Borders for input boxes on subscribe page

Hey there – – I just made a landing page for people to be able to subscribe to my blog (so I can link them there from inside posts) and the borders on the input boxes aren’t showing up even though they are coded in the embedding code from mail chimp, and show up on the WP builder in the text box… (but not when previewing the page). This same thing happened to my search input box in my blog side bar. You gave me this code for the custom CSS and it worked. Can you give me code for getting the boxes to show up on this subscription page? And possibly a formula for doing it in the future….

.ish-main-sidebar .widget input[type=”text”],
.ish-main-sidebar .widget select {
border: solid 1px;
}

.widget #searchsubmit {
margin: 1px 1px 0 0 !Important;
}