Design a captivating banner for a Black Friday online sale with a 16:9 aspect ratio that exudes urgency and luxury. At the center of the banner, prominently display the text 'BLACK FRIDAY' in a bold, modern sans serif font, ensuring it is large and eye-catching. The text should be rendered in a striking white color to contrast against a sleek black background, creating a dramatic effect. Below the main text, incorporate a dynamic arrow graphic that features a gradient design, pointing towards the promotional text that reads 'SALE ONLINE - ALL UP TO 50% OFF.' This promotional text should also be bold, ensuring it captures attention and conveys the significant discounts available. The background should be a rich, deep black, accented with luxurious gold and white elements that enhance the overall aesthetic. To further enrich the design, add various icons and elements that evoke the spirit of shopping and the holiday season, such as shopping carts, gift boxes, and festive decorations. These elements should be strategically placed around the text to create a sense of movement and excitement. Consider incorporating subtle glows or shadows around the text and icons to add depth and enhance visibility. The overall composition should be modern, dynamic, and visually striking, effectively communicating the urgency of the Black Friday sale while maintaining a luxurious feel.