/* ===== Compound Interest Specific Styles ===== */
        .calc-form select {
            width: 100%;
            padding: 10px 14px;
            font-size: 0.95rem;
            font-family: inherit;
            border: 1.5px solid var(--border);
            border-radius: 10px;
            background: var(--bg);
            color: var(--text);
            outline: none;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .calc-form select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
        }
        
        .chart-container {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
        }
        
        .chart-container canvas {
            width: 100% !important;
            height: auto !important;
            max-height: 280px;
        }
        
        .details-toggle {
            margin-top: 12px;
            text-align: center;
        }
        
        .details-toggle button {
            padding: 10px 24px;
            border: 1.5px solid var(--border);
            border-radius: 8px;
            background: var(--bg);
            font-family: inherit;
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
        }
        
        .details-toggle button:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        
        .details-table {
            margin-top: 12px;
            max-height: 400px;
            overflow-y: auto;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: var(--surface);
            display: none;
            opacity: 0;
            transform: translateY(-10px);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        .details-table.visible {
            display: block;
            opacity: 1;
            transform: translateY(0);
        }
        
        .details-table table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.85rem;
        }
        
        .details-table th {
            background: var(--bg);
            color: var(--text-secondary);
            font-weight: 600;
            text-transform: uppercase;
            font-size: 0.65rem;
            letter-spacing: 0.04em;
            padding: 10px 14px;
            text-align: left;
            border-bottom: 2px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 2;
        }
        
        .details-table td {
            padding: 8px 14px;
            border-bottom: 1px solid var(--border);
            color: var(--text);
        }
        
        .details-table tr:hover td {
            background: var(--primary-light);
        }
        
        .details-table .total-row td {
            font-weight: 700;
            background: var(--primary-light);
        }
        
        .details-table::-webkit-scrollbar {
            width: 4px;
        }
        
        .details-table::-webkit-scrollbar-track {
            background: transparent;
        }
        
        .details-table::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        
        .screenshot-figure {
            margin: 20px 0 30px;
        }
        
        .screenshot-figure img {
            width: 100%;
            max-width: 760px;
            height: auto;
            border: 1px solid var(--border);
            border-radius: 12px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.06);
            display: block;
        }
        
        .screenshot-figure figcaption {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-align: center;
            margin-top: 8px;
        }
        
        .highlight-box {
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            border-radius: 8px;
            padding: 16px 20px;
            margin: 16px 0;
        }
        
        .highlight-box p {
            margin-bottom: 0;
            font-weight: 500;
            color: var(--text);
        }
        
        .calc-form .action-row {
            display: flex;
            gap: 8px;
            margin-top: 8px;
        }
        
        .calc-form .action-row .action-btn {
            flex: 1;
            padding: 10px;
            border: 1.5px solid var(--border);
            border-radius: 8px;
            background: var(--bg);
            font-family: inherit;
            font-weight: 600;
            font-size: 0.8rem;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }
        
        .calc-form .action-row .action-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }