I am doing the “Build a product landing page” project which is project #3 in Legacy Responsive Web Design
I already added my code for this:
header {
position: fixed;
top: 0px;
width: 100%;
height: 20px;
display: flex;
justify-content: space-between;
align-items: center;
background-color: black;
opacity: 0.8;
}
why is it not working?