/* Performance Optimized CSS - Critical Above-the-fold Styles */ /* Critical Path CSS - Inline in for fastest render */ * { box-sizing: border-box; margin: 0; padding: 0; } html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; } body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif; line-height: 1.6; color: #333; background-color: #fff; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeSpeed; } /* Critical header styles for LCP optimization */ .header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(0, 0, 0, 0.1); transform: translateZ(0); /* GPU acceleration */ will-change: background-color; } .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; } .navbar { display: flex; align-items: center; justify-content: space-between; height: 70px; } .navbar-brand { display: flex; align-items: center; text-decoration: none; font-weight: 700; color: #1a1a1a; } /* Critical hero section for LCP */ .hero { min-height: 100vh; display: flex; align-items: center; position: relative; overflow: hidden; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); padding-top: 70px; } .hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 2; } .hero-title { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; line-height: 1.1; margin-bottom: 1.5rem; color: white; text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); } /* Responsive optimization for mobile-first */ @media (max-width: 768px) { .hero-content { grid-template-columns: 1fr; gap: 40px; text-align: center; } .hero-title { font-size: 2.5rem; } .container { padding: 0 16px; } } /* Loading states and skeleton screens */ .loading-skeleton { background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%); background-size: 200% 100%; animation: loading 1.5s infinite; } @keyframes loading { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } } /* Critical button styles */ .btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; border: none; border-radius: 8px; font-size: 16px; font-weight: 600; text-decoration: none; cursor: pointer; transition: all 0.2s ease; will-change: transform; } .btn-primary { background: linear-gradient(135deg, #3b82f6, #1d4ed8); color: white; box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3); } .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4); } /* Performance-focused visibility utilities */ .hidden { display: none !important; } .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; } /* Intersection Observer performance optimization */ .fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; will-change: opacity, transform; } .fade-in.visible { opacity: 1; transform: translateY(0); } /* Image optimization classes */ .lazy-image { opacity: 0; transition: opacity 0.3s ease; } .lazy-image.loaded { opacity: 1; } /* Critical Web Vitals optimizations */ .optimize-cls { /* Prevent Cumulative Layout Shift */ aspect-ratio: attr(width) / attr(height); width: 100%; height: auto; } /* Preconnect and DNS prefetch hints are handled in HTML head */ /* Resource hints for performance */ .prefetch-image { position: absolute; top: -9999px; left: -9999px; width: 1px; height: 1px; opacity: 0; } /* Mobile-first responsive design */ @media (max-width: 480px) { .hero { min-height: 90vh; } .hero-title { font-size: 2rem; line-height: 1.2; } .btn { padding: 10px 20px; font-size: 14px; } }