/* General Styles & System Font Stack */
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
            background-color: #f3f4f6;
            color: #1f2937;
            display: flex;
            flex-direction: column; /* Stack header, main, footer */
            min-height: 100vh;
            margin: 0;
            box-sizing: border-box;
        }

        /* Header Styles */
        .site-header {
            width: 100%;
            background-color: #ffffff;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            padding: 1rem 2rem;
            box-sizing: border-box;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }
        .site-title {
            font-weight: 700;
            font-size: 1.5rem;
            color: #111827;
        }
        .site-nav a {
            margin-left: 1.5rem;
            text-decoration: none;
            color: #4b5563;
            font-weight: 500;
            transition: color 0.2s;
        }
        .site-nav a:hover {
            color: #2563eb;
        }

        /* Main Content Area */
        main {
            flex: 1; /* Allows main content to grow and fill space */
            display: flex;
            justify-content: center;
            padding: 1rem;
            width: 100%;
            box-sizing: border-box;
        }

        /* Article Container */
        .article-container {
            width: 100%;
            max-width: 48rem; /* 768px */
            background-color: #ffffff;
            border-radius: 1rem; /* 16px */
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
            padding: 2rem;
            animation: fadeIn 0.5s ease-in-out;
            margin: 2rem auto; /* Center the container */
        }

        /* Article Content Styles */
        .article-content {
            line-height: 1.7;
            font-size: 1.1rem;
            color: #374151;
        }
        .article-content header h1 {
            font-size: 2.5rem;
            color: #111827;
            margin-bottom: 0.5rem;
        }
        .article-content .meta {
            color: #6b7280;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .article-content h2, .article-content h3 {
            color: #111827;
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        .article-content h2 { font-size: 2rem; }
        .article-content h3 { font-size: 1.5rem; }
        .article-content p { margin-bottom: 1rem; }
        .article-content a { color: #2563eb; text-decoration: none; }
        .article-content a:hover { text-decoration: underline; }
        .article-content ul, .article-content ol { margin-left: 1.5rem; margin-bottom: 1rem; }
        .article-content blockquote {
            border-left: 4px solid #d1d5db;
            padding-left: 1rem;
            margin: 1.5rem 0;
            font-style: italic;
            color: #6b7280;
        }
        .article-content figure {
            margin: 2rem 0;
        }
        .article-content figure img {
            max-width: 100%;
            height: auto;
            border-radius: 0.5rem;
        }
        .article-content figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: #6b7280;
            margin-top: 0.5rem;
        }
        .article-content aside {
            background-color: #f3f4f6;
            border-radius: 0.5rem;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .article-content footer {
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid #e5e7eb;
            font-size: 0.9rem;
        }
        
        /* Footer Styles */
        .site-footer {
            width: 100%;
            background-color: #1f2937;
            color: #d1d5db;
            padding: 2rem;
            text-align: center;
            box-sizing: border-box;
        }
        .site-footer a {
            color: #9ca3af;
            text-decoration: none;
        }
        .site-footer a:hover {
            text-decoration: underline;
        }

        /* Animation */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        /* Responsive Design */
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
            }
            .site-title {
                margin-bottom: 1rem;
            }
            .site-nav {
                display: flex;
                flex-wrap: wrap;
                justify-content: center;
            }
            .site-nav a {
                margin: 0.5rem;
            }
            .article-container {
                padding: 1.5rem;
                margin: 1rem auto;
            }
            .article-content header h1 { font-size: 2rem; }
            .article-content h2 { font-size: 1.75rem; }
        }