Magento-eyeglasses

We have a few CSS changes that need to be done to a Magento site that sells eyeglasses. Please see images attached. 1. The search box needs to be changed so the search results are over the banner and have a different background so the customer can see the results clearer. 2. on the USPS setting. We want to change 3 titles. change "Media Mail Parcel" to "First Class Mail 2 - 5 Days" change "Priority Mail 1-Day" to "Priority Mail 1-3 Days" change "Priority Mail Express 2-Day" to "Priority Mail Express 1 Day"