Design a cheerful, supportive illustration centered around the phrase

Design a cheerful, supportive illustration centered around the phrase 'MENTAL HEALTH MATTERS' in large, colorful, bold, and playful typography. Use a mix of pastel colors, with each letter in a different shade of pink, blue, yellow, orange, and green. Surround the main text with smaller positive affirmations like 'It's OK to not be OK,' 'You are enough,' and 'End the stigma,' each in a playful font. Scatter small, whimsical illustrations like flowers, smiley faces, hearts, and rainbows around the text to enhance the supportive and uplifting theme. Set against a dark, solid background to make the colors pop and ensure the design is visually engaging and easy to read