brain_24.png icon licensed under CC-by 3.0 Unported from user 'Howcolour' on www.iconfinder.com
save-icon-16.png icon licensed under CC-by 3.0 from user 'Bhuvan' from Noun Project
file-icon-16.png icon licensed under CC-by 3.0 from user 'Mas Dhimas' from Noun Project
CSS Gradient tool used: https://cssgradient.io/
Pastel Rainbow color palette by user allyasdf on color-hex: https://www.color-hex.com/color-palette/5361
CSS Trick - border-top-linear-gradient solution fromL https://michaelharley.net/posts/2021/01/12/how-to-create-a-border-top-linear-gradient/