/* Optimized Modern Animation System */
        .shine-text {
            background: linear-gradient(90deg,
                var(--primary-500) 0%,
                var(--accent-indigo) 25%,
                var(--primary-400) 50%,
                var(--accent-cyan) 75%,
                var(--primary-500) 100%);
            background-size: 300% 100%;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: shine 4s var(--ease-in-out) infinite;
            will-change: background-position;
            contain: layout style paint;
        }

        @keyframes shine {
            0%, 100% {
                background-position: 0% 50%;
            }
            50% {
                background-position: 100% 50%;
            }
        }

        /* Performance-Optimized Entrance Animations */
        .animate-in {
            opacity: 0;
            transform: translate3d(0, 30px, 0) scale(0.96);
            transition: all var(--duration-700) var(--ease-out);
            will-change: transform, opacity;
        }

        .animate-in.visible {
            opacity: 1;
            transform: translate3d(0, 0, 0) scale(1);
        }

        .animate-in.delay-1 { transition-delay: var(--duration-100); }
        .animate-in.delay-2 { transition-delay: var(--duration-200); }
        .animate-in.delay-3 { transition-delay: var(--duration-300); }

        /* Enhanced Glass Card System */
        .glass-card {
            background: var(--glass-regular);
            backdrop-filter: var(--blur-lg) saturate(150%) brightness(105%);
            border: 1px solid var(--glass-border-medium);
            border-radius: var(--radius-3xl);
            box-shadow:
                var(--shadow-xl),
                inset 0 1px 0 var(--glass-highlight),
                inset 0 -1px 0 rgba(0, 0, 0, 0.02);
            transition: all var(--duration-300) var(--ease-out);
            position: relative;
            overflow: hidden;
            will-change: transform, box-shadow;
        }

        .glass-card::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: linear-gradient(135deg,
                rgba(255, 255, 255, 0.4) 0%,
                rgba(255, 255, 255, 0.1) 50%,
                rgba(255, 255, 255, 0.4) 100%);
            border-radius: inherit;
            opacity: 0;
            transition: opacity var(--duration-300) var(--ease-out);
            pointer-events: none;
            z-index: -1;
        }

        .glass-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
                rgba(59, 130, 246, 0.08) 0%,
                transparent 50%);
            opacity: 0;
            transition: opacity var(--duration-300) var(--ease-out);
            pointer-events: none;
            border-radius: inherit;
        }

        .glass-card:hover::before {
            opacity: 1;
        }

        .glass-card:hover::after {
            opacity: 1;
        }

        .glass-card:hover {
            transform: translateY(-4px) scale(1.01);
            background: var(--glass-thick);
            backdrop-filter: var(--blur-xl) saturate(180%) brightness(108%);
            border-color: var(--glass-border-strong);
            box-shadow:
                var(--shadow-2xl),
                inset 0 1px 0 var(--glass-highlight),
                0 0 40px rgba(59, 130, 246, 0.15);
        }

        /* Enhanced Navigation */
        .nav-glass {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(24px) saturate(200%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
        }

        /* Floating Elements */
        .float-element {
            animation: float 6s ease-in-out infinite;
        }

        .float-element:nth-child(2n) {
            animation-delay: -2s;
        }

        .float-element:nth-child(3n) {
            animation-delay: -4s;
        }

        @keyframes float {
            0%, 100% {
                transform: translateY(0px) rotate(0deg);
            }
            50% {
                transform: translateY(-10px) rotate(1deg);
            }
        }

        /* Modern Code Blocks */
        .glass-code {
            background: rgba(17, 24, 39, 0.95);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(55, 65, 81, 0.3);
            border-radius: var(--radius-lg);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.1),
                0 8px 32px rgba(0, 0, 0, 0.2);
        }

        /* Improved Focus States */
        .focus-ring {
            outline: 2px solid transparent;
            outline-offset: 2px;
            transition: outline-color 0.2s ease;
        }

        .focus-ring:focus {
            outline-color: var(--claude-blue);
        }

        /* Smooth Gradient Background */
        .gradient-mesh {
            background: linear-gradient(135deg,
                rgba(59, 130, 246, 0.1) 0%,
                rgba(139, 92, 246, 0.1) 25%,
                rgba(16, 185, 129, 0.1) 50%,
                rgba(59, 130, 246, 0.1) 75%,
                rgba(245, 158, 11, 0.1) 100%);
            background-size: 400% 400%;
            animation: gradientShift 15s ease infinite;
        }

        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        
        .gradient-bg {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        
        .code-block {
            position: relative;
            overflow-x: auto;
        }
        
        .copy-btn {
            position: absolute;
            top: 1rem;
            right: 1rem;
            opacity: 0.8;
            transition: opacity 0.2s ease;
        }
        
        .copy-btn:hover {
            opacity: 1;
        }
        
        .code-block:hover .copy-btn {
            opacity: 1;
        }
        
        /* Simplified interactions - less flashy */
        html {
            scroll-behavior: smooth;
        }
        
        /* Button and card hover effects */
        .btn-hover-lift {
            transition: box-shadow 0.2s ease;
        }
        
        .btn-hover-lift:hover {
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }
        
        .card-hover {
            transition: box-shadow 0.2s ease;
        }
        
        .card-hover:hover {
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
        }
        
        /* Focus states for accessibility */
        .focus-visible {
            outline: 2px solid #3b82f6;
            outline-offset: 2px;
        }
        
        /* Reduced motion support */
        @media (prefers-reduced-motion: reduce) {
            *, ::before, ::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
            
            html {
                scroll-behavior: auto;
            }
        }
        
        /* Optimized animations */
        .fade-in-up {
            animation: fadeInUp 0.6s ease-out;
            will-change: transform, opacity;
        }
        
        .bounce-in {
            animation: bounceIn 0.8s ease-out;
            will-change: transform, opacity;
        }
        
        .float {
            animation: float 3s ease-in-out infinite;
            will-change: transform;
        }
        
        .pulse-slow {
            animation: pulse 4s ease-in-out infinite;
            will-change: transform;
        }
        
        @keyframes fadeInUp {
            from { 
                opacity: 0; 
                transform: translateY(30px); 
            }
            to { 
                opacity: 1; 
                transform: translateY(0); 
            }
        }
        
        @keyframes bounceIn {
            0% {
                opacity: 0;
                transform: scale(0.3);
            }
            50% {
                opacity: 1;
                transform: scale(1.05);
            }
            70% {
                transform: scale(0.9);
            }
            100% {
                opacity: 1;
                transform: scale(1);
            }
        }
        
        @keyframes float {
            0%, 100% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-10px);
            }
        }
        
        .scroll-reveal {
            opacity: 0;
            transform: translateY(50px);
            transition: all 0.6s ease;
            will-change: transform, opacity;
        }
        
        .scroll-reveal.revealed {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* Anchor offset for fixed navbar */
        section[id] { scroll-margin-top: 5rem; }
        
        /* Optimized ripple effect */
        .ripple {
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.6);
            transform: scale(0);
            animation: ripple-effect 0.6s linear;
            pointer-events: none;
            will-change: transform, opacity;
        }
        
        @keyframes ripple-effect {
            to {
                transform: scale(4);
                opacity: 0;
            }
        }
        
        /* Prevent scroll restoration and auto-scroll */
        html {
            scroll-behavior: auto !important;
        }
        
        /* Only enable smooth scrolling after page load */
        html.loaded {
            scroll-behavior: smooth;
        }
        
        /* Prevent animations on page load */
        .preload * {
            animation-duration: 0s !important;
            animation-delay: 0s !important;
            transition-duration: 0s !important;
            transition-delay: 0s !important;
        }