/* Performance optimized CSS */

/* Lazy load non-critical styles */
.lazy-styles {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lazy-styles.loaded {
    opacity: 1;
}

/* Image loading states */
img.lazy {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img.loaded {
    opacity: 1;
}

/* Loading placeholder */
.img-placeholder {
    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; }
}

/* WebP image support indicators */
.webp .img-webp {
    display: block;
}

.no-webp .img-webp {
    display: none;
}

.webp .img-fallback {
    display: none;
}

.no-webp .img-fallback {
    display: block;
}

/* Video optimization */
video {
    max-width: 100%;
    height: auto;
    object-fit: cover;
}

/* Defer non-critical fonts */
@font-face {
    font-family: 'OptionalFont';
    src: url('/static/fonts/optional.woff2') format('woff2');
    font-display: swap; /* Improves loading performance */
}

/* Minify-ready utility classes */
.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; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }