@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        
        body {
            font-family: 'Inter', sans-serif;
            background-color: #ffffff;
            color: #111827; /* Gray 900 */
        }

        /* Custom Scrollbar - Minimalist Gray */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f3f4f6; 
        }
        ::-webkit-scrollbar-thumb {
            background: #9ca3af; 
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #6b7280; 
        }

        .chart-container {
            position: relative;
            width: 100%;
            max-width: 500px;
            height: 350px;
            max-height: 400px;
            margin: 0 auto;
        }

        .code-block {
            font-family: 'Consolas', 'Monaco', monospace;
            white-space: pre-wrap;
        }

        .fade-in {
            animation: fadeIn 0.3s ease-in-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Active state: Red border, bold text */
        .sidebar-item.active {
            background-color: #f9fafb; /* Gray 50 */
            color: #b91c1c; /* Red 700 */
            border-right: 4px solid #b91c1c;
            font-weight: 600;
        }
        
        /* Utility for red accents */
        .text-accent { color: #b91c1c; }
        .bg-accent { background-color: #b91c1c; }
        .border-accent { border-color: #b91c1c; }