Shadowing below header?

Store Design
, ,
3

add this css on base.css file

.header-wrapper {
background-color: rgb(var(–color-background));

-webkit-box-shadow: 0 8px 6px -6px black;

-moz-box-shadow: 0 8px 6px -6px black;
box-shadow: 0 6px 14px -14px black;

}