:root {
    --primary-color: #2563eb;
    --primary-hover-color: #1d4ed8;
    --secondary-color: #60a5fa;
    --accent-color: #dbeafe;
    
    --text-color: #1f2937;
    --text-secondary: #6b7280;
    --heading-color: #111827;
    
    --body-bg: #ffffff;
    --header-bg: #ffffff;
    --footer-bg: #1f2937;
    --footer-text: #ffffff;
    --footer-text-secondary: rgba(255, 255, 255, 0.8);
    --footer-heading: #ffffff;
    --footer-link: rgba(255, 255, 255, 0.85);
    --footer-link-hover: #60a5fa;
    --footer-border: rgba(255, 255, 255, 0.1);
    
    --card-bg: #ffffff;
    --card-border: 1px solid #e5e7eb;
    
    --nav-color: #1f2937;
    --nav-hover-bg: rgba(37, 99, 235, 0.08);
    
    --link-color: #2563eb;
    --link-hover-color: #1d4ed8;
    
    --border-color: #e5e7eb;
    --border-accent: #60a5fa;
    
    --hero-gradient: linear-gradient(135deg, #2563eb 0%, #60a5fa 100%);
    --hero-text-color: #ffffff;
    
    --cta-bg: #ffffff;
    --cta-text: #2563eb;
    --cta-hover-bg: #f9fafb;
    
    --category-color: #2563eb;
    --category-hover-color: #1d4ed8;
    --category-badge-bg: #dbeafe;
    --category-badge-text: #1e40af;
    --category-badge-hover-bg: #2563eb;
    
    --breadcrumb-color: #6b7280;
    
    --image-placeholder-bg: #f3f4f6;
    
    --tag-bg: #f3f4f6;
    --tag-text: #1f2937;
    --tag-hover-bg: #dbeafe;
    --tag-hover-text: #1e40af;
    
    --share-bg: #f9fafb;
    
    --blockquote-bg: #f9fafb;
    --code-bg: #f3f4f6;
    --code-text: #2563eb;
    --code-block-bg: #1f2937;
    
    --author-box-bg: #f9fafb;
    --related-bg: #f9fafb;
    
    --ad-bg: #f9fafb;
    
    --social-icon-bg: rgba(255, 255, 255, 0.15);
    --social-icon-color: #ffffff;
    --social-icon-hover-bg: #2563eb;
    
    --header-border: 1px solid #e5e7eb;
    --header-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-heading: 'Merriweather', Georgia, serif;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
}

body {
    font-feature-settings: "kern" 1, "liga" 1;
}

.site-header {
    backdrop-filter: blur(8px);
}

.post-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.post-card:hover {
    border-color: var(--secondary-color);
}

button,
.button,
input[type="submit"] {
    font-weight: var(--font-weight-semibold);
}

.entry-content h2::before {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.share-button {
    font-weight: var(--font-weight-semibold);
}

.author-box {
    border-left-width: 4px;
}

.network-site-card:hover {
    border-color: var(--secondary-color);
}

.footer-content h3,
.footer-content h4 {
    font-family: var(--font-body);
    font-weight: var(--font-weight-bold);
}

.page-numbers {
    font-weight: var(--font-weight-medium);
}