--bg-secondary);
  padding: var(--spacing-xl) 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }

  #mobile-menu:checked ~ .nav-links {
    display: flex;
  }
}

  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }

  .container {
    padding: 0 var(--spacing-sm);
  }

  section {
    padding: var(--spacing-lg) 0;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .features {
    grid-template-columns: 1fr;
  }
}

/* Parallax Styles */
[data-speed] {
  will-change: transform;
  backface-visibility: hidden;
  transform: translateZ(0);
}

@media (max-width: 768px) {
  [data-speed] {
    will-change: auto;
    transform: none !important;
  }
}

/* WebGL Background Canvas */
#webgl-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none;
  }

  [data-speed] {
    will-change: auto;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}