CSS Design and some HTML modifications

Just got the webpage Navigation Bar and implemented here. Some styling
added too. -Peri
Revert "CSS Design and some HTML modifications"

This reverts commit b58dfbd995cdd110199d247c6ccfceb869d968c5.
Revert "Revert "CSS Design and some HTML modifications""

This reverts commit c550e2b3d1e4d1155996997973dc66fc72ce1fec.