Order Summary Component using HTML and CSS

Your site looks pretty good. Main things you should change are:

• adding a <main> tag around your page's main content for accessibility purposes
• adding hover effect for your "change" button
• centering your container using flexbox instead of what you are using right now. You can do this by assign something like this to your body:

body{
   display: flex;
   flex-direction: column;
   justify-content: center;
   align-items: center;
   height: 100vh;
}

For more one flexbox you could watch these tutorials: link1 link2.

Hope you find this feedback useful 👍