Design a cohesive sticker set of 20 unique designs featuring the text ‘SpringX’ as the central element. Each sticker should share a unified style with playful, hand-drawn elements. Use vibrant spring colors (greens, yellows, pinks, light blues) with consistent patterns, including flowers, leaves, butterflies, clouds, and simple geometric shapes. The stickers should have a clean, rounded border and soft shadow effects to give them a modern, friendly, and approachable look.