Design an energetic Black Friday event poster that utilizes a modern graphic style, featuring a sleek black background that maximizes contrast with a bright color palette dominated by yellows and oranges. Include dynamic illustrations of shopping bags filled with enticing products such as electronics, fashion items, and accessories, designed to appear overflowing to symbolize abundance and great deals. Enhance the celebratory atmosphere with festive elements like confetti or sparkles scattered throughout the design. The main text "Black Friday" should be prominently displayed in large, bold typography using a bright color that contrasts sharply with the black background, such as yellow or orange. Below this, position "Big Sale" in a slightly smaller yet impactful font that maintains boldness while clearly conveying the event's message. Add a vibrant CTA button that says "Book Now," designed to draw immediate attention, possibly in a contrasting color like bright green or electric blue with rounded edges for a modern touch. The overall design should convey a sense of urgency and excitement, targeting young adults aged 18-25, creating a compelling visual that effectively communicates the thrill of Black Friday shopping and encourages immediate action.