/* Theme22 Performance Optimizations CSS */
/* Critical performance improvements for SEO score close to 100% */

/* 1. Layout Stability Improvements (CLS Prevention) */
.hero-section, .car-grid, .testimonials-section {
    contain: layout style paint;
    content-visibility: auto;
}

/* Aspect ratio containers to prevent layout shifts */
.car-image-container {
    aspect-ratio: 16/9;
    overflow: hidden;
    position: relative;
    background: #f3f4f6;
}

.car-image-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease;
}

.testimonial-avatar {
    aspect-ratio: 1;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    background: #e5e7eb;
}

/* 2. Performance Optimizations */
/* GPU acceleration for animations */
.btn, .card, .car-card {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Optimized transitions */
.car-card {
    will-change: transform;
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.car-card:hover {
    transform: translateY(-4px) translateZ(0);
}

/* 3. Skeleton Loading States */
.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; }
}

.car-skeleton {
    height: 300px;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.text-skeleton {
    height: 20px;
    border-radius: 4px;
    margin-bottom: 8px;
}

.text-skeleton.short { width: 60%; }
.text-skeleton.medium { width: 80%; }
.text-skeleton.long { width: 100%; }

/* 4. Responsive Images with WebP Support */
.car-image {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* Lazy loading placeholder */
.img-placeholder {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

/* 5. Enhanced Focus States for Accessibility */
.btn:focus-visible,
.car-card:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* 6. Print Optimizations */
@media print {
    .no-print, 
    .whatsapp-btn, 
    .back-to-top, 
    .loader,
    .modal-overlay {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .car-card {
        break-inside: avoid;
        margin-bottom: 1rem;
    }
}

/* 7. High Contrast Mode Support */
@media (prefers-contrast: high) {
    .btn {
        border: 2px solid;
    }
    
    .car-card {
        border: 2px solid #000;
    }
    
    .text-muted {
        color: #000 !important;
    }
}

/* 8. 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;
        scroll-behavior: auto !important;
    }
}

/* 9. Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .car-image-container {
        background: #374151;
    }
    
    .skeleton {
        background: linear-gradient(90deg, #374151 25%, #4b5563 50%, #374151 75%);
    }
    
    .testimonial-avatar {
        background: #4b5563;
    }
}

/* 10. Critical Performance CSS */
/* Above-the-fold optimizations */
.hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    background-attachment: scroll; /* Better for mobile performance */
}

.hero-content {
    contain: layout;
}

/* Grid optimizations */
.car-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 1rem 0;
}

/* Button optimizations */
.btn-primary {
    background: linear-gradient(135deg, var(--theme-primary-color) 0%, var(--theme-primary-hover) 100%);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-transform: none;
    letter-spacing: 0.025em;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* Finance calculator optimizations */
.finance-calculator {
    contain: layout style;
    border-radius: 1rem;
    background: white;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Testimonials optimizations */
.testimonial-card {
    contain: layout;
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Contact form optimizations */
.contact-form {
    contain: layout;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.15s ease-in-out;
}

.form-input:focus {
    border-color: var(--theme-primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Stock filter optimizations */
.filter-section {
    contain: layout;
    background: #f9fafb;
    border-radius: 1rem;
    padding: 1.5rem;
}

.filter-group {
    margin-bottom: 1rem;
}

/* Mobile optimizations */
@media (max-width: 768px) {
    .hero {
        min-height: 50vh;
        padding: 2rem 0;
    }
    
    .car-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .btn-primary {
        width: 100%;
        text-align: center;
    }
}