/* Bryan Howard Theme - JavaScript Enhancements & Mobile Optimizations */

/* === JAVASCRIPT ENHANCEMENTS === */

/* Copy Code Button */
.copy-code-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  padding: var(--space-2);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 10;
}

.copy-code-btn:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.copy-code-btn.copied {
  background-color: var(--color-secondary-soft);
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

/* Header Scroll Effects */
.site-header.scrolled {
  background-color: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px var(--shadow-md);
}

/* Form Enhancements */
.input-wrapper {
  position: relative;
}

.input-wrapper.focused .form-label {
  transform: translateY(-1.5rem) scale(0.875);
  color: var(--color-primary);
}

.form-input.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px var(--color-error-soft);
}

.error-message {
  color: var(--color-error);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
  display: none;
}

/* Lazy Loading Images */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity var(--transition-normal);
}

img[loading="lazy"].loaded {
  opacity: 1;
}

/* Loading States */
.loading-state {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-8);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-primary);
  border-top: 3px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Animations */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

/* Page Transitions */
.page-transition {
  animation: fadeIn 0.3s ease-out;
}

body.loaded .article-card,
body.loaded .project-card,
body.loaded .archive-card {
  animation: fadeIn 0.6s ease-out;
}

/* === MOBILE OPTIMIZATIONS === */

/* Touch-friendly buttons */
@media (hover: none) and (pointer: coarse) {
  .btn,
  .nav-link,
  .social-link,
  .pagination-link,
  .tag-link {
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .mobile-menu-toggle,
  .theme-toggle,
  .copy-code-btn {
    min-height: 44px;
    min-width: 44px;
  }
  
  /* Larger tap targets for mobile */
  .footer-link,
  .breadcrumb-link,
  .meta-link {
    padding: var(--space-2);
    margin: calc(var(--space-1) * -1);
    border-radius: var(--radius-md);
  }
}

/* Mobile-specific interactions */
@media (max-width: 768px) {
  /* Disable hover effects on mobile */
  .card:hover,
  .btn:hover,
  .social-link:hover {
    transform: none;
    box-shadow: none;
  }
  
  /* Mobile-optimized spacing */
  .hero-section {
    padding: var(--space-12) 0 var(--space-8);
  }
  
  .section-header {
    margin-bottom: var(--space-6);
  }
  
  /* Mobile navigation enhancements */
  .main-nav.active {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 4px 20px var(--shadow-lg);
  }
  
  .nav-menu {
    padding: var(--space-4) 0;
  }
  
  .nav-link {
    font-size: var(--text-lg);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-2);
  }
  
  /* Mobile form improvements */
  .form-input {
    font-size: 16px; /* Prevents zoom on iOS */
    padding: var(--space-4);
  }
  
  .form-textarea {
    min-height: 150px;
  }
  
  /* Mobile-optimized code blocks */
  pre {
    font-size: var(--text-xs);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .copy-code-btn {
    position: static;
    margin-top: var(--space-3);
    width: 100%;
    justify-content: center;
  }
}

/* === ACCESSIBILITY ENHANCEMENTS === */

/* High contrast mode support */
@media (prefers-contrast: high) {
  .btn {
    border-width: 2px;
  }
  
  .card {
    border-width: 2px;
  }
  
  .nav-link:focus,
  .btn:focus,
  .form-input:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .card,
  .btn,
  .social-link,
  img[loading="lazy"] {
    transition: none;
  }
  
  .loading-spinner {
    animation: none;
  }
  
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus management */
.skip-link:focus,
.focus\\:not-sr-only:focus {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  background-color: var(--color-primary);
  color: white;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  z-index: var(--z-modal);
  transform: translateY(0);
}

/* Keyboard navigation indicators */
.nav-link:focus-visible,
.btn:focus-visible,
.social-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  background-color: var(--color-primary-soft);
}

/* === PRINT OPTIMIZATIONS === */

@media print {
  /* Hide interactive elements */
  .mobile-menu-toggle,
  .theme-toggle,
  .copy-code-btn,
  .nav-menu,
  .social-menu,
  .pagination,
  .btn,
  .loading-spinner {
    display: none !important;
  }
  
  /* Optimize colors for print */
  * {
    color: #000 !important;
    background: transparent !important;
    box-shadow: none !important;
  }
  
  .card,
  .alert,
  pre {
    border: 1px solid #000 !important;
  }
  
  /* Page breaks */
  .article-header,
  .section-header {
    page-break-after: avoid;
  }
  
  .card,
  .archive-card,
  .project-card {
    page-break-inside: avoid;
    margin-bottom: 1rem;
  }
  
  /* Print-specific sizing */
  body {
    font-size: 12pt;
    line-height: 1.4;
  }
  
  h1 { font-size: 18pt; }
  h2 { font-size: 16pt; }
  h3 { font-size: 14pt; }
  
  .container {
    max-width: none;
    padding: 0;
  }
}

/* === DARK MODE SPECIFIC ENHANCEMENTS === */

.theme-dark {
  color-scheme: dark;
}

.theme-dark .copy-code-btn {
  background-color: var(--bg-code);
}

.theme-dark .site-header.scrolled {
  background-color: rgba(10, 10, 10, 0.95);
}

/* === PERFORMANCE OPTIMIZATIONS === */

/* Use GPU acceleration for smooth animations */
.card,
.btn,
.social-link,
.nav-link {
  will-change: transform;
  transform: translateZ(0);
}

/* Optimize font loading */
@font-face {
  font-family: 'Inter';
  font-display: swap;
  src: local('Inter'), local('Inter-Regular');
}

/* Lazy load non-critical CSS */
.advanced-features {
  content-visibility: auto;
  contain-intrinsic-size: 0 500px;
}

/* === UTILITY CLASSES === */

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

.u-hide {
  display: none !important;
}

.u-show {
  display: block !important;
}

.u-text-center {
  text-align: center !important;
}

.u-mt-0 { margin-top: 0 !important; }
.u-mb-0 { margin-bottom: 0 !important; }
.u-mt-4 { margin-top: var(--space-4) !important; }
.u-mb-4 { margin-bottom: var(--space-4) !important; }

/* === RESPONSIVE IMAGES === */

.responsive-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.image-placeholder {
  background-color: var(--bg-tertiary);
  background-image: linear-gradient(45deg, var(--border-primary) 25%, transparent 25%),
                    linear-gradient(-45deg, var(--border-primary) 25%, transparent 25%),
                    linear-gradient(45deg, transparent 75%, var(--border-primary) 75%),
                    linear-gradient(-45deg, transparent 75%, var(--border-primary) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  color: var(--text-muted);
}