@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        
        body {
            font-family: 'Inter', sans-serif;
        }
        
        .nav-link {
            transition: all 0.3s ease;
        }

        .nav-link.active {
            color: #6366f1;
            border-bottom: 2px solid #6366f1;
        }

        .mobile-menu {
            transform: translateX(-100%);
            transition: transform 0.3s ease;
        }

        .mobile-menu.open {
            transform: translateX(0);
        }

        .article-card {
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }

        .category-filter {
            transition: all 0.3s ease;
        }

        .category-filter.active {
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            color: white;
            transform: scale(1.05);
        }

        .search-input {
            transition: all 0.3s ease;
        }

        .search-input:focus {
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        .article-content {
            line-height: 1.8;
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 2rem 0 1rem 0;
            color: #374151;
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 1.5rem 0 0.75rem 0;
            color: #4b5563;
        }

        .article-content p {
            margin-bottom: 1.5rem;
            color: #6b7280;
        }

        .article-content ul {
            margin: 1.5rem 0;
            padding-left: 1.5rem;
        }

        .article-content li {
            margin-bottom: 0.5rem;
            color: #6b7280;
        }

        .article-content blockquote {
            border-left: 4px solid #6366f1;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #4b5563;
            background: #f8fafc;
            padding: 1.5rem;
            border-radius: 0.5rem;
        }

        .reading-progress {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 3px;
            background: linear-gradient(90deg, #6366f1, #8b5cf6);
            z-index: 1000;
            transition: width 0.1s ease;
        }

        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.6s ease forwards;
        }

        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }