:root {
            --brand-color: #2caa4a;
            --brand-dark: #1f7d36;
            --brand-light: #eaf7ed;
            --brand-soft-bg: #f4fbf6;
            --card-border: #d2ebd8;
            --text-main: #2b303a;
        }

        body {
            background-color: #f3f5f8;
            color: var(--text-main);
            min-height: 100vh;
        }

        .main-color-1 {
            color: var(--brand-color);
        }

        .bg-1 {
            background-color: var(--brand-color);
        }

        /* Card Container Styling */
        .app-header {
            background-color: #003e6b;
            color: #ffffff;
            border-radius: 16px;
            padding: 2.5rem 1.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 8px 20px rgba(44, 170, 74, 0.2);
                margin-top: 80px;
}
        

        .invoice-card {
            background: #ffffff;
            border-radius: 12px;
            border: 1px solid #e1e6eb;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
            padding: 1.75rem;
            margin-bottom: 1.5rem;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .section-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--brand-dark);
            margin-bottom: 1.25rem;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 2px solid var(--brand-light);
            padding-bottom: 8px;
        }

        /* Custom Input Styling */
        .form-floating > label {
            color: #6c757d;
        }

        .form-control:focus, .form-select:focus {
            border-color: var(--brand-color);
            box-shadow: 0 0 0 0.25rem rgba(44, 170, 74, 0.2);
        }

        /* Logo Preview Box */
        .logo-upload-wrapper {
            border: 2px dashed #b5d8be;
            border-radius: 10px;
            padding: 1rem;
            text-align: center;
            background-color: var(--brand-soft-bg);
            transition: all 0.2s ease;
            cursor: pointer;
        }

        .logo-upload-wrapper:hover {
            border-color: var(--brand-color);
            background-color: var(--brand-light);
        }

        .logoPreview {
            max-height: 80px;
            max-width: 140px;
            object-fit: contain;
            border-radius: 6px;
            background-color: #ffffff;
            padding: 4px;
            border: 1px solid #dee2e6;
        }

        /* Invoice Live Preview Document */
        #invoicePreviewContainer {
            display: none;
            margin-top: 2rem;
        }

        .preview-paper {
            background-color: #ffffff;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
            padding: 3rem;
            max-width: 850px;
            margin: 0 auto;
            border: 1px solid #e0e0e0;
        }

        @media (max-width: 768px) {
            .preview-paper {
                padding: 1.5rem;
            }
        }

        .preview-header-line {
            height: 4px;
            background: linear-gradient(90deg, var(--brand-color) 0%, var(--brand-dark) 100%);
            border: none;
            border-radius: 2px;
            margin: 1.25rem 0;
            opacity: 1;
        }

        .table-invoice-items th {
            background-color: var(--brand-color) !important;
            color: #ffffff !important;
            font-weight: 600;
        }

        /* Spin button removal for numbers */
        input::-webkit-outer-spin-button,
        input::-webkit-inner-spin-button {
            -webkit-appearance: none;
            margin: 0;
        }
        input[type=number] {
            -moz-appearance: textfield;
        }

        /* Custom Action Button Styling */
        .btn-brand-primary {
            background-color: var(--brand-color);
            color: #ffffff;
            font-weight: 600;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            transition: all 0.2s ease;
        }

        .btn-brand-primary:hover {
            background-color: var(--brand-dark);
            color: #ffffff;
            transform: translateY(-1px);
        }

        .btn-brand-secondary {
            background-color: #0d6efd;
            color: #ffffff;
            font-weight: 600;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            transition: all 0.2s ease;
        }

        .btn-brand-secondary:hover {
            background-color: #0b5ed7;
            color: #ffffff;
            transform: translateY(-1px);
        }

        /* Message Box Toast Alert */
        .custom-toast {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 9999;
            display: none;
            min-width: 280px;
        }