How to make my webpage not look so flat? [closed]

1. How do I make my website look less flat?
2. How do I make my website look the same on all screens?

How do I make my website look less flat?

Use of Color: Dynamic and Accents

Bright, energetic hues characterize many flat designs in order to make up the deficit on visual appeal. The luminescent shades that adorn flat designed websites seem to jump off the page, giving the work a look of vibrancy and movement.

How do I make my website look the same on all screens?

Use CSS media queries to apply different styling for small and large screens - Setting large absolute CSS widths for page elements will cause the element to be too wide for the viewport on a smaller device. Instead, consider using relative width values, such as width: 100%.