.gradient-bg {
            background-color: #1d4ed8;
        }
        .checklist-item {
            transition: all 0.3s ease;
        }
        .checklist-item:hover {
            transform: translateY(-2px);
        }
        .calculator-card {
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }
        .calculator-card:hover {
            box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
            transform: translateY(-5px);
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }