• resets the font sizesso that using semantic markup doesn't affect the styling
• resets the block marginsso that the spacing is only applied when you need it
• resets tablesso that tabular data only takes the space it needs
• preserves the inline paddingsso that buttons and inputs keep their default layout
• sets the border-box box sizingso that borders and paddings don't affect the set dimensions
• sets responsive media elementsso that images and videos scale with the browser width