/* Daseb Catalogs - Optimized CSS Stylesheet */
/* Modern, Professional, SEO-Optimized Design */

/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Custom Properties - Design System */
:root {
    /* Color System - 60-30-10 Principle */
    --primary: #0057B7;
    --primary-light: #E6F0FF;
    --primary-dark: #003D82;
    --background-page: #F8F9FA;
    --background-surface: #FFFFFF;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --border-light: #E5E7EB;
    --success: #10B981;
    --warning: #F97316;
    --error: #EF4444;
    
    /* Typography System */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing System (4px base grid) */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-2xl: 64px;
    --space-3xl: 96px;
    
    /* Border Radius System */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-full: 22px;
    
    /* Shadow System */
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 24px rgba(0, 87, 183, 0.12);
    
    /* Transition System */
    --transition-fast: 200ms ease-in-out;
    --transition-normal: 250ms ease-out;
    --transition-slow: 500ms cubic-bezier(0.25, 0.8, 0.25, 1);
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Base HTML and Body Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-secondary);
    background-color: var(--background-page);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Typography Scale */
h1 {
    font-family: var(--font-primary);
    font-size: clamp(2.25rem, 4vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

h2 {
    font-family: var(--font-primary);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

h3 {
    font-family: var(--font-primary);
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.4;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

p {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* Container System */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Hero Section */
.hero {
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, var(--background-page) 0%, var(--background-surface) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 520px;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(0,87,183,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    animation: fadeInUp var(--transition-slow);
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

/* Search Component */
.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-form {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    height: 56px;
    padding: 0 var(--space-lg) 0 3rem;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background: var(--background-surface);
    transition: var(--transition-normal);
    font-family: var(--font-secondary);
    outline: none;
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 87, 183, 0.1);
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    width: 20px;
    height: 20px;
    pointer-events: none;
    z-index: 1;
}

.search-btn {
    position: absolute;
    right: 4px;
    top: 4px;
    height: 48px;
    padding: 0 var(--space-md);
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: var(--font-secondary);
}

.search-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.search-btn:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Navigation Filters */
.filters {
    padding: var(--space-xl) 0;
    background: var(--background-surface);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-sm);
}

.filter-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}

.filter-btn {
    height: 44px;
    padding: 0 var(--space-md);
    background: var(--background-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    transition: var(--transition-fast);
    font-family: var(--font-secondary);
    white-space: nowrap;
    cursor: pointer;
}

.filter-btn:hover,
.filter-btn:focus,
.filter-btn.active {
    background: var(--primary-light);
    border-color: var(--primary-light);
    color: var(--primary-dark);
    outline: none;
}

/* Catalog Grid */
.catalogs {
    padding: var(--space-3xl) 0;
    background: var(--background-page);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.catalog-card {
    background: var(--background-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    position: relative;
    cursor: pointer;
    border: 1px solid var(--border-light);
}

.catalog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.catalog-image {
    aspect-ratio: 1;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

.catalog-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0,87,183,0.1) 0%, rgba(0,87,183,0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.catalog-card:hover .catalog-image::after {
    opacity: 1;
}

.catalog-content {
    padding: var(--space-lg);
}

.catalog-category {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.catalog-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.catalog-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    font-family: var(--font-secondary);
}

.catalog-link:hover {
    color: var(--primary-dark);
    transform: translateX(4px);
}

.link-arrow {
    width: 16px;
    height: 16px;
    margin-left: var(--space-xs);
    transition: var(--transition-fast);
}

/* SEO Content Section */
.seo-content {
    padding: var(--space-3xl) 0;
    background: var(--background-surface);
}

.seo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.seo-item h3 {
    color: var(--primary);
    margin-bottom: var(--space-sm);
}

.seo-item ul {
    margin-left: var(--space-md);
    margin-bottom: var(--space-md);
    list-style-type: disc;
}

.seo-item li {
    margin-bottom: var(--space-xs);
    color: var(--text-secondary);
}

.seo-item strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Footer */
footer {
    background: var(--text-primary);
    color: white;
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-column h3 {
    margin-bottom: var(--space-md);
    position: relative;
    color: white;
}

.footer-column h3::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--primary);
    margin-top: var(--space-xs);
}

.footer-column ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-column li {
    margin-bottom: var(--space-sm);
}

.footer-column a {
    color: #d1d5db;
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: white;
    padding-left: 4px;
}

.footer-contact {
    color: #d1d5db;
    line-height: 1.8;
}

.footer-contact a {
    color: #d1d5db;
}

.footer-contact a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid #374151;
    color: #9ca3af;
    font-size: 0.875rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp var(--transition-slow);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .hero {
        padding: var(--space-2xl) 0;
        min-height: 400px;
    }
    
    .filter-buttons {
        overflow-x: auto;
        padding-bottom: var(--space-xs);
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    
    .filter-buttons::-webkit-scrollbar {
        display: none;
    }
    
    .filter-btn {
        flex-shrink: 0;
    }
    
    .catalog-grid {
        grid-template-columns: 1fr;
    }
    
    .seo-grid {
        grid-template-columns: 1fr;
    }
    
    .search-input {
        padding-right: 100px;
    }
    
    .search-btn {
        padding: 0 var(--space-sm);
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .hero p {
        font-size: 1rem;
    }
    
    .catalog-content {
        padding: var(--space-md);
    }
    
    .search-input {
        height: 52px;
        padding-left: 2.5rem;
    }
    
    .search-btn {
        height: 44px;
        right: 4px;
        top: 4px;
    }
}

/* Performance Optimizations */
img {
    max-width: 100%;
    height: auto;
    loading: lazy;
}

/* Accessibility Improvements */
.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 management for accessibility */
*:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.search-input:focus,
.search-btn:focus,
.filter-btn:focus,
.catalog-link:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Print styles */
@media print {
    .filters,
    .search-container,
    .catalog-link {
        display: none;
    }
    
    .hero {
        background: white !important;
        color: black !important;
    }
    
    .catalog-card {
        break-inside: avoid;
        box-shadow: none !important;
        border: 1px solid #ccc !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary: #000080;
        --text-primary: #000000;
        --text-secondary: #000000;
        --border-light: #000000;
    }
}

/* Dark mode support (if needed in future) */
@media (prefers-color-scheme: dark) {
    /* Dark mode styles can be added here if needed */
}

/* Header and Navigation Styles */
.main-header {
    background: var(--background-surface);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    border-bottom: 1px solid var(--border-light);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
    gap: var(--space-lg);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-image {
    height: 35px;
    width: auto;
    object-fit: contain;
    transition: transform var(--transition-fast);
}

.logo-image:hover {
    transform: scale(1.05);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.logo {
    font-family: var(--font-primary);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
    line-height: 1;
}

.tagline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.2;
}

.main-navigation {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.nav-link:hover {
    color: var(--primary);
    background-color: var(--primary-light);
    transform: translateY(-1px);
}

.nav-link:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

/* Search Suggestions Styles */
.search-suggestions {
    margin-top: var(--space-sm);
}

.suggestion-category {
    margin-bottom: var(--space-sm);
}

.suggestion-category h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.suggestion-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.suggestion-tag {
    background: var(--background-surface);
    border: 1px solid var(--border-light);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.suggestion-tag:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-sm) 0;
    }
    
    .brand {
        flex-direction: row;
        gap: var(--space-xs);
    }
    
    .logo-image {
        height: 28px;
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: var(--space-sm);
        width: 100%;
    }
    
    .nav-link {
        padding: var(--space-sm);
        width: 100%;
        text-align: center;
    }
}