:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --text-main: #334155;
    --text-muted: #64748b;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --border: #e2e8f0;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: white;
    text-decoration: none;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Header */
.site-header {
    background-color: var(--primary);
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand:hover {
    color: white;
    text-decoration: none;
}

.site-nav .nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.site-nav .nav-links a {
    color: #cbd5e1;
    font-weight: 500;
}

.site-nav .nav-links a:hover {
    color: white;
    text-decoration: none;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
}

/* Hero */
.hero-section {
    background-color: var(--primary);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-section h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #cbd5e1;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Layout */
.section {
    padding: 3rem 0;
}

.layout-with-sidebar {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
    margin-top: 3rem;
    margin-bottom: 3rem;
}

/* Cards */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.card-content {
    padding: 1.5rem;
}

.category-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: block;
}

.card-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.card-content h3 a {
    color: var(--primary);
}

.card-content p {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 0.9375rem;
}

.read-more {
    font-weight: 600;
    font-size: 0.875rem;
}

/* Article */
.breadcrumbs {
    margin-bottom: 2rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.article-header {
    margin-bottom: 2rem;
}

.article-header h1 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.article-meta {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.social-share {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.share-btn {
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: white !important;
}

.share-btn.twitter { background-color: #000; }
.share-btn.linkedin { background-color: #0a66c2; }
.share-btn.facebook { background-color: #1877f2; }

.article-body {
    font-size: 1.125rem;
}

.article-body h2 {
    font-size: 1.75rem;
    color: var(--primary);
    margin: 2rem 0 1rem;
}

.article-body h3 {
    font-size: 1.25rem;
    color: var(--primary);
    margin: 1.5rem 0 0.75rem;
}

.article-body p {
    margin-bottom: 1.25rem;
}

.article-body ul, .article-body ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.author-box {
    margin: 3rem 0;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
}

/* Sidebar */
.sticky {
    position: sticky;
    top: 5rem;
}

/* Ads */
.ad-slot {
    background: #f1f5f9;
    border: 1px solid var(--border);
    text-align: center;
    padding: 1rem;
    margin-bottom: 2rem;
}

.ad-label {
    font-size: 0.7rem;
    color: #94a3b8;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.ad-above-fold { margin: 2rem auto; max-width: 970px; }
.ad-multiplex { margin: 3rem 0; }
.ad-sidebar { min-height: 600px; display: flex; flex-direction: column; justify-content: center; align-items: center; }

/* Newsletter */
.newsletter-inline {
    background: var(--primary-light);
    color: white;
    padding: 2rem;
    border-radius: 0.5rem;
    margin: 2rem 0;
    text-align: center;
}

.newsletter-inline h3 {
    margin-bottom: 1rem;
}

.newsletter-inline form {
    display: flex;
    gap: 0.5rem;
    max-width: 400px;
    margin: 0 auto;
}

.newsletter-inline input {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: 0.375rem;
}

/* Footer */
.site-footer {
    background: var(--primary);
    color: #cbd5e1;
    margin-top: auto;
    padding: 4rem 0 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h3 {
    color: white;
    margin-bottom: 1.5rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: #cbd5e1;
}

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

.newsletter-footer {
    margin-top: 1.5rem;
}

.newsletter-footer h4 {
    color: white;
    margin-bottom: 0.5rem;
}

.newsletter-form {
    display: flex;
    gap: 0.5rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.5rem;
    border: none;
    border-radius: 0.25rem;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid #334155;
    padding-top: 2rem;
    font-size: 0.875rem;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 1rem 0;
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
    display: none;
    z-index: 1000;
}

.cookie-banner.show {
    display: block;
}

.cookie-banner .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.cookie-banner p {
    font-size: 0.875rem;
    margin: 0;
}

/* Page Content Form */
.contact-form .form-group {
    margin-bottom: 1.5rem;
}

.contact-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.contact-form input, .contact-form textarea, .search-form input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    font-family: inherit;
}

.search-form {
    display: flex;
    gap: 1rem;
}

.search-form input {
    flex: 1;
}

/* Mobile */
@media (max-width: 768px) {
    .layout-with-sidebar {
        grid-template-columns: 1fr;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .site-nav .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary);
        flex-direction: column;
        padding: 1rem;
        text-align: center;
    }
    
    .site-nav .nav-links.active {
        display: flex;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .cookie-banner .container {
        flex-direction: column;
        text-align: center;
    }
}