nav.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'helvetica neue';
}
html,
body {
  height: 100%;
  width: 100%;
}
#main {
  height: 100%;
  width: 100%;
}
#nav{
    width: 100%;
    height: 80px;
    background-color: gray;
    display: flex;
    justify-content: space-around;
    align-items: center;
}
#main #center{
  height: 85%;
  width: 100%;
  background-image: url(https://store.storeimages.cdn-apple.com/1/as-images.apple.com/is/store-card-40-iphone-17-pro-202509?wid=800&hei=1000&fmt=jpeg&qlt=90&.v=UzBXQnlhUWdraTNvNU1Kb3pEQlpXQjVOVStZaG1ncWFjNXVUZkZ4anVIYlNab1lJcUZwSFVRK1htYlNmZUtPTG54cStVNU5BQmhzbkxYRGxDWUc3R2RBR0JWVHBRN0NKVm11SFZzeU45T2VCTXFJbjVIbEFUN05pTHFFYldZYzg);
  background-position: center;
  background-size: contain;
  
}