#customerFilterDropdown {
            position: absolute;
            background: white;
            border: 1px solid #e5e7eb;
            border-radius: 8px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.12);
            z-index: 1000;
            min-width: 240px;
            max-height: 280px;
            overflow-y: auto;
        }
        [data-theme="dark"] #customerFilterDropdown {
            background: #1f2937;
            border-color: #374151;
            color: #f9fafb;
        }
        #customerFilterDropdown .dropdown-item:hover {
            background: #f3f4f6;
        }
        [data-theme="dark"] #customerFilterDropdown .dropdown-item:hover {
            background: #374151;
        }
        .filter-search-container {
            position: relative;
        }
        /* Kunden-Dropdown über Artikel-Feld anzeigen (DOM-Reihenfolge würde Artikel drüber rendern) */
        .form-group:has(#customerSearch) {
            position: relative;
            z-index: 50;
        }