/* ===================================
   Modern & Responsive Design System
   =================================== */

/* CSS Variables for Theme */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-muted: #64748b;
        
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        
        --border-color: #334155;
    }
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

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

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
}

/* Header */
.header {
    background: var(--bg-primary);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem clamp(1rem, 3vw, 2rem);
}

.logo {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform var(--transition-base);
}

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

/* Navigation */
nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: clamp(1rem, 2vw, 2rem);
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    position: relative;
}

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

.nav-menu a:hover {
    color: var(--primary-color);
    background: var(--bg-tertiary);
}

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

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
    padding: 0.5rem;
    transition: transform var(--transition-fast);
}

.mobile-toggle:active {
    transform: scale(0.95);
}

/* Hero Section */
.hero {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: clamp(4rem, 10vw, 8rem) 0;
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: white;
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 12px rgba(0,0,0,0.2);
    animation: fadeInUp 0.8s ease-out;
}

.hero p {
    color: rgba(255,255,255,0.95);
    font-size: clamp(1rem, 2vw, 1.25rem);
    max-width: 700px;
    margin: 0 auto 2rem;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* Search Form */
.search-form {
    background: var(--bg-primary);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    margin: -3rem auto 3rem;
    max-width: 700px;
    position: relative;
    z-index: 10;
    border: 1px solid var(--border-color);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.search-form h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-control {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-base);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

.form-control:hover {
    border-color: var(--primary-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transition: width 0.6s, height 0.6s, top 0.6s, left 0.6s;
    transform: translate(-50%, -50%);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

/* Cards */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
    gap: clamp(1.5rem, 3vw, 2rem);
    margin: 3rem 0;
}

.card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: clamp(1.5rem, 3vw, 2rem);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card:hover::before {
    transform: scaleX(1);
}

.card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 1.25rem;
}

.card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.card .btn {
    width: 100%;
    margin-top: 1rem;
}

/* Blog Cards */
.blog-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.blog-card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    transition: transform var(--transition-base);
}

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

.blog-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.blog-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.blog-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.blog-excerpt {
    flex: 1;
    margin-bottom: 1rem;
}

/* Stats */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
    margin: 3rem 0;
}

.stat-item {
    text-align: center;
    padding: clamp(1.5rem, 3vw, 2rem);
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-tertiary));
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(139, 92, 246, 0.1));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-item:hover::before {
    opacity: 1;
}

.stat-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    position: relative;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 0.5rem;
    display: block;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    margin: 2rem 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-primary);
}

thead {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: white;
}

th {
    padding: 1.25rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition-fast);
}

th:hover {
    background: rgba(255,255,255,0.1);
}

th:first-child {
    border-top-left-radius: var(--radius-lg);
}

th:last-child {
    border-top-right-radius: var(--radius-lg);
}

td {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

tbody tr {
    transition: all var(--transition-fast);
}

tbody tr:hover {
    background: var(--bg-tertiary);
    transform: scale(1.01);
}

tbody tr:last-child td {
    border-bottom: none;
}

.increase {
    color: var(--success);
    font-weight: 600;
}

/* Breadcrumbs */
.breadcrumbs {
    margin: 2rem 0;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.breadcrumb-list {
    display: flex;
    list-style: none;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

.breadcrumb-item {
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.breadcrumb-item:not(:last-child)::after {
    content: '→';
    color: var(--text-muted);
}

.breadcrumb-item a {
    color: var(--primary-color);
    transition: color var(--transition-fast);
}

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

/* Favorite Button */
.favorite-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    transition: transform var(--transition-fast);
    color: var(--text-muted);
}

.favorite-btn:hover {
    transform: scale(1.2);
    color: var(--warning);
}

.favorite-btn.active {
    color: var(--warning);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: var(--bg-secondary);
    padding: clamp(3rem, 5vw, 4rem) 0 1.5rem;
    margin-top: 6rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
    gap: clamp(2rem, 4vw, 3rem);
    margin-bottom: 3rem;
}

.footer-section h3 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-section p {
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: var(--text-muted);
    display: block;
    margin-bottom: 0.75rem;
    transition: all var(--transition-fast);
    padding-left: 1rem;
    position: relative;
}

.footer-section a::before {
    content: '→';
    position: absolute;
    left: 0;
    opacity: 0;
    transition: all var(--transition-base);
}

.footer-section a:hover {
    color: white;
    padding-left: 1.5rem;
}

.footer-section a:hover::before {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: var(--text-muted);
}

/* Ad Spaces */
.ad-space {
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
    border: 2px dashed var(--border-color);
    padding: 2rem;
    text-align: center;
    margin: 3rem 0;
    border-radius: var(--radius-lg);
    color: var(--text-muted);
    font-weight: 600;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin: 3rem 0;
    flex-wrap: wrap;
}

.pagination-item {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 600;
    min-width: 45px;
    text-align: center;
}

.pagination-item:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.pagination-item.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Alerts */
.alert {
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    border-left: 4px solid;
    display: flex;
    align-items: start;
    gap: 1rem;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success);
    color: var(--success);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--error);
    color: var(--error);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--warning);
    color: var(--warning);
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--info);
    color: var(--info);
}

/* Loading States */
.loading {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-menu {
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    nav {
        position: relative;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-xl);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        max-height: calc(100vh - 70px);
        overflow-y: auto;
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .hero {
        padding: 3rem 0;
    }
    
    .search-form {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .pagination-item {
        padding: 0.5rem 0.75rem;
        min-width: 40px;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .ad-space,
    .btn,
    .mobile-toggle {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card,
    .table-responsive {
        break-inside: avoid;
    }
}