/**
 * Modern Optimized CSS - Performance & SEO Focused
 * Mobile-first, responsive design with PageSpeed optimizations
 */

/* Critical CSS - Inline for above-the-fold content */
:root {
    --minimal-bg: #ffffff;
    --minimal-text: #000000;
    --minimal-text-light: #666666;
    --minimal-text-muted: #999999;
    --minimal-accent: #000000;
    --minimal-border: #e5e5e5;
    --minimal-hover: #f5f5f5;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --border-radius: 8px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--minimal-text);
    background: var(--minimal-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Modern Grid System */
.modern-grid {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

@media (max-width: 768px) {
    .modern-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
}

/* Modern Filter System */
.modern-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--minimal-hover);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    min-width: 150px;
    flex: 1;
}

.filter-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--minimal-text);
}

.filter-select,
.filter-input {
    padding: 0.75rem;
    border: 2px solid var(--minimal-border);
    border-radius: var(--border-radius);
    background: var(--minimal-bg);
    color: var(--minimal-text);
    font-size: 0.875rem;
    transition: var(--transition);
    width: 100%;
}

.filter-select:focus,
.filter-input:focus {
    outline: none;
    border-color: var(--minimal-text);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

/* Modern Cards */
.modern-card {
    background: var(--minimal-bg);
    border: 2px solid var(--minimal-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.modern-card:hover {
    border-color: var(--minimal-text);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Lazy Loading Images */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* Responsive Typography */
h1, .h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h2, .h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
}

h3, .h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    line-height: 1.3;
}

/* Modern Buttons */
.modern-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--minimal-text);
    background: var(--minimal-bg);
    color: var(--minimal-text);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    touch-action: manipulation;
}

.modern-btn:hover {
    background: var(--minimal-text);
    color: var(--minimal-bg);
}

.modern-btn-primary {
    background: var(--minimal-text);
    color: var(--minimal-bg);
}

.modern-btn-primary:hover {
    background: var(--minimal-bg);
    color: var(--minimal-text);
}

/* Loading States */
.modern-loading {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 3px solid var(--minimal-border);
    border-top-color: var(--minimal-text);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .modern-filters {
        flex-direction: column;
    }
    
    .filter-group {
        min-width: 100%;
    }
    
    .modern-grid {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .modern-filters,
    .modern-btn {
        display: none;
    }
}