I want a long black formal dress with a youthful and elegant style. The dress should have a moderat

I want a long black formal dress with a youthful and elegant style. The dress should have a moderate sweetheart neckline that is not too revealing. I prefer off-the-shoulder sleeves that sit slightly high on the arms, soft and romantic, not falling too low. The silhouette should be A-line, fitted at the waist to flatter the figure and create a slimming effect. The skirt should be long with light tulle layers, slightly flowy and soft, not overly puffy or voluminous. Overall, I want the dress to look feminine, classy, and suitable for a wedding guest, with a clean design and minimal embellishments.