clean and simple mandalas: coloring book line art

mandalas circular geometric patterns solar waves shells coloring pages simplified abstraction jan matejko realistic details symmetrical arrangement bold outlines flat colors sheet film natureinspired motifs clean simple line art book page mandala abstract artistic designs relaxation meditation mindfulness therapy creative expression symmetry harmony balance stunning design adults featuring showcases radiant clusters rounded shapes white background high resolution sophisticated woodblock style includes intricate feather rendering detail generated