/**
 * ForgeX Performance Optimization CSS
 * Styles for lazy loading, transitions, and performance improvements
 */

/* Lazy Loading Styles */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
}

img.loading {
    opacity: 0.5;
    filter: blur(2px);
}

img.loaded {
    opacity: 1;
    filter: none;
}

img.error {
    opacity: 0.7;
    filter: grayscale(100%);
}

@keyframes loading-shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Critical CSS Loading Indicator */
.css-loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #C0ff6b, #00d4ff);
    z-index: 9999;
    animation: loading-bar 2s ease-in-out;
}

@keyframes loading-bar {
    0% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(0%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* Performance Optimized Animations */
.fade-in-optimized {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    will-change: opacity, transform;
}

.fade-in-optimized.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-up-optimized {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
    will-change: opacity, transform;
}

.slide-up-optimized.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Reduce Motion for Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    img[data-src],
    img.loading,
    img.loaded {
        transition: none;
    }
}

/* Critical Above-the-Fold Styles */
.hero-optimized {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1c1c1c 0%, #2d2d2d 100%);
    contain: layout style paint;
}

.hero-content-optimized {
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 2rem;
}

.hero-title-optimized {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle-optimized {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Performance-Optimized Button */
.cta-button-optimized {
    display: inline-block;
    padding: 1rem 2rem;
    background: linear-gradient(45deg, #C0ff6b, #00d4ff);
    color: #1c1c1c;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    will-change: transform;
    contain: layout style paint;
}

.cta-button-optimized:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(192, 255, 107, 0.3);
}

/* Optimized Grid Layouts */
.feature-grid-optimized {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
    contain: layout;
}

.feature-card-optimized {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease;
    will-change: transform;
    contain: layout style paint;
}

.feature-card-optimized:hover {
    transform: translateY(-5px);
}

/* Font Loading Optimization */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('/static/fonts/inter-regular.woff2') format('woff2');
}

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url('/static/fonts/inter-semibold.woff2') format('woff2');
}

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('/static/fonts/inter-bold.woff2') format('woff2');
}

/* Critical Path CSS */
.above-fold {
    contain: layout style paint;
}

.below-fold {
    content-visibility: auto;
    contain-intrinsic-size: 1000px;
}

/* Performance Monitoring Styles */
.performance-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px;
    border-radius: 5px;
    font-size: 12px;
    z-index: 1000;
    display: none;
}

.performance-indicator.show {
    display: block;
}

.performance-good {
    border-left: 4px solid #4CAF50;
}

.performance-needs-improvement {
    border-left: 4px solid #FF9800;
}

.performance-poor {
    border-left: 4px solid #F44336;
}

/* Responsive Images */
.responsive-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: opacity 0.3s ease;
}

.responsive-image[data-src] {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
}

/* WebP Support Detection */
.webp .responsive-image {
    /* Styles for browsers that support WebP */
}

.no-webp .responsive-image {
    /* Fallback styles for browsers without WebP support */
}

/* Accessibility Improvements */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #C0ff6b;
    color: #1c1c1c;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    z-index: 10000;
    transition: top 0.3s ease;
}

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

/* Screen reader only content */
.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;
}

/* Focus indicators */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid #C0ff6b;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .hero-optimized {
        background: #000000;
        color: #ffffff;
    }

    .feature-card-optimized {
        border: 2px solid #ffffff;
        background: #000000;
    }

    .cta-button-optimized {
        background: #ffffff;
        color: #000000;
        border: 2px solid #000000;
    }
}