Programming Homework Help

Working on a bunch of PHP pages for a web programming project. I need a custom CSS file to make it all look like a professional webpage.

I just want something basic but with my theme that i can use for my php pages in my project. im including the calendar page because i definitely need that table to look good as a calendar. It cant be over convoluted because Im not in advance courses.

Colors: Grey, Orange, Black, White

Including my original mockup (screen sequence), but it needs to look less like a myspace page and more like a website. Something more like this: https://www.webdesigndev.com/wp-content/uploads/2013/10/Screen-Shot-2013-10-24-at-1.57.13-PM.png Not the same obviously. Something just in that direction.