Ready to fall in love? Today, we’re helping you say goodbye to your summer flings and find the right fit among next season’s trends! Stay cool during the steamy transition with the following autumn must-haves under $100.     THE TREND: Modern Mod The classic ‘60s aesthetic is taking a new shape this fall as a fresh generation of designers interprets old school style. We spotted this trend on the runway at Miu Miu, Louis Vuitton, and Calvin Klein. THE FINDS: Suede Dress (Zara, $99.90); Grid-Print Blouse & Skirt ($69 each, Dillard’s); Houndstooth Legging ($89, Dillard’s)     THE TREND: Dark Knight Fashion’s dark side is back in the spotlight, making gothic gorgeous again. Pair the look with proportionally diverse pieces and architectural accessories. THE FINDS: Black Waistcoat ($99.90, Zara); Feather-Trim Skirt ($39.99, JCPenney)     THE TREND: Under Cover Traditional hemlines and necklines are now de rigeur – just ask Peter Pilotto and Ralph Lauren. Mix ‘em up with transparent, neutral layers and ultra-high boots. THE FINDS: Striped Shirt Dress ($69.99, H&M); Suede Midi Skirt ($19.99, Necessary Clothing); Cotton Sweater ($85, American Apparel) THE TREND: Tailored Twee From sartorially sweet to auspiciously sophomoric, overtly feminine collections championed girly girls everywhere. With these finds, break out your statement tights and classic heels. THE FINDS: Knit Dress ($99, H&M); Jacquard Jacket ($69.90, Zara)     THE TREND: Boho Homage To conclude, the next iteration of nouveau boho is here, marking yet another renaissance for one of the most enduring trends of the last decade. Fall free spirits were spotted on the runway at Tracy Reese, Derek Lam, Bottega Veneta, and more. THE FINDS: Striped Dress ($90, Topshop at Nordstrom); Fringe Skirt ($99, Dillard’s); Toggle Poncho ($59, Urban Outfitters)   All images via individual brands and retailers.