.return-grid-layout {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
    }
    @media (min-width: 768px) {
        .return-grid-layout {
            grid-template-columns: 320px 1fr;
            gap: 24px;
        }
    }
    .invoice-receipt {
        background: #F8FAFC;
        border: 1px dashed #CBD5E1;
        border-radius: var(--radius-md);
        padding: 16px;
        margin-top: 20px;
    }
    .return-item-card {
        background: #FFFFFF;
        border: 1px solid #E2E8F0;
        border-radius: var(--radius-md);
        padding: 16px;
        box-shadow: var(--shadow-xs);
        transition: all var(--transition-fast);
    }
    .return-item-card:hover {
        border-color: var(--primary-light);
        box-shadow: var(--shadow-sm);
    }
    .return-checkbox-wrapper {
        display: flex;
        align-items: center;
        gap: 8px;
        cursor: pointer;
        background: #F1F5F9;
        padding: 6px 12px;
        border-radius: var(--radius-full);
        border: 1px solid transparent;
        transition: all var(--transition-fast);
    }
    .return-checkbox-wrapper:hover {
        background: #E2E8F0;
    }
    .return-checkbox-wrapper.active {
        background: var(--primary-light);
        border-color: var(--primary-color);
        color: var(--primary-color);
    }

@media (max-width: 768px) {
    .return-grid-layout { gap: 12px; }
    .invoice-receipt { padding: 12px; margin-top: 12px; }
    .return-item-card { padding: 12px; }
    .return-checkbox-wrapper { padding: 4px 8px; font-size: 12px; }
}