/* CSS Custom Properties for theming */
:root {
  /* Light theme colors */
  --color-bg: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-border: #e2e8f0;
  --color-code-bg: #f1f5f9;
  --color-shadow: rgba(0, 0, 0, 0.1);
  
  /* Typography */
  --font-family-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, Inconsolata, 'Roboto Mono', Consolas, 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --content-max-width: 800px;
  --border-radius: 0.5rem;
  
  /* Transitions */
  --transition: all 0.2s ease-in-out;
}

/* Dark theme colors */
[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-accent: #60a5fa;
  --color-accent-hover: #3b82f6;
  --color-border: #334155;
  --color-code-bg: #1e293b;
  --color-shadow: rgba(0, 0, 0, 0.3);
}

/* Reset and base styles */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: var(--transition);
}

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

/* Header */
.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

.nav-logo {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.25rem;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Language switcher */
.language-switcher {
  position: relative;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: none;
  border: 1px solid var(--color-border);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.875rem;
  min-width: 80px;
}

.lang-toggle:hover {
  border-color: var(--color-accent);
  background-color: var(--color-bg-secondary);
}

.lang-toggle:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.lang-current {
  font-weight: 500;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 140px;
  z-index: 50;
  padding: var(--spacing-xs) 0;
}

.language-switcher:hover .lang-menu,
.lang-toggle:focus + .lang-menu,
.lang-menu:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-menu li {
  margin: 0;
}

.lang-menu a {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.875rem;
  border-radius: 0;
}

.lang-menu a:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-accent);
}

.lang-menu a:focus {
  outline: none;
  background-color: var(--color-accent);
  color: white;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  padding: var(--spacing-xs);
  border-radius: var(--border-radius);
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  border-color: var(--color-accent);
}

.theme-icon--dark {
  display: none;
}

[data-theme="dark"] .theme-icon--light {
  display: none;
}

[data-theme="dark"] .theme-icon--dark {
  display: block;
}

/* Main content */
.main-content {
  min-height: calc(100vh - 200px);
  padding: var(--spacing-2xl) 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

h1 { 
  font-size: 2.5rem; 
  margin-bottom: var(--spacing-lg);
}
h2 { 
  font-size: 1.875rem; 
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
}
h3 { 
  font-size: 1.5rem;
  margin-top: var(--spacing-xl);
}
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

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

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

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

/* Lists */
ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
  max-width: var(--content-max-width);
}

li {
  margin-bottom: var(--spacing-xs);
}

/* Code blocks */
pre {
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  overflow-x: auto;
  position: relative;
  font-family: var(--font-family-mono);
  font-size: 0.875rem;
  line-height: 1.5;
}

code {
  font-family: var(--font-family-mono);
  font-size: 0.875rem;
  background-color: var(--color-code-bg);
  padding: 0.125rem 0.25rem;
  border-radius: 0.25rem;
  border: 1px solid var(--color-border);
}

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

/* Copy button for code blocks */
.code-block-wrapper {
  position: relative;
}

.copy-button {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: var(--spacing-xs);
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 0.75rem;
  transition: var(--transition);
  opacity: 0;
}

.code-block-wrapper:hover .copy-button {
  opacity: 1;
}

.copy-button:hover {
  background-color: var(--color-accent);
  color: white;
}

.copy-button.copied {
  background-color: #10b981;
  color: white;
}

/* Cards for content sections */
.card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 1px 3px var(--color-shadow);
  transition: var(--transition);
}

.card:hover {
  box-shadow: 0 4px 6px var(--color-shadow);
}

.card h3 {
  margin-top: 0;
}

/* Footer */
.site-footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-2xl);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

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

.footer-left {
  margin: 0;
}

.github-star-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: transparent;
  color: var(--color-text-secondary);
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition);
  white-space: nowrap;
}

.github-star-btn:hover {
  background-color: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-accent);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px var(--color-shadow);
}

/* Responsive design */
@media (max-width: 768px) {
  .nav-container {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .nav-controls {
    gap: var(--spacing-sm);
  }
  
  .main-content {
    padding: var(--spacing-xl) 0;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  
  pre {
    padding: var(--spacing-md);
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .main-content {
    padding: var(--spacing-lg) 0;
  }
  
  h1 { font-size: 1.75rem; }
}

/* Heading anchor links */
.heading-anchor {
  color: var(--color-text-secondary);
  text-decoration: none;
  margin-left: 0.5rem;
  opacity: 0;
  transition: opacity 0.2s ease;
  font-weight: normal;
}

.heading-anchor:hover {
  color: var(--color-accent);
  text-decoration: none;
}

h1:hover .heading-anchor,
h2:hover .heading-anchor,
h3:hover .heading-anchor,
h4:hover .heading-anchor,
h5:hover .heading-anchor,
h6:hover .heading-anchor {
  opacity: 1;
}

/* Make sure headings have relative positioning for anchor placement */
h1, h2, h3, h4, h5, h6 {
  position: relative;
}

/* Adjust scroll padding to account for fixed header when jumping to anchors */
html {
  scroll-padding-top: 5rem;
}