body {
            font-family: 'Poppins', sans-serif;
            background-color: #f7f8fc;
        }

        .header-title {
            font-weight: 900;
            color: #1e293b;
        }

        .header-subtitle {
            color: #64748b;
        }

        .category-title {
            color: #334155;
            font-weight: 700;
        }

        .category-title .bi {
            color: #4f46e5;
            font-size: 1.5rem;
        }

        .item-card {
            transition: all 0.2s ease-in-out;
            cursor: pointer;
            border: 1px solid #e2e8f0;
            background-color: #ffffff;
            border-radius: 0.75rem;
        }

        .item-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px -5px rgba(79, 70, 229, 0.15);
        }

        .item-card .form-check-input {
            display: none;
        }

        .item-card .checkbox-icon {
            width: 1.5rem;
            height: 1.5rem;
            border: 2px solid #cbd5e1;
            border-radius: 0.375rem;
            transition: all 0.2s ease;
            color: transparent;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .item-card .form-check-input:checked+.checkbox-icon {
            background-color: #4f46e5;
            border-color: #4f46e5;
            color: white;
        }

        .selected-card {
            border-color: #4f46e5 !important;
            box-shadow: 0 0 0 2px #c7d2fe;
        }

        .sticky-footer {
            position: sticky;
            bottom: 0;
            background-color: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid #e2e8f0;
        }

        .btn-primary {
            background: linear-gradient(to right, #4f46e5, #6366f1);
            border: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px -5px rgba(79, 70, 229, 0.6);
        }

        .primary {
            color: linear-gradient(to right, #4f46e5, #6366f1);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 20px -5px rgba(79, 70, 229, 0.5);
        }

        .btn-danger {
            background: linear-gradient(to right, #dc3545, #ef4444);
            border: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px -5px rgba(220, 53, 69, 0.6);
        }

        .btn-danger:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 20px -5px rgba(220, 53, 69, 0.5);
        }

        .total-cost-display,
        #savings-calculator {
            opacity: 0;
            transform: translateY(10px);
            transition: opacity 0.5s ease, transform 0.5s ease;
        }

        .total-cost-display.visible,
        #savings-calculator.visible {
            opacity: 1;
            transform: translateY(0);
        }

        #savings-results {
            transition: all 0.3s ease;
        }

        .total-cost-value {
            color: #4338ca;
            font-weight: 900;
        }

        .savings-value {
            color: #15803d;
            font-weight: 700;
        }

        .form-control:focus {
            border-color: #a5b4fc;
            box-shadow: 0 0 0 0.25rem rgba(79, 70, 229, 0.25);
        }

        .legal-text {
            color: #000000;
        }