CSS-based web page templates for restricted memory embedded device

Design a fresh looking web site to run on a microcontroller web server using nearly no graphics or pictures and help conserve space for the application. Total available web space is 512KByte, with 64 pages of 8K. The web pages are a means to access control inputs like switches and temperature sensors, outputs like valves or relays etc. and work with a lot of input tags. Take an existing design of 12 pages to the new design and offer templates to accommodate more i/o.