After several seasons of hard, streamlined accessories, designers are taking a more relaxed approach, offering softer and more feminine shapes with an emphasis on unusual details. From handbags to shoes, spring’s coolest pieces have charming twists. Leather handbags are slouchy and rich, and clutches take on semiprecious stone accents, while a messenger bag comes in a fanciful patchwork design. Sexy sandals have bamboo heels, coin charms or appear in lace-up gladiator styles, and whimsical black leather boots feature pearl accents. Belts are made of rope or braided and fringed leather or gussied-up with turquoise and coral. And for the perfect finishing touch, there’s playful jewelry: romantic butterfly pins, ethnic pieces and a slew of charm necklaces and bracelets.