/* Production-ready CSS optimizations and utilities */

/* CSS Custom Properties for consistent theming */
:root {
  /* Primary Colors */
  --primary-blue: #2563eb;
  --secondary-blue: #3bc9f3;
  --light-blue: #60a5fa;
  --dark-blue: #1e40af;
  
  /* Gradients */
  --gradient-primary: linear-gradient(120deg, #607d8b, #90caf9, #42a5f5);
  --gradient-nav: linear-gradient(90deg, #2563eb, #1d4ed8);
  --gradient-text: linear-gradient(90deg, #3f4c6b, #606c88);
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.18);
  
  /* Transitions */
  --transition-fast: all 0.15s ease;
  --transition-default: all 0.3s ease;
  --transition-slow: all 0.5s ease;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

/* Performance optimizations */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

/* Optimize font loading */
body {
  font-display: swap;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Image optimization */
img {
  max-width: 100%;
  height: auto;
  loading: lazy;
}

/* Critical images should not be lazy loaded */
.hero-image,
.logo img,
.above-fold img {
  loading: eager;
}

/* Utility classes for performance */
.gpu-accelerated {
  transform: translateZ(0);
  will-change: transform;
}

.smooth-scroll {
  scroll-behavior: smooth;
}

/* Focus management */
.focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}

/* Loading states */
.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--primary-blue);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Error states */
.error-state {
  border: 1px solid #dc2626;
  background-color: #fef2f2;
  color: #dc2626;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
}

/* Success states */
.success-state {
  border: 1px solid #059669;
  background-color: #f0fdf4;
  color: #059669;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
}

/* Enhanced button styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-default);
  cursor: pointer;
  border: none;
  outline: none;
  position: relative;
  overflow: hidden;
}

.btn:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--primary-blue);
  color: white;
}

.btn-primary:hover {
  background: var(--dark-blue);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: white;
  color: var(--primary-blue);
  border: 1px solid var(--primary-blue);
}

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

/* Enhanced card component */
.card-enhanced {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: var(--transition-default);
}

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

/* Accessibility improvements */
.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;
}

/* Skip link for keyboard navigation */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-blue);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  z-index: 9999;
}

.skip-link:focus {
  top: 6px;
}

/* Print styles */
@media print {
  .no-print,
  nav,
  .mobile-menu,
  .video-modal {
    display: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .card {
    break-inside: avoid;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --primary-blue: #0066cc;
    --secondary-blue: #004499;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
  }
  
  .dark-mode-support {
    background: var(--bg-primary);
    color: var(--text-primary);
  }
}

/* Enhanced grid system */
.grid-responsive {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-responsive-2 {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-responsive-3 {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Enhanced spacing utilities */
.space-y-responsive > * + * {
  margin-top: var(--spacing-md);
}

@media (min-width: 768px) {
  .space-y-responsive > * + * {
    margin-top: var(--spacing-lg);
  }
}

/* Container queries (for modern browsers) */
@container (min-width: 320px) {
  .container-responsive {
    padding: var(--spacing-sm);
  }
}

@container (min-width: 768px) {
  .container-responsive {
    padding: var(--spacing-lg);
  }
}

/* Enhanced responsive typography */
.text-responsive {
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  line-height: 1.6;
}

.text-responsive-lg {
  font-size: clamp(1.25rem, 4vw, 2.5rem);
  line-height: 1.4;
}

.text-responsive-xl {
  font-size: clamp(1.5rem, 6vw, 4rem);
  line-height: 1.2;
}

/* Enhanced form styles */
.form-input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: var(--radius-md);
  transition: var(--transition-default);
  font-size: 1rem;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input.error {
  border-color: #dc2626;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-input.success {
  border-color: #059669;
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
}

/* Enhanced animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease-out;
}

.animate-fadeInLeft {
  animation: fadeInLeft 0.6s ease-out;
}

.animate-fadeInRight {
  animation: fadeInRight 0.6s ease-out;
}

/* Video modal enhancements */
.video-modal {
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.video-modal video {
  box-shadow: var(--shadow-xl);
}

/* Enhanced hover effects */
.hover-lift {
  transition: var(--transition-default);
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.hover-scale {
  transition: var(--transition-default);
}

.hover-scale:hover {
  transform: scale(1.02);
}

/* Modern scrollbar styling */
.custom-scrollbar {
  scrollbar-width: thin;
  scrollbar-color: var(--primary-blue) #f1f5f9;
}

.custom-scrollbar::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.custom-scrollbar::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: var(--radius-sm);
}

.custom-scrollbar::-webkit-scrollbar-thumb {
  background: var(--primary-blue);
  border-radius: var(--radius-sm);
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
  background: var(--dark-blue);
}