/*
box-shadow: horizontal-offset | vertical-offset | blur-distance | spread-of-shadow | color
Horizontal offset: Negative values position the shadow to the left of the box.
Vertical offset: Negative values position the shadow to the top of the box.
Blur distance: If omitted, the shadow is a solid line like a border.
Spread of shadow: Positive value will cause shadow to expand in all directions, and negative value will make it contract.
*/
box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);